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(12) INTERNATIONAL iUTLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 



(19) World InteUectual Property 
Organization 

International Bureau 



I llllllllllllllllllllllllllllllllllllllllllllllll 



(43) International Publication Date 
7 July 2005 (07.07.2005) 



PCT 



(10) International Publication Number 

WO 2005/062306 Al 



(51) International Patent Classiflcation': 



(22) International Filing Date: 

21 December 2004 (21.12.2004) 



(25) Filing Language: 

(26) Publication Language: 



English 
English 



(30) Priority Data: 

10-2003-0096223 

24 December 2003 (24. L2.2003) KR 
10-2004-0006471 31 January 2004 (31.01.2004) KR 

(71) Applicant: SAMSUNG ELECTRONICS CO., LTD. 

[KR/KR]; 416, Maetan-dong, Yeongtong-gu, Suwon-si, 

I Gyeonggi-do 442-742 (KR). 

I (72) Inventors: HWANG, Sung-Hee; 420-403 Jugong Apt., 
[ 189, Gaepo-dong, Gangnam-gu, Seoul 135-800 (KR). 
j KO, Jung- Wan; 315-401 Cheongmyung Maeul 3-danji 
; Daewoo Apt., 956-2, Yeongtong-dong, Yeongtong-gu, 
I Suwon-si, Gyeonggi-do 443-737 (KR). 



(74) Agent: LEE, Young-Pil; The Cheonghwa Building, 
1571-18, Seocho-dong, Seocho-gu, Seoul 137-874 (KR). 

(81) Designated States (unless otherwise indicated, for e\'ery 
kind of national protection available): AE, AG, AL, AM, 
AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, 
CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, 
GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, IP, KE, 
KG, KP, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, 
MK, MN, MW, MX, MZ, NA, NI, NO, NZ, CM, PG, PI I, 
PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, S Y, TJ, TM, TN, 
TR, TT, TZ, UA, UG, UZ, VC, VN, YLI, ZA, ZM, ZW. 

(84) Designated States (unless otherwise indicated, for e\'ery 
kind of regional protection available): ARIPO (BW, GH, 
GM, KE, LS, MW, MZ, NA. SD, SL, SZ, TZ, UG, ZM, 
ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), 
European (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, H, 
FR, GB, OR, HU, IE, IS, IF, LT, LU, MC, NL, PL, PT, RO, 
SE, SI, SK, TR), OAPI (BF, BJ, CF CG, CI, CM, GA, ON, 
GQ, GW, ML, MR, NE, SN, TD, TG). 

PubUshed: 

— with international search report 



ACCESS INFORMATION 



Al UPDATA COUNT 
TOTAL NUMBER OF TDMAs 



INFORMATION INDICATING LOCATION OF TDMA 
IN WHICH FINAL TDMS IS RECORDED 



INFORMATION INDICATING LOCATION OF TDMA1 
INFORMATION INDICATING LOCATION 0FTDMA2 



INFORMATION INDICATING LOCATION 0FTDMA3 
INFORMATION INDICATING LOCATION 0FTDMA4 



INFORMATION INDICATING LOCATION OF TDMAS 



< 

o 

O 

1^ (57) Abstract: A method and apparatus recording and/or reproducing data on/from a write-once disc therefor, the write-once disc 
having at least one recording layer including: a plurality of update areas in which predetermined updates information is recorded; and 
O at least one access information area in which access information indicating an update area in which final recorded updated informa- 
<S tion is recorded. Reducing access time for reading the updated information using a location of predetermined updated information. 
Q Also, when a plurality of update areas for writing updated information required to use the write-once disc exist, a recording apparatus 
^ or a reproducing apparatus can quickly and easily determine an update area in which final updated information is recorded among 
the pluratity of update areas. 



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For two-letter codes and other abbreviations, refer to the "Guid- 
ance Notes on Codes and Abbreviations" appearing at the begin- 
ning of each regular issue of the PCI Gazette. 



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Description 

METHOD AND APPARATUS FOR RECORDING AND/OR 
REPRODUCING DATA ON/FROM WRITE-ONCE DISC, 
AND WRITE-ONCE DISC THEREFOR 

Technical Field 

[1 ] The present invention relates to a method and apparatus recording and/or re- 

producing data on or frcm a write-once disc, and more particularly, to a method and 
apparatus recording access infonration on the writeonce disc to access more quickly 
information required to use the writeonce disc and a writeonce disc used with the 
above method and apparatus. 

Background Art 

[2] New infonration can be repeatedly recorded on a rewritable disc on which in- 

formation has already been recorded. However, when new information is recorded on a 
writeonce disc, since information that has already been recorded can be neither erased 
nor repeatedly recorded in a location in which the information was recorded, a new 
location must be allocated in order to update the infonration already recorded. 

[3] Generally, only information which has finally been updated is meaningful. 

Therefore, to read the infonration which has finally been updated, an update area is 
allocated to a data area, and a disc drive detects the information which has finally been 
updated by searching for the update area in which updated information is recorded. 
When much information is recorded in the updated area, it takes a lot of time to detect 
desired information. 

[4] On a writeonce disc for which defect iranagement by a drive is performed, areas to 

record infonration for managing defects generated while the writeonce disc is being 
used and information indicating a recording status of the writeonce disc exist. Unlike 
a rewritable disc, according to a characteristic of the writeonce disc, since updated in- 
fonration cannot be repeatedly recorded in a location in which existing infonration 
has been recorded when an update of the defect management information is required, 
the updated information must be recorded in an empty location. Accordingly, a 
relatively wide update area is necessary. In general, the update area is allocated to a 
lead4n area or a leadout area. However, sornetiraes, the update area may be allocated 
to a data area in order to increase an update count according to a user's designation. 

[5] When final updated iirfonnation required to use the writeonce disc is recorded in 

the update area allocated to the data area, and when information indicating that the 



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update area is allocated to the data area and information indicating a location of the 
update area are included in the final updated information, the final updated information 
or a location in which the final updated information is recorded cannot be detected, 
even if the entire update area allocated to the lead4n area or the lead-out area is 
sought. 

Disclosure of Invention 

Technical Solution 

[6] According to an aspect of the present invention, there is provided a write-once disc 

having recorded thereon infoniBtion having a data structure by which an access time 
for reading updated infommtion required to use the write-once disc can be reduced. 

[7] According to another aspect of the present invention, there is also provided a data 

recording method and apparatus by which an access time for reading updated in- 
fonxation required to use a write-once disc can be reduced. 

[8] According to another aspect of the present invention, there is provided a data re- 

producing method and apparatus by which an access time for reading updated in- 
formation required to use a write-once disc can be reduced. 

Advantageous Effects 

[9] According to the present invention, an access time for reading updated information 

can be reduced when a writeonce disc on which predetermined infonxation is updated 
and recorded in a new location is used. Also, when a plurality of update areas for 
writing updated information required to use the writeonce disc exist, a recording 
apparatus or a reproducing apparatus can quickly and easily determine an update area 
in which finally updated information is recorded among the plurality of update areas. 
Description of Drawings 

[10] These and/or other aspects and advantages of the present invention will becane 

more apparent and more readily appreciated from the following description of the em- 
bodiments, taken in conjunction with the accompanying drawings of which: 

[1 1] FIGS. lA and IB are structures of a write-once disc according to an embodiment 

of the present invention; 

[12] FIG. 2 is a detailed structure of a writeonce disc having a single recording layer 

according to an embodiment of the present invention; 

[13] FIGS. 3 A and 3B are detailed structures of a write-once disc having a double 

recording layer according to an embodiment of the present invention; 

[14] FIGS. 4A and 4B are detailed structures of a write-once disc having a double 

recording layer according to another embodiment of the present invention; 



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[15] FIG. 5 illustrates a process of recording data in a user data area and a spare area 

according to an embodiment of the present invention; 
[16] FIG. 6 is a data structure of access infonmtion according to a first embodiment of 

the present invention; 

[17] FIG. 7 is a data structure of access information according to a second embodiment 

of the present invention; 
[18] FIG. 8 is a data structure of access information according to a third embodiment of 

the present invention; 

[19] FIG. 9 is a data structure of access information according to a fourth embodiment 

of the present invention; 
[20] FIG. 10 is a data structure obtained by dividing an entire TDMA into a plurality of 

virtual TDMAs; 

[21] FIG. 1 1 is a block diagram of a recording apparatus according to an embodiment of 

the present invention; and 
[22] FIG. 12 is a flowchart illustrating a recording method according to an embodiment 

of the present invention. 

Best Mode 

[23] According to an aspect of the present invention, there is provided a writeonce disc 

having at least one recording layer, the disc including: a plurality of update areas in 
which predetermined updated information is recorded; and at least one access in- 
formation area in which access information is recorded, the access information 
indicating an update area in which final updated information is recorded. 

[24] According to another aspect of the present invention, there is provided a method of 
recording data on a writeonce disc, the method including: recording predetermined 
updated information in one of a plurality of update areas allocated to the writeonce 
disc; and recording access information indicating an update area in which final updated 
information is recorded in at least one access information area allocated to the write- 
once disc. 

[25] According to another aspect of the present invention, there is provided an apparatus 
for recording data on a writeonce disc, the apparatus including: a write/read unit 
writing or reading information on or from the writeonce disc; and a controller 
controlling the write/read unit to record predetermined updated information in one of a 
plurality of update areas allocated to the writeonce disc and record access information 
indicating an update area in which final updated information is recorded in at least one 
access information area allocated to the writeonce disc. 



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[26] According to another aspect of the present invention, there is provided a method of 

reproducing a write-once disc, the method including: obtaining final updated access in- 
formation frcm at least one access information area allocated to the write-once disc; 
and obtaining information indicating an update area in which the final updated access 
information is recorded among a plurality of update areas allocated to the writeonce 
disc from the final updated access information. 

[27] According to another aspect of the present invention, there is provided an apparatus 

for reproducing a write-once disc, the apparatus including: a reader reading data 
recorded on the write-once disc; and a controller controlling the reader to obtain final 
updated access information fran at least one access information area allocated to the 
writeonce disc and obtaining information indicating an update area in which the final 
updated access information is recorded among a plurality of update areas allocated to 
the writeonce disc fi-on the final updated access infonnation. 

[28] Additional aspects and/or advantages of the invention will be set forth in part in the 
description which follows and, in part, will be obvious from the description, or may be 
learned by practice of the invention. 

Mode for Invention 

[29] Reference will now be made in detail to the embodiments of the present invention, 

examples of which are illustrated in the accompanying drawings, wherein like 
reference nunerals refer to the like elements throughout. The embodiments are 
described below to explain the present invention by referring to the figures. 

[30] FIGS. lA and IB are structures of a write-once disc according to an embodiment of 
the present invention. FIG. 1 A is a structure of a writeonce disc having a single 
recording layer, and FIG. IB is a structure of a writeonce disc having a double 
recording layer. 

[31] The writeonce disc having a single recording layer includes a lead-in area, a data 
area, and a leadout area arranged fi-om the inner circurf erence to the outer cir- 
cmference. 

[32] Each of a first recording layer LO and a second recording layer LI of the writeonce 
disc having a double recording layer includes a lead-in area, a data area, and a leadout 
area arranged from the inner drcutf erence to the outer circurf erence. 

[33] FIG. 2 is a detailed structure of the writeonce disc having a single recording layer 

according to an embodiment of the present invention. Referring to FIG. 2, the lead-in 
area includes a first disc management area (DMAl), a second disc management area 
(DMA2), a first temporary disc management area (TDMAl), an access information 



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area (AIA), and a recording condition test area. The lead-out area includes a third disc 
management area (DMA3) and a fourth disc management area (DMA4). Also, the 
lead-out area may further include at least one of a temporary defect management area, 
a recording condition test area, and an AIA. That is, there may be at least one of the 
AIA, the DMA, the TDMA, and the recording condition test area in at least one of the 
lead4n areas and/or the lead-out areas. 

[34] FIGS. 3 A and 3B are detailed structures of the write-once disc having a double 

recording layer according to an embodiment of the present invention. FIG. 3A is a 
structure of a first recording layer LO, and FIG. 3B is a structure of a second recording 
layer LI . The structure of the first recording layer LO shown in FIG. 3 A is identical to 
the structure of the writeonce disc having a single recording layer shown in FIG. 2. 
The structure of the second recording layer LI shown in FIG. 3B is similar to the 
structure of the first recording layer LO. However, in the structure of the second 
recording layer LI, the AIA is not allocated to a second inner area, and two TDMAs 
are allocated to a second data area. 

[35] The write-once disc having a double recording layer includes five TDMAs, a 

TDMAl through a TDMAS. Locations and sizes of the TDMAl and TDMA2 are well 
known to recording apparatuses and/or reproducing apparatuses. However, a TDMAS, 
a TDMA4, and the TDMAS are allocated to data areas by a user or a recording 
apparatus and/or a reproducing apparatus when a disc initialization is performed to use 
the writeonce disc having a double recording layer. When a temporary disc 
management structure (TDMS) is recorded fi-om the TDMAl, a temporary disc defect 
structure (TDDS) including sizes and locations of TDMAs allocated to the data areas 
is recorded in the TDMAl. 

[36] FTGs. 4A and 4B are detailed structures of the writeonce disc having a double 

recording layer according to another embodiment of the present invention. FIG. 4A is 
a structure of a first recording layer LO, and FIG. 4B is a structure of a second 
recording layer LI. A TDMAl, a TDMA2, and a TDMAS are allocated to the write- 
once disc having a double recording layer shown in FIGs. 4A and 4B. That is, besides 
the well known TDMAl and TDMA2, only the TDMAS is allocated to a second data 
area by a user or a recording apparatus and/or a reproducing apparatus when a disc ini- 
tialization is performed to use the writeonce disc having a double recording layer. 

[37] Areas, such as TDMAs allocated to a write-once disc, and a process of recording 

data in the areas will now be described. 

[38] A TDMA is an area where TDMS for management of the write-once disc is 



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recorded before a finalization of the write-once disc. The finalization of the write-once 
disc is an operation preventing the write-once disc from being recorded again. When 
data cannot be recorded on the write-once disc any ncre by a selection of a user, or 
when data cannot additionally be recorded on the write-once disc, the write-once disc 
is finalized. 

[39] The TDMS includes a temporary defect list (TDFI.), a TDDSi and a space bit map 

(SBM). The TDFL includes information indicating an area in which a defect is 
generated and information indicating a substitute area. The TDDS manages the TDFL 
and includes a location pointer indicating a location in which the TDFL is recorded, a 
location pointer indicating a location in which the SBM is recorded, information 
indicating locations and sizes of spare areas allocated to data areas, and information 
indicating locations and sizes of TDMAs allocated to the data areas. The SBM shows a 
data recording status of the writeonce disc with a bit map by allocating different bit 
values to clusters in which data is recorded in cluster units, which are data recording 
units, and clusters in which data is not recorded. 

[40] When the write-once disc is loaded into the recording apparatus and/or the re- 

producing apparatus, a finally updated TDMSi in particular, the TDDS is quickly 
required to use the writeonce disc in the apparatus. 

[41 ] Conmonly, when the writeonce disc is loaded into the recording apparatus and/or 

the reproducing apparatus, the recording apparatus and/or the reproducing apparatus 
determines how to manage the writeonce disc and how to record or reproduce data by 
reading information from the lead-in area and/or the leadout area. If an amount of in- 
formation recorded in the lead-in area and/or the leadout area is large, more time is 
taken to prepare recording or reproducing after the writeonce disc is loaded. 
Therefore, the TDMS is used, and the TDMS generated while data is recorded on or 
reproduced from the writeonce disc is recorded in the TDMA, which is separated 
fron a defect management area, and allocated to the lead4n area and/or the leadout 
area. 

[42] When the writeonce disc is finalized, the TDMS; i.e., the TDFL and the TDDSi 

recorded in the TDMA is finally recorded in a DMA since an information access to 
quickly use the writeonce disc is possible by allowing the recording or reproducing 
apparatus to read only meaningfiil information from the defect management area by 
storing only final meaningfiil information among TDFLs and TDDs, which are 
updated and recorded several times, in the DMA. 

[43] FIG. 5 illustrates a process of recording data in a user data area and a spare area 



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according to an embodiment of the present invention. 
[441 Referring to FIG. 5, A indicates the user data area, and B indicates the spare area. A 

method of recording user data in the user data area includes a continuous recording 
mode and a randan recording mode. The user data is recorded continuously and se- 
quentially in the continuous recording mode and randomly in the random recording 
mode. Zones ® through ® indicate units in which verification after recording is 
performed. 

[45] A recording apparatus writes the user data in zone ® and verifies whether the user 

data has normally been written or a defect has been generated in zone ® . If a portion 
in which the defect has been generated is found, the portion is designated as a defect 
area, i.e., defect #1. Also, the recording apparatus rewrites the user data, which has 
been written in the defect #1 , in the spare area. A portion in which the user data that 
has been written in the defect #1 is rewritten is called a substitute #1. The recording 
apparatus writes the user data in the zone (D and verifies whether the user data has 
nomally been written or a defect has been generated in zone (l> . If a portion in which 
the defect is generated is found, the portion is designated as a defect area, i.e., defect 
#2. Likewise, a substitute #2 corresponding to the defect #2 is generated. Also, in zone 
<S) , a defect #3 and a substitute #3 are generated. In zone ® , a defect area does not 
exist since a portion in which a defect has been generated is not found. 

[46] If an end of a recording operation #1 is predicted after the user data is written and 

verified, that is, if a user pushes an eject button, or if recording of the user data 
allocated to a recording operation is finished, the recording apparatus writes in- 
fonration related to the defect #1, and the defect #2, and the defect #3, which are 
defect areas generated in the zones ® through ® , in the TDMA as a TDFL #1 . Also, a 
management structure to manage the TDFT. #1 is written in the TDMA as a TDDS #1 . 
The recording operation is a work unit determined by an intention of the user or a 
desired recording work. In the present embodiment, the recording operation indicates a 
period fron when the writeonce disc is loaded and a recording work of predetermined 
information is performed to when the write-once disc is unloaded fi-om the recording 
apparatus. 

[47] When the writeonce disc is loaded again, a recording operation #2 starts, a 

recording condition in the recording condition test area is tested, and the user data is 
written on the basis of the test result. That is, in the recording operation #2, the user 
data is written in zones © through ® in the same maimer as recording operation #1, 
and a defect #4, a defect #5, a substitute #4, and a substitute #5 are generated. When 



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the recording operation #2 ends, the recording apparatus writes information related to 
the defect #4 and the defect #5 in the TDMA as a TDFL #2. Also, a management 
structure to manage the TDFL #2 is written in the TDMA as a TDDS #2. 
[48] As shown in FIGS. 2 through 4, when a plurality of TDMAs and spare areas are 

allocated to the write-once disc, the TDMAs and spare areas are used in a pre- 
determined order. For example, when a data write path applied to the write-once disc 
having a double recording layer shown in FIG. 3 is an opposite track path, i.e., a path 
where data is recorded from a first inner area of the first recording layer LO to a first 
outer area of the first recording layer LO and a second inner area of the second 
recording layer LI to a second outer area of the second recording layer LI, data in the 
spare areas is recorded from a first spare area of the first recording layer LO. When the 
first spare area is full, a second spare area, a third spare area, and a fourth spare area 
are used in this order. 

[49] Likewise, the TDMS is recorded from the TDMAl of the first recording layer LO. 
When the TDMAl is fiiU, an updated TDMS is recorded in the TDMA2 allocated to 
the second inner area of the second recording layer LI. When the TDMA2 is full, a 
newly updated TDMS is recorded in the TDMA3 allocated to a first data area of the 
first recording layer LO. In the present embodiment, the TDMAl and the TDMA2 
allocated to the inner areas of the recording layers are preferred for the writeonce disc. 
However, the TDMA(s) allocated to the data areas may be or nay not be allocated by 
a selection of the user. Therefore, when the TDMAs allocated to the inner areas of the 
recording layers are full, the TDMAs allocated to the data areas are used. 

[50] When a final updated TDMS is written in a TDMA allocated to a data area, a write- 
once disc is unloaded, and the writ&once disc is reloaded into a recording apparatus. 
The recording apparatus must obtain the final updated TDMS to use the writeonce 
disc. However, the TDMS is recorded in the TDMA allocated to the data area, and a 
disc drive cannot recognize the fact that the TDMS is recorded in the TDMA allocated 
to the data area until the disc drive accesses the TDDS included in the TDMS. 

[51] To solve this problem, an AIA is separately allocated to a predetermined location of 

the writeonce disc in the present invention. Access information (AI) is recorded in the 
AIA. The AI indicates a location where update information such as the TDMS is 
recorded. 

[52] Also, the update irrforiEation indicates information that a recording and/or re- 

producing apparatus must recognize to use a writeonce disc in an initial period when 
the writeonce disc is loaded into the recording and/or reproducing apparatus. Also, an 



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area in which the update infonmtion is recorded is called an update area. In the present 
embodiment, a representative update information is the TDMS^ and a representative 
update area is the TDMA. 

[53] As shown in FIGS. 2 through 4, the AIA is preferably, but not necessarily, allocated 

to a predetermined location of the leadin area or an inner area. Also, the size of the 
AIA is preferably, but not necessarily, limited by minimizing an amount of AI 
recorded in the AIA and an AI update count since it takes longer to obtain the Alif the 
size of the AIA is larger or a plurality of AIAs are allocated. 

[54] FIG. 6 is a data structure of access information (AI) according to a first 

embodiment of the present invention. The AI shown in FIG. 6 illustrates the TDMSs as 
update information, TDMAs as update areas, and the AI in the write-once disc having 
a double recording layer shown in FIG. 3. 

[55] Referring to FIG. 6, an AI header includes an AI identifier indicating that the 

following data is the AI and an AI update count showing an update count of the AI. 

[56] The AI includes a total nunber of TDMAs allocated to a writ&once disc, in- 
formation indicating a TDMA in which a final TDDS is recorded, and information 
indicating locations of the TDMAs. Each TDMA location information may include in- 
formation indicating a beginning position and an ending position of each TDMA or in- 
formation indicating a beginning or ending position and the size of each TDMA. Snce 
the TDDS includes a pointer indicating a location of a corresponding TDFL, the AI 
includes information indicating the TDMA in which the final TDDS is recorded. 

[57] When a writeonce disc according to the present invention is loaded into a disc 

drive, the disc drive can recognize a TDMA in which a final TDDS is recorded by 
accessing an AIA in an already known location and obtaining final updated AI and 
obtain a final TDDS ftan the TDMA. To minimize an access time to obtain the final 
AI recorded in the AIA, it is preferable, but not necessary, that AI is continuously 
recorded in the AIA at the continuous recording mode and the AI update count is 
minimized. 

[58] According to an embodiment of the present invention, to minimize the AI update 
count, the AI is updated whenever the TDMA in which the final TDDS is recorded is 
changed. Also, when information indicating the number of TDMAs allocated to the 
write-once disc and information indicating locations of the TDMAs are included in the 
AI, the AI is also updated when a new TDMA is allocated or the information 
indicating locations of the TDMAs is changed. Also, it is preferable, but not necessary, 
that the same AI is repeatedly recorded to prepare for when an error is generated in the 



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recorded AI. 

[591 Snce AI to be updated is continuously recorded after previous AI, even if in- 

formation indicating a detailed address at which a final TDDS is recorded is not 
included in the AI, a recording apparatus and/or a reproducing apparatus can quickly 
seek a location in which the final TDDS is recorded by recognizing a border between a 
data recorded area and a data non-recorded area using a track jimp method since a 
difference exists between an RF signal obtained fton the data recorded area and an RF 
signal obtained from the data non-recorded area. 

[601 FIG. 7 is a data structure of AI according to a second embodiment of the present 

invention. The AI shown in FIG. 6 includes information indicating locations of all 
TDMAs and information indicating a TDMA in which a final TDDS is recorded. 
However, the AI shown in FIG. 7 includes information indicating a location of a 
TDMA in which a final TDDS is recorded. The infonnation indicating the location of 
the TDMA in which the final TDDS is recorded can be represented as an address of a 
first physical sector of a first cluster of the TDMA and an address of a first physical 
sector of a last cluster of the TDMA. However, it will be understood by those of 
ordinary skill in the art that various changes in the method of representing the in- 
formation indicating the location of the TDMA in which the final TDDS is recorded 
may be made therein without departing firan the spirit and scope of the present 
invention. 

[61] FIG. 8 is a data structure of AI according to a third embodiment of the present 

invention. The data structure of the AI shown in FIG. 8 is identical to a data structure 
of a TDDS. That is, the TDDS is used as the AI without defining a separate data 
structure of the AI. To use the TDDS as the AI, an information field indicating a 
location of a TDMA in which a final TDDS is recorded must be added to the TDDS. 

[62] FIG. 9 is a data structure of AI according to a fourth embodiment of the present 

invention. The data structure of the AI shown in FIG. 9 is identical to a data structure 
of a TDDS as described in the third embodiment. However, unlike the third 
embodiment, a flag indicating a location of a TDMA in which a final TDDS is 
recorded is further included in the TDDS. In the present embodiment, the flag is made 
up of 8 bits, 5 bits, bO through b4, indicating the TDMA in which the final TDDS is 
recorded and 3 bits, bS through b7, being reserved bits. For example, it can be defined 
that the final TDDS is recorded in the TDMAl when bO trough b4 are '00001b', the 
TDMA2 when bO trough b4 are '00010b', the TDMA3 when bO trough b4 are '00100b', 
the TDMA4 when bO trough b4 are '01000b', and the TDMA5 when bO trough b4 are 



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'10000b'. 

[631 The plurality of TDMAs allocated to the write-once disc according to the present 

embodiments are continuously used on the basis of a data recording direction. 
Therefore, considering physically plural TDMAs as one consecutive TDMA, the one 
consecutive TDMA can be divided into a plurality of virtual TDMAs. 

[64] FIG. 10 is a data structure obtained by dividing an entire TDMA into a plurality of 

virtual TDMAs. For example, in the write-once disc having a double recording layer, 
when the TDMAs are used in the order of the TDMAl , the TDMA2, the TDMA3, the 
TDMA4, and the TDMAS, and if each of the TDMAl and the TDMA2 includes 2048 
clusters, each of the TDMAS and the TDMA4 includes 4096 clusters, and the TDMA5 
includes 8192 clusters, the entire TDMA includes 20480 clusters. If the entire TDMA 
is divided into 512-cluster units, 1024-cluster units, or 2048-cluster units, the entire 
TDMA can be divided into 40, 20, or 10 virtual TDMAs. 

[65] If the size of the TDMA3 among the TDMAl through the TDMAS allocated to the 
writeonce disc is very large, and if a final TDDS is recorded in the TDMA3, a 
recording and/or reproducing apparatus recognizes the fact that the final TDDS is 
recorded in the TDMA3 from AI and obtains the final TDDS by seeking the TDMA3. 
However, when the size of the TDMA3 is very large, it can take a long time to seek the 
TDMA3 in order to obtain the final TDDS. Therefore, to solve this problem, a concept 
of the virtual TDMAs described above is used. The size of each virtual TDMA can be 
the same as shown in FIG. 10. However, the size of each virtual TDMA is not limited 
to the present embodiment. 

[66] The recording and/or reproducing apparatus divides the entire TDMA into the 
plurality of virtual TDMAs and updates the AI when a Aortual TDMA in which the 
final TDDS is recorded is changed. Each of the data structures according to the first 
through fomth embodiments can be used as the data structure of the AI according to 
the present embodiment. However, the AI of the present embodiment includes in- 
formation indicating a virtual TDMA in which the final TDDS is recorded or in- 
formation indicating a location of the virtual TDMA in which the final TDDS is 
recorded. 

[67] FIG. 1 1 is a block diagram of a recording apparatus according to an embodiment of 

the present invention. 

[68] Referring to FIG. 11 , the recording apparatus includes a write/read unit 1, a 

controller 2, and a memory 3. The write/read unit 1 writes data on a write-once disc 
100 and reads the recorded data to verify whether a defect exists in the recorded data. 



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PCT/KR2004/003378 



An AIA according to the present invention is allocated to the write-once disc 100. 

[691 To manage the defect, the controller 2 uses a verify after write method of detecting 

a portion in which a defect is generated by writing data in predetermined units and 
verifying the recorded data. The controller 2 checks where defects are generated by 
writing and verifying user data in each recording operation unit, generates a defect list 
indicating where defect areas exist as the checking results, stores the generated defect 
list in the memory 3, gathers a plurality of defect lists, stores the plurality of defect 
lists in an update area allocated to the write-once disc 100, i.e., a TDMA, as a TDFL, 
and further writes a TDDS for managing the recorded TDFL in the TDMA. During 
one recording operation, a verify after write work is performed at least once, and 
commonly, several times. A defect list obtained by performing the verify after write 
work is temporarily stored in the memory 3 as a TDFT.. When the recording operation 
finishes, the controller 2 reads the TDFL stored in the memory 3, provides the TDFL 
to the write/read unit 1, and carmands the write/read unit 1 to write the TDFL in the 
TDMA allocated to the writeonce disc 100. 

[70] When data cannot be recorded on the write-once disc 100 any more, or when a user 
does not desire to write data in a data area any more (when the writeonce disc 100 is 
finalized), the controller 2 writes the TDFL and the TDDS recorded in the TDMA in a 
DMA allocated to the writeonce disc 100. 

[71] The controller 2 controls the write/read unit 1 to write data having a data structure 
according to the present invention. That is, the controller 2 controls the write/read unit 

1 to write predetermined update information, i.e., a TDMS including a TDFL or a 
TDDS^ in one of a plurality of update areas allocated to the write-once disc 100 and 
write update AI in an AIA allocated to the writeonce disc 100 when it is necessary to 
update the AI. 

[72] A method of recording AI according to an aspect of the present invention will now 

be described in detail on the basis of the structure of the recording apparatus described 
above. 

[73] FIG. 12 is a flowchart illustrating a recording method according to an embodiment 

of the present invention. 
[74] When the writeonce disc 100 is loaded into the recording apparatus, the controller 

2 controls the write/read unit 1 to write predetermined user data on the writeonce disc 
100 in operation 71. 

[75] It is determined whether information to be updated is generated as a result of 

performing a verify after write work, which is performed at least once during one 



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PCT/KR2004/003378 



recording operation in operation 73. In the present embodiment, the information to be 
updated indicates a TDMS. When the TDMS is generated, the TDMS is temporarily 
stored in the memory 3, and when the recording operation is finished, the controller 2 
reads a TDFL stored in the memoiy 3 and provides the TDFL to the write/read unit 1, 
and the write/read unit 1 writes the TDFL in one of a plurality of update areas 
allocated to the write-once disc 100 in operation 75. In the present embodiment, the 
update area indicates a TDMA. 

[76] The controller 2 determines whether another recording operation exists in operation 

77, and if another recording operation exists, operations 71 through 77 are repeated. 

[77] If another recording operation does not exist, the controller 2 determines whether it 

is necessary to update AI in operation 79. In the present embodiment, when a TDMA 
in which a final TDMS^ and in particular a final TDDSi is recorded is changed, when a 
new TDMA is allocated, or when infonration indicating a location of an existing 
TDMA is changed, the AI is updated. 

[78] The controller 2 controls the write/read unit 1 to write the AI indicating an update 
area in which final updated information is recorded anx)ng a plurality of update areas 
in an AIA at least one of which is allocated to the writeonce disc 100 in operation 81. 
It is preferable, but not necessary, that the same AI is repeatedly recorded in the event 
an error is generated in the recorded AI. 

[79] As described above, if AI indicating a location in which a final TDMS is recorded 
is recorded in an AIA of the write-once disc 100, when the writeonce disc 100 is 
loaded into a recording apparatus or a reproducing apparatus again, the recording 
apparatus or the reproducing apparatus can access a final TDDS more quickly and 
easily. 

[80] An apparatus (not shown) for reproducing the writeonce disc 1 00 including an 

AIA in which AI according to the present invention is recorded has a similar structure 
to the recording apparatus shown in FIG. 11. However, since it is a reproducing 
apparatus, a reader is included instead of the write/read unit 1. When the write-once 
disc 100 including the AIA in which the AI is recorded, is loaded into the reproducing 
apparatus, the reproducing apparatus determines whether the writeonce disc 100 is 
finalized by accessing a DMA and determining whether data is recorded in the DMA. 
If the writeonce disc 100 is not finalized, the reproducing apparatus accesses the AIA 
and obtains final AI. The recording apparatus or the reproducing apparatus recognizes 
the TDMA in which the final TDDS is recorded from the final AI. Operations of the 
reproducing apparatus according to the present invention can be easily understood by 



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PCT/KR2004/003378 



those skilled in the art fratn the description of the write-once disc 100 including the 
AIA and the recording apparatus therefor. 

[81] If the write-once disc 100 is a blank disc which is not initialized, data is not 

recorded in the AIA at all. The recording apparatus performs initialization to use the 
write-once disc 100. When the write-once disc 100 is initialized, first AI having a data 
structure according to various embodiments as described above is recorded in a first 
recording cluster of the AIA 

[82] Although a few embodiments of the present invention have been shown and 

described, it would be appreciated by those skilled in the art that changes may be made 
in these embodiments without departing fran the principles and spirit of the invention, 
the scope of which is defined in the claims and their equivalents. 



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PCT/KR2004/003378 



Claims 

[1] 1. A write-once disc having at least one recording layer, the disc comprising: 

a plurality of update areas in which predetermined updated information is 
recorded; and 

at least one access information area (AIA) in which access information (AI) is 
recorded, the AI indicating an update area in which final updated information is 
recorded. 

[2] 2. The disc of claim 1, wherein the AI includes at least one of the plurality of 

update areas or information indicating locations of the at least one of the 

plurality of update areas. 
[3] 3. The disc of claim 2, wherein the information indicating the locations of the at 

least one of the pluraUty of update areas includes a beginning position and an 

ending position of each update area. 
[4] 4. The disc of claim 2, wherein the information indicating the locations of the at 

least one of the plurality of update areas includes a beginning position and a size 

of each update area. 

[5] 5. The disc of claim 2, wherein the information indicating the locations of the at 

least one of the plurality of update areas includes an ending position and a size of 
each update area. 

[6] 6. The disc of claim 1, wherein the AI is updated only when the update area, in 

which the final updated information is recorded, is changed. 

[7] 7. The disc of claim 2, wherein the AI is updated when a new update area is 

added. 

[8] 8. The disc of claim 2, wherein the AI is updated when the information 

indicating the locations of the at least one of the plurality of update areas is 
changed. 

[91 9. The disc of claim 1, wherein the AI is repeatedly recorded in the AIA. 

[10] 10. The disc of claim 1 , wherein the AI is a flag indicating the update area in 

which the final updated information is recorded. 
[Ill 11- The disc of claim 1, wherein the plurality of update areas are physical areas. 

[121 12. The disc of claim 1, wherein the plurality of update areas are obtained by 

logically dividing a plurality of physical areas. 
[131 13. The disc of claim 1, wherein the predetermined updated information is a 

temporary disc defect structure (TDDS), and the update area is a temporary disc 



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PCT/KR2004/003378 



management area (TDMA). 

[141 14. The disc of claim 1, wherein the write-once disc is a write-once disc having a 

single recording layer including a lead4n area, a data area, and a lead-out area, 
and the at least one AIA is allocated to the leadin area or the lead-out area. 

[15] 15. The disc of claim 1, wherein the write-once disc is a writeonce disc haAong a 

double recording layer, each recording layer includes an inner area, a data area, 
and an outer area, and the at least one AIA is allocated to the inner areas or the 
outer areas. 

[161 16. A method of recording data on a write-once disc, the method comprising: 

recording predetermined updated information in one of a plurality of update 
areas allocated to the writeonce disc; and 

recording access information (AT) indicating an update area in which final 

updated infomation is recorded in at least one access infonration area (AIA) 

allocated to the writeonce disc. 
[171 17. The method of claim 16, wherein the AI includes at least one of the plurality 

of update areas or information indicating locations of the at least one of the 

plurality of update areas. 
[181 18. The method of claim 17, wherein the information indicating locations of the 

at least one of the plurality of update areas includes a beginning position and an 

ending position of each update area. 
[191 19. The method of claim 17, wherein the information indicating locations of the 

at least one of the plurality of update areas includes a beginning position and a 

size of each update area. 
[201 20. The method of claim 17, wherein the information indicating the locations of 

the at least one of the plurality of update areas includes an ending position and a 

size of each update area. 
[211 21 . The method of claim 16, wherein the recording of the AI canprises: 

recording updated AI indicating a changed update area only when one of the 

pluraUty of update areas, in which the finally updated information is recorded, is 

changed. 

[22] 22. The method of claim 17, wherein the recording of the AI comprises: 

recording the AI including the at least one of the update areas changed or the in- 
formation indicating the location of an added update area when a new update 
area is added to the writeonce disc. 

[23] 23. The method of claim 17, wherein the recording of the AI canprises: 



wo 2005/062306 17 PCT/KR2004/003378 



recording the AI including the information indicating a changed location when 
information indicating the location of the at least one of the plurality of update 
areas is changed. 

[24] 24. The method of claim 16, wherein the recording of the AI conprises: 

repeatedly recording the AI in the AIA. 
[25] 25. The method of claim 1 6, wherein the AI is a flag indicating the update area 

in which the final updated information is recorded. 
[26] 26. The method of claim 16, wherein the plurality of update areas are physical 

areas. 

[27] 27. The method of claim 16, wherein the plurality of update areas are obtained 

by logically dividing a pluraKty of physical areas. 
[28] 28. The method of claim 1 6, wherein the predetermined updated information is a 

temporary disc defect structure (TDDS), and the update area in which the final 

updated infomation is recorded is a temporary disc management area (TDMA). 
[29] 29. The method of claim 16, wherein the write-once disc has a single recording 

layer including a lead-in area, a data area, and a leadout area, and at least one 

AIA is allocated to the leadin area or the lead-out area. 
[30] 30. The method of claim 16, wherein the write-once disc has a double recording 

layer, each recording layer including an inner area, a data area, and an outer area, 

and at least one AIA is allocated to the inner areas or the outer areas. 
[31] 3 1 . An apparatus recording data on a write-once disc, the apparatus canprising: 

a write/read unit writing or reading information on or from the writeonce disc; 

and 

a controller controlling the write/read unit to record predetermined updated in- 
formation in one of a plurality of update areas allocated to the writeonce disc 
and record access infonration (AI) indicating the update area in which final 
updated information is recorded in at least one access information area (AIA) 
allocated to the writeonce disc. 

[32] 32. The apparatus of claim 3 1 , wherein the AI includes the plurality of update 

areas or information indicating locations of the plurality of update areas. 

[33] 33. The apparatus of claim 32, wherein the information indicating the locations 

of the plurality of update areas includes a beginning position and an ending 
position of each update area. 

[34] 34. The apparatus of claim 32, wherein the information indicating the locations 

of the plurality of update areas includes a beginning position and a size of each 



wo 2005/062306 18 PCT/KR2004/003378 



[351 35. The apparatus of claim 32, wherein the infonration indicating the locations 

of the plurality of update areas includes an ending position and a size of each 
update area. 

[36] 36. The apparatus of claim 31, wherein the controller controls the write/read unit 

to write updated AI indicating a changed update area only when the update area 
in which the final updated information is recorded, is changed. 

[37] 37. The apparatus of claim 32, wherein the controller controls the write/read unit 

to write the AI including a nimber of changed update areas or the information 
indicating the location of an added update area when a new update area is added 
to the writeonce disc. 

[38] 38. The apparatus of claim 32, wherein the controller controls the write/read unit 

to write the AI including the information indicating a changed location when the 
information indicating the location of at least one of the plurality of update areas 
is changed. 

[39] 39. The apparatus of claim 3 1 , wherein the controller controls the write/read unit 

to repeatedly write the AI in the ALA. 
[40] 40. The apparatus of claim 3 1 , wherein the AI is a flag indicating an update area 

in which the final updated information is recorded. 
[41] 41. The apparatus of claim 31, wherein the plurality of update areas are physical 

areas. 

[42] 42. The apparatus of claim 3 1 , wherein the plurality of update areas are obtained 

by logically dividing a plurality of physical areas. 

[43] 43 . The apparatus of claim 3 1 , wherein the predetermined updated information is 

a temporary disc defect structure (TDDS), and the update area is a temporary 
disc management area (TDMA). 

[44] 44. The apparatus of claim 3 1 , wherein the writ&once disc is a write-once disc 

having a single recording layer including a lead4n area, a data area, and a lead- 
out area, and the at least one AIA is allocated to the lead4n area or the lead-out 
area. 

[45] 45 . The apparatus of claim 3 1 , wherein the write-once disc is a writeonce disc 

having a double recording layer, each recording layer including an iimer area, a 
data area, and an outer area, and the at least one AIA is allocated to the inner 
areas or the outer areas. 

[46] 46. A method of reproducing a writeonce disc, the method comprising: 



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PCT/KR2004/003378 



obtaining final updated access information (AI) from at least one access in- 
formation area (AIA) allocated to the write-once disc; and 
obtaining information indicating an update area in which the final updated AI is 
recorded among a plurality of update areas allocated to the write-once disc fran 
the final updated AI. 

[47] 47. The method of claim 46, wherein the AI includes the plurality of update 

areas or information indicating locations of the plurality of update areas. 
[48] 48. The method of claim 46, wherein the AI includes information indicating a 

location of the update area in which the final updated AI is recorded. 
[49] 49. The method of claim 48, wherein the information indicating the location of 

the update area in which the final updated AI is recorded includes a beginning 

position and an ending position of the update area. 
[50] 50. The method of claim 46, wherein the plurality of update areas are physical 

areas. 

[51] 51. The method of claim 46, wherein plurality of update areas are obtained by 

logically dividing a plurality of physical areas. 

[52] 52. The method of claim 46, wherein predetermined updated information is a 

temporary disc defect structure (TDDS), and the update area in which the final 
updated AI is recorded is a temporary disc management area (TDMA). 

[53] 53. An apparatus reproducing a writeonce disc, the apparatus ccmprising: 

a reader reading data recorded on the writeonce disc; and 
a controller controlling the reader to obtain final updated access information (AI) 
from at least one access infonration area (AIA) allocated to the write-once disc 
and to obtain information indicating an update area in which the final updated AI 
is recorded among a plurality of update areas allocated to the write-once disc 
fi-on the final updated AI. 

[54] 54. The apparatus of claim 53, wherein the AI includes information indicating a 

location of the update area in which the final updated AI is recorded. 

[55] 55. The apparatus of claim 54, wherein the information indicating the location of 

the update area in which the final updated AI is recorded includes a begiiming 
position and an ending position of the update area. 

[56] 56. The apparatus of claim 54, wherein the plurality of update areas are physical 

areas. 

[57] 57. The apparatus of claim 54, wherein the plurality of update areas are obtained 

by logically dividing a plurality of physical areas. 



wo 2005/062306 



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PCT/KR2004/003378 



[58] 58. The apparatus of claim 54, wherein predetermined updated information is a 

temporary disc defect structure (TDDS), and the update area in which the final 
updated AI is recorded is a temporary disc management area (TDMA). 

[59] 59. The disc of claim 13, wherein the AI includes infonnation indicating a 

location of all TDMAs and infonnation indicating a TDMA in which a final 
TDDS is recorded. 

[60] 60. The disc of claim 59, wherein the information indicating the location of the 

TDMA in which the final TDDS is recorded is an address of a first physical 
sector of a first cluster of the TDMA and an address of a first physical sector of a 
last cluster of the TDMA. 

[61] 61. The disc of claim 13, wherein the TDDS is used as the AI without defining a 

separate data structure of the AI. 

[62] 62. The disc of claim 1, wherein disc access time is reduced by using pre- 

determined update information recorded in a new location. 

[63] 63. The apparatus of claim 43, wherein the TDMA is divided into a plurality of 

virtual TDMAs and the AI is updated when a virtual a virtual TDMA having a 
final TDDS recorded is changed. 



1/9 

WO 2005/062306 PCT/KR2004/003378 









LO 

1 






LEAD-IN 
AREA 


DATA AREA 


LEAD-OUT 
AREA 


LO 

1 


FIG. IB 




INNER 
AREA1 


DATA AREA 1 


OUTER 
AREA1 




INNER 
AREA 2 


DATA AREA 2 


OUTER 
AREA 2 



T 

L1 



wo 2005/062306 



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PCT/KR2004/003378 



FIG. 2 





■ ■ ■ 




DMA2 


LEAD-IN 
AREA 


Recording Condition Test Area 


AIA 




TDMA1 




DMA1 




■ ■ ■ 




Spare Area1 


DATA AREA 


User Data Area 




TDMA2 




Spare Area2 




■ ■ ■ 


LEAD-OUT 
AREA 


DMA3 






DMA4 







wo 2005/062306 



3/9 



PCT/KR2004/003378 





Recording Condition Test Area 




DMAS 1 


TDMA2 1 


DMA7 1 




Spare Area4 | 


TDMA5 1 


User Data Area | 


TDMA4 1 


Spare Area3 




DMA6 1 




DMA5 1 




















QC CM 




























i 


r 














3 QC 








sC 














o< 











CO 


































< 




























FIG. 3A 




DMA2 


Recording Condition Tes 


VIV 


TDMA1 


DMA1 




Spare Areal 


User Data Area 


TDMA3 


Spare Area2 




DMA3 




DMA4 






INNER 
AREA1 


DATA 
AREA1 


OUTER 
AREA1 



wo 2005/062306 



4/9 



PCT/KR2004/003378 



CO 

< 





wo 2005/062306 



PCT/KR2004/003378 



I— ( 



g#3iniiisans 



fr#3iniiisans 



s#3iniiisans 



2#3iniiisflns 



i#3iniiiS8ns 



V \ \ \ \ \ \ \ \ \\ 

^fr#103d3aN\ 



5 §e# 103330 § 



x2# 103330 



© 



wo 2005/062306 



6/9 



PCT/KR2004/003378 



FIG. 6 



Al HEADER 



ACCESS INFORMATION 



Al IDENTIFIER 



Al UPDATA COUNT 



TOTAL NUMBER OF TDMAs 



INFORMATION INDICATING LOCATION OF TDMA 
IN WHICH FINAL TDMS IS RECORDED 



INFORMATION INDICATING LOCATION OF TDMA1 
INFORMATION INDICATING LOCATION 0FTDMA2 
INFORMATION INDICATING LOCATION 0FTDMA3 
INFORMATION INDICATING LOCATION OF TDMA4 
INFORMATION INDICATING LOCATION OF TDMAS 



FIG. 7 



Al Identifier = "Al" 



Al Update count 



INFORMATION INDICATING 
LOCATION OF TDMA IN 
WHICH FINAL TDDS IS RECORDED 

OOh 



ADDRESS OF FIRST 
PHYSICAL SECTOR OF 
FIRST CLUSTER 



ADDRESS OF FIRST 
PHYSICAL SECTOR OF 
LAST CLUSTER 



wo 2005/062306 



7/9 



PCT/KR2004/003378 



FIG. 8 

TDDS#i 



INFORMATION INDICATING 




ADDRESS OF FIRST 


ADDRESS OF FIRST 


LOCATION OFTDMA IN 




PHYSICAL SECTOR OF 


PHYSICAL SECTOR OF 


WHICH FINAL TDDS IS 




FIRST CLUSTER 


LAST CLUSTER 


RECORDED 




(4 BYTES) 


(4 BYTES) 



FIG. 9 



TDDS#i 



INFORMATION INDICATING 
LOCATION OF TDMA2 



INFORMATION INDICATING 
LOCATION OF TDMA3 



INFORMATION INDICATING 
LOCATION 0FTDMA4 



FLAG INDICATING LOCATION 
OFTDMA IN WHICH FINAL 
TDDS IS RECORDED 



b7TOb5 


b4TObO 


RESERVED 


FLAG INFORMATION 



8/9 



WO 2005/062306 



FIG. 10 



VIRTUAL TDMA1 
(K CLUSTERS) 

VIRTUAL TDMA2 
(K CLUSTERS) 



VIRTUAL TDMA #N 
(K CLUSTERS) 



VIRTUAL TDMA #L 
(K CLUSTERS) 



FIG. 11 



INPUT 



<^ 

V\/RITE/READ 
UNIT 



t /-^^ 

CONTROLLER 




wo 2005/062306 



9/9 



PCT/KR2004/003378 



FIG. 12 



(start) 



WRITE DATA ON WRITE-ONCE DISC — 71 



NO 



IS 

TNFORMATION TO BE UPDATED" 
GENERATED? 



-73 



lYES 



WRITE UPDATE INFORMATION IN ONE 
OF PLURALITY OF UPDATE AREAS 



-75 



YES 



IS THERE 
ANY RECORDING 
OPERATION? 



-77 



NO 



NO 



IS IT NECESSARY 
TO UPDATE Al? 



-79 



, YES 



UPDATE Al 



— 81 



( END } 



INTERNATIONAL SEARCH REPORT 



International application No. 
PCT/KR2004/003378 



A. CLASSIFICATION OF SUBJECT MATTER 

IPC7 GllB 20/12 

According to International Patent Classification (IPC) or to both national classification and IPC 

B. FIELDS SEARCHED 

Minimum documentation searched (classification system followed by classification symbols) 
GllB 20/12 0113 20/10 GllB 7/00 GllB 7/007 

Dociunentation searched other than minimum documentation to the extent that such documents are included in the fields searched 



Electronic data base consulted during the intertnational search (name of data base and, where practicable, search terms used) 
WH, PAJ "AIA(access information area), write-once, disc, update, TDDS(temporaTy disc defect structure), TDMA(temporaiy disc 
management area)" 



C. DOCUMENTS CONSIDERED TO BE RELEVANT 



Citation of document, with indication, where appropriate, of the relevant passages 



Relevant to claim No. 



JP-2003-317387A (MATSUSHITA ELECTRIC IND CO., LTD.) 07 November 2003 
' See the whole document 



JP 2003-333522 A (VICTOR CO OF JAPAN LTD.) 21 Novraiber2ap3 
See flie whole document • 



IP 09-139022 A (FUJITSU TEN LTD.) 27 May 1999 
See the whole document 



US 2004-185216 Al (SAMSUNG ELECTRONICS CO., LTD.) 23 September 2004 
See the whole document 



WO 2004-049332 Al (SONY CORPORATION) 10 June 2004 
See the whole document 



1, 16, 31, 46, 53 
1,16, 3,1, 46; 53 
.1, 16, 31, 46, 53 
1,16,31,46,53 
1, 16,31,46,53 



I I Further documents are listed in the continuation of Box C. 



I I See patent family annex. 



Special categories of cited documents: 
document defining the general state of the art which is 
to be of particular relevance 

earlier application or patent but publislied on or after the mtemational 
filing date 

document which may throw doubts on priority claim(s) or which is 
cited to establish the publioarion date of citation or other 
special reason (as specified) 

document referring to an oral disclosure, use, exhibition or other 
al filing date but later 



"T" later document published after the international filing date oi priority 
date and not in conflict with the application but cited to understand 
the principle or theory underlying the invention 
"X" document of particular relevance; the claimed invention cannot be 
considered novel or cannot be considered to involve an inventive 
step when the document is taken alone 
"Y" document of particular relevance; the claimed invention cannot be 
considered to involve an inventive step when the document is 
combined with one or more other such documents,such ( 
being obvious to a person skilled in the art 
t member of the same patent family 



Date of the actual completion of the international search 
29 MARCH 2005 (29.03.2005) 


Date of mailing of the international search report 

29 MARCH 2005 (29.03.2005) 


Name and mailing address of the ISA/KR 

jflHk Korean Intellectual Property Office 

m 920 Dunsan-dong, Seo-gu, Daejeon 302-701, 

m.jpr Republic of Korea 

Facsimile No. 82-42-472-7140 


Authorized officer 

KIM,YongWoong (v^»B«*6) 
Telephone No. 82-42-481-5698 ^kJz^J^ 



Form PCT/ISAy210 (second sheet) (January 2004)