Source: http://www.google.com/patents/US20050060489?dq=6,275,983
Timestamp: 2017-10-18 06:51:44
Document Index: 390964155

Matched Legal Cases: ['Application No. 10', 'art 31', 'art 31', 'art 31', 'art 31', 'art 31', 'art 31', 'art 31', 'art 31']

Patent US20050060489 - Write-once optical disc, method and apparatus for recording management ... - Google Patents
A write-once optical disc, and a method and apparatus for recording management information on the write-once optical disc, are provided. The optical disc includes at least one recording layer, and at least one SRR entry. Each SRR entry corresponds to an SRR and includes at least one status field for...http://www.google.com/patents/US20050060489?utm_source=gb-gplus-sharePatent US20050060489 - Write-once optical disc, method and apparatus for recording management information on write-once optical disc
Publication number US20050060489 A1
Application number US 10/887,905
Also published as CA2532371A1, CA2532371C, DE602004020992D1, EP1644920A1, EP1644920B1, EP2096641A2, EP2096641A3, US7372792, US7542389, US20080186814, WO2005006314A1
Publication number 10887905, 887905, US 2005/0060489 A1, US 2005/060489 A1, US 20050060489 A1, US 20050060489A1, US 2005060489 A1, US 2005060489A1, US-A1-20050060489, US-A1-2005060489, US2005/0060489A1, US2005/060489A1, US20050060489 A1, US20050060489A1, US2005060489 A1, US2005060489A1
Inventors Yong Park
Original Assignee Park Yong Cheol
Patent Citations (6), Referenced by (97), Classifications (10), Legal Events (3)
Write-once optical disc, method and apparatus for recording management information on write-once optical disc
US 20050060489 A1
A write-once optical disc, and a method and apparatus for recording management information on the write-once optical disc, are provided. The optical disc includes at least one recording layer, and at least one SRR entry. Each SRR entry corresponds to an SRR and includes at least one status field for indicating a recording status of the corresponding SRR. The status field includes a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs. Each SRR entry further includes a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR.
at least one SRR entry, each SRR entry corresponding to an SRR and including at least one status field for indicating a recording status of the corresponding SRR, the at least one status field including a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs,
each SRR entry further including a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR.
2. The recording medium of claim 1, wherein each SRR entry consists of a 64-bit sequence with most significant bit being the first bit in the 64-bit sequence.
3. The recording medium of claim 1, wherein the at least one status field includes an SRR status field having a size of 4 bits, and the session start flag has a size of 1 bit.
4. The recording medium of claim 3, wherein, for each SRR entry, one of the four bits of the SRR status field is used as the session start flag.
5. The recording medium of claim 1, wherein each of the start address field and the last address field has a size of 28 bits.
6. The recording medium of claim 1, wherein the start address field precedes the last address field.
7. The recording medium of claim 6, wherein the at least one status field precedes the last address field.
8. The recording medium of claim 1, wherein the at least one status field further includes:
an SRR type field for indicating a type of the corresponding SRR.
9. The recording medium of claim 8, wherein the SRR type field has a size of 3 bits.
10. The recording medium of claim 8, wherein the SRR type field indicates whether the corresponding SRR is an opened SRR or a closed SRR.
11. The recording medium of claim 10, wherein the SRR type field further indicates whether the corresponding SRR is a closed due to padding or without any padding.
12. The recording medium of claim 8, wherein the SRR type field indicates that the corresponding SRR is one of the following:
an opened, invisible SRR;
an opened, incomplete SRR;
an opened, empty SRR;
an opened, partially recorded SRR;
a closed, empty SRR;
a closed, partially recorded SRR;
a closed, complete SRR with padded data; and
a closed, complete SRR without padded data.
13. The recording medium of claim 8, wherein the SRR type field indicates that the corresponding SRR is one of the following:
an opened SRR;
an opened empty SRR or an opened, partially recorded SRR; and
a closed, complete SRR.
14. The recording medium of claim 1, wherein the at least one status field further includes:
an open/close flag for indicating whether the corresponding SRR is an opened SRR or a closed SRR.
15. The recording medium of claim 14, wherein the open/close flag has a size of 1 bit.
16. The recording medium of 14, wherein the at least one status field further includes:
a padding flag for indicating whether or not the corresponding SRR is padded.
17. The recording medium of claim 16, wherein the padding flag has a size of 2 bits.
18. The recording medium of claim 16, wherein the padding flag indicates that the corresponding SRR is one of the following:
a close SRR with padding; and
a closed SRR without padding.
19. The recording medium of claim 1, wherein the at least one SRR entry forms an SRR entry list, the SRR entry list being sorted in a predetermined order.
20. The recording medium of the claim 19, wherein a criterion for sorting the SRR entry list in the predetermined order is the start address field.
21. The recording medium of claim 8, wherein the at least one SRR entry forms an SRR entry list, the SRR entry list being sorted in a predetermined order, a criterion for sorting the SRR entry list in the predetermined order being the SRR type field.
22. The recording medium of claim 1, wherein one of the at least one status field is reserved for a subsequent use.
23. The recording medium of claim 1, wherein the at least one SRR entry is stored in a temporary defect management area designated on the at least one recording layer.
24. The recording medium of claim 1, wherein the recording medium is a write-once optical disc.
25. A method for recording management information on a recording medium having at least one recording layer, the method comprising:
recording at least one SRR entry on the at least one recording layer, each SRR entry corresponding to an SRR and including at least one status field for indicating a recording status of the corresponding SRR, the at least one status field including a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs, each SRR entry further including a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR.
26. The method of claim 25, wherein in the recording step, each SRR entry consists of a 64-bit sequence with most significant bit being the first bit in the 64-bit sequence.
27. The method of claim 25, wherein in the recording step, the at least one status field includes an SRR status field having a size of 4 bits, and the session start flag has a size of 1 bit.
28. The method of claim 27, wherein, for each SRR entry, one of the four bits of the SRR status field is used as the session start flag.
29. The method of claim 25, wherein in the recording step, each of the start address field and the last address field has a size of 28 bits.
30. The method of claim 25, wherein the start address field precedes the last address field.
31. The method of claim 30, wherein the at least one status field precedes the last address field.
32. The method of claim 25, wherein in the recording step, the at least one status field further includes:
33. The method of claim 32, wherein the SRR type field has a size of 3 bits.
34. The method of claim 32, wherein the SRR type field indicates whether the corresponding SRR is an opened SRR or a closed SRR.
35. The method of claim 34, wherein the SRR type field further indicates whether the corresponding SRR is a closed due to padding or without any padding.
36. The method of claim 32, wherein the SRR type field indicate that the corresponding SRR is one of the following:
37. The method of claim 32, wherein the SRR type field indicates that the corresponding SRR is one of the following:
38. The method of claim 35, wherein in the recording step, the at least one status field further includes:
39. The method of claim 38, wherein the open/close flag has a size of 1 bit.
40. The method of 38, wherein in the recording step, the at least one status field further includes:
41. The method of claim 40, wherein the padding flag has a size of 2 bits.
42. The method of claim 40, wherein the padding flag indicates that the corresponding SRR is one of the following:
43. The method of claim 25, wherein the at least one SRR entry forms an SRR entry list, and the method further comprises:
sorting the SRR entry list in a predetermined order.
44. The method of the claim 43, wherein in the sorting step, a criterion for sorting the SRR entry list in the predetermined order is the start address field.
45. The method of claim 32, wherein the at least one SRR entry forms an SRR entry list, and the method further comprises:
sorting the SRR entry list in a predetermined order based on the SRR type field.
46. The method of claim 25, wherein in the recording step, one of the at least one status field is reserved for a subsequent use.
47. The method of claim 25, wherein the at least one SRR entry is stored in a temporary defect management area designated on the at least one recording layer.
48. The method of claim 25, wherein in the recording step, the recording medium is a write-once optical disc.
49. An apparatus for recording management information on a recording medium having at least one recording layer, the apparatus comprising:
a recording/reproducing part to record at least one SRR entry on the at least one recording layer, each SRR entry corresponding to an SRR and including at least one status field for indicating a recording status of the corresponding SRR, the at least one status field including a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs, each SRR entry further including a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR.
This application claims the priority benefit of the Korean Patent Application No. 10-2003-0047989 filed on Jul. 14, 2003 and No. 10-2003-0062379 filed on Sep. 6, 2003. The entire contents of each of these applications are hereby incorporated by reference.
The present invention relates to a write-once optical disc and a method and apparatus for recording management information on the write-once optical disc.
Referring to FIG. 1, the management information of the DVD-R is recorded in a recording management data (RMD) area. Particularly, the recording status information of the DVD-R is managed using RMD fields 4-12 of the RMD area. There are an open RZone, an invisible RZone and a closed RZone.
Accordingly, there is a need for a method of managing the recording status of a high density write-once optical disc such as a BD-WO, so that the disc can be accessed easily and used more effectively. And such management information should be structured to ensure compatibility with the overall structure, use and standards of the BD-WO.
Accordingly, the present invention is directed to a write-once optical disc, and a method and apparatus for recording management information on the write-once optical disc, which substantially obviate one or more problems due to limitations and disadvantages of the related art.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a recording medium comprising: at least one recording layer; and at least one SRR entry, each SRR entry corresponding to an SRR and including at least one status field for indicating a recording status of the corresponding SRR, the at least one status field including a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs, each SRR entry further including a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR.
In another aspect of the present invention, there is provided an apparatus for recording management information on a recording medium having at least one recording layer, the apparatus comprising: a recording/reproducing unit to record at least one SRR entry on the at least one recording layer, each SRR entry corresponding to an SRR and including at least one status field for indicating a recording status of the corresponding SRR, the at least one status field including a session start flag for indicating whether the corresponding SRR is a start of a session, the session being formed by a group of the SRRs, each SRR entry further including a start address field indicating where the corresponding SRR starts, and a last address field indicating the last recorded address of the corresponding SRR. It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
FIG. 6 illustrates an SRR entry recordable on a write-once optical disc according to a first embodiment of the present invention;
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used throughout the drawings to refer to the same or like parts. For the convenience of description, a write-once Blu-ray disc (BD-WO) will be described as an example.
In this specification, the terminology of the present invention employs generally popularized terms if possible. However, in a specific case, terms are arbitrarily selected by the inventor(s). In this case, since the meanings of the terms are defined in detail in the corresponding descriptions, it is understood that the invention should be understood with the defined meanings of the terms, if defined in the specification.
According to the present invention, a plurality of areas are formed or reserved in a write-once optical disc so that these areas can be recorded with detailed information. Each of these special recording areas is called a sequential recording range (SRR). Information on the recording status (recording status information or disc recording status information) of a write-once optical disc such as a BD-WO is called an SRR information (SRRI), similar to the use of the term “sequence recording” in the sequence recording mode of a BD. “Padding” means recording dummy data, zero values, or some other designated padding data to an unrecorded or empty area in a closed SRR in response to the request of a user or according to the determination of a recording/reproducing unit (e.g., unit 10 shown in FIG. 17). “Session” is a common name used to divide the SRRs for compatibility according to the specification for reproduction. One session includes at least one SRR.
Generally, there are three types of sessions according to the present invention. The first session type is an empty session made up of invisible SRRs. The second session type is an incomplete session that has at least one opened SRR, but no invisible SRR. The third session type is a complete session made up of closed SRRs. A session has at least one SRR. An incomplete session is changed into a complete session, e.g., due to a session close command.
Alternatively, in FIG. 4G, a session close command is received and processed to close the session without padding the unrecorded area(s). The recorded area then becomes an independent complete session #2 due to the session close command, where all the SRRs in this session are changed into closed SRRs. In other words, as a result of performing the padding operation, the three kinds of complete SRRs #2, #3 and #4 are reserved on the disc as part of the complete session #2. The complete SRR #2 is the opened partially recorded SRR of FIG. 4E that is changed into a closed SRR after padding. The complete SRR #3 is the opened empty SRR of FIG. 4E that is changed into a closed SRR after padding. The complete SRR #4 is a closed SRR having actual user data normally recorded therein. The remaining outmost SRR is an opened invisible SRR #5 which is part of an empty session #3.
Referring to FIG. 5, the disc includes a lead-in area, a data area, and a lead-out area, all at the recording layer. The lead-in and lead-out areas have a plurality of defect management areas (DMA1-DMA4) for storing the same defect management information repeatedly. In the data area, an inner spare area ISA0 and/or an outer spare area OSA0 for replacing defective areas is provided.
In each of the PTDMAO and ATDMAO, temporary defect list (TDFL) information and temporary disc definition structure (TDDS) information are recorded in one record unit (e.g., one cluster in case of a BD-WO). In the alternative, in each of the PTDMA0 and ATDMA0, (TDFL+TDDS) information or (SRRI and TDDS) information can be recorded in another record unit.
Referring to FIG. 7A, the SRR #1 is a complete SRR without padding and this status is indicated with “0111b” in the Status field 31. The SRR #2 is a closed partially recorded SRR without padding and this status is indicated with “0101b” in the Status field 31. The SRR #3 is a closed empty SRR without padding and this status is indicated with “0100b” in the Status field 31. The SRR #4 is a complete SRR without padding and this status is indicated with “0111b” in the Status field 31. The SRR #5 is an invisible SRR and this status is indicated with “0000b” in the Status field 31.
For instance, if the Status field 31 has a value “0000b,” it means the corresponding SRR is an opened SRR and can be any one kind of opened SRRs shown in FIGS. 2A-2D. If the Status field 31 has a value “0010b,” it means the corresponding SRR is a closed empty SRR with padding or a closed partially recorded SRR as shown in FIGS. 3A and 3B. If the status field 31 has a value “0100b,” it means the corresponding SRR is a complete SRR including the case in which data is fully recorded as shown FIG. 3C or the case in which the recording is completed with padding as shown in FIG. 3D or 3E.
Referring to FIG. 9A, the SRR #1 is a complete SRR and this status is indicated with “0100b” in the Status field 31. The SRR #2 is a closed partially recorded SRR without padding and this status is indicated with “0010b” in the Status field 31. The SRR #3 is a closed empty SRR without padding and this status is indicated with “0010b” in the Status field 31. The SRR #4 is a complete SRR and this status is indicated with “0100b” in the Status field 31. The SRR #5 means an invisible SRR and this status is indicated with “0000b” in the Status field 31.
FIG. 10 illustrates an SRR entry according to a third embodiment of the present invention. Similar to the first embodiment of FIG. 6, this embodiment provides the SRR type information in the Status field 31. But it further provides session information in the Status field 31. Since the basic structure of the SRR entry in this third embodiment is the same as the first embodiment of FIG. 6, the description corresponding to the same features of the SRR entry (as represented by the use of the same or like reference numerals) will be omitted.
If the second part 31 b (the three remaining bits) of the Status field 31 has a value “000b,” it means the corresponding SRR is an opened invisible SRR, e.g., as shown in FIG. 2A. If the second part 31 b has a value “001b,” it means the corresponding SRR is an opened incomplete SRR, e.g., as shown in FIG. 2B. If the second part 31 b has a value “010b,” it means the corresponding SRR is an opened empty SRR, e.g., as shown in FIG. 2C. If the second part 31 b has a value “100b,” it means the corresponding SRR is an opened partially recorded SRR, e.g., as shown in FIG. 2D. If the second part 31 b has a value “100b,” it means the corresponding SRR is a closed empty SRR, e.g., as shown in FIG. 3A. If the second part 31 b has a value “101b,” it means the corresponding SRR is a closed partially recorded SRR, e.g., as shown in FIG. 3B. If the second part 31 b has a value “110b,” it means the corresponding SRR is a closed complete SRR with padding, e.g., as shown in FIGS. 3D and 3E. If the second part 31 b has a value “111b,” it means the corresponding SRR is a closed complete SRR without padding, e.g., as shown in FIG. 3C.
Referring to FIG. 11A, since the SRR #1 is a complete SRR without padding and also is the start SRR of the session #1, this status is indicated with “1111b” in the Status field 32. That is, this four-bit Status field 31 includes the one-bit session flag (31 a) and the remaining three-bits SRR type information (31 b) as discussed above. Since the SRR #2 is a closed partially recorded SRR without padding and also is the start SRR of the session #2, this status is indicated with “1101b” in the Status field 31. Since the SRR #3 is a closed empty SRR without padding but is not the start SRR of the session #2, this status is indicated with “0100b” in the Status field 31. Since the SRR #4 is a complete SRR without padding but is not the start SRR of the session #2, this status is indicated with “0111b” in the Status field 31. Since the SRR #5 is an invisible SRR and also is the start SRR of the session #3, this status is indicated with “1000b” in the Status field 31.
On the other hand, referring to FIG. 11B, since the SRR #1 is a complete SRR without padding and also is the start SRR of the session #1, this status is indicated with “1111b” in the Status field 31. Since the SRR #2 is a complete SRR with padding and also is the start SRR of the session #2, this status is indicated with “1110b” in the Status field 31. Since the SRR #3 is a complete SRR with padding but is not the start SRR of the session #2, this status is indicated with “0110b” in the Status field 31. Since the SRR #4 is a complete SRR without padding but is not the start SRR of the session #2, this status is indicated with “0111b” in the Status field 31. Since the SRR #5 is an invisible SRR and also is the start SRR of the session #3, this status is indicated with “1000b” in the Status field 31.
Referring to FIG. 13A, since the SRR #1 is a complete SRR and also is the start SRR of the session #1, this status is indicated with “1100b” in the Start field 31. Since the SRR #2 is a closed partially recorded SRR without padding and also is the start SRR of the session #2, this status is indicated with “1010b” in the Status field 31. Since the SRR #3 is a closed empty SRR without padding but is not the start SRR of the session #2, this status is indicated with “0010b” in the Status field 31. Since the SRR #4 is a complete SRR but is not the start SRR of the session #2, this status is indicated with “0100b” in the Status field 31. Since the SRR #5 is an opened invisible SRR and also is the start SRR of the session #3, this status is indicated with “1000b” in the Status field 31.
The first heading bit b63 (31 a) of the Status field 31 is designated to carry the S-flag information indicating whether the corresponding SRR is the start of a session. The use and definition of the S-flag information here is the same as the S-flag information (31 a) in the previous embodiments. One next bit b62 (31 c) is designated as the open/close flag indicating whether the corresponding SRR is an opened SRR or a closed SRR. The two remaining bits b61 and b60 (31 d) of the Status field 31 are designated as a padding flag indicating whether or not the closed SRR is padded.
Referring to FIG. 16, the n-th recorded SRR information is verified to record the (n+1)-th updated SRR information. The n-th recorded SRR information and the (n+1)-th SRR information to be updated currently are collected together and sorted in a specific order. Then the sorted SRRI is recorded on the disc. In the same manner, the (n+1)-th recorded SRR information is verified to record the (n+2)-th updated SRR information. The (n+1)-th recorded SRR information and the (n+2)-th SRR information to be updated currently are collected together and sorted in a specific order. The sorted SRRI information is recorded on the disc.
As an example, as for the sorting order, the SRR type information (status) identifying the SRR type of an SRR entry is the first criteria by which the sorting occurs. Then among the same SRR types, the start address of the SRRs is used as the second criteria to sort. However, as for the sorting order, how to determine the sorting criterion is a selection problem and various selections can be made according to a system or a designer.
An optical disc recording/reproducing process will be described according to the present invention. When the optical disc such as a BD-WO is loaded in the recording/reproducing apparatus such as the apparatus of FIG. 17, SRR information is read as the recent disc management information recorded in a predetermined management area such as a TDMA in the disc. The SRR header and SRR entry recorded in the SRR information are read and are temporarily recorded in the memory 15 of the recording/reproducing unit 10. The recent disc recording status is represented in the stored SRR information. As discussed above, the disc recording status for the entire area of the disc, and the existence and location of a specific session can be confirmed from the SRR type information and the LRA information in each SRR. As a result, the use of the SRRI as defined according to the present invention is advantageous and effective.
For instance, since the microcomputer 16 can confirm exactly the SRR type existing in the disc from the SRR information, the recordable NWA can be identified from the confirmed opened SRR. From the confirmed closed SRR, it can be confirmed whether or not the SRR is padded. If the SRR is closed without padding, the corresponding area may be padded, so that the unrecorded area can be cleared.
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U.S. Classification 711/112, G9B/27.052, G9B/27.05
International Classification G11B27/36, G11B27/32
Cooperative Classification G11B2220/2537, G11B27/36, G11B27/329
European Classification G11B27/36, G11B27/32D2
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PARK, YONG CHEOL;REEL/FRAME:015568/0794