EP0258059A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Optical recording methods for sampled servo formats
Assignee: Sony Corp
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Filing: 1987-08-27
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Granted: —
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Expires: 2007-08-27
Abstract
Abstract A method of optically recording data in data areas (4) of a disc-like recording medium (1) in which servo signal areas (3) are formed along a track (2) in alternation with the data areas (4). Parity codes (C₁,C₂) for error correction are generated and affixed in at least one direction, that is, in the column or row direction, of a two-dimensionally arrayed data block, and the two-dimensionally arrayed data with the affixed parity codes (C₁,C₂) are supplied sequentially to an optical pickup along one of the column and row directions so as to be recorded in respective ones of the data areas (4). The number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area (4) provided on the recording medium (1), when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area (4) is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.
Inventors
- 👤 Yoichiro C/O Patents Division Sako
- 👤 Hiroshi C/O Patents Division Ogawa
- 👤 Yoshihiro C/O Patents Division Tsukamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:42
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1806; G11B20/1809
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
213 words
An optical recording method for a sampled servo format, the method comprising: generating and adding parity data (C₁) along at least one direction of a two-dimensionally arrayed block of data supplied for recording, said parity data (C₁) being used for correcting a possible error in said block of data; and serially reading said two-dimensionally arrayed data and said added parity data (C₁) in another direction, orthogonal to said one direction, and recording the read-out data in respective data areas (4), each of which is capable of recording a prescribed number of data, and which are formed alternately with servo signal areas (3) along each track (2) on a disc-like recording medium (1); wherein the number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area (4) provided on said disc-like recording medium (1), when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area (4) relates to or is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.
Claim 2
Dependent Claim
213 words
An optical recording method for a sampled servo format, the method comprising: generating and adding parity data (C₁) along at least one direction of a two-dimensionally arrayed block of data supplied for recording, said parity data (C₁) being used for correcting a possible error in said block of data; and serially reading said two-dimensionally arrayed data and said added parity data (C₁) in another direction, orthogonal to said one direction, and recording the read-out data in respective data areas (4), each of which is capable of recording a prescribed number of data, and which are formed alternately with servo signal areas (3) along each track (2) on a disc-like recording medium (1); wherein the number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area (4) provided on said disc-like recording medium (1), when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area (4) relates to or is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.
Claim 3
Dependent Claim
37 words
A method according to claim 1, wherein said integer is 1, 2, 3, or 4 on the condition that the number of data in said other direction of said two-dimensionally arrayed data is equal to an integer.
Claim 4
Dependent Claim
41 words
A method according to claim 1 or claim 2, wherein further parity data (C₂) is generated and included in said two-dimensionally arrayed data for correcting possible errors of the block of data in said other direction of the two-dimensionally arrayed data.
Claim 5
Dependent Claim
66 words
A method according to claim 1 or claim 2, wherein, for harmonising the servo characteristics with the effect of interleaving on burst errors, the number of data in said other direction of said two-dimensionally arrayed data is selected to be 4, 8, 16, 32 or 48 bytes when the number of data that can be recorded in each data area (4) is equal to 16 bytes.
Claim 6
Dependent Claim
71 words
A method according to claim 3, wherein, for harmonising the servo characteristics with the error correcting ability of the further parity data (C₂) generated and added in said other direction of said two-dimensionally arrayed data, the number of data in said other direction is set so as to be equal to 48 bytes when the number of data that can be recorded in each data block is equal to 16 bytes.
Claim 7
Dependent Claim
36 words
A method according to claim 1, claim 2 or claim 4, wherein the number of the parity data (C₁) generated and added along the one direction of said two-dimensionally arrayed data is equal to 16 bytes.
Claim 8
Dependent Claim
51 words
A method according to claim 3 or claim 5, wherein the number of the parity data (C₁) generated and added in the one direction of said two-dimensionally arrayed data is 2 bytes and the number of the further parity data (C₂) generated and added in the other direction is 4 bytes.
Claim 9
Dependent Claim
256 words
An optical recording method for a sampled servo format of the type wherein a prescribed number of data to which symbols for error correction are added is serially recorded optically in each data area (4) of a disc-like recording medium (1) and in which servo signal areas (3) are formed along each of a number of tracks (2) alternately with said data areas (4) each capable of recording a prescribed number of data, the method comprising the steps of: generating and adding parity data (C₁) along at least one direction of a two-dimensionally arrayed block of data supplied for recording, said parity data (C₁) being used for correcting a possible error in said block of data; and sequentially, serially reading said two-dimensionally arrayed data and said added parity data (C₁) in another direction, orthogonal to said one direction, and recording the read-out data in respective data areas (4) provided on said disc-like recording medium (1); wherein the number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area (4) provided on said disc-like recording medium (1), when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area (4) relates to or is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.
Claim 10
Dependent Claim
256 words
An optical recording method for a sampled servo format of the type wherein a prescribed number of data to which symbols for error correction are added is serially recorded optically in each data area (4) of a disc-like recording medium (1) and in which servo signal areas (3) are formed along each of a number of tracks (2) alternately with said data areas (4) each capable of recording a prescribed number of data, the method comprising the steps of: generating and adding parity data (C₁) along at least one direction of a two-dimensionally arrayed block of data supplied for recording, said parity data (C₁) being used for correcting a possible error in said block of data; and sequentially, serially reading said two-dimensionally arrayed data and said added parity data (C₁) in another direction, orthogonal to said one direction, and recording the read-out data in respective data areas (4) provided on said disc-like recording medium (1); wherein the number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area (4) provided on said disc-like recording medium (1), when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area (4) relates to or is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.
References Cited (Backward Citations)
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