Information storage medium, information recording apparatus, and information reproduction apparatus
First Claim
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1. An information recording apparatus for recording information on an information storage medium, comprising:
- a generator generating predetermined data; and
a recorder recording the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule, the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces 0s successively arranged, the predetermined data includes a plurality of SYNC codes in predetermined recording units, a number of 1s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number, each of the plurality of SYNC codes includes a fixed code and a variable code, wherein the fixed code includes k or more sequences of 0s successively arranged and d+1 sequences of 0s successively arranged, wherein the variable code is one of a first pattern, a second pattern and a pattern other than the first pattern and second pattern, wherein the variable code of the lead of the SYNC codes in the predetermined recording units is the first pattern, combinations of the variable codes of three successive SYNC codes in the predetermined recording units are different from one another, and data in an ECC block is interleaved in two small ECC blocks, the predetermined recording units are generated based on the interleaved data in the two small ECC blocks, each of the predetermined recording units is called one sector, a Parity of Outer-code (PO) is arranged in a last row of said one sector, and data and a Parity of Inner-code (PI) are arranged in the other rows in said one sector.
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Abstract
An information storage medium according to an embodiment of this invention has an area for storing predetermined data modulated according to the (d, k; m, n) modulation rule. The predetermined data includes at least one SYNC code in a predetermined recording unit, and the number of “1”s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number.
11 Citations
13 Claims
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1. An information recording apparatus for recording information on an information storage medium, comprising:
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a generator generating predetermined data; and
a recorder recording the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule,the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces 0s successively arranged,the predetermined data includes a plurality of SYNC codes in predetermined recording units, a number of 1s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number, each of the plurality of SYNC codes includes a fixed code and a variable code, wherein the fixed code includes k or more sequences of 0s successively arranged and d+1 sequences of 0s successively arranged, wherein the variable code is one of a first pattern, a second pattern and a pattern other than the first pattern and second pattern, wherein the variable code of the lead of the SYNC codes in the predetermined recording units is the first pattern, combinations of the variable codes of three successive SYNC codes in the predetermined recording units are different from one another, and data in an ECC block is interleaved in two small ECC blocks, the predetermined recording units are generated based on the interleaved data in the two small ECC blocks, each of the predetermined recording units is called one sector, a Parity of Outer-code (PO) is arranged in a last row of said one sector, and data and a Parity of Inner-code (PI) are arranged in the other rows in said one sector. - View Dependent Claims (2, 3)
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4. An information reproduction apparatus for reproducing information from an information storage medium, comprising:
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a reader reading out predetermined data from the information storage medium, and a reproducer reproducing various data on the basis of a SYNC code contained in the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule,the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces of 0s successively arranged,the predetermined data includes plurality of SYNC codes in predetermined recording units, a number of 1s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number, each of the plurality of SYNC codes includes a fixed code and a variable code, wherein the fixed code includes k or more sequences of 0s successively arranged and d+1 sequences of 0s successively arranged, wherein the variable code is one of a first pattern, a second pattern and a pattern other than the first pattern and second pattern, combinations of the variable codes of three successive SYNC codes in the predetermined recording units are different from one another, and data in an ECC block is interleaved in two small ECC blocks, the predetermined recording units are generated based on the interleaved data in the two small ECC blocks, each of the predetermined recording units is called one sector, a Parity of Outer-code (PO) is arranged in a last row of said one sector, and data and a Parity of Inner-code (PI) are arranged in the other rows in said one sector. - View Dependent Claims (5, 6)
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7. An information recording method for recording information on an information storage medium, comprising;
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generating predetermined data; and
recording the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule,the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces 0s successively arranged,the predetermined data includes a plurality of SYNC codes in predetermined recording units, a number of 1s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number, each of the plurality of SYNC codes includes a fixed code and a variable code, wherein the fixed code includes k or more sequences of 0s successively arranged and d+1 sequences of 0s successively arranged, wherein the variable code is one of a first pattern, a second pattern and a pattern other than the first pattern and second pattern, wherein the variable code of the lead of the SYNC codes in a predetermined recording units is the first pattern, combinations of the variable codes of three successive SYNC codes in the predetermined recording units are different from one another, and data in an ECC block is interleaved in two small ECC blocks, the predetermined recording units are generated based on the interleaved data in the two small ECC blocks, each of the predetermined recording units is called one sector, a Parity of Outer-code (PO) is arranged in a last row of said one sector, and data and a Parity of Inner-code (PI) are arranged in the other rows in said one sector. - View Dependent Claims (8, 9)
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10. An information reproduction method for reproducing information from an information storage medium, comprising:
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reading out predetermined data from the information storage medium, and reproducing various data on the basis of a SYNC code contained in the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule,the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces of 0s successively arranged,the predetermined data includes plurality of SYNC codes in predetermined recording units, a number of 1s included in a predetermined number of a series of channel bits at an arbitrary position in the SYNC code is not more than a half the predetermined number, each of the plurality of SYNC codes includes a fixed code and a variable code, wherein the fixed code includes k or more sequences of 0s successively arranged and d+1 sequences of 0s successively arranged, wherein the variable code is one of a first pattern, a second pattern and a pattern other than the first pattern and second pattern, combinations of the variable codes of three successive SYNC codes in the predetermined recording units are different from one another, and data in an ECC block is interleaved in two small ECC blocks, the predetermined recording units are generated based on the interleaved data in the two small ECC blocks, each of the predetermined recording units is called one sector, a Parity of Outer-code (PO) is arranged in a last row of said one sector, and data and a Parity of Inner-code (PI) are arranged in the other rows in said one sector. - View Dependent Claims (11, 12)
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13. An information recording method for recording information on an information storage medium, comprising;
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generating predetermined data; and
recording the predetermined data, wherein a part of the predetermined data is modulated according to a (d, k;
m, n) modulation rule,the (d, k;
m, n) modulation rule modulates m-bit source data into n-channel bit data, so that modulated channel bit patterns satisfy conditions that a minimum of d pieces of 0s successively arranged and a maximum of k pieces 0s successively arranged, andthe predetermined data includes a plurality of SYNC codes in predetermined recording units.
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Specification