发明名称 |
REVERSE CONCATENATION FOR PRODUCT CODES |
摘要 |
<p>A system, method and computer program product are provided to encode data for recording onto media whereby modulation and linear constraints from a concatenated code or product code are imposed. A first array of unencoded user data is generated. Each row is modulation encoded to enforce a first modulation constraint; the array is transformed into a second array which is transformed into a third array having predetermined empty locations in each column interleaved with the modulated data. A C2-parity byte is computed for at least some of the empty locations of the third array and a fourth array is generated. C1-parity symbols in each row are computed, generating a fifth array. A second modulation constraint is enforced on each C1-parity symbol in each row of the fifth array, generating a sixth array. The rows of the sixth array are assembled with header and sync fields for recording onto a recording media.</p> |
申请公布号 |
EP2140452(A1) |
申请公布日期 |
2010.01.06 |
申请号 |
EP20080709262 |
申请日期 |
2008.02.29 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
ELEFTHERIOU, EVANGELOS;HUTCHINS, ROBERT;MITTELHOLZER, THOMAS;SEGER, PAUL |
分类号 |
G11B20/18 |
主分类号 |
G11B20/18 |
代理机构 |
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代理人 |
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地址 |
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