Method and apparatus for providing reduced memory low density parity check (LDPC) codes
US7234098B2 · kind B2 · utility
32Cited by
3References
13Claims
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Key dates
| Filing date | Oct 22, 2004 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Dec 6, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/2906
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An approach is provided for generating Low Density Parity Check (LDPC) codes. An LDPC encoder generates a LDPC code with an outer Bose Chaudhuri Hocquenghem (BCH) code. For a rate 3/5 code, the approach provides a degree profile that yields reduced memory requirements for storage of the edge values without significantly affecting the performance with respect to an “unmodified” rate 3/5 code. The relevant parameters for the reduced memory LDPC codes are as follows: q=72, nldpc=64800, kldpc=nBCH=38880, kBCH=38688. The above approach has particular application in digital video broadcast services over satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.