Matched spectral null encoder/decoder
US5801649A · kind A · utility
13Cited by
5References
10Claims
0Family size
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Key dates
| Filing date | Apr 21, 1997 |
| Grant date | Sep 1, 1998 |
| Priority date | — |
| Expiry date | Apr 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An encoder for matched spectral null binary codes is described, particularly for 12B/15B codes. The codeword trellis is partitioned into two or more subtrellises, and each subtrellis is encoded separately. The codeword is the concatenation of the codewords produced by the subtrellises. Some valid sequences have to be excluded, in order to ensure that all concatenations are valid, but the storage requirements, are greatly reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.