Apparatus for providing data dependent detection in a data read channel
US7173784B2 · kind B2 · utility
13Cited by
17References
42Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 10, 2003 |
| Grant date | Feb 6, 2007 |
| Priority date | — |
| Expiry date | Jan 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/24
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for providing data dependent detection in a data read channel is disclosed. Parameters in a read channel are dynamically adjusted according to data dependent noise. For example, a comparison in an add-compare-select (ACS) unit of a Viterbi decoder may be adjusted or offset terms in error event filters may be biased to choose a Viterbi sequence with more transitions or to compensate for polarity dependent noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.