Method and apparatus for identifying errors in a detected sequence of values
US6470474B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1999 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Sep 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/1803
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are provided for identifying errors in a detected sequence of values generates the detected sequence of values from channel samples using a detector designed for a channel with a first channel response characteristic. The detected sequence of values is filtered using a filter that emulates a second channel response characteristic to produce a sequence of simulated second channel samples. The channel samples provided to the detector are also provided to a second filter which emulates a response characteristic equal to the second channel response characteristic divided by the first channel response characteristic. This produces a sequence of actual second channel samples. A sequence of difference values is then generated by subtracting each of the simulated second channel samples from a corresponding actual second channel sample. Using the sequence of difference values, at least one error is identified in the detected sequence of values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.