Format detection
US7644346B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Nov 7, 2003 |
| Grant date | Jan 5, 2010 |
| Priority date | — |
| Expiry date | May 23, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of assessing an encoded signal to determine whether a candidate format was used to arrange the signal into blocks before the encoding was done, the method comprising: using the Viterbi algorithm to determine trellis metrics for a point in said signal that would be an end point of a candidate block according to the candidate format; determining from said metrics the likelihood of occupation at said point of an end state of an encoding scheme used to create the encoded signal; decoding a part of said signal ending at said point; and performing a check using said decoded part to determine whether the candidate block satisfies an error protection scheme of the candidate format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.