System and method for performing error correction on still frame audio tape format video signals
US4866719A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Mar 21, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/802
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for performing error correction on an SFAT format video signal which has been encoded using an error correction code ECC2, and generating a video signal reconstructed from the error-corrected input signal. The error code preferably is a cross interleave Reed-Solomon code. In a preferred embodiment, the system is capable of reconstructing the output video signal so that it has either SFA or SFAT format. Since an SFAT signal includes duobinary encoded data in its active video areas, and thus may be doubly error encoded using two error correction codes (ECC1 and ECC2), the invention is capable of generating from such a doubly encoded signal an ECC1 error-encoded video signal, in SFA (or SFAT) format, which has been error-corrected using error code ECC2. This capability is particularly advantageous where the invention is embodied in a video disk mastering system or method. In a preferred embodiment, the invention also determines the error rate of the input signal and generates a report signal indicative of the input signal's detected error rate. A preferred embodiment of the invention performs both error correction and error detection on-line, in real time, and auto…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.