Method and apparatus for generating error correction codes for digitized picture signal recording/reproducing
US4698811A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 19, 1985 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Jul 19, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/945
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for recording or reproducing codes resulting from digitalizing a picture signal on or from a video tape recorder includes a device for correcting code error produced due to interference in the course of recording or reproducing process. The pixel codes succeeding to one another in time are divided to high-order and low-order bit-blocks, respectively, wherein the high-order bits are used to constitute a pseudo pixel code which is then added with a pixel error correcting code. The pixel code consisting of the high-order bits is added with a bit error correcting code before being recorded. In reproduction, error correction can be realized at higher rate with the aid of the correction codes to improve the quality of reproduced picture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.