Digital coding process for recording sound channels with a television signal and apparatus realizing this process
US4314369A · kind A · utility
4Cited by
3References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1979 |
| Grant date | Feb 2, 1982 |
| Priority date | — |
| Expiry date | Oct 25, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/9203
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an audiovisual signals diffusion apparatus, a digital coding process for protecting coded digital sound signals alternately recorded with video signals against alterations or deteriorations encountered during the transcription process onto a recording carrier or support, comprising the steps of selectively protecting signals representing low analog levels against large erroneous variations, transmitting several times the thus protected signals and garbling the different bits of successively transmitted digital signals, said process being compatible with the multiplexed recording of several sound channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.