Video codec, for a videophone terminal of an integrated services digital network
US5367331A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Feb 23, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video codec for a videophone terminal of an integrated services digital network. The codec is organized to receive firstly image signals from a television camera so as to transmit them, after compressing and encoding them, to a remote video decoding unit, via a digital transmission line, and secondly similarly-processed image signals via the digital transmission line, so as to decompress and decode them for a television screen receiver locally connected to the video codec. The video codec includes a processing unit, of the integrated circuit type, co-operating with a single external memory plane both to compress and encode data to be transmitted, and also to decompress and decode received data, with the assistance of internal operational components time shared so as to apply known methods to transmission and to reception.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.