Sound and image transmission system
US4887158A · kind A · utility
20Cited by
3References
6Claims
0Family size
Inventors
Key dates
| Filing date | Oct 12, 1988 |
| Grant date | Dec 12, 1989 |
| Priority date | — |
| Expiry date | Oct 12, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6137
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound and image transmission system which is applicable to television-telephony, uses a single transmission line and multiplexes the image signal and the sound signal with an output which is essentially identical to the rhythm of an encoded image and the sound of the latter image. The encoder and decoder for the image processing lines function for only part of the time, but faster than if they functioned continuously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.