Freeze-picture transmission apparatus
US4467355A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 26, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Jan 26, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The public telephone line has a bandwidth insufficient for the rapid transmission of video signals. A long time period is required therefore. The present invention improves this long transmission time. The freeze-picture transmission apparatus according to the present invention receives a plurality of video signals in a predetermined order. The received one is compressed and stored in memory. The read-out from the memory is done at a speed corresponding to a bandwidth of the transmission line. The compressed video signal read-out from the memory is transmitted to the reception unit. In the reception unit, the compressed video signal transmitted is once stored in another memory. The read-out from another memory is done at a TV scanning speed. The compressed video signal read-out from another memory is displayed by TV.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.