Methods and apparatus for reducing the bandwidth of a video signal
US3982063A · kind A · utility
22Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1975 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Feb 3, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Alternate lines of a 526 line video signal are time-stretched and transmitted over a transmission channel of limited bandwidth. At the receiver, the lines are compressed back to their original duration and displayed in an interlaced manner on a conventional receiver by blanking alternate lines in each field. In another embodiment of the invention, adjacent transmitted lines of the video signal are averaged at the receiver and the resultant signals are substituted for the non-transmitted lines of the video signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.