Video signal encoding method with a substantially constant amount of transform data per transmission unit block
US5126842A · kind A · utility
70Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Dec 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of encoding a video signal into highly efficiently encoded data comprises the steps of: digitizing and blocking the video signal; performing a discrete cosine or Fourier transform on the blocked data; controlling the amount of data in each block to be substantially constant according to an amount of encoded data awaiting transmission; calculating a threshold amplitude; and selecting data larger in amplitude than the threshold amplitude as encoded data for transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.