Apparatus for controlling quantizing in a video signal compressor
US5426463A · kind A · utility
150Cited by
18References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1993 |
| Grant date | Jun 20, 1995 |
| Priority date | — |
| Expiry date | Feb 22, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rate controlled VBR quantizing system includes a quantizer for quantizing partially compressed video data and further apparatus for monitoring the amount of compressed output data. Dependent upon the amount of compressed output data being lesser or greater than a predetermined value, the quantizer is conditioned to operate in a fixed quantization mode, or a mode wherein only selected blocks of data in respective frames are adaptively quantized, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.