Compression based reduced memory video decoder
US6222886A · kind A · utility
129Cited by
13References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1996 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Jun 24, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A compressed video decoder receives a stream of compressed video data in a channel buffer, and decompresses it. A portion of the decompressed video data is recompressed as intraframe data to serve as an anchor frame. The intraframe data is motion compensated, and then a reference picture is selected. The reference frame data is decompressed. Next, a region of interest is selected and stored in display memory for the decompressed form. The recompression of data to be used as an anchor frame can be done in a substantially lossless manner by using DCT with the same quantization matrix, quantizer scale, and field/frame coding type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.