Encoding/decoding video signals using quantization tables based on explicitly encoded base and scale matrices
US5812788A · kind A · utility
69Cited by
2References
42Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Video signals are encoded and decoded using a set of quantization tables that is generated from a base matrix and a scale matrix, which are both explicitly encoded into the encoded video bitstream. The sets of quantization tables may be changed as often as needed as long as the new base and scale matrices are explicitly encoding into the bitstream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.