Motion video coding with adaptive precision for DC component coefficient quantization and variable length coding
US5559557A · kind A · utility
185Cited by
14References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1993 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Sep 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Direct current component coefficients resulting from an orthogonal transformation of a video signal are encoded with a precision, expressed in terms of quantization bits, which may be varied at each video sequence, group of pictures, picture, slice, macroblock or block portion of the video signal in accordance with a required picture quality. The encoded coefficients may be decoded in accordance with the precision used during encoding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.