Quantization circuitry as for video signal compression systems
US5731837A · kind A · utility
66Cited by
11References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 25, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Jan 25, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a compression system including a quantizer for quantifying a matrix of coefficients according to a matrix of quantizing values, and which is responsive to rate buffer occupancy for providing quantizing scale factors to modify the quantizing matrix, significant channel capacity may be salvaged without significant loss of image quality by incorporating apparatus to limit the minimum values of quantizing scale factors that are applied to the quantizing matrix.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.