Adaptive quantization controller
US5999218A · kind A · utility
14Cited by
8References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1997 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Aug 20, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adder 101 computes the difference between the activity (act) of an objective block and the average value (avg(act)) of activities all over the previous frame. A shifter 102 shifts the difference by a specified bits (n). Finally, an adder 103 adds output of the shifter 102 to a reference quantizing step (Qj) determined by a code quantity control and outputs the added result as a quantizing step Mquant of the objective block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.