Motion-based adaptive quantization
US9621900B1 · kind B1 · utility
2Cited by
9References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 7, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Dec 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is described herein motion-based adaptive quantization for compressing video streams. Motionless portions of pictures are detected and the compression quality of these portions is increased while the compression quality of non-motionless portions is decreased. The QP of a portion of image data, such as a macroblock, is modified for successive motionless portions from a start QP to a target QP in accordance with a multi-step change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.