Video processing of a quantized base layer and one or more enhancement layers
US6931060B1 · kind B1 · utility
12Cited by
2References
23Claims
0Family size
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Key dates
| Filing date | Mar 30, 2000 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an encoding process, video data are represented as a bitstream of a quantized base layer and one or more enhancement layers, which capture the difference between a quantized base video picture and an original unquantized input video picture. Due to bandwidth constraints on a communication channel, it may be unfeasible to transmit all enhancement layers. During the encoding process, the enhancement layer data may be adjusted to give transmission priority to information in the enhancement layers that is visually important. Following transmission, the adjustment may be undone during the decoding process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.