Bit allocation in a coded video sequence
US5835149A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method and apparatus for encoding video pictures of a sequence of video pictures, wherein each picture is defined by one picture type of a plurality of picture types and each picture has a complexity. According to a preferred embodiment, the complexity of each picture type is estimated to provide a complexity estimate for each picture type. Encoding a picture at an average quantization level produces an encoded bit stream having a codesize related to the complexity of the picture, and each picture type is associated with a target codesize. An average quantization level is determined for the first picture of each picture type in accordance with the target codesize and complexity estimate of each of the first pictures, respectively. The first picture of each picture type is then encoded at its respective average quantization level. An actual average quantization level at which each first picture was actually encoded is determined, and the complexity estimate for each picture type is updated in accordance with the actual average quantization level and codesize of the first picture of the picture type encoded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.