One-pass adaptive bit rate control
US5489943A · kind A · utility
21Cited by
1References
33Claims
0Family size
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Key dates
| Filing date | Feb 14, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Feb 14, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/152
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A one pass adaptive bit rate control method. Data from a previous video field is used to calculate a quantizer scale factor for use in compressing a current video field. Large changes in compressed data size is used to detect scene changes. When a scene change is detected, a marker is inserted into the compressed data stream in place of the compressed field. An interpolated field is substituted during decompression for the scene change marker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.