Inter-frame wavelet transform coder for color video compression
US5495292A · kind A · utility
120Cited by
7References
1Claims
0Family size
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Key dates
| Filing date | Sep 3, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Sep 3, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/15
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video coding scheme based on wavelet representation performs motion compensation in the wavelet domain rather than spatial domain. This inter-frame wavelet transform coding scheme preferably uses a variable-size multi-resolution motion compensation (MRMC) prediction scheme. The MRMC scheme produces displaced residual wavelets (DRWs). An optimal bit allocation algorithm produces a bit map for each DRW, and each DRW is then adaptively quantized with its respective bit map. Each quantized DRW is then coded into a bit stream.
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