Method and apparatus of adaptive lambda estimation in Lagrangian rate-distortion optimization for video coding
US8094716B1 · kind B1 · utility
6Cited by
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20Claims
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Key dates
| Filing date | Nov 8, 2005 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jun 22, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for hybrid video coding is disclosed. The method generally includes the steps of (A) calculating a bit rate based on a percentage of quantized zero coefficients resulting from encoding a plurality of components of a video signal, (B) calculating a distortion based on the percentage of quantized zero coefficients, (C) calculating a plurality of variances of a plurality of prediction error pictures and (D) calculating an adaptive Lagrangian multiplier in a Lagrangian rate-distortion optimization as a function of the bit rate, the distortion and the variance to minimize a Lagrangian cost.
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