Method and system for optimized video coding

Details Method and system for optimized video coding Method and system for optimized video coding

H - Electricity

04

N

H04N 7/24 (2011.01) H04N 7/50 (2006.01)

Patent

CA 2696459

A method and encoder for full rate-distortion optimization of video coding over four free parameters; namely, coding mode, motion vector, quantizer scaling factor, and transform domain coefficients. In all cases, the rate-distortion cost for each combination of the parameters is determined based on soft decision quantization; specifically, a graph-based searching algorithm that reveals the optimal quantized transform domain coefficients for encoding a macroblock or sub-block of a macroblock. The full joint optimization includes a full search of the product space defined by the possible combinations of the free parameters without approximations. Approximations and simplifications to reduce complexity are also disclosed.

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