Patent ID: 7274739
Filing Date: 2007-09-25
Classification: H04N

Abstract:
1. A method for improving video quality in statistical multiplexing, comprising: for each encoding channel in a statistical multiplexer, calculating a respective bit rate need parameter for encoding of a current frame in that encoding channel, wherein each need parameter is generated using look-ahead complexity from first pass encoding of a plurality of frames in a look-ahead pipeline for that encoding channel, said plurality of frames including said current frame; for each encoding channel in a statistical multiplexer, calculating a video buffering verifier level (VBV_Fullness) available to each encoding channel; determining whether the VBV_Fullness available to each encoding channel is sufficient for encoding said current frame of that encoding channel based on an initial complexity estimate for that current frame; in the event that the VBV_Fullness is determined to be sufficient, encoding said current frame using said need parameter; in the event that the VBV_Fullness is determined to be insufficient, scaling said need parameter by an adaptive panic multiplier and encoding said current frame using said scaled need parameter; and wherein if the VBV_Fullness is determined to be insufficient, further comprising: