Profit-oriented bit rate distribution for video encoding

摘要

The multimedia system [100] allocates bits to portions of the frames [102] based on bit usages and quality metrics for different quantization parameters (QP) during encoding of the multimedia stream. The encoder [110] of the multimedia system encodes the frame from a first pass to a first QP and a second pass to a second QP. The comparator [420] of the multimedia system measures and compares quality metrics such as the mean square error for each portion of the frame encoded with the first QP and the second QP. The comparator compares the difference between the quality metrics for each part encoded with each QP with a threshold. If the difference in quality metrics for a portion exceeds the threshold, the comparator selects a portion to include in the subset of portions to be encoded with the second QP.