关键词: 运动补偿时域滤波, 三维小波/子带视频编码, 码率控制, 码率分配, 质量可分级, 率失真优化

Abstract:

In Motion-Compensated Temporal Filtering (MCTF) based 3D wavelet/subband scalable video coding, quality scalability or rate scalability is implemented by extracting corresponding sub-streams from a full-resolution embedded code stream. This paper first expounds the theoretic fundamentals for the commonly used bitplan truncation algorithm and points out its sub-optimality. An optimal subband rate allocation algorithm in mean-squared error (MSE) minimization sense is proposed, achieving persistent optimal rate-distortion per-formance under any given rate constrains. Comparative experiment results also show that the choice of bit alloca-tion strategies has serious influence on the performance of the 3D subband video coding.

Key words: MCTF, 3D Subband/wavelet video coding, rate control, rate allocation, quality scalable, rate-distortion optimization