A rate-distortion analysis on motion prediction efficiency and mode decision for scalable wavelet video coding

作者：Tsai Chia Yang; Hang Hsueh Ming^*

来源：Journal of Visual Communication and Image Representation, 2010, 21(8): 917-929.

DOI：10.1016/j.jvcir.2010.09.001

• Interframe wavelet coding
• Scalable wavelet video
• Motion prediction efficiency
• Motion information gain
• Rate-distortion optimization
• Prediction mode decision
• Video coding bit allocation
• Video coding rate control

A rate-distortion model for describing the motion prediction efficiency in interframe wavelet video coding is proposed in this paper. Different from the non-scalable video coding, the scalable wavelet video coding needs to operate under multiple bitrate conditions and it has an open-loop structure. The conventional Lagrangian multiplier, which is widely used to solve the rate-distortion optimization problems in video coding, does not fit well into the scalable wavelet structure. In order to find the rate-distortion trade-off due to different bits allocated to motion and textual information, we suggest a motion information gain (MIG) metric to measure the motion prediction efficiency. Based on this metric, a new cost function for mode decision is proposed. Compared with the conventional Lagrangian method, our experiments show that the proposed method is less extraction-bitrate dependent and generally improves both the PSNR performance and the visual quality for the scalability cases.

• 出版日期2010-11