Delay-Power-Rate-Distortion Model for Wireless Video Communication Under Delay and Energy Constraints

作者：Li, Chenglin^*; Wu, Dapeng; Xiong, Hongkai

来源：IEEE Transactions on Circuits and Systems for Video Technology, 2014, 24(7): 1170-1183.

DOI：10.1109/TCSVT.2014.2302517

• Delay-power-rate-distortion (d-P-R-D) model
• H.264/AVC
• rate control (RC)
• video coding
• wireless video

Smart mobile phones are capable of performing video coding and streaming over wireless networks, but are often constrained by the end-to-end delay requirement and energy supply. To achieve optimal performance under the delay and energy constraints, in this paper we extend the traditional ratedistortion (R-D) model and the previously proposed delay R-D model to a novel delay-power-rate-distortion (d-P-R-D) model by including another two dimensions (the encoding time and encoder power consumption), which quantifies the relationship among source encoding delay, rate, distortion, and power consumption for IPPPP coding mode in H.264/AVC. We have verified the accuracy of our proposed d-P-R-D model through experiments. Based on the proposed d-P-R-D model, we develop a novel rate-control (RC) algorithm, which minimizes the encoding distortion under the constraints of rate, delay, and power. The experimental results demonstrate the superiority of the proposed RC algorithm over the existing scheme. Therefore, the d-P-R-D model and the model-based RC provide a theoretical basis and a practical guideline for the cross-layer system design and performance optimization in wireless video communication under delay and energy constraints.

• 出版日期2014-7
• 单位上海交通大学