Delay-power-rate-distortion model for H.264 video coding
In a video encoding system, the encoding performance would be determined by not only the rate-distortion (R-D) behavior, but also the encoding time and power consumption. To analyze and control the R-D behavior of the video encoding system under the encoding delay and energy constraints, in this paper, we extend the traditional R-D model to a novel delay-power-rate-distortion (d-P-R-D) model by including another two dimensions (the encoding time and power consumption), which quantifies the relationship among source encoding delay, rate, distortion and power consumption for IPPPP coding mode in H.264/AVC. Here, I and P stand for intra-coding and predictive coding, respectively. The model accuracy has been verified through experiments and compensated by considering the statistics of both the current frame and the previous frame.