Modelling Energy Consumption of an ASIC MPEG-4 Simple Profile Encoder

In wireless video streaming, it is desirable to minimize the energy consumption of mobile devices while achieving target video quality. For this purpose, it is essential to model (i.e., estimate) the energy cost of the streaming system, including both video encoder and wireless transmission energy, under different system settings. In this paper, an energy consumption model is proposed for a MPEG-4 simple profile encoder implemented in ASIC. Our proposed model consists of three major steps: 1) compute the encoder energy consumption through power simulations; 2) empirically model the impact of configuration parameters through curve fitting; and 3) online updating of model coefficients. Experimental results show that our proposed model works well for different types of video, and the average estimation error is below 6%.