A power reduction technique based on the microscopic dynamic voltage scaling (DVS) of multimedia processors in wireless communication terminal

The paper proposes a DVS method, which effectively reduces the power consumption of multimedia signal processor. Analytical expressions for effective range of power saving efficiency obtained with the assumption of a Gaussian distribution for the frame-based computational burden of the multimedia processor are derived. A closed form solution for the power saving factor is obtained in terms of the mean and standard deviation of the distribution. An MPEG-2 audio/video decoder algorithm is tested on Xscale processor for experimental verification of the power saving due to the proposed DVS approach. The experimental results with diverse MPEG-2 audio/video files show about 35% power saving efficiency.