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Power consumption analysis for video coding algorithms in embedded multimedia systems

The power consumption for the battery-supplied DSP-embedded multimedia systems based on a test platform, i.e. TI C64x, is analyzed in this research. We focus on the behavior of some frequently used compress/decompress functional modules. In particular, a MPEG-4 simple-profile decoder consisting of these modules is evaluated at the highest compiler optimization level so as to understand power allocation in embedded multimedia systems. Two DCT schemes are examined to find out a better power behavior. The integer DCT can reach 47% power saving as compared with an implementation of the float DCT. Overall, our studies provide a better understanding of the system-level power modeling and consumption estimation for embedded multimedia applications, and suggest some optimization methods.