Exploiting bit-depth scaling for quality-scalable energy efficient display processing

The energy efficiency of video display processing is critical for its integration into mobile SoC. This paper proposes a bit-depth scaling scheme to enable dynamic voltage and frequency scaling for external memory system and hence provides a quality-scalable energy efficient display processing solution. Experimental results have demonstrated that the proposed scheme is able to steadily reduce the energy consumption of overall external memory system by up to 23.8%, with graceful image quality degradation and very low cost overhead.