A Sub-mW MPEG-4 Motion Estimation Processor Core for Mobile Video Applications

摘要

This paper describes a sub-mW motion estimation processor core for MPEG-4 video encoding. It features a Gradient Descent Search algorithm whose consumption power is only 6.8% of the l:4-subsumpling search, producing higher picture quality. Another feature is an optimized SIMD datapath architecture to decrease a decrease a clock frequency and an operating voltage. It has been fabricated with CMOS 5-metal 0.18μm technology. The measured power consumption to process a QCIF 15 fps video is 0.4mW under 0.85MHz, 1.0V.