Hybrid Pixel Encoding: An Effective Display Frame Compression Algorithm for HD Video Decoder

High definition (HD) video decoder processes a great amount of data within a bounded time and thus requires high memory bandwidth. The memory bandwidth will dominate system performance, especially in embedded systems. In this paper, we propose a loss less hybrid display frame compression algorithm called HPE (Hybrid Pixel Encoding) for HD video decoder considering high compression performance and real time operation. The algorithm combines dictionary coding and run length coding to achieve a low compression ratio. We integrate the proposed design into an H.264 decoder. Experimental results show that the proposed algorithm gains 67.7% of data reduction ratio on average when decoding 1080-HD video. It is much more effective than all previous works.