An effective dictionary-based display frame compressor

For all video applications, large amounts of data are processed within a bounded time. These data are usually stored in a low-cost slow external DRAM which results in high memory bandwidth requirement. The memory bandwidth will dominate the system performance, especially for applications running on embedded systems. In this paper, we propose an effective dictionary-based compression and de-compression algorithm for display frames in a video decoding system and present its hardware implementation. We have integrated the proposed design into an H.264/AVC video decoder. Simulation result shows that the proposed algorithm achieves 54% of compression ratio and 34% of memory traffic reduction when decoding 1080 HD video. It is much more effective than all previous works.