a frame memory lossless compression using grain-directional adaptive prediction and Golomb run-length entropy coding is proposed. First
the optimal reference pixels were obtained through double-scan and multi-directional prediction;then
the pixel differences were calculated and entropy-coded through Golomb and run-length. In this way
the compression performance is improved. Simulation results show that compared with those of reference frame lossless compression based on intra prediction and Golomb entropy coding
the average compression ratio is increased by 16% while the average coding time is reduced when using the proposed algorithm.