一种方向插值预测变长编码的帧存有损压缩算法  

A Lossy Frame Memory Compression Algorithm Using Directional Interpolation Prediction Variable Length Coding

作　　者：罗瑜[1] 张珍珍 LUO Yu;ZHANG Zhenzhen(Department of Basic Medicine,Shaanxi University of Chinese Medicine,Xi’an 712046,China;Institute.of Systems,National University of Singapore,119077,Singapore)

机构地区：[1]陕西中医药大学基础医学院,西安712046 [2]新加坡国立大学科学信息系统学院,新加坡119077

出　　处：《电子与信息学报》2019年第10期2495-2500,共6页Journal of Electronics & Information Technology

基　　金：国家高技术研究发展计划(863计划)(2015M16903)~~

摘　　要：为了提高帧存储的压缩性能,该文提出一种基于方向插值预测变长编码(DIPVLC)的帧存有损压缩算法。首先根据自适应纹理方向插值获取参考像素,从而得到预测残差,然后优化率失真模型对预测残差进行量化,最后通过游程哥伦布算法对量化残差进行变长编码。实验结果显示,与内容感知自适应量化(CAAQ)的帧存压缩算法相比,该文算法不但PSNR下降更少,而且压缩率提高了10.05%,同时编码时间减少了10.62%。A lossy frame memory compression algorithm using Direction Interpolation Prediction Variable Length Coding(DIPVLC)is proposed to improve frame memory compression performance.Firstly,the prediction residual is obtained by adaptive texture directional interpolation.Then,a new rate-distortion is optimized to quantize prediction residual.Finally,the run length Golomb method is used to entropy coding for quantized residual.Simulation results show that compared with parallel Content Aware Adaptive Quantization(CAAQ)oriented lossy frame memory recompression for HEVC,the proposed algorithm improves the compression rate by 10.05%and reduces the encoding time by 10.62%with less PSNR reduction.

关 键 词：有损压缩 压缩率 帧存储 编码时间 

分 类 号：TN919.81[电子电信—通信与信息系统]