一种内存读写数据压缩算法  

A data Compression algorithm for memory Reading and Writing

作　　者：陈秋华 CHEN Qiu-hua(Fuzhou Rockchip Electronics Co.,Ltd,FuZhou 350003,Chin)

机构地区：[1]福州瑞芯微电子股份有限公司,福建福州350003

出　　处：《中国集成电路》2018年第7期38-43,共6页China lntegrated Circuit

摘　　要：在编码标准H264/H265中,由于采用了各种新的先进的压缩策略,提升了编码器的压缩效率,但内存读取带宽的压力也大大提升。针对视频压缩解码系统中遇到的内存读写带宽的问题,本文对几种常见的无损压缩算法进行了分析和比较,提出了一种变长无损压缩算法。同时,本文还介绍了两种常见的图像数据存储方式:bl ock模式和光栅模式,并以光栅存储方式为例详细介绍了变长无损压缩算法的过程。实践结果证明,变长无损压缩算法相对简单,硬件资源消耗不大,压缩效果理想。In the encoding standard of H264 / H265, due encoder compression efficiency is continuously improved, to the use of a variety of advanced new compression strategy, but the pressure of memory read bandwidth is also greatly increased. Aiming at the problem of the increasing memory read and write bandwidth in video codec sy common lossless compression algorithms are analyzed and compared in this paper, and a variable length stem, several lossless com- pression algorithm is proposed. Two common image data storage modes： block mode and raster mode are introduced in this paper. The process of variable length lossless compression algorithm is introduced in detail by taking raster mode storage as an example. The practical results show that the variable length lossless compression algorithm is relatively simple, the hardware resource consumption is small, and the compression effect is ideal.

关 键 词：图像压缩 无损压缩 变长码压缩 

分 类 号：TN919.81[电子电信—通信与信息系统]