计算机工程与应用Issue(17)：155-159,177,6.DOI:10.3778/j.issn.1002-8331.1303-0425
基于HEVC屏幕图像编码的哈希表的优化算法
Optimization algorithm on hash table based on HEVC screen content cod-ing
摘要
Abstract
The preudo 2-D matching algorithm has good compression performance for the discontinuous-tone content of screen content. However, the large space overhead of the hash table is not conductive to realize the hardware in this algo-rithm. This paper proposes a 3-byte hash value method to reduce the space of the hash table for optimizing the original method. The source data is treated as the data set composed of elements for YUV triples. Then the hash value of YUV triple is calculated as a unit. It not only can reduce the amount of computation of the hash values, but also can minimize the space overhead of the hash table. The experimental results show that the 3-byte hash value method makes the storage space of the hash table reduce to one-third of the original. And the BD-rate performance of some test screen images is also improved.关键词
高效率视频编码(HEVC)/仿2维匹配算法/屏幕图像/哈希表Key words
High Efficiency Video Coding(HEVC)/preudo 2-dimension matching algorithm/screen content/hash table分类
信息技术与安全科学引用本文复制引用
金小娟,张培君,林涛..基于HEVC屏幕图像编码的哈希表的优化算法[J].计算机工程与应用,2014,(17):155-159,177,6.基金项目
国家自然科学基金（No.61201226，No.61271096）；上海市自然科学基金（No.12ZR1433800）；中央高校基本科研业务费专项资金（No.2810219002，No.2810219003）。 （）
