摘要
Abstract
In order to improve the efficiency of lossless compression,this paper proposes a lossless compression algorithm based on high efficiency video coding.In this algorithm,pixels in macro block are divided into different part to predict,instead of using a block-based prediction as a whole.More specifically,pixels are divided into three parts:pixels of first part are predicted by referring the neighbor macro block pixels; then pixels in other parts are predicted using the pixels,which has been predicted,as reference,which can eliminate effectively spatial redundancy.Moreover,since the transform and quantization modules are removed from the framework of HEVC,the residuals need to be adjusted to the distribution characteristics in a reasonable order for the entropy coding,thus the purpose of further improving compression efficiency is achieved.关键词
数字图像/高效率视频编码/无损压缩编码/分级预测/自适应扫描Key words
digital image/ HEVC/ lossless compression coding/ hierarchical prediction/ adaptive scanning分类
信息技术与安全科学
