大众科技
大衆科技
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DAZHONG KEJI
2014年
11期
11-13
,共3页
蔡玉叶%赵利平%陈先义%林涛
蔡玉葉%趙利平%陳先義%林濤
채옥협%조리평%진선의%림도
HEVC%颜色量化%八叉树%一维串匹配编码
HEVC%顏色量化%八扠樹%一維串匹配編碼
HEVC%안색양화%팔차수%일유천필배편마
HEVC%color quantization%octree%intra string copy
文章在基于HEVC框架下提出了增加颜色量化预处理的无损一维串匹配方法(Intra String Copy)。在没有颜色量化预处理环节的无损一维匹配算法可能会由于存在视频采集误差或是上下文造成的细微误差而导致匹配失败,这对以无损匹配为核心的ISC造成了很大的影响。文章借鉴了图像处理中八叉树的颜色量化方法,对视频图像信息进行颜色量化预处理后再进行一维串匹配编码,对屏幕图像视频的编码适应性有了很大的提升。
文章在基于HEVC框架下提齣瞭增加顏色量化預處理的無損一維串匹配方法(Intra String Copy)。在沒有顏色量化預處理環節的無損一維匹配算法可能會由于存在視頻採集誤差或是上下文造成的細微誤差而導緻匹配失敗,這對以無損匹配為覈心的ISC造成瞭很大的影響。文章藉鑒瞭圖像處理中八扠樹的顏色量化方法,對視頻圖像信息進行顏色量化預處理後再進行一維串匹配編碼,對屏幕圖像視頻的編碼適應性有瞭很大的提升。
문장재기우HEVC광가하제출료증가안색양화예처리적무손일유천필배방법(Intra String Copy)。재몰유안색양화예처리배절적무손일유필배산법가능회유우존재시빈채집오차혹시상하문조성적세미오차이도치필배실패,저대이무손필배위핵심적ISC조성료흔대적영향。문장차감료도상처리중팔차수적안색양화방법,대시빈도상신식진행안색양화예처리후재진행일유천필배편마,대병막도상시빈적편마괄응성유료흔대적제승。
This paper proposed an intra string copy method with octree color quantization based on the frame of HEVC. In theory, if the contents in two different position of a picture are the same, the corresponding string should match to each other exactly. But the fact is that they may don’t match to each other due to some tiny video collection errors or some small errors brought on the context of the screen, which hurts the performance of the intra string copy which focused on lossless string matching badly. To reduce the hurts, the proposed method use the typical octree quantization as a pre-processing step to make sure the high performance of intra string copy.