{"title":"An efficient Multi-Directional Lossless Recompression for video coding systems","authors":"Yi-Guo Chen, Yu-Hsuan Lee, Chao-Chyun Chen","doi":"10.1109/ISBB.2014.6820916","DOIUrl":null,"url":null,"abstract":"Video coding systems suffer from tremendous memory bandwidth requirement on external memory. This bandwidth is directly proportional to display resolution and frame rate. The aspiration of high-end visual quality drives display resolution and frame rate upgraded to a certain level. That also causes a design bottleneck on the memory bandwidth of external memory in video coding systems. In this paper, the Multi-Direction Lossless Recompression (MDLR) is proposed to alleviate above issue. It includes two core techniques: (1) Multi-Directional Prediction and (2) Direction-Adaptive Golomb-Rice code. The Multi-Directional Prediction can obtain an efficient residual. Then, Direction-Adaptive Golomb-Rice code converts it into an efficient codeword. The experiment result shows that the proposed MDLR can save the memory bandwidth of the video coding system as high as 42% on average.","PeriodicalId":265886,"journal":{"name":"2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2014-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 IEEE International Symposium on Bioelectronics and Bioinformatics (IEEE ISBB 2014)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISBB.2014.6820916","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Video coding systems suffer from tremendous memory bandwidth requirement on external memory. This bandwidth is directly proportional to display resolution and frame rate. The aspiration of high-end visual quality drives display resolution and frame rate upgraded to a certain level. That also causes a design bottleneck on the memory bandwidth of external memory in video coding systems. In this paper, the Multi-Direction Lossless Recompression (MDLR) is proposed to alleviate above issue. It includes two core techniques: (1) Multi-Directional Prediction and (2) Direction-Adaptive Golomb-Rice code. The Multi-Directional Prediction can obtain an efficient residual. Then, Direction-Adaptive Golomb-Rice code converts it into an efficient codeword. The experiment result shows that the proposed MDLR can save the memory bandwidth of the video coding system as high as 42% on average.
视频编码系统对外部存储器的带宽要求非常高。该带宽与显示分辨率和帧速率成正比。对高端视觉质量的追求带动了显示分辨率和帧率的提升。这也导致了视频编码系统外部存储器带宽的设计瓶颈。本文提出了多方向无损再压缩(Multi-Direction loss - less Recompression, MDLR)技术来解决上述问题。它包括两个核心技术:(1)多向预测和(2)方向自适应Golomb-Rice码。多方向预测可以获得有效的残差。然后，方向自适应Golomb-Rice码将其转换为有效码字。实验结果表明，该算法可为视频编码系统平均节省高达42%的存储带宽。
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