欢迎来到天天文库
浏览记录
ID:871719
大小:3.03 MB
页数:42页
时间:2017-09-22
《基于h.264的iptv视频流抗误码技术的研究毕业论文》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、毕业设计(论文)课题名称:基于H.264的IPTV视频流抗误码技术的研究摘要随着计算机技术和互联网以及视频压缩技术日渐趋于成熟,IPTV在高速互联网上的应用成为现实,发展前景非常广阔。对于IPTV业务,网络传输既有语音,又有视频数据,实时性很强。用户需要的是高质量、流畅的画面,任何超过人们可接受程度的信号中断、马赛克等都影响视频质量,从而降低人们的视觉感受,因此,如何改善IPTV视频质量是非常必要的,而其核心技术就是发生丢失的信号进行恢复或补偿。本文针对IPTV视频流在传输或接收的过程出现丢包、误码情况,提出基于权重马尔可夫随机场WMRF内插误码掩盖算法,以提高IPTV视频质量,对H.2
2、64视频流采用本文提出的误码掩盖技术恢复受损的数据,以提高人们的视觉感受。通过实验证明,本文误码掩盖算法在客观质量和主管质量上都有一定的提高。关键字:IPTVH.264误码掩盖技术WMRFABSTRACTWiththedevelopmentofcomputertechnology,Internetandvideocompressiontechnology,thesemakeitbecomearealitythatIPTVapplicationinhigh-speedInternet,developmentprospectsareverywide.ForIPTVbusinessspeaki
3、ng,networktransmissionhasbothvoiceandvediodata,real-timeisverystrong.Whattheuserneedsisthepicturewithhighqualityandsmoothframe,anymorethanpeoplecanacceptdegreeofsignalinterruption,suchasvideoqualityimpactMosaic,thusdecreasingthevisionofpeoplefeeling,therefore,howtoimprovetheIPTVvideoqualityisvery
4、necessary,anditscoretechnologyislostsignalrecoveryorcompensation.VideoforIPTVtransmittedorreceivedintheprocessappearedlostpackage,errorcondition,basedontheWMRFisproposedtoimprovethevideoquality,usingtheerrorcodeconcealtechnologywhichispresentedinthispapertorecoverdamagedH.264video,inordertoimprov
5、epeople'svisualexperience.Theexperimentshaveprovedthattheerrorcodeconcealtechnologywhichthispaperpresentsmakeaprovementinbothobjectivequalityandsubjectivequality.KeyWord:IPTVH.264ErrorcodeConcealTechnologyWMRF目录第一章绪论.................................................................................
6、.................................11.1选题的研究背景与意义..................................................................................11.2设计相关知识..................................................................................................11.2.1IPTV..................................................
7、......................................................11.2.2H.264.......................................................................................................21.3课题研究的主要目标和任务..................................
此文档下载收益归作者所有