简介:ThispaperintroducestwostepstodesignaquantizerofH.261CODEC:thefirststepistoimplementthecoarsequantizingthroughcontrolalgorithmforthebuffer'soccupationratio;thesecondstepistofinishtheaccuratequantizingthroughthecontrolalgorithmofvisualcharacteristics.Moreover,satisfactoryeffectsaregotusingthesealgorithmsthroughexperiment.
简介:积累的低密度同等值检查(LDPCA)codec被建议为在编码的分布式的录像(DVC)发现工程,它提供灵活编码率。尽管使率适应录像的关联能使用反馈隧道,但是在真实应用程序,用反馈,隧道不能总是是可能的。解决这个问题,一些研究人员求婚了在编码器估计代码率,但是性能不很好。基于他们的研究,这篇论文在率估计上为重复考虑集中率的影响,它能用它的检查矩阵是计算的。作为一个预研项目,这篇论文注意常规LDPCAcodec。同时,它在估计的转线路概率考虑偏差的影响,它给一些限制评估估计。在实验,建议算法能由多达1dB1.2dB改进率失真表演。
简介:我忽然产生了一种想要了解自己外在形象的冲动。在公元2200年,这个想法简直有点不切实际——存活了千年的镜子已经被淘汰了——谁还愿意把自己抽离虚拟世界来照一下镜子呢?
简介:Face-to-faceVideoconferencingisapopularoptionformanylargeorganizationsbecauseitminimizestheneedfortravel.Insteadofcontinuallypayingfortravelingexpenses,acompanycaneitherpaytosetupahighspeednetworkwhichhasmanyusages(includingvideoconferencing)ortheycanrenttimeonanexistingnetwork.Employeeswillalsonolongerbeburdenedwiththeneedtotravel.Whileface-to-facevideoconferencingperformanceisheavilyinfluencedbytheunderlyinghardwareandsoftware,agoodvideocompressionschemecanhelpmakethebestuseofvideoconferencingandprovideahighqualitypicture.H.263standardisnowwidelyusedforreal-timevideocommunicationsoverarangeofnetworksincludingtheInternet.AframeworkforbetterunderstandingtheH.263includingtheimplementationofencoderanddecoderforface-to-facevideoconferencingispresented.ThissoftwarewaswritteninC++language,runningundertheMicrosoftWindowsoperatingsystem.