Rate control scheme for base layer in scalable video coding 基于可分级编码基本层的码率控制方法
So scalable video coding ( svc ) is presented . recently, it has been researched intensively and has got noteworthy achievement 于是可伸缩性视频编码(svc)便应运而生,并且成为近几年视频编码领域的研究热点,取得了显著的研究成果。
This thesis has focused on the key technologies of video transmission system, including fine granular scalable video coding, congestion control and error control technology 然而,由于视频的信息量大,且internet又是尽力型网络,因此internet上的视频通信也是一个研究难点。
Due to its multiresolution, time / frequency localization and lower time complexity, wavelet is suitable for scalable video coding, which has been applied to coding algorithms such as ezw, spiht and ebcot 随着用于图像压缩的ezw、spiht和ebcot模型及用于视频压缩的3d-ezw、3d-spiht和3d-escot模型的出现,基于小波变换的嵌入编码已成为图像视频压缩研究的主流。
Second, an adaptive rate-distortion model is proposed by extending directed acyclic graph model for fine granular scalable video coding . we add rate, original distortion and adaptive scale to the directed acyclic graph model 其次,针对精细粒度可扩展视频编码技术,本文扩展有向无环图模型,在该模型中加入码率,原始失真和自适应因子等属性,建立了自适应率失真模型。
The detailed fine granular scalable video coding technology and several improvements are presented . in the third part, a communication framework for fine granular scalable video stream is proposed . this framework has integrated video coding, decoding, congestion control and error control mechanism for video transmission 本文提出了internet中精细分层编码的视频通信系统框架,该框架有机地集成了精细分层的视频编解码、视频传输中的拥塞控制和差错控制等技术。
This thesis introduces a motion compensated 3d wavelet scalable video coding system . and three key techniques of the coding system have been thoroughly researched, namely mc temporal filtering, 3d wavelet transform structure and 3d wavelet subband coding . firstly, traditional wavelet transform theory and wavelet lifting scheme are illustrated 本文在对运动补偿三维小波可扩展视频编码框架进行分析的基础上,对该框架涉及的三个关键技术,即运动补偿时域滤波、三维小波变换结构以及三维小波子带编码进行了深入研究。
scalable video coding ( such as mpeg-4 fgs and jvt svc ) and streaming is one of the most promising technologies . in this thesis, we investigate the key problem of scalable video coding and streaming : rate-distortion analysis and approximation, with which we also design some simple and effective smooth quality reconstruction algorithms of video streaming 本文主要的内容和创新点包括:由于广义高斯分布ggd(generalizedgaussiandistribution)的高度灵活性,理论上和实际中它都可以非常好地描述离散余弦变换(dct)和小波变换(wavelettransform)的编码系数(transformcoefficients)。
Scalable video coding ( such as mpeg-4 fgs and jvt svc ) and streaming is one of the most promising technologies . in this thesis, we investigate the key problem of scalable video coding and streaming : rate-distortion analysis and approximation, with which we also design some simple and effective smooth quality reconstruction algorithms of video streaming 本文主要的内容和创新点包括:由于广义高斯分布ggd(generalizedgaussiandistribution)的高度灵活性,理论上和实际中它都可以非常好地描述离散余弦变换(dct)和小波变换(wavelettransform)的编码系数(transformcoefficients)。
In the fourth part, some key technologies about fine granular scalable video coding, decoding and rate shaping are surveyed, including how to shape the stream to get a better psnr, and how to allocate the rate of base and enhancement layer . a comparison study on the rate shaping analytic model of normal layered coding and fgs coding is presented 另外,本文在对现有的fgs编解码技术深入研究的基础上,改进了精细分层编码中的截取算法,并讨论了码率分配算法,通过实验得到了码率分配的重要结论,且提出和对比了一般分层编码和精细分层编码的码流截取算法解析模型。