导　　师： 沈海斌

学科专业： H0902

授予学位： 硕士

作　　者： ;

机构地区： 浙江大学

摘　　要： 本论文主要包括以下几个方面进行论述：　　第一章绪论部分简要介绍了视频技术的发展及其基本概念。 第二章介绍了h.264/avc的编解码结构和主要技术：帧间、帧内预测编码，去快滤波，整数变换，量化，熵编码等。 第三章分析了h.264/avc视频数据位流的结构组成并确定其位流数据的具体句法和句法元素。 第四章主要叙述了熵编码原理，并针对熵编码的码表特性，采用适当缩小其码表搜索范围来进行算法优化，有效的提高了编码器在熵解码时的效率。 第五章结论展望了视频编解码的发展趋势。 Since the 1990's, with the rising up of the third science revolution wave, the technology of communication and computer network is developing with tremendous speed and the human race has rushed into digital information period. As a rapidly developing electrical information technology, the multimedia technology is one of the hottest focus points because it brings about directional revolutions in traditional computer system and audio-video devices. It ameliorates people's communication and gives a far-reaching impact on public communication. As one of the multimedia technology, the video technology is also promoted and a series of standards were mapped out, such as MPEG-1, MPEG-2, MPEG-4, H.261, H.263 and H.264.In the new century, with the increase of both the density and the speed of the VLSI, and the widely applied network technology, the video codec standard plays an important role on application of communication, computer and broadcast. It has brought about many changes in people's lives. As a new generation of video codec criterion, H.264//AVC is focused in the field of video because of its unique character.This paper includes five aspects as follows:The instruction briefly presents the development of video technology and the basic conception.Chapter Ⅱ introduces the structure of H.264//AVC and its main technology, such as inter and intra prediction, deblocking filter, transform, quantization and entropy coding.Chapter Ⅲ analyses the structure of data stream and extracts its syntax and semantics.In chapter Ⅳ, the entropy coding is described, and according to the characteristic of entropy coding tables, an optimization of dividing blocks to lessen the searching range has been brought forward, so that the decoding speed of processing the entropy coder is greatly increased.Finally, a summary of this paper is presented and the tide of video codec is discussed.

关 键 词： 视频编解码 编解码结构 帧内预测 位流数据

分 类 号： [TN919.81]

领　　域： [电子电信] [电子电信]