摘要近几年来，随着计算机网络技术以及视频传输技术的迅速发展，数字视频技术在通信和广播领域获得了广泛的应用。由于如今传输信号所使用的物理信道并不是无差错的，对于大多数的视频应用来说，在不可靠的通信信道中传输比特流产生的误码和丢包是不可避免的。而视频信息的误码会产生视频失真，严重影响视频的输出质量。因此，如何有效地隐藏传输过程中产生的误码、减少比特流差错对视频质量的影响对于数字视频技术的发展是非常重要的。26995
本文主要对H.264的错误隐藏技术进行研究，首先概括了H.264视频编码标准，然后简述了H.264的抗误码技术，并详细介绍了H.264所使用的错误隐藏技术。
之后针对现有错误隐藏技术的缺点，本文提出了一种新的的帧间错误隐藏算法。一方面，使用交错扫描的二次隐藏方法。使得块匹配更加精确。另一方面，在运动估计的步骤中使用简单的双向预测，有效地降低估计误差。
最后使用JM平台进行对比实验，在主客观质量两方面与H.264算法进行对比实验。
关键词  H.264  视频编码  错误隐藏  帧间
毕业论文设计说明书外文摘要
Title   Research on error concealment techniques       of video coding                              
Abstract
In recent years, with the rapid development of computer network technology and video transmission technology, digital video technology in the field of communications and broadcasting won the widespread application, for most of the video applications, in the transmission process of error is inevitable. The error of video information can seriously affect the output quality of video. Therefore, the error generated during the transmission is very important for the development of digital video technology.
This paper mainly studies the error concealment algorithm of the decoder. Firstly, the standard of H.264 video compression is introduced, then the error resilience technology of H.264 is introduced, and the error concealment algorithm of H.264 is introduced in detail.
For the shortcomings of the existing error concealment technology, an improved inter frame error concealment algorithm is proposed. On the one hand, in order to improve the condition of the adjacent macro blocks in the damaged macro block, a staggered two time hiding method is proposed. Makes block matching more precise. On the other hand, the estimation error can be effectively reduced by using simple bidirectional forecast in the motion estimation step.
Finally, the simulation experiment of the improved algorithm is carried out with the JM platform, and the experiment results are compared with the H.264 algorithm in the subjective and objective quality of the two aspects.
Keywords  H.264  Video coding  Error concealment  Inter frame
 目   次
1  绪论    1
1.1  选题背景及研究意义    1
1.2  国内外研究现状    1
1.3  论文研究内容与安排    2
2  H.264视频编码标准概述    4
2.1  H.264标准综述    4
2.2  H.264关键技术    4
2.3  本章小结    7
3  H.264错误隐藏技术研究    8
3.1  H.264的抗误码技术    8
3.2  H.264错误隐藏技术详述    11
3.3  本章小结    14
4  H.264帧间错误隐藏算法改进    15
4.1  改进算法思路    15 视频编码中错误隐藏技术研究:http://www.youerw.com/jisuanji/lunwen_21330.html