视频

Firstly, we processed hierarchy structure partition to the video, and analyzed the necessity of events as the retrieval units from the point of rogatory granularity in video retrieval; Secondly, from the video editing, we proposed a new technique that extracted the events based on the representational shots in order to low the computational complexity and prepare for the last work.

首先对视频进行了层次化的结构划分，从视频检索的查询粒度角度分析了以事件作为检索单元的必要性；其次从视频编辑特点出发，利用了基于代表性镜头的镜头组聚类手段，通过对视频数据进行聚类提取事件进而为提交片段查询作好准备，此法节省了在事件提取过程中的计算量。

The original video is spitted into a series of frame groups,for each frame in the group,the points of contour shape are described by MPEG-7,and taking advantage of hash function to calculate the keys between those points in the 1D- DFT transform domain and the watermark signals.

在该算法中，原始视频数据被分割成等帧数的视频组，利用MPEG-7的轮廓编码计算每个视频帧的主要物体轮廓坐标点集合；接着通过傅立叶变换得到该帧轮廓点形状不变量，利用哈希的方法计算水印信号并将这些不变量的有效值作为密钥之一；再对整个视频组的轮廓点进行傅立叶变换，得到其时间轴上的有效不变域，将水印信号嵌入在这个不变域的中频部分以确保了水印的鲁棒性。

This algorithm established subsegment correspondences by minimizing global differences between them, introduced search bound to change the whole searching to local searching, keeped temporal order of subsegments and could successfully matching similar videos which had different time scale.

在子片段的基础上进行视频相似性匹配，通过极小化两段视频的整体距离建立视频之间的子片段对应关系，引入搜索门限值，将全局搜索转变为在门限区域内的局部搜索，保持视频内部各子片段之间的时序关系并能处理非线性偏移。

BACE algorithm has the desired property that does not reduce the encoding efficiency of the CABAC entropy encoder compared to the CIME algorithm for CAVLC entropy encoder. Both CIME and BACE algorithms can adapt to the content security level by choose the amount and different key parts of the video stream to be encrypted, the theoretical and experimental results show that both these algorithms can effectively encrypt the video content. Due to the ability of encrypting the video content without violating the syntax, the BIME and BACE algorithms can be employed used for many advanced H.264/AVC coding options without first decrypting the video stream, like Data Partition and UnEqualized Protection for the enhancement of transmission robustness, and the scalable coding in order to match the different channel capacity.

上述两种结合了H.264/AVC熵编码器特征的内容选择性加密算法，由于其加密后的视频码流的句法结构完全符合H.264/AVC视频编码标准，与传统的基于块数据的块加密算法相比较，本文提出的两种内容加密算法可以使得加密后码流在无需解密的情况下，实现H.264/AVC视频编码标准为移动视频应用而设计的诸多特性，如：增强传输鲁棒性的数据分割技术和非均衡保护技术，以及直接做匹配信道带宽的分级编码操作等，具有更高的灵活性和计算效率，从而可以灵活运用于各种应用场合。

Therefore, there is a possibility for improving the performance of non-real-time data traffic while still meeting the QoS of service requirement for real-time CBR traffic. The DOCSIS is established as the primary HFC network data communication standard. The intended service allows transparent bi-directional transfer of Internet Protocol traffic between the Cable Modem Termination System in cable system headend and Cable Modem in customer locations with significantly high data rate.

DOCSIS HFC网络的宽带性能使得传输高质量的实时音视频数据成为可能，实时可变比特率视频业务是宽带HFC网络的主要应用之一，实时VBR视频业务具有严格的延时和延时抖动要求，然而当前的DOCSIS HFC网络只能提供高速Internet接入，只支持有限的服务质量保证，现有的协议和方法不适合上行传输实时VBR视频业务。

A video clip of Zhang Bin's wife Hu Ziwei commandeering a microphone at a China Central Television presentation of its coverage plans was easily one of the most viewed items on Chinese video site tudou.com on Monday.

周一在中国视频网站土豆网上出现了在央视一个奥运报道启动仪式上央视主播张斌的妻子胡紫薇抢过了话筒的视频片段，这段视频迅速成为了土豆网点击率最高的视频。

For the first things, we promise seriously that our clips of Hawaii are all taken by Cindy Ma herself. We never filched other site's clips, and absolutely we didn't do such things as cover our logo on other site's.

首先，夏威夷的视频基地郑重声明绝对是由小马亲自拍摄的原创视频，不存在窃取别的网站视频加上基地LOGO之说，更没有下载其他网站的已经加了LOGO的视频再用基地的LOGO覆盖的说法。

And we also succeed in inosculating the technic of multithreading、 multiple buffers、 windows socket、 IP multicast and RTP real time transmission by using Visual C++6.0 and MS Directshow SDK, and obtained a good result. At the same time, we carried on researching the robustness of this software. We made the research findings of digital video transmission based on network used in applications of banks, and got very good social effects and economic benefit.

本文主要在以下方面做了深入的工作： 1、结合数字视频监控应用的需求分析，对研究网络视频传输技术的意义做了阐述和分析，并就如何充分利用现有网络资源和成熟的多媒体计算机技术进行视频监控等领域的具体应用做了有益的探索； 2、对&数字视频的网络传输&应用中所涉及到的关键技术进行了深入的分析、比较，并进行了有机的融合。

In this paper,AVS algorithms and complexity are first analyzed.Based on the analysis,an optimized real-time AVS(a Chinese next-generation audio?video coding standard)HDTV video decoder with HW?SW portioning is proposed.

从AVS视频标准算法和实现复杂度入手，提出一种AVS高清视频解码器软硬件分区结构，实现满足基准档次6.0级别的AVS高清视频码流的实时解码，支持灵活的音视频同步、错误恢复、缓冲区管理和系统控制机制。

Wang Fei: to identify a key part or a typical part of the video is the difficulties, the project's video collage algorithm choose the most representative and a high content of the visual quality of a video frame, and engage in good visual quality. It is easy Understudied of the quality, but not how to achieve the most representative analysis of the content.

王飞：视频剪切中对于视频关键部分或者说典型部分的识别应该是项目的难点，项目中的视频拼贴算法选择最有内容代表性和高视觉质量的一组视频帧，搞视觉质量还好理解，但不明白是如何实现最具有内容代表性的分析。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。