数字视频

The MPEG-2 compression algorithm is very sensitive to channel error due to the use of variable-length cod- ing.

1引言 作为通用的视频压缩国际标准MPEGZ在D、几，数字电视领域得到了广泛的应用。

The packet disassembly circuit inserts the portion into an absolute location of the buffer, the position identifier determining the location, the portion thereby synchronized with adjacent portions of the stream of digital audio/video data in the buffer to compensate for the variable periods of transmission time.

数据包拆卸电路把该部分插入到缓冲器的绝对位置上，位置标识符确定该位置，从而使该部分与缓冲器中的数字音频／视频数据的数据流的相邻部分同步，以补偿可变的传送时间周期。

Multimedia into the classroom to become a reality, and this all just a multimedia computer, a video graphics card collection, some with capture software, a digital camera, a scanner and a recorder will be able to easily complete .

使多媒体进入课堂成为现实，而这一切只需一台多媒体电脑、一个视频图形采集卡、一些具有抓图功能的软件、一部数字相机、一台扫描仪和一台刻录机就能轻松完成。

Finally, from the view point of recording high-fidelity data page, we optimized the storage system by using beam shaper in signal beam, and redesigning geometry to increase the uniformity of reference beam. In the final demonstration experiment, we encode 10KB Flash to four data pages, each including 512×512 bits. The data pages are 1:2 pixels matched. These four data pages were stored in a single point in a photopolymer media of Aprilis Corporation by using angle multiplexing method, and successfully retrieved.

根据我们设计的串行二进制数字数据与数据页之间的编解码方法，将一段10KB大小的Flash视频编码为4幅512×512幅面，1：2匹配的数据页，并成功的在美国Aprilis公司光致聚合物材料中完成了这4幅数据页的单点角度复用存储，再现数据页经过偏移补偿算法和PMSF算法处理后的平均原始误码率为2.4×10-4，这样低的误码率完全满足后期软解码的需要，并使得解码后的数据可以满足用户误码率的要求。

Come and meet us and 10 of our French hi-tech businesses on the Montpellier Languedoc-Roussillon Stand in Hall 8:COMPART : Fire Resistant ProtectionCORONIS SYSTEMS : Ultra Low Power wireless networksEMITECH : Electrical and electronics products certificationFOGALE NANOTECH : Precision measurement instrumentationGENESYS : audio, web et video conferencing systemsIMECA : Food processing equipmentINTERACTIVE DEVICE : wireless hardware productsLIGHTNICS : software editorSANGUINE MICROELECTRONICS : reverse engineering TMI ORION : wireless data loggers for harsh environmentsVKS : keyboards and systems

与我们一同前来2004年中国高新技术成果交易会的11家高新技术企业：COMPART ：新型防火材料CORONIS SYSTEMS ：无线数据传播产品EMITECH ：电器及电子产品证书FOGALE NANOTECH ：纳米测量仪器GENESYS：音频、视频及网络会议服务IMECA：农业加工工程INTERACTIVE DEVICE：无线通讯设备LIGHTNICS：数字图像改良软件SANGUINE MICROELECTRONICS：芯片反向分析TMI ORION：工业及环境严格测量仪器VKS：可设置专用键盘

It is a network terminal which is connected with digital television; it is used for transforming digital signals to analog signals. After decoding the digital constringent video and audio signals, it will engender analog video and audio signals. Consequently, it can provide high quality television program for audiences.

它是一种与电视机连接的网络终端设备，用于将数字电视信号转换成模拟信号，它通过对数字化压缩的图像声音信号进行解码还原，产生模拟视频和声音信号，以提供给观众高质量的电视节目。

According to the foreign media reports," World Media Summit ", Amercican news agencies, a Deputy CEO Tom Corrie, and the media giant News Corporation CEO Rupert Murdoch said that the search engines and other Internet service providers in various types of digital content (including text, pictures, and video, and so on), you should pay to the content provider.

据国外媒体报道，在&世界媒体峰会&上，美国知名新闻服务机构美联社CEO汤姆·柯利和媒体巨头新闻集团CEO鲁珀特·默多克皆表示，搜索引擎及其他互联网服务商在使用各类数字内容(包括文字、图片和视频等)时，应该向内容提供商付费。

The light of incidence goes into CCD, reflected by ichnographic mirror and thrilling through lens, and is transformed to digital signal by video processing circuit.

入射光经光学系统后，照射在CCD敏感元件，经视频处理电路处理后形成数字图像信号。

Who communicates by letter, business synthesizing service as a telecommunication , data and information network to be in motion and do business, advantage , broad customer resource and fine cooperation concern the have distinctive telecommunication background , tremendous technology and fund, The company is engaged in synthetical telecommunication serving , synthesizing information service , broadband access , computer network information system integration , intelligent building structure-rization synthetical arrangement of wire system , building world automation navar , data telephone programme-controlled telephone switching boards system , video frequency convention system and so on mainly; Be in the data communication field , the new net of halo especially .

北京光环新网数字技术有限公司是北京通信光环电信集团下属的一家股份制公司，作为一个电信、数据和信息网络综合服务运营商，具有独特的电信背景、雄厚的技术和资金优势、广泛的客户资源和良好的合作关系，公司主要从事综合电信服务、综合信息服务、宽带接入、计算机网络信息系统集成、智能大厦结构化综合布线系统、楼宇自动化控制系统、数据电话程控交换机系统、视频会议系统等；尤其在数据通讯领域，光环新网公司拥有其它公司无法比拟的综合技术实力和线路网络资源优势。

Methods （1）310 patients of experimental group were performed with digital cine coronary arteriography,each of vascular edge of both the normal and the strictured segment was marked referring to the diameter of catheter,analysed the percentage of geometic stenosis,density contrast and stenosis length with computer.

（1）实验组310例完成数字电影冠状动脉造影后，以插入的导管管径为参照物，逐一标示正常段和狭窄段血管边缘，经计算机分析计算几何狭窄百分率、视频密度差异百分率和狭窄段长度。

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。