数字视频

Based on the embedded system and cipher technology, a digital speech scrambler is designed and realized in this thesis which can security transmit speech, video, fax and data.

本文利用嵌入式系统技术和密码学技术，利用现有的PSTN或ISDN，采用先进的分组加密算法，设计实现了基于EPSON 33209 体系的数字语音保密电话，实现语音、视频、传真及数据的安全传输。

Q: Can I submit digital and/or video work?

问：我可以提交数字和/或视频的工作吗？

With the rapid development of computer and communications, digital video has played a more and more important role in the information society.

随着计算机技术和通信技术的迅速发展，数字图像和视频在信息社会中发挥着越来越重要的作用。

Digital image and video processing algorithms in research and development, and its modular design to achieve.

数字图象及视频处理算法的研究开发，及其模块设计实现。

Images can be generated by video digitizer cards that capture NTSC analog signals and create a digital image.

用视频数字化卡可以捕获NTSC制式或PAL制式的电视模拟信号并生成数字图像。

Finally a all-digital recorder system based on RAID5 which has a RT-Linux real-time software operation system and intermediate/video frequency acquisition card driver to overcome such problems as real-time quality reliability chunnel expansibility and standardization.

最终提出了以RT-Linux实时操作系统为软件平台和专门设计的中频和视频采集卡驱动为底层硬件平台的基于RAID5阵列的全数字记录系统，全面解决了记录实时性、可靠性以及通道扩展性和标准化的技术难题。

There is no definition of the electronic evidence provided by laws, and the electronic evidence discussing here is computer evidence, which is generated in the operating process of computer or network system, stored as digital format in the computer memory or external storage medium, and testifying the facts by its digital data or information. It is manifested as E-mail, electronic bulletin board, electronic document, electronic signature, electronic chatting record, web-page, web-video, database, etc.

我国法律法规对电子证据并无定义，本文探讨的电子证据是指计算机证据，即在计算机系统或者网络系统运行过程中产生的、以数字形式保存在计算机存储器或外部存储介质中、能够证明案件真实情况的电子数据或信息，其表现为电子邮件、电子公告板、电子文档、电子签名、电子聊天记录、网页、网络视频、数据库等多种形式。

Vidicon collect simulate image in period of time and send to computer or DSP chip through video collection card digitlization,use computer to gain eyewinker and process digital image processing:using image area segment and boder measure to calculate area and perimeter;using image smoothness to wipp offthe infection of yawp;using dynamic background and image suited technology to overcome the infection of ray;calculation the parameter of eyewinker(area, perimeter,round measurement, proportion characer and invariant monent),using least norm to design the linearity classify parts,using image matching technologyto classify eyewinker,and to judge whether the eyewinker is harmful to diff background,if the eyewinker satisfy the character require of harmful object ,system will auto-stsrt alarm device. If there ia not have found any eyewinker, Vidicon will collect new simulate image and make processing.

本设计是将摄像机或高频头采集到的模拟图像经过视频采集卡数字化后送入计算机或DSP芯片，利用计算机对采集到的一定时间段内的图像进行异物获取，并对异物图像进行数字图像处理：利用图像区域分割和边缘检测以便进行面积和周长的计算，利用图像平滑去除噪声的影响，利用动态背景运动检测法和图像配准技术克服光线的影响，并通过异物的各类参数（如面积、周长、圆形度、比例特征和不变矩等）的计算，采用最小范数分类法设计了线性分类器，利用图像匹配技术对异物进行分类，从而判断异物是否有害，针对于不同的背景，若异物满足有害物体的特征要求，则认为物体有害，自动启动报警装置，如果没有发现有害异物则新摄入的图像将取代前一时间段的图像再进行图像处理。

You can put any figure on the top of all extracted video segments.

你可以把任何的数字上方的所有提取的视频部分。

The Dawning/2000 Supercomputer is a general purpose parallel computer with the scalable cluster architecture, which supports technical computing, network service and data processing applications.In this paper, the design goals of the system software of Dawning/2000 are introduced.

引 言今天，可扩展的并行计算机系统正广泛地应用于需要更高性能的应用领域，如传统的科学与工程计算应用、决策支持和事务处理等商业计算应用、大型信息服务和网络服务、数字图书馆和视频多媒体系统。

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。