Finally , the actual technologies of the computer ' s automatic making up examination paper , the data compress , the client database and the irreversibility of the examinee ' s answer are studied , which are key problems of the distant test system 考虑到试题库建设已有相当的规模，系统设计了专门的模块，可方便地将已有试题顺利导入试题库。
Firstly , four alternative mode was introduces for h . 263 data compress arithmetic : the mode of nonrestrictive sportive vector , syntax - based arithmetic coding mode , the mode of supernal forecast , and the mode of pb frame 首先详细介绍了数据压缩算法h . 263以及h . 263算法的四个可选模式:非限制运动矢量模式;基于语法的算术编码模式;高级预测模式; pb帧模式。
System frame is the clue of this paper . this paper puts the emphases on methods of image data compressing , gprs net and the implementing of image collecting terminal . system control terminal on pc is also introduced 本文以无线图像监控系统开发的整体框架为线索，着重阐述了图像数据的压缩方法、 gprs无线网络通讯及图像采集终端的实现，简单介绍了系统管理终端在pc机上的实现。
The real time server is described first , which emphasizes on some key points such as entry control , the design of data frames and cache control . it shows the effect of data compressing to the progress of multimedia application vigorously 在实时服务器端的解说中，阐述了接入控制、数据帧设计、缓冲控制等技术的关键点，并展示了数据压缩技术的发展对多媒体应用的巨大推动作用。
On the aspect of data network transfer , there is a network transfer protocol for geographic data ? dtp in the paper , and the protocol has been realized on windows 2000 by using socket . the geographic data compress method has been studyed in - depth 在数据的网络化调度中，针对sde的网络化进行了深入研究，提出了一种面向空间数据传输的网络协议sdtp ，并在windows2000上使用socket实现了该协议，对协议中的空间数据压缩问题作了一定的研究。
With the rapid development of modern society , requirements for information data have been increasingly upgraded both in our daily life and work fields , namely that information technology is required to meet new standard . an effective method to deal with this problem is data compress encode 随着社会的不断发展,在日常工作和生活中需要传递的信息量也在不断增加,这对通信技术提出新的要求,而数据压缩编码则是解决这个问题一个非常有效的方法。
It is significant in both theoretics and practicality to combine the motion estimate technique and research of data compressed coding to solve the problem of huge information data in video , which is an important question for discussion in image processing field and image communication field 利用运动估计技术，结合对数据压缩编码的研究，解决视频消息数据量大的问题，具有重要的理论和实际意义，是一个图像处理领域和图像通信领域极其重要的研究课题。
During the latest 20 years , great progress has been made in the theory , method and technology of image - compression coding on the basis of such traditional coding methods as coding forecast and exchanger coding etc ; wavelet transformation has been widely used in signal - disposal field , because it has a characteristic of energy focus , it puts forwards a concept of multi - resolution ration analysis and the realization o f algorithm about wavelet decompose and fast rebuild . among the applications of wavelet analysis , it is rather mature to apply it to image - data compressing 近20年来，在预测编码、变换编码和其它传统编码方法的基础上，图像压缩编码的理论、方法和技术取得了较大进展；其中小波编码算法因其能量集中特性、多分辨分析概念的提出和小波分解与重构快速算法的实现，使得小波变换在信号处理领域得到了广泛的应用，小波分析应用于图像数据压缩是小波分析应用的一个比较成熟的方面。
In the first part of the paper we want to present the architecture of wireless meeting system and applied skills based on practical requirements . secondly key technologies applied for both aspects are discussed respectively , including ieee802 . 11 protocol , mfc programming , evc development , audio data compressing and directsound application 文章的首先介绍从实际要求出发,无线会议系统的结构及其相关技术;然后详细介绍软硬件技术要素,包括ieee802 . 11协议; mfc编程; evc编程;音频信号压缩及directsound技术等等。
The article illuminates mainly two segments color - separation model based on three dimensions , gives a model conception on a knowledge base of unification technology and analyse and design digital prepress system from the whole on the problem of systemic requirement analysis . second , the article brings forward new data compress method based on memory stream and sets up new data structure to realize undo and redo methods based on analyzing all kinds of datas referred to on systemic based construction . because printing and dyeing cad system deals with many arithmetics on graphics ans image and production technics , the article illuminates vector conception , expatiates gray graphic vectorization and brings forward to graphic component ' s conception to enhangce the systemic stability and manipulating speed and improve graphic transmission 在印染cad系统的需求分析问题中，结合目前印染行业的发展和实际cad系统的整体构架，着重阐述了基于三维空间的二段法分色模型，提出了一体化工艺知识库这个模型的概念，对数字印前系统做了整体的分析、设计在系统的底层架构问题上，着重分析了cad系统涉及到的各类数据，提出一种新型的基于内存流的数据压缩方法，同时设计了自己的数据结构，用以实现系统的undo 、 redo操作，由于整个系统涉及众多的图形图像算法和实际工艺，为了提高系统的稳定性和操作速度，以及增强图像的网络传输功能，在部分算法中采用了矢量的概念，着重讲解了灰度图像矢量化，并且提出了图像组件这一崭新的概念。
