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visualc程序設(shè)計(jì)外文翻譯-資料下載頁(yè)

2025-05-12 18:12本頁(yè)面

【導(dǎo)讀】計(jì)算機(jī)發(fā)展的一塊巨大領(lǐng)域。Windowsxp/vista是目前主流圖形化操作系統(tǒng),運(yùn)。各樣功能強(qiáng),速度快的應(yīng)用軟件的進(jìn)一步需求。目前有一種對(duì)microsoft所取得。VC++是操作系統(tǒng)中快速應(yīng)用開(kāi)發(fā)環(huán)境的最新版本。Windows平臺(tái)上第一個(gè)全面支持最新WEB服務(wù)的快速開(kāi)發(fā)工具。VC++RAD壞境,包括XML(擴(kuò)展。服務(wù)器描述語(yǔ)言)等。用于種類(lèi)應(yīng)用程序設(shè)計(jì)。廣大程序開(kāi)發(fā)人員的好評(píng)。尤其是VC++對(duì)數(shù)據(jù)庫(kù)應(yīng)用的強(qiáng)大支持,大大提。各種圖像現(xiàn)在已能與組合框中的項(xiàng)相關(guān)聯(lián),而且可以利用擴(kuò)充的。組合框控件將圖像顯示在組合選擇框中和下列列表中。面向?qū)ο篌w系結(jié)構(gòu)技術(shù)有助于創(chuàng)建行業(yè)性軟件開(kāi)發(fā)機(jī)構(gòu)。統(tǒng)的數(shù)據(jù)結(jié)構(gòu)中加入一些被稱(chēng)為成員函數(shù)的過(guò)程,因而賦予對(duì)象以動(dòng)作。BMP是bitmap的縮寫(xiě),即為位圖圖片。從總體上看,Windows位圖文件格式的缺點(diǎn)超過(guò)了它的優(yōu)點(diǎn)。優(yōu)點(diǎn):BMP支持1位到24位顏色色深度。BMP文件不受WEB瀏覽器支持。電話和電報(bào)的發(fā)明,使遠(yuǎn)地的人們可以立即傳送聲音和文檔。然而,除了言語(yǔ)的

  

【正文】 main application at home and abroad are: Business Communication Business Conference Enterprise customer service and product development Distance learning and technical training Market research and intelligence gathering Telemedicine and consultation Cooperation in scientific research and engineering design Multinational application Staff recruitment From the current perspective of the development, research on a lot of video conferencing technology, the products are very rich, although very attractive video conferencing system has broad prospects, but in this area there are considerable technical issues to be resolved, video conferencing systems at this stage of practicality, versatility and friendliness of the relevant technologies and related issues: software technology, database technology, work technology, sharing of technology, resource control, security technology and technology conference model. (3) The main research topics is the way of software, with the necessary peripherals to achieve a small video conferencing system. 2, the basic principles of video conferencing systems Video Conferencing (VideoConference) system is the basic definition: two or more individuals or groups of different geographic location, through the transmission line and multimedia equipment, the sound, image, video, interactive video and file transfer data, to instant and interactive munication in order to plete the purpose of the conference system. Be read from above, video conferencing is a typical multimedia munications, the next diagram is a diagram of a typical video conferencing system: Figure A typical schematic of a video conferencing system From the above diagram we can basically tell, the video conferencing system has three main ponents, namely, munication works, conferencing terminals and multipoint control unit. Video conferencing systems and puter technology is essentially the product of bining munication technology, so the munication work is based video conferencing system ponent of the terminal session is video, audio, data, signaling, and so a variety of digital signals, respectively after bined into the posite digital stream, and then transforms to a code with the user Network patible interface, in line with the provisions of the transmission work of the frame structure of the channel to send the channel signal format for transmission. Multipoint control unit is multipoint video conferencing system, audiovisual information for transmission and switching part, which is based on certain criteria for audiovisual signal processing, and on request allocation of each channel to be connected, but it is not necessary for video conferencing. (1) Communication work is a series of devices, institutions and processes, through them, attached to the end user devices on the work can be a meaningful exchange of information. It relates to the work transport protocol, work programming interfaces and so on. (4) Video conferencing system has undertaken a variety of media terminal device information input, output and processing, and the connection between the user and work, interact and control a number of tasks. It belongs to the user digital munication equipment, in the system at the user39。s audio, data input / output devices and works. (1) Sometimes the need for video conferencing between multiple points of information transmission and exchange, then you can control unit by means of multipoint (MCU) to achieve. Multipoint control unit is actually a multimedia information exchange, multipoint call and connection, to achieve video broadcasting, video selection, audio mixing, data broadcasting and other functions, the pletion signal of the terminal tandem with the switch. MCU signals sent by the various terminals to separate, extract audio, video, data and signaling, respectively, corresponding to the processing unit, or switch audio mixing, video switching, data broadcasting, routing, session control, timing, and call processing, the processed signal from the multiplexer in accordance with the format, framing, and then sent to the designated port by the work interface. (5)
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