multithread processing 中文意思是什麼
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As the information era proceeds, highly developed digital image processing technique and communication technique make multimedia communication possible, and it is now on the way of progress. video conference have received more attention as an example of multimedia. in this paper we first describe the construction and characteristic of the video conference system and analyze the theory of protocol with itu - t h. 323 recommendation which inculde video and audio codec standard, communication control protocol h. 245. call signalling protocol h. 225, as well as procedures within these protocols define how these components communicate. also an experimental video conferencing system is designed and some relating key technologies are studied, which include multithread programming, transmission technology, mcu technology, qos mechanism and so on. especially, a video codec based on h. 263 recommendation with high fram rate as well as high compression ratio is researched and implemented because of importance of video application, which solves the bad image reconstrction quality problem existed in the most present video systems that adopt h. 261 video compression algorithm. by using these technologies. a video conferencing system is implemented based on lan. the system that the paper provides is easy to implement and the results of exmperiment is good. such system can be widely used in the fields such as business conference, distance education etc. and it is of good practical value
隨著信息時代的前進，數字圖像處理技術和通信技術的高度發展，多媒體通信已成為可能並已初具規模，視頻會議作為它的一個具體應用實例受到普遍關注。本文首先對國際電信聯盟itu - t制定的基於分組交換的多媒體通信h . 323系列建議進行了闡述，其中包括ip網路視頻會議系統的結構組成、視頻傳輸標準、音頻傳輸標準、系統的信息碼流、通信控制協議h . 245和呼叫信令協議h . 225以及會議系統的進行過程。在此基礎上給出了ip視頻會議的實現的整體框架，為系統的軟體實現進行了模塊的劃分和整體設計，分析了各個模塊的功能、作用。 -
The software function modules, such as data acquisition, data processing, human - machine interface and data management, are introduced. the crucial software design concepts of using multithread and double buffers for exchanging data are emphasized. the data transmission between the data collecting site and supervision center is implemented for constructing a distribute supervision system based on the network
本文分析了電能質量在線分析儀設計中的各種問題以及解決的方法；介紹了軟體系統中數據採集、數據處理、人機交互和數據管理等四個模塊的功能和實現；詳細說明了如何利用多線程的編程方法和雙緩沖區的數據交換方式，實現對電能質量各個技術指標的實時監測、記錄和分析；實現了在數據採集點和監控中心之間數據的傳輸，並在此基礎上設計了基於網路的分散式電能質量測試系統。 -
In the realization of foundation, this paper discusses windows multithread processing and realization process of socket thoroughly, and researches working flow of voice network transmission. then the paper unifies preliminary audio function and callback function, and designs the data structures which can be used in voice transmission, in this way, audio data collection and audio broadcast can be realized. finally, the paper gives realization steps of audio compression and decompression
2 .在底層實現中，深入探討windows多線程處理和套接字實現過程，研究語音網路傳輸的工作流程;結合低級音頻函數和回調函數，設計音頻傳輸中將用到的數據結構，實現音頻數據採集和音頻播放;具體給出音頻壓縮和解壓縮的實現步驟。
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