audio compression and codec 中文意思是什麼
audio compression and codec
解釋
音頻壓縮和編解碼- audio : adj. 【無線電】聽覺的，聲音的，音頻的；成音的。
- compression : n. 1. 壓縮；壓緊；濃縮，緊縮。2. 加壓；壓抑。3. （表現的）簡練。4. 應壓試驗。
- and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
- codec : 編碼器譯碼器
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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。 -
Based on the system, i discuss the method of developing net programs with delphi and introduce the software codec in windows and the software interface for codec, audio compression manager and video compression manager to perform real - time audio and video processing. audio captures and video captures based on directshow and video display based on directdraw are introduced. we also discuss the method of synchronization for audio and video and the method of developing own component with delphi
重點討論了利用delphi開發網路程序的方法： windows環境下用於壓縮多媒體數據的音頻視頻軟體壓縮解壓縮器（ codec ）及相應的軟體介面音頻壓縮管理器（ acm ）和視頻壓縮管理器（ vcm ） ；音頻採集技術和基於directshow技術的視頻採集技術；基於directdraw技術的視頻顯示技術；多媒體視頻會議系統中實現音頻和視頻同步的方法；利用delphi開發自定義組件的方法，並給出了相應的delphi程序實例。
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