音頻呼叫 的英文怎麼說
中文拼音 [yīnbīnhūjiào]
音頻呼叫
英文
voice frequency call-
Provides capacity and performance testing of the network for audio quality, call signaling, and endpoint robustness
提供網路的容量和性能測試，用於音頻質量、呼叫信令和端點的健全性。Section ii describes the design approach and implementation of speech module on mcf5249 coldfire core. the speech codec optimizes g. 729a codes and added voice activity detection of g. 729b to save bandwidth ; the implementation of acoustic echo cancellation uses nlms algorithm and it can reduce echo though designing adaptive fir filter and speech detector ; the dtmf and cpt generate signal using two second order digital sinusoidal oscillators and detect signal by picking up the frequency information. but only get the frequency information is not enough in cpt detector, this thesis introduces a method
其中對語音編解碼器的設計採用優化g . 729a代碼達到設計要求，並在此基礎上加入g . 729b的靜音檢測模塊，以進一步降低網路傳輸帶寬;對回聲消除器的設計採用nlms演算法，通過設計自適應fir濾波器和語音檢測器達到回聲消除目的;對雙音多頻設計，信號發生端採用構造靜態參數表並通過二階正弦振蕩器產生信號，信號檢測端提取頻率信息以檢測信號;對呼叫進程音設計，除了類似雙音多頻的信號發生及頻率檢測設計外，還需要檢測信號持續時間，作者設計了一種基於匹配狀態表的方法以檢測信號持續時間。It can provide many functions : the conversion between transfer formats, the conversion between communication protocols, the conversion between analog signals and digital signals, the conversion of control commands, real time audio code / decode, ip call control, control of rtp / rtcp, call detail logs, accounting and some of gatekeeper ' s functions such as address tansfer / search.
它提供以下功能：傳輸格式間的轉換，通信規程間的轉換，音頻、數據格式轉換，呼叫控制信令的轉換，對pstn的呼叫控制功能， pstn電路交換功能，實時語音處理語音壓縮功能， ip網路呼叫控制功能，對實時對話協議rtp rtcp的控制功能，呼叫日誌，計費功能，還包括關守的地址翻譯搜索等功能。The speech processing module can be divided into two parts, the first part includes speech compression, voice activity detection and echo cancellation module, which improve speech quality ; the other part includes dtmf and cpt module, which generate and detect some necessary telephony signal in the communication. this thesis is organized as follows
該語音處理模塊由兩部分組成，一方面是對語音的處理，包括語音壓縮模塊、靜音處理模塊和回聲消除模塊，主要為了提高voip的語音質量;另一方面是對電話通信的控制和處理，包括雙音多頻模塊和呼叫進程音模塊，主要為了產生和檢測ip電話通信中一些必須的電話信號。Developers and service providers can verify endpoint connectivity for audio and video calls
開發人員和服務供應商可以驗證音頻和視頻呼叫的端點連接性。Telecommunications - network to customer installation interfaces - analog voicegrade switched access lines with calling number delivery, calling name delivery, or visual message waiting indicator features
電信.網路和用戶裝置間的介面.帶呼叫號碼傳送呼叫姓名傳送或可視信息等待顯示功能的模擬音頻轉換訪問線路Telecommunications - network and customer installation interfaces - analog voicegrade switched access lines with the call waiting, distinctive call waiting, or calling identity delivery on call waiting feature
電信.網路和用戶裝置間的介面.帶呼叫延時區別性呼叫延時或呼叫延時中呼叫身份傳送功能的模擬音頻轉換訪問線路Methods of measurements of audio - frequency band and simulated systems for selective calling equipment used in the mobile services
移動通信選擇呼叫設備音頻段和模擬系統測量方法Layout : full screen / top screen - defines how the video - ringtone will be shown ; if the full screen layout is selected, the ringtone will show on top of standard caller information with extended information about the caller
外部顯示:全屏/頂部- - -設定音像視頻怎樣顯示.如果選擇了全屏顯示，那麼音像視頻就會在呼叫者一般信息之上還會顯示其他的信息Once a call session is defined, incremental parameter changes can be made quickly. call files and individual call attributes can easily be modified or fine tuned using a simple, familiar spreadsheet type interface
話音和視頻呼叫採用各自的呼叫控制和參數選擇菜單進行編程。呼叫文件和各個呼叫特性可以方便地採用簡單熟悉的電子表格型界面修改或調整。The softswitch is the core technology of the next generation network, for it can be the core to offer calling, control and service for voice service, data service and video service in the next generation network, and it also plays the key role in the evolvement of scn to the psn
軟交換是下一代網路的核心技術，因為它可以成為下一代分組網路中為語音業務、數據業務和視頻業務提供呼叫、控制和業務的核心，同時也是電路交換網向分組網演進的關鍵。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。Through this local system, manager can access to the higher level of governmental network system about safety production information. this local system also makes it possible to simultaneously transmit video / audio signals and collect data information through the same hardware device. in addition to its other functions, this system contains a management center that creatively introduced some advanced function model such as the call center, rescue plan for the emergency accidents
本文充分結合安全生產領域的特定要求，對分散式數字監控系統在安全生產管理中的應用進行了深入研究，首次提出把政府安全生產監督管理功能與企業安全生產監控系統相集成，構建了市（縣）級安全生產管理系統，形成覆蓋全市（縣）的安全生產監控管理數字網路系統；並可進入更上層的政府安全生產信息網路系統；同時實現了通過同一硬體裝置同時傳輸視頻音頻及實時採集的數據信息：在管理中心還創造性地引入了呼叫舉報中心、應急救援決策中心，使該系統能夠切實為安全生產管理部門服務。分享友人