基于Android的視頻通話系統的設計與實現

基于Android的視頻通話系統的設計與實現摘 要近年來，智能手機操作系統發展迅速，尤其是Android系統的迅猛發展已經將全球智能手機市場引領到了非常火爆的狀態。隨著手機社交網絡、手機多媒體通信和手機游戲等應用程序不斷被開發出來，各種基于智能手機操作系統的應用程序正在逐漸影響和改變人們的生活方式。實時視頻流技術在可視電話、遠程教育、視頻點播等方面得到了廣泛的應用。本文設計并實現的基于Android的視頻通話系統采用C/S架構，包括PC和手機兩個客戶端。手機端使用Android2.3操作系統。本系統共包含四個子系統：PC端接收子系統、發送子系統，Android端接收子系統、發送子系統。接收子系統實現數據接收、轉碼和呈現，發送子系統現實數據采集、編碼壓縮和數據發送。PC端基于JMF框架來實現，Android端使用Android Camera類及其相關類來實現。本文對國內外視頻通話的研究情況以及今后的發展前景，對實現視頻通話所涉及到的協議和相關技術進行了分析，在此基礎上提出了一種可行的網絡視頻通話設計方案，并通過需求分析、詳細設計、編碼實現、單元測試以及集成測試等過程完成了本系統的設計與實現。本系統實現了跨平臺視頻通話，使PC與Android之間的視頻通話成為了可能，可以起到豐富人們日常生活交流和娛樂方式的作用。關鍵詞：Android，視頻通話，JMF，PC，RTP/RTCPDesign and Implementation of an Android-Based Video Calling SystemAbstractIn recent years, the rapid development of smart phone operating system, especially Android system, has led the global smart phone market into explosion state. With some application such as mobile social networking, mobile media communications and mobile games being continually developed, a variety of application on smart phone operation systems are increasingly affecting and changing people’s lifestyles. The real-time video streams technology is used widely in such aspects as videophone, distance education and video on demand.The system based on android uses c/s architecture. It includes two clients. One is on the Windows system, the other one is on the Android 2.3 system. There are four subsystems. Each of clients has a send subsystem and a receiver subsystem. The main function of the receiver subsystem is to receiver data from internet and decodes that data. After that, it will display that data as soon as possible. The main function of the send subsystem is to collect data from camera and then encodes the data. After that, the data will be sanded to the Internet. On the PC client, we use the JMF framework. One the Android client, we use Android API. This paper firstly introduces the research condition of the video call and development tendency. It analysis some technologies about the video calling system a

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