可视电话

引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。

IntroductionIn the communication systems , echo and noise will seriously affect speech communication quality , such as IP telephone , videophone and hand-free digital cell phone systems etc.

正是在这种背景下，我们设计了H.323协议下支持可视电话多点会议的MCU（多点控制单元）。

Under this background , we designed this H.323 based MCU to support multipoint conference for videophone conference system .

基于Web的可视电话号码申请与管理系统的设计与实现

Design and Implementation of Video Phone Number Applying and Managing System Based on Web

IP可视电话的视频编码及码率控制的研究

The Research of IP Video Phone 's Video Encoder and Rate Control

IP可视电话系统中视频压缩技术的研究

Video Compression Technology for Visual IP Telephony 's System

基于PC的可视电话音频视频子系统的实现

Realization of Audio and Video Subsystem in Video Phone Based on PC

基于DSP的二网融合的可视电话系统

Video Phone System for Integration of PSTN and Internet Based on DSP

基于DSP的数字可视电话系统设计

Design of Digital Video Telephone System Based on DSP

基于DSP的IP可视电话终端开发

Development of IP Videophone Terminal Based on DSP

QoS可控的网络可视电话设计与实现

Design and Realization of Internet Video Phone with QoS Guarantee

3G移动可视电话系统通信传输单元设计

Design on Communication Transmission Unit of 3G Mobile Video Telephone System

基于媒体处理器的SIP可视电话的研究与实现

Designing and Implementation of SIP Video Phone Based on Multimedia Processor

基于ATM网络的多媒体可视电话系统设计

Implementation of Multimedia Videophone System Based on ATM Network

基于SIP网络可视电话的原理与实现

Theory and Implementation of Internet Visual Phone Based on SIP

实现基于H.323协议的IP可视电话终端

Implementation of IP Video Telephone Terminal Based on H.323

目前我国三大电信运营商都已经构建基于IP的视讯会议业务网，覆盖国内大多数城市，主要提供视讯会议和可视电话等业务。

At present , the three major operators in China have established IP-based business networks which cover most large cities .

可视电话系统的QoS管理

QoS management in video phone system

DSP/BIOS下VOIP可视电话的系统调度与控制研究

Schedule and Control of VOIP Video Telephone on DSP / BIOS

所以作为代表可视电话的视频通信将成为信息社会发展的必然趋势。与此同时3G的发展将提供新的动力促进IP可视电话的发展。

Therefore , the IP Videophone will become an inevitable trend of information development as the representative communications .

PPPoE接口驱动在IP可视电话系统的设计与实现

Design and Implementation of PPPoE Interface Driver in IP Video Telephone System

通过PC机与ARM仿真板的通信对本文实现的系统进行了仿真模拟实验，对可视电话的基本功能和性能进行了测试。

Simulation test is performed by communication between PC and ARM emulator to evaluate the function and performance of the video phone system .

从Android的主要特点和整体架构方面，具体的介绍了Android平台，并且对本文中设计开发的可视电话所基于的硬件系统方案进行了介绍，对此款智能手机的硬件设计方案进行了综述。

And the design of videophone based on hardware system scheme is presented and reviewed in this paper .

ISDN可视电话模型设计与实现策略

A Design Model of ISDN Videophone and Its Implementation Politics

介绍了PSTN可视电话和V。

This paper introduces the basic principle of PSTN video_phone and V.80 protocol .

基于PC的H.324可视电话系统的实现

The Realization of H.324 Videophone Based PC

文中最后给出PPPoE的个典型应用实例IP可视电话，将PPPoE应用在IP可视电话中，实现了嵌入式多媒体终端的宽带接入。

Finally , applying PPPoE to IP videophone realizes the embedded system communication in broadband access mode .

利用实验室现有的实验环境，设计并基本完成了一种基于局域网的PCTOPC可视电话语音部分的编程；

Depended on the existed experimental environment , the program of voice part of PC to PC video telephone terminal based on LAN is designed and implemented ;

随着3G网络的覆盖和开放源码的Android操作系统的出现，为可视电话的出现和广泛推广，提供了坚实的基础。

The 3G network coverage and the Android operating system with open source play important roles for the appearance of video telephony .

使用ISDN基本接口的可视电话

Visual Telephony as an ISDN BRI Application

它在IP电话、可视电话及免提的数字蜂窝电话等扬声器/传声器通信系统中也具有广阔的应用前景。

It has also widely promising applications for speaker / microphone communication systems , such as IP phone , videophone and hand-free digital cellular telephony system , and so on .