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| 基于DSP的二网融合的可视电话系统 | |
| 引用本文： | 石硕,李久仲,郭庚麒,李洛,陈建国.基于DSP的二网融合的可视电话系统[J].电视技术,2009,33(8). |
| 作者姓名： | 石硕 李久仲 郭庚麒 李洛 陈建国 |
| 作者单位： | 1. 广东轻工职业技术学院,计算机系,广东,广州,510300 2. 广东交通职业技术学院,计算机系,广东,广州,510306 3. 广州加晋信息技术有限公司,广东,广州,510300 |
| 基金项目： | 广东省科技计划项目(2007B080701005) |
| 摘 要： | 为实现话音无阻塞、视频图像清晰流畅且低延迟的可视通话,提出使用PSTN单独传送话音,使用IP网络单独传送通话者视频并在终端同步还原的方法及其DSP实现的要点,终端以PSTN的拨号呼叫信号或来电振铃信号作为视频呼叫的触发信号,并将其捕获封装为SIP的Invite消息发起呼叫以建立视频P2P连接,使用UDP报文传送RTP视频流。测试表明系统在带宽为256Kbit/s且IP网络无拥塞的条件下,视频实现了CIF分辨力,帧频30f/s(帧/秒),视频延迟小于60ms,通话话音无阻塞,且话音通信与任何现有话音终端兼容,用户使用习惯如电话号码和拨号方式则不需任何改变。 |
| 关 键 词： | 可视电话 二网融合 无阻塞 低延迟 |
Video Phone System for Integration of PSTN and Internet Based on DSP |
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| SHI Shuo,LI Jiu-zhong,GUO Geng-qi,LI Luo,CHEN Jian-guo.Video Phone System for Integration of PSTN and Internet Based on DSP[J].Tv Engineering,2009,33(8). | |
| Authors: | SHI Shuo LI Jiu-zhong GUO Geng-qi LI Luo CHEN Jian-guo |
| Affiliation: | 1.Department of Computing Technology;Guangdong Industry Technical College;Guangzhou 510300;China;2.Department of Computing Technology;Guangdong Communication Polytechnic College;Guangzhou 510306;3.Guangzhou Jiajin Information Technology Co.;Ltd.;China |
| Abstract: | A video phone system which integrates the advantages of PSTN and IP network and its implementation method is proposed.The system consists of terminals and supporting servers.Separately,the voice is transmitted over PSTN and the video image is sent over Internet and they are restored simultaneously in the terminal to achieve calls of non-blocking voice,clear and smooth and low-latency video images.And its voice communication is compatible with any existing voice terminals.The terminal captures and put the di... |
| Keywords: | video phone PSTN and Internet integration non-blocking low-delay |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |