利用Jainsip库开发的SIP客户端样例，适合初学者使用

基于VOCAL协议栈的SIP用户代理端，可以在linux下进行SIP呼叫-invisible protocol stack based on the SIP user agent side, the under linux SIP Call

音视频聊天演示程序。聊天双方一个作为服务器，一个作为客户机。客户 机呼叫服务器建立连接之后，即可进行音视频聊天――双方都可以看到对方的图像， 可以听到对方的声音。 要求的系统配置：USB摄像头或数码摄像机，声卡，麦克风等。-Audio and video chat demo. Both sides as a chat server as a client. Client calls the server after establishing a connection, you can conduct audio and video chat- both sides can see each other

2.0说明 1.0支持系统的录音多种格式,有一定的延时,没有过滤杂音功能. 2.0已取消支持系统的录音多种格式,使用PCM采集数据G711A压缩格式(8000HZ单声道16位格式录音每秒以8K完成数据,16000HZ单声道16位格式录音每秒以11K完成数据,音质相当好),延时降低到最小100-500MS以内,不会随时间增加而增加延时(如果是说话测试一直保持200MS的延时,如果是用播放歌曲来测试,有自动校正延时功能,恢复成200MS的延时,恢复过程中不会中断歌曲的播放,只是小小加快唱歌的速度,听觉不会觉察出来),加入了过滤杂音功能. 2.0安装 将ACMG711.dll复制到系统文件夹里 再安装控件 -2.0 1.0 Note recording system to support multiple formats, a certain delay, no noise filtering function. 2.0 support system has been abolished recording formats, the use of PCM data acquisition G711A compression format (8000HZ 16 mono recording format to 8K per second complete data 16000HZ mono recording format 16 to 11K per second complete data quality is very good), Delay reduced to the minimum 100-500MS within not with time delay increases (if word has been tested 200MS delay, If it is used to test play the songs, the automatic correction function of delay, 200MS resume into the delay, the recovery process will not be interrupted play songs, singing just a small speed up

H.323简要说明-A brief description of H.323

ITU的g729a编码库，可以将pcm转化为g.729格式-ITU G729 annex A lib file ,can transfer PCM file format to G729 format.

vic语音编解码标准，应用于voip系统-speech codec standard applied voip system

一个非常不错的点对点视频会议系统的简单实现，界面简洁，但基本功能都有了。-A very good point-to-point video conferencing system to achieve a simple, clean interface, but the basic functions of everything.

RTC下接收呼叫的例子（如果是VC用户，请新建一个APPLICATION 32空工程，然后，用ADD FILE的方法把所有的文件包含在工程中编译）-RTC receive calls example (If yes VC users, a new air APPLICATION 32 works, and then use the ADD FILE all the documents included in the project compiler)

一个用VC写的电话会议的系统.能够在少于四人的情况下实现高质量的语音效果,用语言实现了语音的混频-It is a video conference software writted by VC++. It show the perfect performance even when 4 people talk at the same time. voice mixing technolog be used.

一个ip电话实例的实现，以vc为开发环境。-an example of the realization of telephone, vc for the development environment.