Research And Implementation Of Ip Video Telephone System Based On The Campus Network

The queen appears on telephone , people can see the other party's appearance right away while hope communicating by phone since. But since restricting , this desire accepting the requirement and the economic situation allows many years to come true. Now, with the fact that science and technology progress and improvement of the people's livelihood, develop the videophone opportunity in large scale, self own goes through arrival. Besides, the videophone can be low-priced convention TV terminal. This is resolved face to face at present, convention is many , big problem of expense has very much helping. Since needing, push , videophone and convention TV job have got development of fleetness. This is main since international communication alliance ITU has united the various standard, communication and control protocol compressing the standard and the network including multi-media, will do, every is able to unite intercommunication mutually between firm's equipment , has paved the way for development of this industry.The videophone system that I design is network owing to campus , comes to realize communicating by phone between two people by seeking in the local area network some platform machine IP address. The Voice over IP (VoIP) technology is one kind of new technique developing over the past few years. Transmission carrying out the real time pronunciation since it is to make use of IP network, have required bandwidth is small , resource utilization ratio is high , cost is cheap wait for a lot of merit , get broad application , application and dissemination being unable to get range big in our country therefore in the whole world. Be a technology's turn to be able to apply to the wide area network not only , also can make use of the videophone that it does realize PC to PC as for campus net inner consumer,this will fully utilize now having resource , will reach the purpose economizing on the use of funds.Development of IP telephone brief history , IP phone technology principle the main body of a book has been introduced first; Be face to face at present most popular owing to H. The technology has carried out 323 agreements VoIP studying; Be based on the systematic IP telephone function and realize process, analysis real time pronunciation mainly compressing the code technology and transferring technology principle; the programming making use of the now available laboratory experiment environment , making use of Visual C + + has designed and accomplished basically one kind of network campus PC to PC videophone system-based programming; and have carried out analysis on problem come across by process middle programming and have solved.By the fact that testing , confirming the function making use of the now available local area network to realize IP telephone is completely feasible,can save bandwidth and telephone price, may excavate the latent energy now having resource sufficiently together. Besides, to a few, tone video frequency IP telephone emergencies after solve problem in the nowadays such as synchro , improving IP telephone real time pronunciation mass has carried out investigation and discussion such as.