ABSTRACT
With today's era of the continuous development of information technology, computer technology has been the updating and development, along with the popularity of computer, information superhighway, the rise of multimedia technology has begun to enter millions of households. It makes boring computer screen into a colorful and audio-visual displays and Mao, has changed people's learning and working environment, for human civilization opened up a new era. Sound card technology to multimedia computer technology to one of the key technologies, the computer's sound card technology to express themselves more rich. Voice of the acquisition and broadcast networks for the transmission of sound development and progress of technology has made tremendous contributions.
With computers and digital network technology development, the traditional mode of communication has brought new challenges, is no longer before, face-to-face chat, but to communicate through the Internet. Through the study are familiar with Visual C++ application of the tools, knowledge and understanding of the basic principles of voice transmission. Voice over the course of study the basic process: collection, voice compression, transmission, decompression and playback, and so on. LAN transmission between voice and text, can broadcast that a user to many users simultaneously transfer voice and text. Can add, delete users, volume control, preservation and removal of records, but also its set of parameters.