A Multimedia Multicast System Based On MPEG-4

With the rapid development of Computer and Networks, It is possible to transfer multimedia via Networks. The Transmissions play a significant role in our lives and works, and are widely used in the fields of Entertainment, Distance Learning,Remote Medical treatment and Remote Monitoring Control System. A Multimedia transmission System based on MP3, MPEG-4 and RTP is introduced in the article. The system comprises two sections: Send Section and Receive Section. In the Send Section ,Video stream is captured from USB webcam, processed by Video Title Overlay Filter, and sent to Video Compress Filter。Audio stream is captured from Audio Card, and sent to Audio Compress Filter。The Compressed Streams are sent to Networks by Multicast. In the Receive Section,Streams are received by Multicast Receiver, and parsed into Audio Stream and Video Stream. Then the streams are decompressed and Rendered to our screens and speakers. The article discusses in detail the design and realization of the multimedia transmission system. Audio compress algorithms, video compress algorithms and RTP (Real-time Transport Protocol) are also described in detail, which are crucial in the transmission system. It also provides the design of Title Filter, Sender Filter and Receiver Filter, and a solution of transmission system with Capture Filters, Compress Filters, Decompress Filters and Render Filters.