The Design of Interactive Multi-media System for Wireless Environment

Abstract

The study on the design of interactive multimedia system is a requirement of the development of information technology and satellite communications. In this paper, the author tries to explore the design of system for wireless environment with RTP agreement for the sake of solving the problems wired network has caused. Background The widespread application of computer network, satellite communications increases the humans' reliances on information technology. Moreover, people are more dependent on space information, especially in the outdoor or mobile events. So it is acknowledged that the requirement for the new approaches to get information is urgent. It is apparent that traditional wired networks fail to meet this requirement and then wireless network came into being. Wireless mobile facilities such as PDA, Laptop and wireless network technology such as Bluetooth, wifi, TD-SCHMA offers a mobile access to interactive multi-media function. The multi-media data transmission based on wireless network can be available for the mobile terminal users. Therefore, one good project for the solution to mobile multi-media problems can satisfy the increasing number of demands for the mobile service and enables them to enjoy the shared information without the restriction of time and space. According to this, the design and research on multi-media system for wireless environment has enormous research value and widespread market prospect. The comparison of several kinds of wireless communication mode As the table shows, Wifi adopts DSSS, Direct Sequence Spread Spectrum and CCK technology with the rate up to 53 Mbps and makes internet work flexibly and Independency as the supplementary of wired network. It can be classified into two modes: dot-to-dot mode and fundamental mode. The system in this article selects WIFI wireless communication for two reasons: one is limited experimental circumstances insufficient for the wireless transmission platform; On the other side, 802.11b can transmit more quickly with the speed of 11 Mbps sufficient for the load of huge data transmission Although the above mentioned wireless communication modes have transfer rates ranging from 1 Mbps to 70Mbps , multimedia audio and video data contains a large amount of information in the process of multimedia network communication and can incorporate tens or hundreds of megabytes of data information without compression. Thus, there is a necessity for compression process in the wireless multi-media network communication aimed at the drawbacks of wireless transmission such as the instability and high error rate. RTP agreement Compared with fixed network, wireless network has the characteristics including instability and high error rate, so RTP agreement can be employed to solve problems such as delay,disorder and incoherent of audio and radio. Besides, it has many schemes, split connection scheme and end-to-end will be introduced as follows. Split connection scheme divides the source end and CP connection into two segments with fixed CFH as the source end and MH as the terminal end with the BS as the connection. One end