Research And Implementation Of Multimedia Message Service Based On 3G Terminal

It is the aim of this dissertation to realize a Real-time MPEG-4 CODEC based on 3G terminal and control the CODEC to play and make MMS. It can not be up to par to run CODEC on ARM7 because of the ARM7' process ability. So the traditional architecture based on the wireless terminal is modified: a DSP coprocessor is added. The main application runs in ARM7 and the CODEC runs in DSP. It achieves the Real-time need of audio and visual process owing to the cooperate work between the double Processor. The system frame based on 3GPP is investigated thoroughly. The system model based on 3G terminal is brought forward. It is implemented and run very well. It is reliable, steady and Real-time. In this dissertation , the HOST-SLAVE mechanism is adopted and the communication mode of interrupt is abandoned.the MPEG-4's open source code is improved on so that it can run well and satisfy the requirement of Real-time communication of multimedia on the mobile telephone.It is of great theoretic and practical importance to the develop of multimedia communication of 3G mobile telephone.