Abstract:

To resolve the problem of processing Chinese language in embedded DSP（Digital Signal Processing） real\|time video communication system, the design and implementation methods of message (in Chinese language) exchanging function were proposed in embedded IP multimedia communications system. Hardware design and software solution are given. Software processing technologies are discussed in detail. The method of multi-thread synchronization on the embedded platform is proposed. A compact Chinese Library is implemented in the embedded multimedia communication terminal device. Keyboard input is read through the I2C(Inter-Integrated Circuit) bus and edited into Chinese words using T9 pinyin processing tool. While guaranteeing real\|time audio and video communications, it also provides bidirectional speedy message (in Chinese language) exchanging function.

Key words: TMS320DM642 chip, T9 input method, keyboard, I2C bus, ZLG7290 chip