摘要
在多媒体处理芯片VFAST开发平台上,快速实现了G.729I语音解码器。首先,根据G.729I多码率编解码算法的要求,介绍了VFAST适合音视频开发的特点及其开发环境;然后,将解码算法移植到VFAST平台并进行大量的优化,给出针对不同模块的优化策略。由实验结果可知,使用论文给出的优化算法,可在VFAST上快速实时实现G.729I解码器,在单片VFAST上可以全双工实时处理13路语音信号,满足语音实时通信的要求。
A real-time G.729I speech decoder is proposed based on media processor VFAST.Firstly,according to the requirement of G.729I decoder algorithms,the properties of VFAST are introduced.Then,to replant and optimize program,the optimization methods for relevant modules are presented.Finally,the experimental results show that the real-time G.729I decoder can be realized on VFAST using proposed algorithms,and the number of channels provided by one chip of VFAST can reach as high as 13,and entirely fulfil the demand of real-time voice communications.
出处
《计算机工程与应用》
CSCD
北大核心
2005年第13期81-84,共4页
Computer Engineering and Applications
基金
国家自然科学基金(编号:60272097)
