摘要
文章简单介绍了PNX1500 DSP[1]的体系架构,阐述了基于此架构的语音压缩算法G.729[2]的优化方法。在分析了影响G.729音频编码效率的关键因素基础上,选择了有针对性的优化策略对G.729音频编解码器的Cache部分进行指令优化和算法优化,有效地克服了影响编码速度的瓶颈,改善了编码器效率。
Aiming at the character of the multimedia processing chip called PNX 1500, this paper describes the replantation of the G.729TM algorithm into it, including its optimization, The result indicates that this arithmetic presented in the paper could implement the fast G.729 codec, and satisfies the requirements of audio realtime codec.
出处
《信息安全与通信保密》
2007年第6期56-57,共2页
Information Security and Communications Privacy
