摘要
实验实现了数字可视对讲系统的音频设计。采用美国模拟器件公司(ADI)Blackfin系列处理器BF533平台,给出了G.723.1语音编解码器的系统设计方案及移植关键技术。不但对C语言程序算法上进行了优化,还针对BF533硬件特性提出并实现了更有效的优化策略,如寄存器代替局部变量,使用硬件循环代替软件循环等,实时实现了ITU-T的G.723.1双码率编解码器算法。实验结果表明,G.723.1语音编解码器能够完全在BF533开发板上实时实现。
The audio coding and decoding of visible dialogue system are realized by experiment. The system design scheme of G. 723.1 algorithm based on BF533 platform and the key transplantation technologies are presented. Not only the C level optimization is implemented, and according to the hardware characteristics of BF533, the effective optimization strategies are al- so carried out. For example, registers instead of variables, hardware instead of software and so on. The experiments show that G. 723.1 coding and decoding are implemented in real - time on BF533 platform.
出处
《现代电子技术》
2009年第13期76-78,共3页
Modern Electronics Technique
