摘要
在无线多通道语音通信中,距离长短使各接收机接收信号的时间不一,同步输出需要精确的延时。介绍一种新型的基于AMBE2000和AD73311的高质量语音同步通信系统的设计与实现。该系统能够在2.0～2.4kb/s的低比特速率产生高话音质量,实现最小步长为1us的输出延时,达到多路同步传输效果。因此,该系统可以广泛应用于软件无线电,多模式电台及多路广播等场合。
In the wireless multi-channel speech communications, the receivers could not receive signals at the same time because of the different distance from the transmitter. In order to achieve synchronous output signals, high-precision delay is necessary. In this paper, a novel high-quality synchronous voice communication system based on AMBE2000 and AD73311 is designed. In condition of low bitrate （2.0～2.4 kb/s）, the system still has a good voice quality, and could achieve the output time delay with the smallest step of 1 us. In a word, this system could be widely applied to software radio, multi-channel voice transmission, secure communications, and other voice processing fields.
出处
《通信技术》
2010年第2期57-59,共3页
Communications Technology
关键词
语音编码
模数转换
同步设计
现场可编程门阵列
speech coding
analog-to-digital conversion
synchronous design
field-programmable gate array
