摘要
文章介绍了一种2/4线话音接口和回波抵消器的设计与实现方案,该方案实现了2/4线的话音接口,包括A/D、D/A变换,ADPCM编解码,自适应回波抵消等。其中,ADPCM编解码和回波抵消器是基于FPGA使用VHDL语言编写实现的。测试表明,该接口电路以较小的资源消耗,提供了优异的话音通信质量,在电力系统话音通信中具有重要的实用价值。
This paper introduces the design and implementation of 2/4 lines speech interface and echo canceller. This 2/4 lines speech interface includes A/D, D/A conversion, ADPCM coding and decoding, and adaptive echo canceller etc. The adaptive echo canceller is designed by using FPGA based on VHDL. The test has indicated that the project can provide excellent voice quality with less resource consumption. It is with great value for power telecommunication.
出处
《电力系统通信》
2007年第5期63-66,共4页
Telecommunications for Electric Power System
