基于STM32的光话机ADPCM压缩编码算法与实现  

Optical Telephone ADPCM Compression Coding Algorithm and Implementation Based on STM32

作　　者：胡晓婷[1] 宋寿鹏[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《电子科技》2016年第11期16-18,21,共4页Electronic Science and Technology

摘　　要：针对部分光纤铺设及维护工作是在山区、森林等无线信号差的条件下进行的情况,文中为了解决此种环境下通话困难的问题,同时降低数码率,节省光纤带宽,采用了一种简化的语音压缩编码算法,并在基于STM32单片机的光话机中实现。该压缩编码算法采用自适应差分脉冲编码调制技术,具有较高的压缩比。仿真实验表明,在压缩比为4:1的条件下,可获得较低的数码率和较高的语音通话质量。Some optical fiber laying and maintenance are carried out in poor wireless environment, such as mountain areas and forests. In order to solve the problem of call difficulties in such environments, reduce digital rate and save fiber bandwidth, a simplified speech compression coding algorithm is adopted and phones based on the STM32 single chip microcomputer. The speech compression coding algori differential pulse code modulation technology, which has high compression ratio. Simulation achieve high-quality voice calls at a compression ratio of 4：1.

关 键 词：光话机 语音 压缩编码算法 自适应差分脉冲编码调制 STM32 

分 类 号：TN912[电子电信—通信与信息系统]