800/920/1200bps改进型多带激励语音编码器的DSP实现  

Implementation of the 800/920/1200bps Modified Multi-band Excitation Speech Coder Based on DSP Processor

作　　者：王都生[1] 

机构地区：[1]大连民族学院机电与控制工程研究所,大连116600

出　　处：《电子与信息学报》2007年第5期1106-1109,共4页Journal of Electronics & Information Technology

基　　金：国家民委科研项目"低速率语音编码器的DSP设计与实现"资助课题

摘　　要：该文介绍了基于多带激励（MBE）语音模型的改进型800／920／1200bps语音编码器。该编码器采用二级离散余弦变换编码方案对逐帧变化的谱幅度参数进行自适应动态量化编码，大大减小了编码比特率，使得800～1200bps速率的MBE语音编码器的实现成为可能。该文重点介绍二级离散余弦变换编码方案及DSP硬件实现。An 800/920/1200bps modified speech coder based on the Multi-Band Excitation （MBE） speech model is presented. The two stage discrete cosine transformation coding scheme has been used to quantize the spectral magnitude parameters changing frame-by-frame adaptively in the speech coder. The coded bit rate of speech is largely reduced and that make it possible the implementation of 800-1200bps MBE speech coder. This paper focuses on the design of two stage discrete cosine transformation coding scheme and hardware implementation based on DSP processor.

关 键 词：语音编码 多带激励 离散余弦变换 

分 类 号：TN912.32[电子电信—通信与信息系统]