利用离散余弦变换的语音信号压缩方案  

Speech signal compression schemes based on discrete cosine transform

作　　者：符晓娟[1] 杨万全[1] 

机构地区：[1]四川大学电子信息学院,成都610065

出　　处：《信息技术》2006年第11期74-76,共3页Information Technology

摘　　要：利用离散余弦变换后的语音信号能量主要集中在低频段的特点以及语音信号的短时平稳性,研究三种基于一维离散余弦变换的语音压缩方案。Matlab仿真结果表明三种方案的数据压缩率高,重建语音信号具有良好的清晰度和自然度。Making use of the features that the energy of speech signal is concentrated in low frequency after DCT and it has stability in short time, three speech compression schemes based on one - dimension DCT are researched. MATLAB simulative results indicate that their data compression ratio is high and the reconstructed speech signals have good quality.

关 键 词：离散余弦变换 语音信号 语音压缩 信噪比 

分 类 号：TN912.3[电子电信—通信与信息系统]