| 小波包变换在水声信号压缩编码中的应用 |
| |
| 引用本文： | 赵亚丽,王鉴. 小波包变换在水声信号压缩编码中的应用[J]. 电声技术, 2009, 33(11): 48-50 |
| |
| 作者姓名： | 赵亚丽 王鉴 |
| |
| 作者单位： | 中北大学信息探测与处理技术研究所,山西太原030051 |
| |
| 摘 要： | 应用小波包变换及Huffman编码技术相结合的方法对水声信号进行了压缩编码。先对水声信号进行小波包分解；然后对分解系数进行阈值处理，最后对阈值后的系数进行Huffman编码。使用了两种阈值方案，通过仿真比较．其中不同频段不同阈值方案的零率比全局阈值的零率高。尽管全局阈值的零率稍低一些，但其Huffman编码效率较高且硬件实现较为简单，因此最后选取全局阈值进行闽值量化。仿真结果表明，本算法对水声信号压缩编码效果理想。
|
| 关 键 词： | 小波包 数据压缩 编码 |
Compression and Coding of Underwater Acoustic Signal Based on Wavelet Packet Transform |
| |
| ZHAO Ya-li,WANG Jian. Compression and Coding of Underwater Acoustic Signal Based on Wavelet Packet Transform[J]. Audio Engineering, 2009, 33(11): 48-50 |
| |
| Authors: | ZHAO Ya-li WANG Jian |
| |
| Affiliation: | ZHAO Ya-li,WANG Jian (Institute of Information Detecting and Processing Technology,North University of China,Taiyuan 030051,China) |
| |
| Abstract: | Wavelet packet transform and Huffman coding are applied to underwater acoustic signal compression and coding.Firstly,underwater acoustic signals are decomposed using wavelet packet transform.Secondly,wavelet packet coefficients are processed according to threshold.Comparison via simulation shows that the zero rate in the strategy of different thresholds is higher than that of the same threshold,whose efficiency of Huffman coding is higher and the realization easier. |
| |
| Keywords: | wavelet packet data compression coding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
