| 语音信号DPCM压缩编码方法的研究 |
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| 引用本文： | 王磊,刘维献,姜威.语音信号DPCM压缩编码方法的研究[J].信息技术与信息化,1996(4). |
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| 作者姓名： | 王磊 刘维献 姜威 |
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| 作者单位： | 山东大学电子工程系 |
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| 摘 要： | 本文基于语音信号的特性分析，给出了差值脉冲编码（ＤＰＣＭ）的基本原理，并针对ＤＰＣＭ方法压缩比较低的缺陷，提出了根据语音信源概率分布提高压缩度的方法，对ＤＰＣＭ的编码质量也进行了改进。最后，给出了这种压缩方法的客观及主观的质量评价。
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| 关 键 词： | 概率密度，相关性，量化误差，信噪比 |
Research of DPCM about Speech Signal Compression |
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| Wang Lei,Liu Weixian,Jiang Wei.Research of DPCM about Speech Signal Compression[J].Information Technology & Informatization,1996(4). |
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| Authors: | Wang Lei Liu Weixian Jiang Wei |
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| Affiliation: | Wang Lei;Liu Weixian;Jiang Wei |
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| Abstract: | ased on the character analysis of speech signal, this paper gives the basic principle of Different Pulse Code Modulation. The way of raising the compression degree according to the speech probability distribution is found to overcome the defect of DPCM whose compression ratio is too low. The coding quality of DPCM is also improved. At the end, the objective and subjective evaluation is given about this compression project. |
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| Keywords: | Probability density Correlative Quantization errors Signal-noise ratio |
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