| 语音编码技术及其实验研究 |
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| 引用本文： | 刘云,沈连丰,朱惠芬. 语音编码技术及其实验研究[J]. 电气电子教学学报, 2004, 26(3): 11-16 |
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| 作者姓名： | 刘云 沈连丰 朱惠芬 |
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| 作者单位： | 东南大学,移动通信国家重点实验室,江苏,南京,210096;东南大学,移动通信国家重点实验室,江苏,南京,210096;东南大学,移动通信国家重点实验室,江苏,南京,210096 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目 (批准函 :教技发中心函 [2 0 0 3 ] 172号 )，江苏省基础研究项目 (编号 :BK2 0 0 3 0 5 5 ) |
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| 摘 要： | 主要讨论了三种语音编码方案，即线性脉冲编码调制(PCM，Pulse Code Modulation)、A律PCM和连续可变斜率增量调制(CVSD，Continuous Variable Slope Delta Modulation)。在此基础上设计了蓝牙语音编码实验，涵盖了脉冲编码调制的抽样、量化和编码整个过程。以突发错误对语音编码实验的影响为例，分析和比较了这三种语音编码方式所受到的影响。仿真结果表明CVSD的语音通信抗干扰能力较强，是目前语音编码当中最优的编码方案。所设计的实验内容有助于更好地理解和掌握语音编码技术。
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| 关 键 词： | 语音编码 线性PCM A律PCM CVSD |
| 文章编号： | 1008-0686(2004)03-0011-06 |
| 修稿时间： | 2004-03-29 |
Study of Speech Encoding Technology and its Experiment |
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| LIU Yun,SHEN Lian feng,ZHU Hui fen. Study of Speech Encoding Technology and its Experiment[J]. Journal of Electrical & Electronic Engineering Education, 2004, 26(3): 11-16 |
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| Authors: | LIU Yun SHEN Lian feng ZHU Hui fen |
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| Abstract: | Three kinds of speech encoding schemes, namely, Pulse Code Modulation, A law PCM and Continuous Variable Slope Delta Modulation, are discussed mainly. Based on them, a speech encoding experiment used by bluetooth is designed, and it covers the total process of PCM from sampling, quantization and encoding. As an example of burst errors which affect speech encoding experiment, effects on these three speech encoding methods are analyzed and compared. The simulation results indicate that CVSD has a stronger anti interference ability of speech communication, and it is an optimum scheme of speech encoding at present. The content of experiment designed helps students to understand and master the speech encoding technology better. |
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| Keywords: | speech encoding linear PCM A-law PCM CVSD |
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