| 一种采用定点DSP实现的1.8kbps MBE-LPC声码器 |
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| 引用本文： | 李永明,陈弘毅,朱益厅.一种采用定点DSP实现的1.8kbps MBE-LPC声码器[J].半导体学报,2000,21(8):803-809. |
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| 作者姓名： | 李永明 陈弘毅 朱益厅 |
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| 作者单位： | 清华大学微电子学研究所!北京100084 |
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| 基金项目： | 国家自然科学基金资助项目(69636030)[Project Supported by National Natural Science Foundation of China Under Grant No．69636030]. |
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| 摘 要： | 提出了一种结合 MBE(多带激励 )模型和 LPC(线性预测编码 )模型的 1 .8kbps声码器 .在这种声码器中 ,采用 LPC特征参数来代表语音帧的频谱 ,利用 LPC残差进行基音提取和多带清浊音判决 ,采用 MBE模型合成语音 ,并在高频浊音带的语音合成中混以清音 .在定点 Mo-torola DSP560 0 2 EVM上 ,可以在 1 .8kbps的码率下对语音进行实时的编解码处理 ,具有存储量和计算量较小的特点 .其合成语音质量超过了 LPC- 1 0 e.
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| 关 键 词： | MBE-LPC 语音分析 语音合成 DSP实现 |
| 文章编号： | 0253-4177(2000)08-0803-07 |
| 修稿时间： | 1999-06-16 |
1.8kbps MBE-LPC Vocoder Implemented by Fixed-Point DSP |
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| LI Yong\|ming,CHEN Hong\|yi and ZHU Yi\|ting.1.8kbps MBE-LPC Vocoder Implemented by Fixed-Point DSP[J].Chinese Journal of Semiconductors,2000,21(8):803-809. |
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| Authors: | LI Yong\|ming CHEN Hong\|yi and ZHU Yi\|ting |
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| Affiliation: | LI Yong-ming
,CHEN Hong-yi
,ZHU Yi-ting
(Institute of Microelectronics,Tsinghua University,Beijing 100084,China) |
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| Abstract: | A 1 8kbps MBE\|LPC vocoder is presented,which combines MBE model and LPC model.LPC characteristic parameters are used to represent the spectrum of speech frame;Pith\|abstraction and multiband U/V decision are carried out by analysing the LPC residue.With MBE model, the synthesised speech is obtained.And unvoice is mixed in the speech synthesis of high frequency voice band.At the bit rate of 1 8kbps it is implemented by the fixed\|point motorola's DSP560002 EVM board real\|timely.The vocoder is of smaller memory storage and simplify computation,with quality better than LPC\|10e. |
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| Keywords: | Multi\|Band Excitation\|Linear\|Prediction Coding speech analysis speech synthesis DSP implementation |
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