| TD-SCDMA中AMR语音编码器的实现 |
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| 引用本文： | 夏娟 申敏. TD-SCDMA中AMR语音编码器的实现[J]. 重庆邮电学院学报(自然科学版), 2004, 16(1): 51-53,56 |
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| 作者姓名： | 夏娟 申敏 |
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| 作者单位： | 重庆邮电学院，重庆邮电学院 重庆400065，重庆400065 |
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| 摘 要： | 语音编码方案的选取对移动通信系统的通话质量、信道容量等有重要影响。讨论了TD-SCDMA系统中AMR语音编码的自适应机制，分析了AMR中代数码本线性预测(ACELP)算法及实现过程。该方案可以在一块TMS320C5510上实现，通过在TD-SCDMA系统的硬件平台上自环测试，结果是理想的。
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| 关 键 词： | 语音编码 自适应编码 ACELP编码 |
TD-SCDMA based adaptive multi-rate codec |
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| XIA Juan,SHEN Min. TD-SCDMA based adaptive multi-rate codec[J]. Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition), 2004, 16(1): 51-53,56 |
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| Authors: | XIA Juan SHEN Min |
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| Abstract: | This paper describes an adaptive multi-rate codec for TD-SCDMA, and it also introduces how to realize the adaptation.As the coder consists of eight codecs, all use the same ACELP -method(Algebraic Code Excited Linear Predictive Coding) and modes that have different bit-rate partitionings, it can extend wireless quality to poor channel condition.All the codecs have been implemented with a single DSP chip(TMS320C5510) without degradation of the reconstructed speech,and the improvements have been obtained in a significant reduction in calculation complexity. |
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| Keywords: | adaptive multi-rate codec adaptive coding algebraic code excited linear predictive coding |
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