A fixed-point DSP implementation for a low bit rate vocoder

被引：0

作者：

Yao, FY ^{[1
]}

Li, BZ ^{[1
]}

Zhang, M ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Met, Microelect Branch, Shanghai 200233, Peoples R China

来源：

1998 5TH INTERNATIONAL CONFERENCE ON SOLID-STATE AND INTEGRATED CIRCUIT TECHNOLOGY PROCEEDINGS | 1998年

关键词：

D O I：

10.1109/ICSICT.1998.785897

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Fixed-point DSP implementation of the decoder and the synthesizer of a real time vocoder with 1.4 kbps bit rate has been accomplished instead of the usual realization of low bit rate vocoder in floating paint DSP, Replacing floating point values with fixed-point ones and other approaches have been adopted to reach a real time solution, The implemented fixed-point decoder and synthesizer run at 11.3 MIPS on the average and occupy 1,246 words of program memory, 1,338 words of table ROM and 814 words of RAM in a 40 MHz TMS320C50 DSP chip. The results indicate the possibility to implement the whole vocoder with low cost fixed-point DSP.

引用

页码：365 / 368

页数：4

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