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语音信号MELP编码的研究与实现
语音信号MELP编码的研究与实现
【摘要】 对该编码技术进行了深入的研究,并在此基础上实现了2.4 kbps MELP声码器的计算机模拟,提出了对MELP多级矢量量化搜索方法的改进,以及用两片TMS320C31并行处理实现MELP算法的硬件电路设计。
【Abstract】 In this paper it is firstly analyzed what the MELP synthesis model modifies as composed to LPC. Secondly a 2.4 kbps vocoder based on MELP algorithm is simulated in PC platform. Eventually according to analysis of results an algrorithm method is introduced aimed at improving the coding performance of Multi stage vector quantization. Furthermore with a side by side operation mechanism of MELP vocoderusing two TMS320C31 DSP we desigin the hardware circuit to realize the MELP algorithm.
【关键词】 语音压缩编码;
基音估计;
多级矢量量化;
【Key words】 speech compression coding pitch estimate multi stage vector quantization;
【Key words】 speech compression coding pitch estimate multi stage vector quantization;
- 【文献出处】 电声技术 ,AUDIO ENGINEERING , 编辑部邮箱 ,2000年11期
- 【分类号】TN912
- 【被引频次】16
- 【下载频次】190