| 一种基于SBC技术的16kbit/s高效语音编译码器 |
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| 引用本文： | 杨震,唐素兰,林建中,郑宝玉.一种基于SBC技术的16kbit/s高效语音编译码器[J].信号处理,1996(1). |
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| 作者姓名： | 杨震 唐素兰 林建中 郑宝玉 |
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| 作者单位： | 南京邮电学院电信工程系 |
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| 摘 要： | 本文介绍一种基于SBC技术的16kbit／s高效语音编译码器．在该编码方案中，IIR型正义镜象滤波器（QMF）用于实现语音分带，而基于快速搜索技术的矢量量化（FVQA）用于对除基带（采用ADPCM技术）外的其余高频带语音编码。一片TMS320C25芯片实现了两路16kbit／s语音编译码器，并借此实现了两人双向实时通信。得到良好的语音可懂度、自然度及客观评测结果。
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| 关 键 词： | 语音处理 子带编码 矢量量化 |
A SBC-Based 16 kbit/s Highly Efficient Speech Codec |
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| Yang Zhen , Tang Sulan Lin, Jianzhong ,Zheng Baoyu.A SBC-Based 16 kbit/s Highly Efficient Speech Codec[J].Signal Processing,1996(1). |
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| Authors: | Yang Zhen Tang Sulan Lin Jianzhong Zheng Baoyu |
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| Affiliation: | Yang Zhen ; Tang Sulan Lin; Jianzhong ;Zheng Baoyu |
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| Abstract: | A SBC-based speech codec system is presented and its implementation is disccussed. The IIR wersion of QMF is applied to divide the input speech into four subband signals. A modified ADPCM is used for coding the baseband speech and a novel VQ procedure is designed for coding othere to compress bit rate and reduce computations . Due to these improvements, such two codecs can be implemented by using only one TMS320C25 processor. Experimental results show its good objective and subiecitve speech quality. |
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| Keywords: | Speech processing Subband coding Vector quantization |
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