| 一种高效的线谱对参数分段量化方案 |
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| 引用本文： | 张雄伟,闵刚,杨吉斌,闫佩君.一种高效的线谱对参数分段量化方案[J].解放军理工大学学报,2009,10(1):1-6. |
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| 作者姓名： | 张雄伟 闵刚 杨吉斌 闫佩君 |
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| 作者单位： | 张雄伟,杨吉斌,ZHANG Xiong-wei,YANG Ji-bin(解放军理工大学,通信工程学院,江苏,南京,210007);闵刚,MIN Gang(解放军理工大学,通信工程学院,江苏,南京,210007;西安通信学院,陕西,西安,710106);闫佩君,YAN Pei-jun(西安通信学院,陕西,西安,710106)
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| 摘 要： | 为了适应300 b/s以下超低速声码器的需要,提出了一种基于离散余弦变换DCT高效的线谱对参数分段量化方案--DCTSQ(discrete cosine transform segment quantization)方案.采用分段量化的思想,针对语音分段后提取出的线谱对参数矩阵维数不固定问题,对维数转换进行优化分析并利用DCT实现.在此基础上,推导出了DCTSQ方案的码本设计方法.仿真结果表明,相对于目前的分段量化方案和矩阵量化方案,DCTSQ方案可有效提高LSP参数量化效率.
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| 关 键 词： | 线谱对 离散余弦变换 分段量化 语音编码 |
Efficient segment quantization scheme for LSP parameters |
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| ZHANG Xiong-wei,MIN Gang,YANG Ji-bin and YAN Pei-jun.Efficient segment quantization scheme for LSP parameters[J].Journal of PLA University of Science and Technology(Natural Science Edition),2009,10(1):1-6. |
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| Authors: | ZHANG Xiong-wei MIN Gang YANG Ji-bin and YAN Pei-jun |
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| Institution: | ZHANG Xiong-wei1,MIN Gang1,2,YANG Ji-bin1,YAN Pei-jun2 |
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| Abstract: | In order to meet the need of very low bit rate vocoder below 300 b/ps,an efficient segment quantization scheme called DCT based segment quantization(DCTSQ) scheme for LSP parameters was proposed.The dimension of LSP matrix extracted from speech segment was unfixed,so the dimension conversion matrix was optimized and implemented by DCT.The codebook designing method for DCTSQ scheme was also deduced.Simulation results show that the DCTSQ scheme performs better than the segment quantization scheme and the matr... |
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| Keywords: | LSP( line spect rum pairs ) DCT ( discrete cosine t ra nsfo rm) SQ ( segment qua nti zatio n) speech coding |
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