| 带有帧间级间预测的线谱频率参数多级矢量量化 |
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| 引用本文： | 李晔,彭坦,许明,计哲,崔慧娟,唐昆.带有帧间级间预测的线谱频率参数多级矢量量化[J].清华大学学报(自然科学版),2009(7). |
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| 作者姓名： | 李晔 彭坦 许明 计哲 崔慧娟 唐昆 |
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| 作者单位： | 清华大学电子工程系; |
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| 基金项目： | 国家自然科学基金资助项目(60572081) |
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| 摘 要： | 为在极低速率下实现高质量的语音编码,提出一种高效的带有帧间及级间预测的线谱频率参数多级码本矢量量化(IFP-MSVQ-ISP)算法。算法利用多级矢量量化中上一级码本的选定码矢对残差矢量进行预测,对去除预测分量的残差矢量再进行下一级矢量量化。测试结果表明,这种带有多级码本级间预测的算法与无级间预测的算法相比,能够有效降低线谱频率参数的量化误差,使谱失真降低0.1 dB以上,合成语音客观MOS提高0.02以上。该算法的实现对极低速率下语音压缩编码算法的研究具有重要的参考价值。
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| 关 键 词： | 语音编码 多级矢量量化 级间预测 |
High efficiency MSVQ for prediction linear spectrum frequency parameters with inter-frame and inter-stage prediction |
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| LI Ye,PENG Tan,XU Ming,JI Zhe,CUI Huijuan,TANG Kun.High efficiency MSVQ for prediction linear spectrum frequency parameters with inter-frame and inter-stage prediction[J].Journal of Tsinghua University(Science and Technology),2009(7). |
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| Authors: | LI Ye PENG Tan XU Ming JI Zhe CUI Huijuan TANG Kun |
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| Institution: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | A high efficiency multi stage vector quantization algorithm with inter-frame prediction and inter-stage prediction(IFP-MSVQ-ISP) was developed to predict the linear spectrum frequency(LSF) parameters.The residual vector of each quantization stage is first predicted by utilizing the selected vector from the pre-stage analysis to calculate the remaining vector.Simulations show that the algorithm greatly reduces speech spectral distortion by 0.1 dB while enhancing the mean opinion score of the reconstructed sp... |
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| Keywords: | speech coding multi stage vector quantization inter-stage prediction |
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