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可变阶数语音编码模型的频域技术

A frequency domain technique of the variable-order speech coding
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摘要 为了进一步压缩比特率,在线性预测(LP)语音编码中使用了可变阶数方法。即根据当前语音帧的性质决定相应LP滤波器的阶数。但是,如果预测阶数太小,由于语音频谱的动态范围大,可能使LP分析不能够正确地匹配较高的共振峰。讨论了一个用于语音编码的频域技术,用以在浊音语音共振峰模型方面改善低阶数线性预测(LP)的性能。 For compressing bit rate, the variable - order filter method is used in linear prediction (LP) speech ceding. However, due to the large dynamic range of the speech spectrum it might happen that IP analysis is unable to match the higher forrnants properly if the prediction order is too small. A frequency domain technique is presented to be used in speech coding to improve the performance of low order linear prediction (IP) in modeling of formants of voiced speech.
出处 《信息技术》 2006年第1期18-20,共3页 Information Technology
基金 山东大学威海分校科研基金项目资助
关键词 可变阶数 语音编码 频域处理方法 variable- order speech coding frequency domain technique
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参考文献7

  • 1蒋保臣.可变阶数多脉冲激励线性预测语音编码方法[J].山东大学学报(工学版),2004,34(4):1-3. 被引量:2
  • 2Alku P,Varho S.A frequency domain method to improve modeling of formants in speech coding application of linear prediction[DB/OL] www.es.isy.liu.se/norsig2000/publ/page109id030.
  • 3Schroeder M R,Atal B S.Code-excited linear prediction (CELP):High-quality speech at very low bit rates,in Proc[J].IEEE Int.Conf.on Acoustics,Speech and Signal Proc.,Tampa,Florida,USA,1985(3):937-940.
  • 4Atal B S.High-quality speech at low bit rates:Multi-pulse and stochastically excited linear predictive coders,in Proc[J].IEEE Int.Conf.On Acoustics,Speech and Signal Proc.,Tokyo,Japan,1986(4):1681-1684.
  • 5Vary P,Hellwig K,Hofmann R,et al.Speech codec for the European mobile radio system,in Proc[J].IEEE Int.Conf.on Acoustics,Speech and Signal Proc.,New York,USA,1988(4):227-230.
  • 6Makhoul J.Linear prediction:A tutorial review,Proc[J].IEEE,1975,63(4):561-580.
  • 7Markel J D,Gray A H.Linear prediction of speech[R].New York:Springer,1976.

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