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    LINEAR-PREDICTIVE ANALYSIS DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM
    4.
    发明公开
    LINEAR-PREDICTIVE ANALYSIS DEVICE, METHOD, PROGRAM, AND RECORDING MEDIUM 审中-公开
    线性分析分析师，VERFAHREN，程序在AUFZEICHNUNGSMEDIUM

    公开(公告)号：EP3098813A1

    公开(公告)日：2016-11-30

    申请号：EP15740985.5

    申请日：2015-01-20

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： KAMAMOTO, Yutaka ,  MORIYA, Takehiro ,  HARADA, Noboru

    IPC分类号： G10L25/12 ,  G10L25/06 ,  G10L25/27

    CPC分类号： G10L25/12 ,  G10L19/06 ,  G10L25/06 ,  G10L25/21 ,  G10L25/90

    摘要： An autocorrelation calculating part 21 calculates autocorrelation R o (i) from an input signal. A predictive coefficient calculating part 23 performs linear predictive analysis using modified autocorrelation R' o (i) obtained by multiplying the autocorrelation R o (i) by a coefficient w o (i). Here, it is assumed that a case where, for at least part of each order i, the coefficient w o (i) corresponding to each order i monotonically increases as a value having negative correlation with a fundamental frequency of an input signal in a current frame or a past frame increases and a case where the coefficient w o (i) monotonically decreases as a value having positive correlation with a pitch gain in a current frame or a past frame increases, are comprised.

    摘要翻译： 自相关计算部21根据输入信号计算自相关R o（i）。 预测系数计算部23使用通过将自相关R o（i）乘以系数w o（i）而获得的修正的自相关R'o（i）来执行线性预测分析。 这里，假设对于每个阶数i的至少一部分，对应于每个阶数i的系数wo（i）单调增加为与当前帧中的输入信号的基频具有负相关的值 或者过去帧增加，并且包括系数wo（i）随着与当前帧或过去帧中的音调增益具有正相关性的值而单调减小的情况。

    Voice-band extending apparatus and voice-band extending method
    6.
    发明公开
    Voice-band extending apparatus and voice-band extending method 审中-公开
    话音频带扩展装置和语音频带扩展方法

    公开(公告)号：EP2434486A3

    公开(公告)日：2013-12-11

    申请号：EP11171463.0

    申请日：2011-06-27

    申请人： FUJITSU LIMITED

    发明人： Togawa, Taro ,  Ito, Shusaku ,  Otani, Takeshi ,  Suzuki, Masanao ,  Ota, Yasuji

    IPC分类号： G10L21/038 ,  G10L25/27

    CPC分类号： G10L21/038 ,  G10L25/27

    摘要： A device includes a fast Fourier transform (FFT) unit (110), a signal noise ratio (SNR) calculation processing unit (120), a band selecting unit (130), an extension-signal creating unit (140), an addition unit (150), and an inverse fast Fourier transform (IFFT) unit (160). The FFT unit (110) performs the Fourier transform on an input signal that is input from the outside. The SNR calculation processing unit (120) calculates an SNR with respect to each of bands in the input signal. The band selecting unit (130) selects a band of which SNR exceeds a threshold and is the maximum SNR, based on respective SNRs of the bands. The extension-signal creating unit (140) creates an extension signal based on a signal acquired by the band selecting unit (130). The addition unit (150) adds the extension signal to the input signal, and creates a band-extended signal. The IFFT unit (160) performs the inverse fast Fourier transform on the band-extended signal, and creates an output signal.