利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.022 秒)

    Speech coding apparatus and speech decoding apparatus
    2.
    再颁专利
    Speech coding apparatus and speech decoding apparatus 失效

    公开(公告)号：USRE43190E1

    公开(公告)日：2012-02-14

    申请号：US12695942

    申请日：2010-01-28

    申请人： Hirohisa Tasaki ,  Tadashi Yamaura

    发明人： Hirohisa Tasaki ,  Tadashi Yamaura

    IPC分类号： G10L19/00

    摘要： A speech coding apparatus comprises a repetition period pre-selecting unit for generating a plurality of candidates for the repetition period of a driving excitation source by multiplying the repetition period of an adaptive excitation source by a plurality of constant numbers, respectively, and for pre-selecting a predetermined number of candidates from all the candidates generated. A driving excitation source coding unit provides both excitation source location information and excitation source polarity information that minimize a coding distortion, for each of the predetermined number of candidates, and provides an evaluation value associated with the minimum coding distortion for each of the predetermined number of candidates. A repetition period coding unit compares the evaluation values provided for the predetermined number of candidates with one another, selects one candidate from the predetermined number of candidates according to the comparison result, and furnishes selection information indicating the selection result, excitation source location code, and polarity code.

    Speech encoding apparatus and speech encoding and decoding apparatus
    6.
    发明授权
    Speech encoding apparatus and speech encoding and decoding apparatus 失效
    语音编码装置和语音编码解码装置

    公开(公告)号：US6052661A

    公开(公告)日：2000-04-18

    申请号：US777874

    申请日：1996-12-31

    申请人： Tadashi Yamaura ,  Hirohisa Tasaki ,  Shinya Takahashi

    发明人： Tadashi Yamaura ,  Hirohisa Tasaki ,  Shinya Takahashi

    IPC分类号： G10L19/00 ,  G10L19/04 ,  G10L19/12 ,  H03M7/30

    CPC分类号： G10L19/08

    摘要： A speech encoding apparatus capable of averting the deterioration of synthesis speech quality in encoding the input speech and of generating a high-quality synthesis output speech through small quantities of computation. The apparatus includes a target speech generation part for generating from the input speech a target speech vector of a vector length corresponding to a delay parameter; an adaptive codebook for generating from previously generated excitation signals an adaptive vector of the vector length corresponding to the delay parameter; an adaptive code search part for evaluating the distortion of a synthesis vector obtained from the adaptive vector with respect to the target speech vector so as to search for the adaptive vector conducive to the least distortion; and a frame code generation part for generating an excitation signal of a frame length from the adaptive vector conducive to the least distortion.

    摘要翻译： 一种语音编码装置，其能够避免编码输入语音中的合成语音质量的劣化，并且通过少量的计算产生高质量的合成输出语音。 该装置包括：目标语音产生部分，用于从输入语音产生与延迟参数对应的矢量长度的目标语音矢量; 自适应码本，用于从先前产生的激励信号生成与延迟参数对应的向量长度的自适应矢量; 自适应码搜索部分，用于评估从所述自适应矢量相对于所述目标语音矢量获得的合成矢量的失真，以便搜索有助于所述最小失真的自适应矢量; 以及帧码生成部，用于从有助于最小失真的自适应矢量生成帧长度的激励信号。

    AUDIO SIGNAL RESTORATION DEVICE AND AUDIO SIGNAL RESTORATION METHOD
    8.
    发明申请
    AUDIO SIGNAL RESTORATION DEVICE AND AUDIO SIGNAL RESTORATION METHOD 有权
    音频信号恢复装置和音频信号恢复方法

    公开(公告)号：US20140207443A1

    公开(公告)日：2014-07-24

    申请号：US14237623

    申请日：2011-12-27

    申请人： Kosuke Hosoya ,  Satoru Furuta ,  Tadashi Yamaura

    发明人： Kosuke Hosoya ,  Satoru Furuta ,  Tadashi Yamaura

    IPC分类号： G10L19/012

    CPC分类号： G10L19/012 ,  G10L21/0208 ,  G10L21/0388

    摘要： A sound source generating unit 101 generates from a narrowband audio signal not passing through noise suppression a sound source signal including a fine structure of a band to be restored. On the other hand, a noise suppressing unit 102 performs noise suppression of the narrowband audio signal and a spectral envelope estimating unit 103 estimates an spectral envelope of the band to be restored. A signal synthesizing unit 104 generates a pseudo-audio signal by combining the sound source signal and the spectral envelope, and the band-pass filter unit 105 passes the pseudo-audio signal of the band to be restored, and the signal addition unit 106 generates a broadband audio restoration signal by adding the pseudo-audio signal of the band to be restored to the narrowband audio signal.

    摘要翻译： 声源生成单元101从不通过噪声抑制的窄带音频信号生成包括要恢复的频带的精细结构的声源信号。 另一方面，噪声抑制单元102对窄带音频信号进行噪声抑制，并且频谱包络估计单元103估计要恢复的频带的频谱包络。 信号合成单元104通过组​​合声源信号和频谱包络来产生伪音频信号，并且带通滤波器单元105通过要恢复的频带的伪音频信号，并且信号相加单元106产生 宽带音频恢复信号，通过将要恢复的频带的伪音频信号相加到窄带音频信号。

    Speech encoding system, and speech encoding method
    9.
    发明授权
    Speech encoding system, and speech encoding method 失效
    语音编码系统和语音编码方法

    公开(公告)号：US07454328B2

    公开(公告)日：2008-11-18

    申请号：US10433354

    申请日：2001-04-26

    申请人： Tadashi Yamaura ,  Hirohisa Tasaki

    发明人： Tadashi Yamaura ,  Hirohisa Tasaki

    IPC分类号： G10L19/00 ,  G10L19/04 ,  G10L19/12 ,  G10L21/02

    CPC分类号： G10L19/12 ,  G10L2019/0005

    摘要： A speech encoding apparatus calculates encoding distortion of a noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the noise-like degree of the noise-like fixed code vector, calculates encoding distortion of a non-noise-like fixed code vector and multiplies the encoding distortion by a fixed weight corresponding to the non-noise-like fixed code vector, and selects the fixed excitation code associated with multiplication result with a smaller value.

    摘要翻译： 语音编码装置计算噪声状固定码矢量的编码失真，并将编码失真乘以与类噪声固定码矢量的噪声等级对应的固定权重，计算非噪声固定码矢量的编码失真 固定码矢量，将编码失真乘以与非噪声固定码矢量对应的固定权重，并选择与乘法结果相关联的固定激励码较小的值。