METHODS FOR SPEECH ANALYSIS AND SYNTHESIS
    11.
    发明公开
    METHODS FOR SPEECH ANALYSIS AND SYNTHESIS 失效
    法语音分析和综合。

    公开(公告)号:EP0549699A1

    公开(公告)日:1993-07-07

    申请号:EP91917420.0

    申请日:1991-09-20

    IPC分类号: G10L11 G10L19

    摘要: On procède à l'estimation de valeurs de hauteur de résolution à sous-nombre entier lors de l'estimation initiale de la hauteur, les valeurs de hauteur à sous-nombre entier étant de préférence estimées par interpolation de variables intermédiaires entre des valeurs de nombre entier. On utilise des régions de hauteur afin de réduire la quantité de calculs nécessaires à l'estimation initiale de la hauteur. On utilise une résolution dépendante de la hauteur lors de l'estimation initiale de ladite hauteur, une résolution supérieure étant utilisée pour des valeurs plus petites de hauteur.

    LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN
    14.
    发明授权
    LOW-FREQUENCY EMPHASIS FOR LPC-BASED CODING IN FREQUENCY DOMAIN 有权
    爱德华兹·贝松

    公开(公告)号:EP2951814B1

    公开(公告)日:2017-05-10

    申请号:EP14701984.8

    申请日:2014-01-28

    IPC分类号: G10L19/02 G10L19/26 G10L19/08

    摘要: The invention provides an audio encoder including a combination of a linear predictive coding filter having a plurality of linear predictive coding coefficients and a time-frequency converter, wherein the combination is configured to filter and to convert a frame of the audio signal into a frequency domain in order to output a spectrum based on the frame and on the linear predictive coding coefficients; a low frequency emphasizer configured to calculate a processed spectrum based on the spectrum, wherein spectral lines of the processed spectrum representing a lower frequency than a reference spectral line are emphasized; and a control device configured to control the calculation of the processed spectrum by the low frequency emphasizer depending on the linear predictive coding coefficients of the linear predictive coding filter.

    摘要翻译: 本发明提供一种音频编码器,其包括具有多个线性预测编码系数的线性预测编码滤波器和时间 - 频率转换器的组合,其中该组合被配置为滤波并将该音频信号的帧转换为频域 以便基于帧和线性预测编码系数输出频谱; 配置为基于频谱计算处理频谱的低频增强器,其中强调表示比参考频谱线更低频率的处理频谱的频谱线; 以及控制装置,被配置为根据线性预测编码滤波器的线性预测编码系数来控制低频增强器对经处理频谱的计算。

    NOISE FILLING WITHOUT SIDE INFORMATION FOR CELP-LIKE CODERS
    16.
    发明公开
    NOISE FILLING WITHOUT SIDE INFORMATION FOR CELP-LIKE CODERS 审中-公开
    降噪AT FOR CELP编码器没有额外的信息

    公开(公告)号:EP2951816A2

    公开(公告)日:2015-12-09

    申请号:EP14701567.1

    申请日:2014-01-28

    IPC分类号: G10L19/028

    摘要: This invention relates to an audio decoder for providing a decoded audio information on the basis of an encoded audio information comprising linear prediction coefficients (LPC), a respective method, a respective computer program for performing such a method and an audio signal for a storage medium having stored such an audio signal, the audio signal having been treated with such a method. The audio decoder comprises a tilt adjuster configured to adjust a tilt of a noise using linear prediction coefficients of a current frame to obtain a tilt information and a noise inserter configured to add the noise to the current frame in dependence on the tilt information obtained by the tilt calculator. Another audio decoder according to the invention comprises a noise level estimator configured to estimate a noise level for a current frame using a linear prediction coefficient of at least one previous frame to obtain a noise level information; and a noise inserter configured to add a noise to the current frame in dependence on the noise level information provided by the noise level estimator. Thus, side information about a background noise in the bitstream may be omitted.

    Speech coding apparatus, speech decoding apparatus, speech coding method, speech decoding method, and computer readable recording medium
    19.
    发明公开
    Speech coding apparatus, speech decoding apparatus, speech coding method, speech decoding method, and computer readable recording medium 审中-公开
    一种语音编码装置,语音解码装置,声音编码方法,声音译码方法,和计算机可读记录介质

    公开(公告)号:EP1887566A1

    公开(公告)日:2008-02-13

    申请号:EP07015521.3

    申请日:2007-08-07

    发明人: Ide, Hiroyasu

    IPC分类号: G10L19/08

    CPC分类号: G10L19/087

    摘要: In a speech coding apparatus (111), a band-pass filter unit (133) separates a residual signal generated by a predictive analyzer (131) into band by band components. Then, a gain calculation unit (135) and a voiced/unvoiced discrimination and pitch extraction unit (137) acquire information on an intensity characterizing each band, information on a result of discrimination as to whether each band-by-band component is a voiced sound or unvoiced sound, and information on a pitch frequency when it is a voiced sound. The acquired information is coded together with a predictive coefficient and is transmitted to a speech decoding apparatus (211). The speech decoding apparatus (211) generates an excitation signal while reflecting the feature of each band of the original residual signal. This makes the excitation signal an efficient replica of the original residual signal.

    摘要翻译: 在语音编码装置(111),带通滤波器单元(133)分离由一个预测分析器(131)转换成带由带分量产生的残留信号。 然后,增益计算单元(135)和有声/无声判别以及音调提取部(137)获取到的强度的每个频带的信息,关于判别结果表征关于是否每个频带通过频带分量是浊音信息 声音或无声音,并在一个音调频率信息。当它是一个浊音。 所获取的信息与预测系数一起编码,并且为反式mitted到的语音解码装置(211)。 的语音解码装置(211)生成激励信号的速率,同时反映了原始残余信号的每个频带的特征。 这使得激励信号到原始残余信号的有效副本。

    600 BPS MIXED EXCITATION LINEAR PREDICTION TRANSCODING
    20.
    发明公开
    600 BPS MIXED EXCITATION LINEAR PREDICTION TRANSCODING 有权
    MELP(混合激发线性预测)-TRANSKODIERUNG MIT 600 BPS

    公开(公告)号:EP1597721A4

    公开(公告)日:2007-03-07

    申请号:EP04706439

    申请日:2004-01-29

    申请人: HARRIS CORP

    IPC分类号: G10L19/08 G10L19/14 G10L19/00

    CPC分类号: G10L19/087 G10L19/173

    摘要: Vector quantization techniques reduce the effective bit rate to 600 bps while maintaining intelligible speech. Four frames of speech are combined into one frame. The system uses mixed excitation linear prediction speech model parameters to quantized the frame and achieve a fixed rate of 600 bps. The system allows voice communication over bandwidth constrained channels.