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    Variable bit rate LPC filter quantizing and inverse quantizing device and method
    3.
    再颁专利
    Variable bit rate LPC filter quantizing and inverse quantizing device and method 有权

    公开(公告)号：USRE49363E1

    公开(公告)日：2023-01-10

    申请号：US15877829

    申请日：2018-01-23

    申请人： VoiceAge Corporation

    发明人： Philippe Gournay ,  Bruno Bessette ,  Redwan Salami

    IPC分类号： G10L19/06 ,  H03M7/30 ,  G10L19/18

    摘要： A device and a method for quantizing a LPC filter in the form of an input vector in a quantization domain, comprises a calculator of a first-stage approximation of the input vector, a subtractor of the first-stage approximation from the input vector to produce a residual vector, a calculator of a weighting function from the first-stage approximation, a warper of the residual vector with the weighting function, and a quantizer of the weighted residual vector to supply a quantized weighted residual vector. A device and a method for inverse quantizing of a LPC filter, comprises means for receiving coded indices representative of a first-stage approximation of a vector representative of the LPC filter in a quantization domain and of a quantized weighted residual version of the vector, a calculator of an inverse weighting function from the first-stage approximation, an inverse quantizer of the quantized weighted residual version of the vector to produce a weighted residual vector, a multiplier of the weighted residual vector by the inverse weighting function to produce a residual vector, and an adder of the first-stage approximation with the residual vector to produce the vector representative of the LPC filter in the quantization domain.

    Method and device for efficiently distributing a bit-budget in a CELP codec
    4.
    发明授权
    Method and device for efficiently distributing a bit-budget in a CELP codec 有权

    公开(公告)号：US11276412B2

    公开(公告)日：2022-03-15

    申请号：US16648623

    申请日：2018-09-20

    申请人： VOICEAGE CORPORATION

    发明人： Vaclav Eksler

    IPC分类号： G10L19/002 ,  G10L19/038 ,  G10L19/12 ,  G10L19/24

    摘要： A method and device allocates a bit-budget to a plurality of first parts of a CELP core module of (a) an encoder for encoding a sound signal or (b) a decoder for decoding the sound signal. In the method and device, bit-budget allocation tables assign, for each of a plurality of intermediate bit rates, respective bit-budgets to the first CELP core module parts. A CELP core module bit rate is determined and one of the intermediate bit rates is selected based on the determined CELP core module bit rate. The respective bit-budgets assigned by the bit-budget allocation tables for the selected intermediate bit rate are allocated to the first CELP core module parts.

    METHOD AND SYSTEM FOR DECODING LEFT AND RIGHT CHANNELS OF A STEREO SOUND SIGNAL
    5.
    发明申请
    METHOD AND SYSTEM FOR DECODING LEFT AND RIGHT CHANNELS OF A STEREO SOUND SIGNAL 有权

    公开(公告)号：US20210027794A1

    公开(公告)日：2021-01-28

    申请号：US17071299

    申请日：2020-10-15

    申请人： VOICEAGE CORPORATION

    发明人： Tommy Vaillancourt ,  Milan Jelinek

    IPC分类号： G10L19/008

    摘要： A stereo sound decoding method and system decode left and right channels of a stereo sound signal, using received encoding parameters comprising encoding parameters of a primary channel, encoding parameters of a secondary channel, and a factor β. The primary channel encoding parameters comprise LP filter coefficients of the primary channel. The primary channel is decoded in response to the primary channel encoding parameters. The secondary channel is decoded using one of a plurality of coding models, wherein at least one of the coding models uses the primary channel LP filter coefficients to decode the secondary channel. The decoded primary and secondary channels are time domain up-mixed using the factor β to produce the decoded left and right channels of the stereo sound signal, wherein the factor β determines respective contributions of the primary and secondary channels upon production of the left and right channels.

    Non-Speech Content for Low Rate CELP Decoder
    10.
    发明申请
    Non-Speech Content for Low Rate CELP Decoder 有权
    低价CELP解码器的非语音内容

    公开(公告)号：US20130121508A1

    公开(公告)日：2013-05-16

    申请号：US13667921

    申请日：2012-11-02

    申请人： Voiceage Corporation

    发明人： Tommy Vaillancourt ,  Milan Jelinek

    IPC分类号： H03G3/20

    CPC分类号： H03G3/20 ,  G10L19/08 ,  G10L19/20 ,  G10L19/22 ,  G10L19/26 ,  G10L25/78 ,  G10L25/81 ,  G10L25/93

    摘要： A method and device for modifying a synthesis of a time-domain excitation decoded by a time-domain decoder, wherein the synthesis of the decoded time-domain excitation is classified into one of a number of categories. The decoded time-domain excitation is converted into a frequency-domain excitation, and the frequency-domain excitation is modified as a function of the category in which the synthesis of the decoded time-domain excitation is classified. The modified frequency-domain excitation is converted into a modified time-domain excitation, and a synthesis filter is supplied with the modified time-domain excitation to produce a modified synthesis of the decoded time-domain excitation.

    摘要翻译： 一种用于修改由时域解码器解码的时域激励的合成的方法和装置，其中解码的时域激励的合成被分类为多个类别之一。 解码的时域激励被转换为频域激励，并且频域激励被修改为将解码的时域激励的合成分类的类别的函数。 将修正的频域激励转换为修正的时域激励，并对合成滤波器进行修改的时域激励，以产生经解码的时域激励的修正合成。