知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

88 条记录 (耗时 0.04 秒)

    Device and method for quantizing the gains of the adaptive and fixed contributions of the excitation in a CELP codec
    34.
    发明授权
    Device and method for quantizing the gains of the adaptive and fixed contributions of the excitation in a CELP codec 有权

    公开(公告)号：US09911425B2

    公开(公告)日：2018-03-06

    申请号：US15461945

    申请日：2017-03-17

    申请人： VOICEAGE CORPORATION

    发明人： Vladimir Malenovsky

    IPC分类号： G10L19/083 ,  G10L19/038 ,  G10L19/12 ,  G10L19/00

    CPC分类号： G10L19/083 ,  G10L19/038 ,  G10L19/12 ,  G10L2019/0003

    摘要： A device and method for quantizing a gain of a fixed contribution of an excitation in a frame, including sub-frames, of a coded sound signal, wherein the gain of the fixed excitation contribution is estimated in a sub-frame using a parameter representative of a classification of the frame. The gain of the fixed excitation contribution is then quantized in the sub-frame using the estimated gain. The device and method is used in jointly quantizing gains of adaptive and fixed contributions of an excitation in a frame of a coded sound signal. For retrieving a quantized gain of a fixed contribution of an excitation in a sub-frame of a frame, the gain of the fixed excitation contribution is estimated using a parameter representative of a classification of the frame, a gain codebook supplies a correction factor in response to a received, gain codebook index, and a multiplier multiplies the estimated gain by the correction factor to provide a quantized gain of the fixed excitation contribution.

    Audio coder/decoder with predictive coding of synthesis filter and critically-sampled time aliasing of prediction domain frames
    35.
    发明授权
    Audio coder/decoder with predictive coding of synthesis filter and critically-sampled time aliasing of prediction domain frames 有权
    具有合成滤波器的预测编码和预测域帧的临时采样时间混叠的音频编码器/解码器

    公开(公告)号：US08595019B2

    公开(公告)日：2013-11-26

    申请号：US13004475

    申请日：2011-01-11

    申请人： Ralf Geiger ,  Bernhard Grill ,  Bruno Bessette ,  Philippe Gournay ,  Guillaume Fuchs ,  Markus Multrus ,  Max Neuendorf ,  Gerald Schuller

    发明人： Ralf Geiger ,  Bernhard Grill ,  Bruno Bessette ,  Philippe Gournay ,  Guillaume Fuchs ,  Markus Multrus ,  Max Neuendorf ,  Gerald Schuller

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

    CPC分类号： G10L19/0212 ,  G10L19/04

    摘要： An audio encoder adapted for encoding frames of a sampled audio signal to obtain encoded frames, wherein a frame includes a number of time domain audio samples. The audio encoder includes a predictive coding analysis stage for determining information on coefficients of a synthesis filter and a prediction domain frame based on a frame of audio samples. The audio encoder further includes a time-aliasing introducing transformer for transforming overlapping prediction domain frames to the frequency domain to obtain prediction domain frame spectra, wherein the time-aliasing introducing transformer is adapted for transforming the overlapping prediction domain frames in a critically-sampled way. Moreover, the audio encoder includes a redundancy reducing encoder for encoding the prediction domain frame spectra to obtain the encoded frames based on the coefficients and the encoded prediction domain frame spectra.

    摘要翻译： 一种音频编码器，适于编码采样的音频信号的帧以获得编码的帧，其中帧包括多个时域音频采样。 音频编码器包括用于基于音频样本的帧来确定关于合成滤波器和预测域帧的系数的信息的预测编码分析阶段。 音频编码器还包括时间混叠引入变压器，用于将重叠的预测域帧转换到频域以获得预测域帧频谱，其中时间混叠引入变压器适于以重要取样的方式变换重叠的预测域帧 。 此外，音频编码器包括冗余减少编码器，用于根据系数和编码的预测域帧频谱对预测域帧频谱进行编码以获得编码的帧。

    System and Method for Enhancing a Decoded Tonal Sound Signal
    38.
    发明申请
    System and Method for Enhancing a Decoded Tonal Sound Signal 有权
    用于增强解码音调声音信号的系统和方法

    公开(公告)号：US20110046947A1

    公开(公告)日：2011-02-24

    申请号：US12918586

    申请日：2009-03-05

    申请人： Tommy Vaillancourt ,  Milan Jelinek ,  Vladimir Malenvosky ,  Redwan Salami

    发明人： Tommy Vaillancourt ,  Milan Jelinek ,  Vladimir Malenvosky ,  Redwan Salami

    IPC分类号： G10L21/02

    CPC分类号： G10L19/26 ,  G10L25/18

    摘要： A system and method for enhancing a tonal sound signal decoded by a decoder of a speech-specific codec in response to a received coded bit stream, in which a spectral analyser is responsive to the decoded tonal sound signal to produce spectral parameters representative of the decoded tonal sound signal. A quantization noise in low-energy spectral regions of the decoded tonal sound signal is reduced in response to the spectral parameters produced by the spectral analyser. The spectral analyser divides a spectrum resulting from spectral analysis into a set of critical frequency bands each comprising a number of frequency bins, and the reducer of quantization noise comprises a noise attenuator that scales the spectrum of the decoded tonal sound signal per critical frequency band, per frequency bin, or per both critical frequency band and frequency bin.

    摘要翻译： 一种用于响应于接收的编码比特流来增强由语音专用编解码器的解码器解码的音调声音信号的系统和方法，其中频谱分析仪响应于解码的音调声音信号以产生表示解码的频谱参数 音调声信号。 响应于由光谱分析仪产生的光谱参数，解码的音调声音信号的低能谱区域中的量化噪声被减小。 光谱分析仪将从光谱分析得到的光谱分成一组包括多个频率仓的临界频带，并且量化噪声的减法器包括噪声衰减器，其对每个关键频带的解码音调声音信号的频谱进行缩放， 每个频率仓，或每个临界频带和频率仓。

    Method and device for adaptive bandwidth pitch search in coding wideband signals
    39.
    发明授权
    Method and device for adaptive bandwidth pitch search in coding wideband signals 有权
    用于编码宽带信号中的自适应带宽音调搜索的方法和装置

    公开(公告)号：US07672837B2

    公开(公告)日：2010-03-02

    申请号：US11498771

    申请日：2006-08-04

    申请人： Bruno Bessette ,  Redwan Salami ,  Roch Lefebvre

    发明人： Bruno Bessette ,  Redwan Salami ,  Roch Lefebvre

    IPC分类号： G10L11/04 ,  G10L19/00

    CPC分类号： G10L19/26 ,  G10L2019/0011

    摘要： A pitch search method and device for digitally encoding a wideband signal, in particular but not exclusively a speech signal, in view of transmitting, or storing, and synthesizing this wideband sound signal. The new method and device which achieve efficient modeling of the harmonic structure of the speech spectrum uses several forms of low pass filters applied to a pitch codevector, the one yielding higher prediction gain (i.e. the lowest pitch prediction error) is selected and the associated pitch codebook parameters are forwarded.

    摘要翻译： 考虑到发送或存储和合成该宽带声音信号，用于对宽带信号进行数字编码的音调搜索方法和装置，特别地但不排他地是语音信号。 实现语音频谱谐波结构的有效建模的新方法和装置使用几种形式的应用于音调码矢量的低通滤波器，选择产生较高预测增益（即，最低音调预测误差）的一种形式，并且相关音调 码本参数被转发。

    Device and Method for Quanitizing and Inverse Quanitizing LPC Filters in a Super-Frame
    40.
    发明申请
    Device and Method for Quanitizing and Inverse Quanitizing LPC Filters in a Super-Frame 有权
    超帧中的泛化和反向排序LPC滤波器的装置和方法

    公开(公告)号：US20100023324A1

    公开(公告)日：2010-01-28

    申请号：US12501197

    申请日：2009-07-10

    申请人： Philippe Gournay ,  Bruno BESSETTE ,  Redwan Salami

    发明人： Philippe Gournay ,  Bruno BESSETTE ,  Redwan Salami

    IPC分类号： G10L19/14

    CPC分类号： G10L19/06 ,  G10L19/18 ,  H03M7/3082

    摘要： A device and a method for quantizing, in a super-frame including a sequence of frames, LPC filters calculated during the frames of the sequence. The LPC filter quantizing device and method comprises: an absolute quantizer for first quantizing one of the LPC filters using absolute quantization; and at least one quantizer of the other LPC filters using a quantization mode selected from the group consisting of absolute quantization and differential quantization relative to at least one previously quantized filter amongst the LPC filters. For inverse quantizing, at least the first quantized LPC filter is received and an inverse quantizer inverse quantizes the first quantized LPC filter using absolute inverse quantization. If any quantized LPC filter other than the first quantized LPC filter is received, an inverse quantizer inverse quantizes this quantized LPC filter using one of absolute inverse quantization and differential inverse quantization relative to at least one previously received quantized LPC filter.

    摘要翻译： 一种用于在包括帧序列的超帧中量化在序列的帧期间计算的LPC滤波器的装置和方法。 LPC滤波器量化装置和方法包括：绝对量化器，用于使用绝对量化首先量化LPC滤波器之一; 以及使用从相对于LPC滤波器中的至少一个先前量化的滤波器的绝对量化和差分量化组成的组中选择的量化模式的其它LPC滤波器的至少一个量化器。 对于逆量化，至少接收第一量化LPC滤波器，并且逆量化器使用绝对反量化对第一量化LPC滤波器进行逆量化。 如果接收到除了第一量化LPC滤波器之外的任何量化LPC滤波器，则逆量化器相对于至少一个先前接收的量化LPC滤波器，使用绝对反量子化和差分逆量化之一对该量化的LPC滤波器进行逆量化。