公开(公告)号：US08332213B2

公开(公告)日：2012-12-11

申请号：US12501188

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： G10L21/00

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

摘要： A multi-reference quantization device and method for quantizing an input LPC filter, comprises a plurality of differential quantizers using respective, different references, and a selector of a reference amongst the different references of the differential quantizers using a reference selection criterion. The input LPC filter is differentially quantized by the differential quantizer using the selected reference. A device and method for inverse quantizing a multi-reference differentially quantized LPC filter extracted from a bitstream, comprises an extractor from the bitstream of information about a reference amongst a plurality of possible references used for quantizing the multi-reference differentially quantized LPC filter, and a differential inverse quantizer using the reference corresponding to the extracted reference information to inverse quantize the multi-reference differentially quantized LPC filter.

摘要翻译： 用于量化输入LPC滤波器的多参考量化装置和方法包括使用各自不同参考的多个差分量化器和使用参考选择准则的差分量化器的不同参考中的参考选择器。 输入LPC滤波器通过使用所选参考的差分量化器进行差分量化。 一种用于对从比特流提取的多参考差分量化LPC滤波器进行逆量化的装置和方法，包括来自比特流的提取器，该信息涉及用于量化多参考差分量化LPC滤波器的多个可能参考中的参考，以及 使用对应于所提取的参考信息的参考来对多参考差分量化LPC滤波器进行逆量化的差分逆量化器。

公开(公告)号：US07933769B2

公开(公告)日：2011-04-26

申请号：US11708097

申请日：2007-02-15

申请人： Bruno Bessette

发明人： Bruno Bessette

IPC分类号： G10L19/04

CPC分类号： G10L19/0208 ,  G10L19/005 ,  G10L19/24 ,  G10L19/265 ,  G10L21/0232

摘要： In a method and device for low-frequency emphasis, where the spectrum of a sound signal is transformed in a frequency domain and comprises transform coefficients grouped in a number of blocks, a maximum energy for one block having a position index is calculated. Also, a factor having a position index smaller than the position index of the block with maximum energy is calculated for each block. For each block, an energy of the block is calculated, the factor is computed from the calculated maximum energy and the computed energy of the block, and a gain is determined from the factor and applied to the transform coefficients of the block.

摘要翻译： 在用于低频强调的方法和装置中，其中声频信号的频谱在频域中变换并且包括分组在多个块中的变换系数，计算具有位置索引的一个块的最大能量。 此外，针对每个块计算具有小于具有最大能量的块的位置索引的位置索引的因子。 对于每个块，计算块的能量，根据计算的最大能量和块的计算能量计算因子，并且根据因子确定增益并将其应用于块的变换系数。

公开(公告)号：US20050108007A1

公开(公告)日：2005-05-19

申请号：US10965795

申请日：2004-10-18

申请人： Bruno Bessette ,  Redwan Salami ,  Roch Lefebvre

发明人： Bruno Bessette ,  Redwan Salami ,  Roch Lefebvre

IPC分类号： G01L11/04 ,  G01L21/02 ,  G10L13/00 ,  G10L19/12 ,  H03H17/06 ,  H03M7/30 ,  H03M7/36 ,  H04B1/62 ,  H04B7/26 ,  H04B14/04 ,  H04Q7/22 ,  H04Q7/32 ,  G10L19/00

CPC分类号： G10L19/26 ,  G10L2019/0011

摘要： A perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal pre-emphasis filter, a synthesis filter calculator, and a perceptual weighting filter. The signal pre-emphasis filter enhances the high frequency content of the wideband signal to thereby produce a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the form: P(z)=1−μz−1, wherein μ is a pre-emphasis factor having a value located between 0 and 1. The synthesis filter calculator is responsive to the pre-emphasized signal for producing synthesis filter coefficients. Finally, the perceptual weighting filter processes the pre-emphasized signal in relation to the synthesis filter coefficients to produce the perceptually weighted signal. The perceptual weighting filter has a transfer function, with fixed denominator, of the form: W(z)=A(z/γ1)/(1−γ2z−1) where 0

摘要翻译： 用于响应于宽带信号产生感知加权信号的感知加权装置包括信号预加重滤波器，合成滤波器计算器和感知加权滤波器。 信号预加重滤波器增强了宽带信号的高频内容，从而产生预加重信号。 信号预加重滤波器具有以下形式的传递函数：P（z）= 1-muz -1，其中mu是具有位于0和1之间的值的预加重因子。 合成滤波器计算器响应预加重信号以产生合成滤波器系数。 最后，感知加权滤波器处理关于合成滤波器系数的预加重信号以产生感知加权信号。 感知加权滤波器具有如下形式的具有固定分母的传递函数：W（z）= A（z /γ1/ 2）/（1-γ2 其中0 <γ2<1 <1> <1> <1>

公开(公告)号：US20220319524A1

公开(公告)日：2022-10-06

申请号：US17596567

申请日：2020-07-07

申请人： VOICEAGE CORPORATION

发明人： Vaclav EKSLER

IPC分类号： G10L19/002 ,  G10L19/16 ,  G10L19/008

摘要： A system and method code an object-based audio signal comprising audio objects in response to audio streams with associated metadata. In the system and method, a metadata processor codes the metadata and generates information about bit-budgets for the coding of the metadata of the audio objects. An encoder codes the audio streams while a bit-budget allocator is responsive to the information about the bit-budgets for the coding of the metadata of the audio objects from the metadata processor to allocate bitrates for the coding of the audio streams by the encoder.

公开(公告)号：US20220180884A1

公开(公告)日：2022-06-09

申请号：US17602071

申请日：2020-05-01

申请人： VOICEAGE CORPORATION

发明人： Vaclav Eksler

IPC分类号： G10L19/22 ,  G10L25/21 ,  G10L25/93

摘要： A method and device for detecting an attack in a sound signal to be coded wherein the sound signal is processed in successive frames each including a number of sub-frames. The device comprises a first-stage attack detector for detecting the attack in a last sub-frame of a current frame, and a second-stage attack detector for detecting the attack in one of the sub-frames of the current frame, including the sub-frames preceding the last sub-frame. No attack is detected when the current frame is not an active frame previously classified to be coded using a generic coding mode. A method and device for coding an attack in a sound signal are also provided. The coding device comprises the above mentioned attack detecting device and an encoder of the sub-frame comprising the detected attack using a transition coding mode using a glottal-shape codebook populated with glottal impulse shapes.

公开(公告)号：US20190228785A1

公开(公告)日：2019-07-25

申请号：US16369156

申请日：2019-03-29

申请人： VoiceAge Corporation

发明人： Tommy Vaillancourt ,  Milan Jelinek

IPC分类号： G10L19/008 ,  G10L25/51 ,  G10L25/21 ,  H04S1/00 ,  G10L19/032 ,  G10L19/002 ,  G10L25/03 ,  G10L19/09 ,  G10L19/24 ,  G10L19/06

摘要： A stereo sound signal encoding method and system for time domain down mixing right and left channels of an input stereo sound signal into primary and secondary channels, determine normalised correlations of the left channel and right channel in relation to a monophonic signal version of the sound. A long-term correlation difference is determined on the basis of the normalised correlation of the left channel and the normalized correlation of the right channel. The long-term correlation difference is converted into a factor β, and the left and right channels are mixed to produce the primary and secondary channels using the factor β, wherein the factor β determines respective contributions of the left and right channels upon production of the primary and secondary channels.

公开(公告)号：US10115408B2

公开(公告)日：2018-10-30

申请号：US15610268

申请日：2017-05-31

申请人： VOICEAGE CORPORATION

发明人： Vladimir Malenovsky

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

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.

公开(公告)号：US09384755B2

公开(公告)日：2016-07-05

申请号：US14196585

申请日：2014-03-04

申请人： VOICEAGE CORPORATION

发明人： Tommy Vaillancourt ,  Milan Jelinek

IPC分类号： G10L21/0208 ,  G10L19/26 ,  G10L25/78 ,  G10L25/93 ,  G10L25/21

CPC分类号： G10L19/26 ,  G10L19/08 ,  G10L19/12 ,  G10L21/0208 ,  G10L21/0224 ,  G10L21/0232 ,  G10L25/21 ,  G10L25/78 ,  G10L25/93

摘要： The present disclosure relates to a device and method for reducing quantization noise in a signal contained in a time-domain excitation decoded by a time-domain decoder. The decoded time-domain excitation is converted into a frequency-domain excitation. A weighting mask is produced for retrieving spectral information lost in the quantization noise. The frequency-domain excitation is modified to increase spectral dynamics by application of the weighting mask. The modified frequency-domain excitation is converted into a modified time-domain excitation. The method and device can be used for improving music content rendering of linear-prediction (LP) based codecs. Optionally, a synthesis of the decoded time-domain excitation may be classified into one of a first set of excitation categories and a second set of excitation categories, the second set including INACTIVE or UNVOICED categories, the first set including an OTHER category.

摘要翻译： 本公开涉及用于减少由时域解码器解码的时域激励中包含的信号中的量化噪声的装置和方法。 解码的时域激发被转换成频域激励。 产生用于检索在量化噪声中丢失的光谱信息的加权掩码。 通过应用加权掩模来修改频域激发以增加光谱动力学。 修改的频域激发被转换成修改的时域激励。 该方法和装置可用于改进基于线性预测（LP）的编解码器的音乐内容呈现。 可选地，解码的时域激励的合成可以分类为第一组激励类别和第二组激励类别中的一个，第二组包括INACTIVE或UNVOICED类别，第一组包括OTHER类别。

公开(公告)号：US08712764B2

公开(公告)日：2014-04-29

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： G10L19/04

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。

公开(公告)号：US08626517B2

公开(公告)日：2014-01-07

申请号：US12905750

申请日：2010-10-15

申请人： Bruno Bessette

发明人： Bruno Bessette

IPC分类号： G10L19/08 ,  G10L19/12

CPC分类号： G10L19/26 ,  G10L19/0204 ,  G10L19/0212 ,  G10L19/032 ,  G10L19/18 ,  G10L21/0208 ,  G10L2019/0008

摘要： A frequency-domain noise shaping method and device interpolates a spectral shape and a time-domain envelope of a quantization noise in a windowed and transform-coded audio signal. In the method and device, transform coefficients of the windowed and transform-coded audio signal are split into a plurality of spectral bands. For each spectral band, a first gain representing a spectral shape of the quantization noise at a first transition between a first time window and a second time window is calculated, a second gain representing a spectral shape of the quantization noise at a second transition between the second time window and a third time window is calculated, and the transform coefficients of the second time window are filtered based on the first and second gains, to interpolate between the first and second transitions the spectral shape and the time-domain envelope of the quantization noise.

摘要翻译： 频域噪声整形方法和装置在窗口化和变换编码的音频信号中内插量化噪声的频谱形状和时域包络。 在该方法和装置中，窗口化和变换编码的音频信号的变换系数被分成多个频谱带。 对于每个光谱带，计算表示在第一时间窗口和第二时间窗口之间的第一转换处的量化噪声的光谱形状的第一增益，第二增益表示在第一时间窗口和第二时间窗口之间的第二过渡处的量化噪声的光谱形状 计算第二时间窗口和第三时间窗口，并且基于第一和第二增益对第二时间窗口的变换系数进行滤波，以在第一和第二转换之间插值量化的频谱形状和时域包络 噪声。