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公开(公告)号：US09167367B2
公开(公告)日：2015-10-20
申请号：US13502316
申请日：2010-10-15
IPC分类号： H04R5/00 , H04S3/00 , G10L19/008 , G10L19/16
CPC分类号： H04S3/008 , G10L19/008 , G10L19/167 , H04S2420/03
摘要： A parametric coding method and apparatus are provided for coding a multichannel digital audio signal. The method includes a coding step for coding a signal from a channel reduction matrixing of the multichannel signal. The coding method also includes: obtaining, for each frame of predetermined length, spatial information parameters of the multichannel signal; dividing the spatial information parameters into a plurality of blocks of parameters; selecting a block of parameters as a function of the index of the current frame; and coding the block of parameters selected for the current frame.
摘要翻译： 提供了一种用于对多声道数字音频信号进行编码的参数编码方法和装置。 该方法包括：编码步骤，用于对来自多信道信号的信道减少矩阵化的信号进行编码。 编码方法还包括：对于每个预定长度的帧，获得多信道信号的空间信息参数; 将空间信息参数划分为多个参数块; 选择作为当前帧的索引的函数的参数块; 并编码为当前帧选择的参数块。
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公开(公告)号：US20120207311A1
公开(公告)日：2012-08-16
申请号：US13502316
申请日：2010-10-15
IPC分类号： H04R5/00
CPC分类号： H04S3/008 , G10L19/008 , G10L19/167 , H04S2420/03
摘要： A parametric coding method and apparatus are provided for coding a multichannel digital audio signal. The method includes a coding step for coding a signal from a channel reduction matrixing of the multichannel signal. The coding method also includes: obtaining, for each frame of predetermined length, spatial information parameters of the multichannel signal; dividing the spatial information parameters into a plurality of blocks of parameters; selecting a block of parameters as a function of the index of the current frame; and coding the block of parameters selected for the current frame.
摘要翻译： 提供了一种用于对多声道数字音频信号进行编码的参数编码方法和装置。 该方法包括：编码步骤，用于对来自多信道信号的信道减少矩阵化的信号进行编码。 编码方法还包括：对于每个预定长度的帧，获得多信道信号的空间信息参数; 将空间信息参数划分为多个参数块; 选择作为当前帧的索引的函数的参数块; 并编码为当前帧选择的参数块。
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公开(公告)号：US20120265542A1
公开(公告)日：2012-10-18
申请号：US13502319
申请日：2010-10-15
IPC分类号： G10L19/00
CPC分类号： G10L19/008
摘要： A method and decoder are provided for parametrically decoding a stereo digital audio signal. The method includes synthesizing the stereo signal, per frequency sub-band, on the basis of a decoded mono signal ({circumflex over (M)}[j]), arising from a downmix of the stereo signal and from spatial information parameters of the stereo signal, in such a way that the signals obtained have the following form: L ^ [ j ] = c 1 [ j ] · M ^ 1 [ j ] R ^ [ j ] = c 2 [ j ] · M ^ 2 [ j ] , with {circumflex over (L)}[j] and {circumflex over (R)}[j] being channels of the synthesized signal, {circumflex over (M)}1[j] and {circumflex over (M)}2[j] being signals that are a function of the decoded mono signal and c1[j], c2[j] being gains, wherein the gains are calculated as follows: c 1 [ j ] = 2 I ^ [ j ] I ^ [ j ] + 1 c 2 [ j ] = 2 I ^ [ j ] + 1 with Î[j] being an amplitude ratio between the two channels of the stereo signal, obtained from the decoded parameters.
摘要翻译： 提供了一种用于对立体声数字音频信号进行参数解码的方法和解码器。 该方法包括：基于由立体声信号的下混合产生的解码单声道信号（{回旋（M）} [j]），从每个频率子带合成立体声信号，并根据 立体声信号，使得获得的信号具有以下形式：L ^ [j] = c 1 [j]·M ^ 1 [j] R ^ [j] = c 2 [j] （M）} 1 [j]中的{回旋（L）} [j]和{convflex over（R）} [j]是合成信号的通道， 2（j）是作为解码单声道信号的函数的信号，c1 [j]，c2 [j]是增益，其中增益计算如下：c 1 [j] = [j] + 1 c 2 [j] = 2 I ^ [j] + 1，其中Î[j]是立体声信号的两个声道之间的振幅比， 从解码参数获得。
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公开(公告)号：US20130262130A1
公开(公告)日：2013-10-03
申请号：US13880885
申请日：2011-10-18
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： A method and apparatus for the parametric encoding of a stereo digital-audio signal. The method includes encoding a mono signal produced by downmixing applied to the stereo signal and encoding spatialisation information of the stereo signal. Downmixing includes determining, for a predetermined set of frequency sub-bands, a phase difference between two stereo channels; obtaining an intermediate channel by rotating a first predetermined channel of the stereo signal through an angle obtained by reducing the phase difference; determining the phase of the mono signal from the phase of the signal that is the sum of the intermediate channel and the second stereo signal, and from a phase difference between, on the one hand, the signal that is the sum of the intermediate channel and the second channel and, on the other hand, the second channel of the stereo signal. Also provided are a decoding method, an encoder and a decoder.
摘要翻译： 一种用于立体声数字音频信号的参数编码的方法和装置。 该方法包括对应用于立体声信号的下混合产生的单声道信号进行编码，并对立体声信号的空间化信息进行编码。 对于预定的一组频率子频带，确定两个立体声声道之间的相位差; 通过使立体声信号的第一预定通道旋转通过减小相位差而获得的角度来获得中间通道; 从作为中间信道和第二立体声信号的和的信号的相位确定单声道信号的相位，并且从一方面确定作为中间信道和第二立体声信号的和的信号之间的相位差 第二通道，另一方面是立体声信号的第二通道。 还提供了解码方法，编码器和解码器。
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5.发明申请SYMBOL PLANE ENCODING/DECODING WITH DYNAMIC CALCULATION OF PROBABILITY TABLES 审中-公开符号表达式编码/解码与动态表的动态计算公开(公告)号：US20110116542A1
公开(公告)日：2011-05-19
申请号：US12674885
申请日：2008-07-25
IPC分类号： H04B1/66
CPC分类号： H03M7/30 , G10L19/00 , H03M7/4006 , H04N19/13 , H04N19/184
摘要： The invention relates to an arithmetic encoding by bit planes (MSB, . . . , LSB), that comprises using tables of probability to have a 0 or 1 bit for encoding each bit plane. According to an embodiment of the invention, the probability tables are calculated dynamically for each signal frame based on a probability density model (Mod) corresponding to the distribution (H) of the signal (X) on each frame.
摘要翻译： 本发明涉及通过位平面（MSB，...，LSB）的算术编码，其包括使用概率表具有用于编码每个位平面的0或1位。 根据本发明的实施例，基于与每个帧上的信号（X）的分布（H）相对应的概率密度模型（Mod），针对每个信号帧动态地计算概率表。
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公开(公告)号：US09269361B2
公开(公告)日：2016-02-23
申请号：US13880885
申请日：2011-10-18
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： A method and apparatus for the parametric encoding of a stereo digital-audio signal. The method includes encoding a mono signal produced by downmixing applied to the stereo signal and encoding spatialization information of the stereo signal. Downmixing includes determining, for a predetermined set of frequency sub-bands, a phase difference between two stereo channels; obtaining an intermediate channel by rotating a first predetermined channel of the stereo signal through an angle obtained by reducing the phase difference; determining the phase of the mono signal from the phase of the signal that is the sum of the intermediate channel and the second stereo signal, and from a phase difference between, on the one hand, the signal that is the sum of the intermediate channel and the second channel and, on the other hand, the second channel of the stereo signal. Also provided are a decoding method, an encoder and a decoder.
摘要翻译： 一种用于立体声数字音频信号的参数编码的方法和装置。 该方法包括对应用于立体声信号的下混合产生的单声道信号进行编码，并对立体声信号的空间化信息进行编码。 对于预定的一组频率子频带，确定两个立体声声道之间的相位差; 通过使立体声信号的第一预定通道旋转通过减小相位差而获得的角度来获得中间通道; 从作为中间信道和第二立体声信号的和的信号的相位确定单声道信号的相位，并且从一方面确定作为中间信道和第二立体声信号的和的信号之间的相位差 第二通道，另一方面是立体声信号的第二通道。 还提供了解码方法，编码器和解码器。
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