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公开(公告)号：US20120076307A1
公开(公告)日：2012-03-29
申请号：US13375035
申请日：2010-05-31
IPC分类号： H04R5/00
CPC分类号： H04S3/002 , G10L19/008
摘要： An audio apparatus comprises a processor (101) for providing a set of audio channels. A prediction circuit (103) generates a predicted signal for a first channel by adaptive filtering of a second channel by an adaptive filter. An adaptation processor (105) adapts the adaptive filter to minimize a cost function indicative of a difference between the predicted signal and the first channel. A compensation processor (107) then generates a non-predicted signal by compensating the first signal for the predicted signal and a distribution processor (109) generates an output set of audio channels by distributing at least the predicted signal and the non-predicted signal over the output set of audio signals where the distribution is different for the predicted signal and the non-predicted signal. The cross-channel predictive filtering provides signal components that represent different spatial characteristics of the originating sound and which are therefore advantageously distributed differently for the output channels.
摘要翻译： 音频装置包括用于提供一组音频通道的处理器（101）。 预测电路（103）通过自适应滤波器对第二信道进行自适应滤波，生成第一信道的预测信号。 适配处理器（105）使自适应滤波器适配，以最小化指示预测信号和第一信道之间的差异的成本函数。 补偿处理器（107）然后通过补偿预测信号的第一信号来产生非预测信号，并且分配处理器（109）通过至少分配预测信号和非预测信号来生成音频信道的输出集合 其中对于预测信号和非预测信号的分布不同的音频信号的输出组。 交叉通道预测滤波提供了表示起始声音的不同空间特征的信号分量，因此有利地为输出声道分配不同的信号分量。
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公开(公告)号：US20080215330A1
公开(公告)日：2008-09-04
申请号：US11996364
申请日：2006-07-18
IPC分类号： G10L13/00
CPC分类号： G10L21/00 , G10L19/06 , G10L2021/0135 , H04R25/353
摘要： A method of modifying an audio signal comprises the steps of analyzing the input audio signal (x) so as to produce a set of filter parameters (p) and a residual signal (r), modifying the set of filter parameters (p) so as to produce a modified set of filter parameters (p′), and synthesizing an output audio signal (y) using the modified set of filter parameters (p′) and the residual signal (r). The set of filter parameters (p) comprises poles (λA) and coefficients (a; c). The step of modifying the filter parameters (p) involves interpolating lattice filter reflection coefficients (c) so as to scale the spectral envelope of the audio signal.
摘要翻译： 修改音频信号的方法包括分析输入音频信号（x）以产生一组滤波器参数（p）和残差信号（r）的步骤，修改滤波器参数集合（p），以便 以产生经修改的滤波器参数集合（p'），并且使用修改的滤波器参数（p'）和残余信号（r）来合成输出音频信号（y）。 滤波器参数（p）的集合包括极（λΛA）和系数（a; c）。 修改滤波器参数（p）的步骤涉及内插滤波器反射系数（c），以便缩放音频信号的频谱包络。
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公开(公告)号：US08065136B2
公开(公告)日：2011-11-22
申请号：US12871183
申请日：2010-08-30
申请人： Gerard Herman Hotho , Dirk Jeroen Breebaart , Evgeny Alexandrovitch Verbitskiy , Albertus Cornelis Den Brinker
发明人： Gerard Herman Hotho , Dirk Jeroen Breebaart , Evgeny Alexandrovitch Verbitskiy , Albertus Cornelis Den Brinker
IPC分类号： G10L11/00
CPC分类号： G10L19/02 , G10L19/008 , G10L19/0204 , H04S3/008
摘要： In a method of encoding input signals (CH1 to CH3; 400 to 450) in a multi-channel encoder (5; 15) to generate corresponding output data having down-mix output signals (610, 620) together with complementary parametric data (600), the method includes a first step of down-mixing input signals (CH1 to CH3; 400 to 450) to generate the corresponding down-mix output signals (610, 620), and a second step of processing the input signals (CH1 to CH3; 400 to 450) during down-mixing to generate the parametric data (600) complementary to the down-mix output signals (610, 620). Processing of the input signals (CH1 to CH3; 400 to 450) involves including information in the down-mix signals (610, 620) which is useable during subsequent decoding of the down-mix output signals (610, 620) and the parametric data (600) to determine at least some parameter data and thereby enabling representations of the input signals (CH1 to CH3; 400 to 450) to be subsequently regenerated.
摘要翻译： 在多通道编码器（5; 15）中编码输入信号（CH1至CH3; 400至450）的方法中，以产生具有下混合输出信号（610,620）的相应输出数据以及互补参数数据（600 ），该方法包括将输入信号（CH1至CH3; 400至450）进行下混合以产生相应的下混合输出信号（610,620）的第一步骤，以及将输入信号（CH1至 CH3; 400至450），以产生与下混合输出信号（610,620）互补的参数数据（600）。 输入信号（CH1至CH3; 400至450）的处理涉及将缩减混合信号（610,620）中的信息包括在下混合输出信号（610,620）的随后解码期间可用的信息和参数数据 （600）以确定至少一些参数数据，从而使得能够随后再生所述输入信号（CH1至CH3; 400至450）的表示。
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公开(公告)号：US07739106B2
公开(公告)日：2010-06-15
申请号：US09885707
申请日：2001-06-20
IPC分类号： G10L19/14
CPC分类号： G10L19/02
摘要： Encoding (2) a signal (A) is provided, wherein frequency and amplitude information of at least one sinusoidal component in the signal (A) is determined (20), and sinusoidal parameters (f,a) representing the frequency and amplitude information are transmitted (22), and wherein further a phase jitter parameter (p) is transmitted, which represents an amount of phase jitter that should be added during restoring the sinusoidal component from the transmitted sinusoidal parameters (f,a).
摘要翻译： 编码（2）信号（A），其中确定信号（A）中的至少一个正弦分量的频率和振幅信息（20），表示频率和振幅信息的正弦参数（f，a） （22），并且其中进一步发送相位抖动参数（p），其表示在从发射的正弦波参数（f，a）恢复正弦分量期间应该添加的相位抖动量。
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公开(公告)号：US07499852B2
公开(公告)日：2009-03-03
申请号：US11115465
申请日：2005-04-27
IPC分类号： G10L21/06
CPC分类号： G10L19/02
摘要： Coding (1) of an audio signal is provided including estimating (110) a position of a transient signal component in the audio signal, matching (111,112) a shape function on the transient signal component in case the transient signal component is gradually declining after an initial increase, which shape function has a substantially exponential initial behavior and a substantially logarithmic declining behavior; and including (15) the position and shape parameters describing the shape function in an audio stream (AS).
摘要翻译： 提供音频信号的编码（1）包括估计（110）音频信号中的瞬态信号分量的位置，匹配（111,112）瞬态信号分量上的形状函数，以便在瞬态信号分量在 初始增加，该形状函数具有基本指数的初始行为和基本上对数的下降行为; 并且包括（15）描述音频流（AS）中的形状函数的位置和形状参数。
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6.发明授权Inverse filtering method, synthesis filtering method, inverse filter device, synthesis filter device and devices comprising such filter devices 有权逆滤波方法，合成滤波方法，逆滤波器装置，合成滤波器装置和包括这种滤波器装置的装置公开(公告)号：US07263542B2
公开(公告)日：2007-08-28
申请号：US10476041
申请日：2002-04-29
IPC分类号： G06F17/10
CPC分类号： G10L19/04
摘要： An inverse filtering method, comprising: generating a first filtered signal based on an input signal; and combining the first filtered signal with the input signal for obtaining a residual signal. The generating comprises: generating at least two second filtered signals, each of said second filtered signals not significantly delayed in time relative to each other, the generating being stable and causal; and amplifying at least one of the second filtered signals with a prediction coefficient.
摘要翻译： 一种逆滤波方法，包括：基于输入信号产生第一滤波信号; 以及将所述第一滤波信号与所述输入信号组合以获得残留信号。 所述产生包括：产生至少两个第二滤波信号，所述第二滤波信号中的每一个在时间上相对于彼此没有显着延迟，所述生成是稳定和因果的; 以及用预测系数来放大所述第二滤波信号中的至少一个信号。
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公开(公告)号：US07146324B2
公开(公告)日：2006-12-05
申请号：US10278386
申请日：2002-10-23
申请人： Albertus Cornelis Den Brinker , Andreas Johannes Gerrits , Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Christophe Alain Bernard Hoeppe
发明人： Albertus Cornelis Den Brinker , Andreas Johannes Gerrits , Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Christophe Alain Bernard Hoeppe
IPC分类号： G10L19/00
CPC分类号： G10L19/02
摘要： Coding of an audio signal is provided where an indicator of the frequency variation of sinusoidal components of the signal is used in the tracking algorithm of a sinusoidal coder where sinusoidal parameters from appropriate sinusoids from consecutive segments are linked. By applying an indicator such as a warp factor or polynomial fitting, more accurate tracks are obtained. As a result, the sinusoids can be encoded more efficiently. Furthermore, a better audio quality can be obtained by improved phase continuation.
摘要翻译： 提供音频信号的编码，其中在正弦曲线编码器的跟踪算法中使用信号的正弦分量的频率变化的指示符，其中来自连续段的适当的正弦曲线的正弦参数被链接。 通过应用诸如翘曲因子或多项式拟合的指示器，获得更准确的轨迹。 结果，可以更有效地编码正弦波。 此外，通过改进相位延续可以获得更好的音频质量。
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8.发明授权公开(公告)号：US07742912B2
公开(公告)日：2010-06-22
申请号：US11570522
申请日：2005-06-14
CPC分类号： G10L19/008 , G10L19/04 , G10L25/12 , G10L25/27
摘要： An encoder (100) for encoding a multi-channel audio signal comprises a prediction processor (101) for generating two residual signals for two signal components of the multi-channel signal by linear prediction which is associated with psycho-acoustic characteristics and which specifically uses psycho-acoustic prediction filters; a rotation processor (105) for rotating the combined signal of the two residual signals to generate a main signal and a side signal, in which the energy of the main signal is maximized and the energy of the side signal is minimized; an encoding processor (109) for encoding the main and preferably the side signal; and an output processor (111) for generating an output signal data, prediction parameters and rotation parameters.
摘要翻译： 用于对多声道音频信号进行编码的编码器（100）包括预测处理器（101），用于通过与心理声学特性相关联的线性预测产生用于多声道信号的两个信号分量的两个残余信号，并且具体使用 心理预测滤波器; 旋转处理器（105），用于旋转所述两个残余信号的组合信号以产生主信号和侧信号，其中主信号的能量最大化并且侧信号的能量最小化; 编码处理器（109），用于对主要和优选的侧面信号进行编码; 以及用于产生输出信号数据，预测参数和旋转参数的输出处理器（111）。
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公开(公告)号：US20100131276A1
公开(公告)日：2010-05-27
申请号：US11995345
申请日：2006-07-06
IPC分类号： G10L13/00
CPC分类号： G10L13/033 , G10L19/093 , G10L2021/0135
摘要： A device (2) for changing the pitch of an audio signal (r), such as a speech signal, comprises a sinusoidal analysis unit (21) for determining sinusoidal parameters of the audio signal (r), a parameter production unit (22) for predicting the phase of a sinusoidal component, and a sinusoidal synthesis unit (23) for synthesizing the parameters to produce a reconstructed signal (r′). The parameter production unit (22) receives, for each time segment of the audio signal, the phase of the previous time segment to predict the phase of the current time segment.
摘要翻译： 用于改变诸如语音信号的音频信号（r）的音高的装置（2）包括用于确定音频信号（r）的正弦参数的正弦分析单元（21），参数产生单元（22） 用于预测正弦分量的相位;以及正弦合成单元（23），用于合成参数以产生重构信号（r'）。 参数产生单元（22）针对音频信号的每个时间段接收前一时间段的相位，以预测当前时间段的相位。
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公开(公告)号：US20080312915A1
公开(公告)日：2008-12-18
申请号：US11569779
申请日：2005-06-03
CPC分类号： G10L19/06
摘要： A hybrid sinusoidal/pulse excitation encoder has been recently proposed for constructing a scalable audio encoder The base layer consisting of data supplied by the sinusoidal encoder retains the main features of the input signal achieving medium to high quality audio at a very low bit rate. Quality can be further enhanced by adding excitation signal layers associated with a decreasing decimation that increasingly model more subtle aspects of the original signal. The invention provides a method of mixing the different excitation signal layers so that the full concept of scalability is realised without compromising the quality of the encoded signals. The mixing is controlled via a quality parameter that weights the significance of previous layers when constructing a new higher layer.
摘要翻译： 最近提出了一种用于构建可伸缩音频编码器的混合正弦/脉冲激励编码器。由正弦编码器提供的数据组成的基本层保留输入信号的主要特征，以非常低的比特率实现中等到高质量的音频。 通过添加与减少抽取相关联的激励信号层，可以进一步提高质量，从而越来越多地模拟原始信号的更微妙方面。 本发明提供了一种混合不同激励信号层的方法，从而实现可扩展性的全部概念，而不损害编码信号的质量。 混合是通过质量参数进行控制的，质量参数在构建新的较高层时对先前层的重要性进行加权。
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