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公开(公告)号：US20090070118A1
公开(公告)日：2009-03-12
申请号：US11718611
申请日：2005-11-03
申请人： Albertus Cornelis Den Brinker , Felipe Riera Palou , Arnoldus Werner Johannes Oomen , Jean-Bernard Herve Marie Rault , David Sylvain Thierry Virette , Pierrick Jean-Louise Marie Philippe
发明人： Albertus Cornelis Den Brinker , Felipe Riera Palou , Arnoldus Werner Johannes Oomen , Jean-Bernard Herve Marie Rault , David Sylvain Thierry Virette , Pierrick Jean-Louise Marie Philippe
IPC分类号： G10L19/00
CPC分类号： G10L19/16 , G10L19/0204 , G10L19/08
摘要： An audio encoding device (100) comprises first encoding means (101, 111) for encoding transient signal components and/or sinusoidal signal components of an audio signal (x(n)) and producing a residual signal (z(n)), and second encoding means for encoding the residual signal. The second encoding means comprise filter means (122) for selecting at least two frequency bands of the residual signal. The selected frequency bands (LF, HF) of the residual signal (z(n)) are encoded by a first encoding unit (123) and a second encoding unit (124) respectively. The first encoding unit (123) may comprise a waveform encoder, such as a time-domain encoder, while the second encoding unit (124) may comprise a noise encoder.
摘要翻译： 音频编码装置（100）包括用于编码音频信号（x（n））的瞬态信号分量和/或正弦信号分量并产生残余信号（z（n））的第一编码装置， 用于对残差信号进行编码的第二编码装置。 第二编码装置包括用于选择残余信号的至少两个频带的滤波器装置（122）。 残差信号（z（n））的选定频带（LF，HF）分别由第一编码单元（123）和第二编码单元（124）编码。 第一编码单元（123）可以包括诸如时域编码器的波形编码器，而第二编码单元（124）可以包括噪声编码器。
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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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13.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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14.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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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：US07640156B2
公开(公告)日：2009-12-29
申请号：US10564656
申请日：2004-07-08
IPC分类号： G10L19/00
CPC分类号： G10L19/093
摘要： In a sinusoidal audio encoder a number of sinusoids are estimated per audio segment. A sinusoid is represented y frequency, amplitude and phase. Normally, phase is quantised independent of frequency The invention uses a frequency dependent quantisation of phase, and in particular the low frequencies are quantised using smaller quantisation intervals than at higher frequencies. Thus, the unwrapped phases of the lower frequencies are quantised more accurately, possibly with a smaller quantisation range, than the phases of the higher frequencies. The invention gives a significant improvement in decoded signal quality, especially for low bit-rate quantisers.
摘要翻译： 在正弦音频编码器中，每个音频段估计出多个正弦波。 正弦曲线表示y频率，振幅和相位。 通常，相位与频率无关地量化本发明使用相位的频率相关量化，特别是使用比较高频率更小的量化间隔量化低频。 因此，与较高频率的相位相比，更准确地量化更低频率的展开相位，可能具有较小的量化范围。 本发明给出了解码信号质量的显着改进，特别是对于低比特率量化器。
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公开(公告)号：US07587313B2
公开(公告)日：2009-09-08
申请号：US10598796
申请日：2005-03-08
IPC分类号： G10L19/14
CPC分类号： G10L19/20 , G10L19/022 , G10L19/093
摘要： The method creates an audio stream comprising tracks of sinusoidal components linked across a plurality of sequential time segments. Segments in each track are weighted with a normal window (WI, W2, W3), and consecutive segments have a normal period of overlap (0) of their trailing edges and leading edges. Segments in which a transient5 component is determined are weighted with a first modified window (WIm) having a modified trailing edge, and the following segment in the track is weighted with a second modified window (W2m) having a modified leading edge, so that the modified trailing edge and the modified leading edge have a modified period of overlap (0m) that comprises the transient component and that is shorter than the normal period of overlap (0), and wherein the audio stream includes sinusoidal codes representing the frequency and the transient. According to the invention, the modified period of overlap (0m) depends on the frequency value (f).
摘要翻译： 该方法创建包括跨多个连续时间段链接的正弦分量的轨道的音频流。 每个轨道中的段用正常窗口（WI，W2，W3）加权，并且连续的段具有其后沿和前沿的正常重叠周期（0）。 确定了瞬态5分量的分段用具有修改的后沿的第一修改窗口（WIm）加权，并且轨道中的下一分段被加权具有修改的前沿的第二修改窗口（W2m），使得 经修改的后沿和修改的前沿具有修改的重叠周期（0m），其包括瞬态分量并且短于正常重叠周期（0），并且其中音频流包括表示频率和瞬态的正弦代码 。 根据本发明，修改的重叠周期（0m）取决于频率值（f）。
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公开(公告)号：US20090106030A1
公开(公告)日：2009-04-23
申请号：US11718613
申请日：2005-11-02
IPC分类号： G10L19/00
CPC分类号： G10L19/06 , G10L19/093
摘要： There is described a method of encoding a signal (s(n)) in a coder (400) to generate a corresponding encoded bit-stream (x(n); STP). The method comprises steps of: (a) processing the signal (s(n)) to determine main sinusoidal components and transient components thereof to generate corresponding component parameters; (b) processing the signal (s(n)) by removing the sinusoidal and transient components therefrom to generate a residual signal (r(n)); (c) processing the residual signal (r(n)) to determine a spectral representation (PSD) and determining therefrom a spectral broadening measure (SBM); (d) determining from the residual signal (r(n)) spectral envelope parameters by linear prediction; and (e) combining the components parameters together with the spectral envelope parameters and the spectral broadening measure to generate the encoded bit-stream. The method is capable of reducing noise that would otherwise arise were the bitstream to be decoded not subjected to such spectral broadening.
摘要翻译： 描述了在编码器（400）中编码信号（s（n））以产生相应的编码比特流（x（n）; STP）的方法。 该方法包括以下步骤：（a）处理信号（s（n））以确定主正弦分量及其瞬态分量以产生相应的分量参数; （b）通过从其中去除正弦和瞬态分量来处理信号（s（n））以产生残差信号（r（n））; （c）处理残余信号（r（n））以确定频谱表示（PSD）并由此确定频谱展宽测量（SBM）; （d）通过线性预测从剩余信号（r（n））频谱包络参数确定; 和（e）将分量参数与频谱包络参数和频谱展宽测量结合在一起以产生编码比特流。 该方法能够减少否则将要解码的比特流不经受这种频谱展宽的噪声。
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