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1. 发明申请

WO2011124616A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124616A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055369
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency- domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.
摘要翻译：本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并且包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。该方法包括在混合之前或之后选择性地执行频域修改。

2. 发明申请

WO2011124621A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124621A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055374
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars
IPC分类号： G10L19/00 , H04B1/66
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel,the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises applying independent bandwidth limits for the input channels.
摘要翻译：本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。该方法包括对输入通道应用独立的带宽限制。

3. 发明申请

WO2011124473A1 AUDIO ENCODER, AUDIO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO SIGNALS USING COMPLEX PREDICTION 审中-公开
标题翻译：音频编码器，音频解码器和使用复杂预测处理多通道音频信号的相关方法
公开(公告)号：WO2011124473A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/054485
申请日：2011-03-23
申请人： FRAUNHOFER-GESELLSCHAFT DER ANGEWANDTEN FORSCHUNG E.V. , DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , VILLEMOES, Lars , ROBILLARD, Julien , NEUSINGER, Matthias , HELMRICH, Christian , HILPERT, Johannes , RETTELBACH, Nikolaus , DISCH, Sascha , EDLER, Bernd
IPC分类号： G10L19/00 , G10L19/04
CPC分类号： G10L19/04 , G10L19/008
摘要： An audio encoder and an audio decoder are based on a combination of two audio channels (201, 202) to obtain a first combination signal (204) as a mid signal and a residual signal (205) which can be derived using a predicted side signal derived from the mid signal. The first combination signal and the prediction residual signal are encoded (209) and written (212) into a data stream (213) together with the prediction information (206) derived by an optimizer (207) based on an optimization target (208). A decoder uses the prediction residual signal, the first combination signal and the prediction information to derive a decoded first channel signal and a decoded second channel signal. In an encoder example or in a decoder example, a real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. For calculating the prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.
摘要翻译：音频编码器和音频解码器基于两个音频通道（201,202）的组合，以获得作为中间信号的第一组合信号（204）和可以使用预测侧信号导出的残留信号（205）从中间信号导出。基于优化目标（208），将第一组合信号和预测残差信号与由优化器（207）导出的预测信息（206）一起编码（209）并写入（212）到数据流（213）中。解码器使用预测残差信号，第一组合信号和预测信息来导出解码的第一信道信号和解码的第二信道信号。在编码器示例或解码器示例中，可以应用实 - 虚变换来估计第一组合信号的频谱的虚部。为了计算在推导预测残差信号中使用的预测信号，将实值第一组合信号乘以复数预测信息的实部，并将第一组合信号的估计虚部乘以假想部分复杂的预测信息。

4. 发明申请

WO2011124608A1 MDCT-BASED COMPLEX PREDICTION STEREO CODING 审中-公开
标题翻译：基于MDCT的复杂预测立体声编码
公开(公告)号：WO2011124608A1
公开(公告)日：2011-10-13
申请号：PCT/EP2011/055350
申请日：2011-04-06
申请人： DOLBY INTERNATIONAL AB , CARLSSON, Pontus , PURNHAGEN, Heiko , VILLEMOES, Lars
发明人： CARLSSON, Pontus , PURNHAGEN, Heiko , VILLEMOES, Lars
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/0212 , G10L19/06 , G10L19/167 , G10L25/12 , H04S3/008 , H04S2400/01
摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The upmixing can be suspended responsive to control data.
摘要翻译：本发明提供了在频域中使用复数预测的立体声编码和解码的方法和装置。在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。响应于控制数据可以暂停上混合。

5. 发明申请

WO2010105926A3 ADVANCED STEREO CODING BASED ON A COMBINATION OF ADAPTIVELY SELECTABLE LEFT/RIGHT OR MID/SIDE STEREO CODING AND OF PARAMETRIC STEREO CODING 审中-公开
公开(公告)号：WO2010105926A3
公开(公告)日：2010-09-23
申请号：PCT/EP2010/052866
申请日：2010-03-05
申请人： DOLBY INTERNATIONAL AB , PURNHAGEN, Heiko , CARLSSON, Pontus , KJÖRLING, Kristofer
发明人： PURNHAGEN, Heiko , CARLSSON, Pontus , KJÖRLING, Kristofer
IPC分类号： G10L19/00
摘要： The application relates to audio encoder and decoder systems. An embodiment of the encoder system comprises a downmix stage for generating a downmix signal and a residual signal based on a stereo signal. In addition, the encoder system comprises a parameter determining stage for determining parametric stereo parameters such as an inter-channel intensity difference and an inter-channel cross-correlation. Preferably, the parametric stereo parameters are time- and frequency-variant. Moreover, the encoder system comprises a transform stage. The transform stage generates a pseudo left/right stereo signal by performing a transform based on the downmix signal and the residual signal. The pseudo stereo signal is processed by a perceptual stereo encoder. For stereo encoding, left/right encoding or mid/side encoding is selectable. Preferably, the selection between left/right stereo encoding and mid/side stereo encoding is time- and frequency-variant.

6. 发明申请

WO2009086919A1 AUDIO ENCODER AND DECODER 审中-公开
标题翻译：音频编码器和解码器
公开(公告)号：WO2009086919A1
公开(公告)日：2009-07-16
申请号：PCT/EP2008/011145
申请日：2008-12-30
申请人： DOLBY SWEDEN AB , BISWAS, Arijit , PURNHAGEN, Heiko , KJÖRLING, Kristofer , RESCH, Barbara , VILLEMOES, Lars, Falck , HEDELIN, Per, Henrik
发明人： BISWAS, Arijit , PURNHAGEN, Heiko , KJÖRLING, Kristofer , RESCH, Barbara , VILLEMOES, Lars, Falck , HEDELIN, Per, Henrik
IPC分类号： G10L19/00
CPC分类号： G10L19/26 , G10L19/008 , G10L19/032 , G10L19/035
摘要： The present invention teaches a new audio coding system that can code both general audio and speech signals well at low bit rates. A proposed audio coding system comprises a linear prediction unit for filtering an input signal based on an adaptive filter; a transformation unit for transforming a frame of the filtered input signal into a transform domain; a quantization unit for quantizing a transform domain signal; a long term prediction unit for determining an estimation of the frame of the filtered input signal based on a reconstruction of a previous segment of the filtered input signal; and a transform domain signal combination unit for combining, in the transform domain, the long term prediction estimation and the transformed input signal to generate the transform domain signal.
摘要翻译：本发明教导了一种新的音频编码系统，其可以以低比特率良好地对一般音频和语音信号进行编码。所提出的音频编码系统包括：基于自适应滤波器对输入信号进行滤波的线性预测单元; 变换单元，用于将经滤波的输入信号的帧变换为变换域; 用于量化变换域信号的量化单元; 一个长期预测单元，用于基于经滤波的输入信号的先前段的重建来确定滤波输入信号的帧的估计; 以及变换域信号组合单元，用于在变换域中组合长期预测估计和变换的输入信号，以生成变换域信号。

7. 发明申请

WO2006048203A1 METHODS FOR IMPROVED PERFORMANCE OF PREDICTION BASED MULTI-CHANNEL RECONSTRUCTION 审中-公开
标题翻译：改进基于预测的多通道重建性能的方法
公开(公告)号：WO2006048203A1
公开(公告)日：2006-05-11
申请号：PCT/EP2005/011586
申请日：2005-10-28
申请人： CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
发明人： VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/04 , H04S2420/03
摘要： For a multi-channel reconstruction of audio signals based on at least one base channel, an energy measure is used for compensating energy losses due to an predictive upmix. The energy measure can be applied in the encoder or the decoder. Furthermore, a decorrelated signal is added to output channels generated by an energy-loss introducing upmix procedure. The energy of the decorrelated signal is smaller than or equal to an energy error introduced by the predictive upmix. Thus, problems occurring for prediction based up-mix methods such as up-mixing signals that are coded with High Frequency Reconstruction techniques are solved, so that the correct correlation between the up-mixed channels is obtained or the up-mix is adapted to arbitrary down-mixes.
摘要翻译：对于基于至少一个基本信道的音频信号的多声道重建，能量测量被用于由于预测上混补偿能量损失。能量测量可以应用于编码器或解码器。此外，将去相关信号添加到通过能量损失引入上混程序产生的输出通道。解相关信号的能量小于或等于由预测上混引入的能量误差。因此，解决了用于基于预测的上混合方法（例如用高频重建技术编码的上混合信号）所出现的问题，从而获得上混合信道之间的正确相关性，或者将混合信号适配为任意的下混合。

8. 发明申请

WO2005101371A1 METHOD FOR REPRESENTING MULTI-CHANNEL AUDIO SIGNALS 审中-公开
标题翻译：用于表示多通道音频信号的方法
公开(公告)号：WO2005101371A1
公开(公告)日：2005-10-27
申请号：PCT/EP2005/003849
申请日：2005-04-12
申请人： CODING TECHNOLOGIES AB , PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
发明人： PURNHAGEN, Heiko , VILLEMOES, Lars , ENGDEGARD, Jonas , RÖDÉN, Jonas , KJÖRLING, Kristofer
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/008 , G10L19/0204 , G10L19/032 , G10L19/167 , G10L19/26 , H04S3/02 , H04S5/00 , H04S2400/01 , H04S2400/03
摘要： A multi-channel input signal having at least three original channels is represented by a parameter representation of the multi-channel signal. A first balance parameter (r1), a first coherence parameter, or a first inter-channel time difference between a first channel pair and a second bal-ance parameter (r2), or a second coherence parameter, or a second inter-channel time difference parameter between a second channel pair are calculated. This set of parameters is the parameter representation of the original signals. The first channel pair (102, 104) has two channels, which are different from two channels of a second channel pair (102, 104, 103). Furthermore, each channel of the two chan-nel pairs is one of the original channels, or a weighted combination of the original channels, and the first channel pair and the second channel pair include information on the three original channels. For multi-channel reconstruction purposes, the parameters are used in addition to down-mixing information to generate a selectable number of out-put channels in a scalable fashion.
摘要翻译：具有至少三个原始信道的多信道输入信号由多信道信号的参数表示来表示。第一平衡参数（r1），第一相干参数或第一通道对和第二平衡参数（r2）之间的第一通道间时间差或第二相干参数或第二通道间时间计算第二通道对之间的差参数。这组参数是原始信号的参数表示。第一信道对（102,104）具有与第二信道对（102,104,103）的两个信道不同的两个信道。此外，两个通道对的每个通道是原始通道之一或原始通道的加权组合，并且第一通道对和第二通道对包括关于三个原始通道的信息。对于多通道重建的目的，除了降混信息之外还使用参数以便以可缩放的方式生成可选数量的输出通道。

9. 发明申请

WO2005043511A1 AUDIO SIGNAL ENCODING OR DECODING 审中-公开
标题翻译：音频信号编码或解码
公开(公告)号：WO2005043511A1
公开(公告)日：2005-05-12
申请号：PCT/IB2004/052226
申请日：2004-10-28
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , CODING TECHNOLOGIES GMBH , VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
发明人： VILLEMOES, Lars, F. , EKSTRAND, Per , PURNHAGEN, Heiko , SCHUIJERS, Erik, G., P. , DE BONT, Fransiscus M., J.
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L21/038
摘要： Encoding an audio signal is provided wherein the audio signal includes a first audio channel and a second audio channel, the encoding comprising subband filtering each of the first audio channel and the second audio channel in a complex modulated filterbank to provide a first plurality of subband signals for the first audio channel and a second plurality of subband signals for the second audio channel, downsampling each of the subband signals to provide a first plurality of downsampled subband signals and a second plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, deriving spatial parameters from the sub-subband signals and from those downsampled subband signals that are not further subband filtered, and deriving a single channel audio signal comprising derived subband signals derived from the first plurality of downsampled subband signals and the second plurality of downsampled subband signals. Further, decoding is provided wherein an encoded audio signal comprising an encoded single channel audio signal and a set of spatial parameters is decoded by decoding the encoded single channel audio channel to obtain a plurality of downsampled subband signals, further subband filtering at least one of the downsampled subband signals in a further filterbank in order to provide a plurality of sub-subband signals, and deriving two audio channels from the spatial parameters, the sub-subband signals and those downsampled subband signals that are not further subband filtered.
摘要翻译：提供对音频信号的编码，其中音频信号包括第一音频通道和第二音频通道，该编码包括在复调制滤波器组中对第一音频通道和第二音频通道中的每一个进行子带滤波，以提供第一多个子带信号对于第一音频通道和用于第二音频通道的第二多个子带信号，对每个子带信号进行下采样以提供第一多个下采样子带信号和第二多个下采样子带信号，进一步子带滤波至少一个在另一个滤波器组中进行下采样的子带信号，以便提供多个子子带信号，从子子带信号和未进一步子带滤波的那些下采样子带信号导出空间参数，以及导出包括导出的从第一多个下采样子带信号导出的子带信号和第二多个下采样子带信号。此外，提供了解码，其中包括编码的单声道音频信号和一组空间参数的编码音频信号通过对编码的单声道音频声道进行解码以获得多个下采样的子带信号而被解码，进一步的子带滤波至少一个在另一滤波器组中进行下采样的子带信号，以便提供多个子子带信号，以及从空间参数，子子带信号和未进一步子带滤波的那些下采样子带信号导出两个音频信道。

10. 发明申请

WO2006048204A1 MULTI PARAMETRISATION BASED MULTI-CHANNEL RECONSTRUCTION 审中-公开
标题翻译：多参数多通道重构
公开(公告)号：WO2006048204A1
公开(公告)日：2006-05-11
申请号：PCT/EP2005/011587
申请日：2005-10-28
申请人： CODING TECHNOLOGIES AB , KONINKLIJKE PHILIPS ELECTRONICS N.V. , VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
发明人： VILLEMOES, Lars , KJÖRLING, Kristofer , PURNHAGEN, Heiko , RÖDEN, Jonas , BREEBAART, Jeroen , HOTHO, Gerard
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , G10L19/04 , H04S2420/03
摘要： A Multi-channel synthesiser for generating at least three output channels (110, 111, 112) using an input signal having at least one base channel, the base channel being derived from the original multi-channel signal (101, 102, 103), the input signal further including at least two different up-mixing parameters, and an up-mixer mode indication (1005) indicating, in a first state that a first up-mixing rule is to be performed, and, indicating, in a second state, that a different second up-mixing rule is to be performed, uses an up-mixer for up-mixing the at least one base channel using the at least two different up-mixing parameters based on the first or the second up-mixing rule in response to the up-mixer mode indication (1005) so that the at least three output channels (110, 111, 112) are obtained.
摘要翻译：一种多通道合成器，用于使用具有至少一个基本通道的输入信号来产生至少三个输出通道（110,111,112），所述基本通道从原始多通道信号（101,102,103）导出，所述输入信号还包括至少两个不同的上混参数，以及上混合模式指示（1005），在第一状态下指示要执行第一加混规则，并且以第二状态要执行不同的第二上调规则，使用上混合器，用于使用基于第一或第二上混合规则的至少两个不同的上混参数来上混合至少一个基本信道响应于上混频器模式指示（1005），使得获得至少三个输出通道（110,111,112）。

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