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41. 发明申请

WO2014161993A1 STEREO AUDIO ENCODER AND DECODER 审中-公开
标题翻译：立体声音频编码器和解码器
公开(公告)号：WO2014161993A1
公开(公告)日：2014-10-09
申请号：PCT/EP2014/056854
申请日：2014-04-04
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , KJOERLING, Kristofer
IPC分类号： G10L19/02 , G10L19/008
CPC分类号： G10L19/06 , G10L19/008 , G10L19/02 , G10L19/0204 , G10L19/0212 , G10L19/167 , G10L19/265 , G10L25/06 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： The present disclosure provides methods, devices and computer program products for encoding and decoding a stereo audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and a discrete representation of the stereo audio signal is used which may improve the quality of the encoded and decoded audio for certain bitrates.
摘要翻译：本公开提供了用于基于输入信号对立体声音频信号进行编码和解码的方法，设备和计算机程序产品。根据本公开，使用使用参数立体声编码和立体声音频信号的离散表示的混合方法，其可以提高某些比特率的编码和解码的音频的质量。

42. 发明申请

WO2014161990A1 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：WO2014161990A1
公开(公告)日：2014-10-09
申请号：PCT/EP2014/056848
申请日：2014-04-04
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , KJOERLING, Kristofer , GROESCHEL, Alexander , POPP, Jens , ROEDEN, Karl Jonas
IPC分类号： G10L19/16 , H04N21/439 , H04N21/2368 , G10L21/055
CPC分类号： G10L21/055 , G10L19/022 , G10L19/167 , G10L19/22 , H04N21/2368 , H04N21/4302 , H04N21/4398
摘要： An audio processing system (100) accepts an audio bitstream having one of a plurality of predefined audio frame rates. The system comprises a front-end component (110), which receives a variable number of quantized spectral components, corresponding to one audio frame in any of the predefined audio frame rates, and performs an inverse quantization according to predetermined, frequency-dependent quantization levels. The front-end component may be agnostic of the audio frame rate. The audio processing system further comprises a frequency-domain processing stage (120) and a sample rate converter (130), which provide a reconstructed audio signal sampled at a target sampling frequency independent of the audio frame rate. By its frame-rate adaptability, the system can be configured to operate frame-synchronously in parallel with a video processing system that accepts plural video frame rates.
摘要翻译：音频处理系统（100）接受具有多个预定音频帧速率之一的音频比特流。该系统包括前端组件（110），其接收对应于任何预定音频帧速率中的一个音频帧的可变数量的量化频谱分量，并且根据预定的频率相关量化级别执行逆量化。前端组件可能与音频帧速率无关。音频处理系统还包括频域处理级（120）和采样率转换器（130），其提供以与音频帧速率无关的目标采样频率采样的重构音频信号。通过其帧率适应性，该系统可以被配置为与接受多个视频帧速率的视频处理系统并行地同步操作。

43. 发明申请

WO2013045691A1 PREDICTION-BASED FM STEREO RADIO NOISE REDUCTION 审中-公开
标题翻译：基于预测的FM立体声无线电噪声减少
公开(公告)号：WO2013045691A1
公开(公告)日：2013-04-04
申请号：PCT/EP2012/069323
申请日：2012-10-01
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , SEHLSTROM, Leif , ENGDEGARD, Jonas
IPC分类号： H04B1/16 , G10L19/008
CPC分类号： H04B1/10 , G10L19/005 , G10L19/008 , G10L21/0224 , G10L21/0264 , H04B1/1676
摘要： The present document relates to audio signal processing, in particular to an apparatus and a corresponding method for improving the audio signal of an FM stereo radio receiver. In particular, the present document relates to a method and system for reducing the noise of a received FM stereo radio signal. An apparatus (2) configured to reduce noise of a received multi-channel FM radio signal is described, wherein the received multi-channel FM radio signal is representable as a received mid signal and a received side signal. The apparatus (2) comprises a parameter determination unit (77) configured to determine one or more parameters indicative of a correlation and/or decorrelation between the received mid signal and the received side signal; and a noise reduction unit (79) configured to generate a noise-reduced side signal from the received mid signal and not from the received side signal using the one or more parameters.
摘要翻译：本文件涉及音频信号处理，具体涉及用于改进FM立体声无线电接收机的音频信号的装置和相应的方法。特别地，本文件涉及用于减少接收的FM立体声无线电信号的噪声的方法和系统。描述了被配置为降低接收的多频道FM无线电信号的噪声的装置（2），其中所接收的多频道FM无线电信号可被表示为接收的中间信号和接收侧信号。所述装置（2）包括参数确定单元（77），其被配置为确定指示所接收的中间信号和所接收的侧信号之间的相关性和/或去相关性的一个或多个参数; 以及噪声降低单元（79），被配置为使用所述一个或多个参数从所接收的中间信号而不是从所接收的侧信号产生噪声降低侧信号。

44. 发明申请

WO2012025429A1 REDUCTION OF SPURIOUS UNCORRELATION IN FM RADIO NOISE 审中-公开
标题翻译：减少FM无线电噪声中的不寻常的不符合
公开(公告)号：WO2012025429A1
公开(公告)日：2012-03-01
申请号：PCT/EP2011/064077
申请日：2011-08-16
申请人： DOLBY INTERNATIONAL AB , ENGDEGARD, Jonas , PURNHAGEN, Heiko , SEHLSTROM, Leif
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , SEHLSTROM, Leif
IPC分类号： H04B1/16 , G10L19/00 , H04S1/00
CPC分类号： H04R5/04 , G10L19/008 , H04B1/1676 , H04S1/007
摘要： The document relates to audio signal processing, in particular to a system and a corresponding method for improving an audio signal of an FM stereo radio receiver, in this context, one aspect relates to the estimation of noise in a received side signal and the compensation of such noise in parametric stereo parameters. A system for generating a parametric stereo parameter from a two-channel audio signal is described. The two-channel audio signal is presentable as a mid signal and side signal representative of a corresponding left and right audio signal. The system comprises a noise estimation stage configured to determine an impact factor characteristic for the noise of the side signal; and a parametric stereo parameter estimation stage configured to determine the parametric stereo parameter; wherein the determining is based on the two-channel audio signal and the impact factor.
摘要翻译：本文件涉及音频信号处理，具体涉及用于改进FM立体声无线电接收机的音频信号的系统和相应方法，在本上下文中，一个方面涉及接收侧信号中的噪声估计和这样的噪声参数立体声参数。描述了一种用于从双声道音频信号产生参数立体声参数的系统。双声道音频信号可以作为表示相应的左和右音频信号的中间信号和侧面信号呈现。该系统包括噪声估计级，其被配置为确定侧信号的噪声的影响因子特性; 以及被配置为确定所述参数立体声参数的参数立体声参数估计级; 其中所述确定基于所述双声道音频信号和所述影响因子。

45. 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。

46. 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。

47. 发明申请

WO2023039096A1 SYSTEMS AND METHODS FOR HEADPHONE RENDERING MODE-PRESERVING SPATIAL CODING 审中-公开
公开(公告)号：WO2023039096A1
公开(公告)日：2023-03-16
申请号：PCT/US2022/042949
申请日：2022-09-08
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： YANG, Ziyu , LU, Lie , PURNHAGEN, Heiko , STODDARD, Jeremy Grant , BREEBAART, Dirk Jeroen
IPC分类号： H04S7/00
摘要： Systems and methods for preserving headphone rendering mode (HRM) in object clustering are described. In an embodiment, an object-based audio data processing system includes a processor configured to receive a plurality of audio objects, wherein an audio object of the plurality of audio objects is associated with respective object metadata that indicates respective spatial position information and an HRM; determine a plurality of cluster positions by applying an extended hybrid distance metric to a spatial coding algorithm to calculate a partial loudness for each of the audio objects; render the audio objects to the cluster positions to form a plurality of clusters by applying the extended hybrid distance metric to the spatial coding algorithm to calculate object-to-cluster gains; and transmit the clusters to a spatial reproduction system.

48. 发明申请

WO2021252795A2 PERCEPTUAL OPTIMIZATION OF MAGNITUDE AND PHASE FOR TIME-FREQUENCY AND SOFTMASK SOURCE SEPARATION SYSTEMS 审中-公开
公开(公告)号：WO2021252795A2
公开(公告)日：2021-12-16
申请号：PCT/US2021/036866
申请日：2021-06-10
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： MASTER, Aaron Steven , LU, Lie , PURNHAGEN, Heiko
IPC分类号： G10L21/0272 , G10L25/18
摘要： A method comprises: obtaining softmask values for frequency bins of time-frequency tiles representing an audio signal; reducing, or expanding and limiting, the softmask values; and applying the reduced, or expanded and limited, softmask values to the frequency bins to create a time-frequency representation of an estimated target source. An alternative method comprises, for each time-frequency tile: obtaining softmask values; applying the softmask values to the frequency bins to create a time-frequency domain representation of an estimated target source; obtaining a panning parameter and a source concentration estimates for the target source; determining, using the panning parameter estimate and the softmask values, a magnitude for the time-frequency representation of the estimated target source; determining, using the panning parameter estimate and the source phase concentration estimate, a phase for the time-frequency representation of the estimated target source; and combining the magnitude and the phase.

49. 发明申请

WO2017035281A2 AUDIO ENCODING AND DECODING USING PRESENTATION TRANSFORM PARAMETERS 审中-公开
标题翻译：使用演示变换参数进行音频编码和解码
公开(公告)号：WO2017035281A2
公开(公告)日：2017-03-02
申请号：PCT/US2016/048497
申请日：2016-08-24
申请人： DOLBY INTERNATIONAL AB , DOLBY LABORATORIES LICENSING CORPORATION
发明人： BREEBAART, Dirk J. , COOPER, David M. , SAMUELSSON, Leif J. , KOPPENS, Jeroen , WILSON, Rhonda J. , PURNHAGEN, Heiko , GROESCHEL, Alexander
IPC分类号： H04S1/00
CPC分类号： H04S3/008 , G10L19/008 , H04S1/002 , H04S1/007 , H04S3/004 , H04S7/306 , H04S2400/01 , H04S2400/03 , H04S2400/11 , H04S2420/01 , H04S2420/03
摘要： A method for encoding an input audio stream including the steps of obtaining a first playback stream presentation of the input audio stream intended for reproduction on a first audio reproduction system, obtaining a second playback stream presentation of the input audio stream intended for reproduction on a second audio reproduction system, determining a set of transform parameters suitable for transforming an intermediate playback stream presentation to an approximation of the second playback stream presentation, wherein the transform parameters are determined by minimization of a measure of a difference between the approximation of the second playback stream presentation and the second playback stream presentation, and encoding the first playback stream presentation and the set of transform parameters for transmission to a decoder.
摘要翻译：一种用于对输入音频流进行编码的方法，包括以下步骤：在第一音频再现系统上获得用于再现的输入音频流的第一重放流呈现步骤，在第二音频再现系统中获得用于再现的输入音频流的第二播放流呈现音频再现系统，确定适合于将中间回放流呈现变换为第二重放流呈现的近似的一组变换参数，其中通过最小化第二重放流的近似之间的差的度量来确定变换参数呈现和第二播放流呈现，以及对第一重放流呈现和变换参数集合进行编码以便传输到解码器。

50. 发明申请

WO2016162283A1 AUDIO CODING WITH RANGE EXTENSION 审中-公开
标题翻译：音频编码与范围扩展
公开(公告)号：WO2016162283A1
公开(公告)日：2016-10-13
申请号：PCT/EP2016/057232
申请日：2016-04-01
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , EKSTRAND, Per , MUNDT, Harald , PEICHL, Klaus
IPC分类号： G10L19/035 , G10L21/0316
CPC分类号： G10L19/035 , G10L19/0204 , G10L21/0316 , G10L2019/0002 , G10L2019/0004
摘要： Disclosed are some examples of systems, apparatus, methods and computer program products implementing techniques for extending the range of a set of decoded parameter values for a sequence of frequency bands in an identifiable time frame of an audio signal. In some implementations, the parameter values vary in relation to a sequence of time frames of the audio signal and in relation to a sequence of frequency bands in each time frame. In some implementations, it is determined that a decoded value corresponds to a minimum of a first range of values of a first coding protocol of a set of coding protocols. The determined value is modified to be below the minimum of the first range of values to produce an extended value. A modified set of decoded values including one or more extended values can thus be provided.
摘要翻译：公开了一些系统，装置，方法和计算机程序产品的一些示例，其实现用于扩展音频信号的可识别时间帧中的频带序列的一组解码参数值的范围的技术。在一些实施方式中，参数值相对于音频信号的时间序列序列和每个时间帧中的频带序列而变化。在一些实现中，确定解码的值对应于一组编码协议的第一编码协议的值的第一范围的最小值。确定的值被修改为低于第一范围值的最小值以产生扩展值。因此可以提供包括一个或多个扩展值的经修改的解码值集合。

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