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1. 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。

2. 发明申请

WO2012025431A2 CONCEALMENT OF INTERMITTENT MONO RECEPTION OF FM STEREO RADIO RECEIVERS 审中-公开
标题翻译： FM立体声无线电接收机的间接单声道接收
公开(公告)号：WO2012025431A2
公开(公告)日：2012-03-01
申请号：PCT/EP2011/064084
申请日：2011-08-16
申请人： DOLBY INTERNATIONAL AB , SEHLSTROM, Leif , PURNHAGEN, Heiko , ENGDEGARD, Jonas
发明人： SEHLSTROM, Leif , PURNHAGEN, Heiko , ENGDEGARD, Jonas
IPC分类号： G10L19/00
CPC分类号： H04R5/00 , G10L19/005 , G10L19/008 , G10L21/0364 , H04B1/1676 , H04H40/81
摘要： The present invention relates to audio signal processing. In particular, it relates to a method and system for reliably concealing intermittent mono reception of FM stereo radio receivers. The system comprises a parametric stereo parameter estimation stage configured to determine a first parametric stereo parameter based on a first frame of the received two-channel audio signal. The system further comprises a concealment detection stage configured to determine an energy of a side signal within the first signal frame; determine a number of following successive signal frames during which the energy of the side signal drops from a value above the high threshold to a value below a low threshold; determine that the two-channel audio signal following the first signal frame is a forced mono signal if the number of successive signal frames is below a frame threshold; and determine the parametric stereo parameter based on the first parametric stereo parameter.
摘要翻译：本发明涉及音频信号处理。特别涉及用于可靠地隐藏FM立体声无线电接收机的间歇单声道接收的方法和系统。该系统包括参数立体声参数估计级，其被配置为基于所接收的双声道音频信号的第一帧来确定第一参数立体声参数。所述系统还包括隐藏检测级，被配置为确定所述第一信号帧内的侧信号的能量; 确定随后的连续信号帧的数量，在此期间，侧信号的能量从高于高阈值的值下降到低于低阈值的值; 如果连续信号帧的数量低于帧阈值，则确定跟随第一信号帧的双声道音频信号是强制单声道信号; 并根据第一参数立体声参数确定参数立体声参数。

3. 发明申请

WO2013186343A2 SMOOTH CONFIGURATION SWITCHING FOR MULTICHANNEL AUDIO 审中-公开
标题翻译：多通道音频的最佳配置切换
公开(公告)号：WO2013186343A2
公开(公告)日：2013-12-19
申请号：PCT/EP2013/062339
申请日：2013-06-14
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , SEHLSTROM, Leif , ROEDEN, Karl Jonas , KJOERLING, Kristofer , VILLEMOES, Lars
IPC分类号： G10L19/18
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A decoding system (100) reconstructs an n-channel audio signal on the basis of an input signal (A) representing the audio signal either by parametric coding or as n discretely coded channels. Parametric decoding proceeds on the basis of a core signal and mixing parameters (a) controlling a spatial synthesis stage (150), which is supplied with a downmix signal from a downmix stage (140). A selector (170) controls the components of the decoding system, in steady-state parametric and discrete decoding mode and transitions between these. The downmix stage realizes a projection on the downmix signal based on an n-channel signal, either an n-channel input signal or a core signal padded with neutral values. The downmix stage is active in each time frame in which the input signal represents the audio signal by parametric coding and in at least the first time frame after the last time frame in each episode of parametrically coded time frames.
摘要翻译：解码系统（100）根据表示音频信号的输入信号（A），通过参数编码或作为n个离散编码的声道来重建n声道音频信号。基于核心信号和混合参数（a）进行参数解码，（a）控制空间合成级（150），其被提供有来自下混级（140）的降混信号。选择器（170）以稳态参数和离散解码模式控制解码系统的组件，并在这些模式之间转换。下混合阶段基于n沟道信号（n沟道输入信号或填充有中性值的核心信号）实现对下混合信号的投影。下混合阶段在每个时间帧中是活动的，其中输入信号通过参数编码表示音频信号，并且至少在每个参数编码的时间帧的最后一个时间帧之后的第一时间帧中。

4. 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。

5. 发明申请

WO2015036350A1 AUDIO DECODING SYSTEM AND AUDIO ENCODING SYSTEM 审中-公开
标题翻译：音频解码系统和音频编码系统
公开(公告)号：WO2015036350A1
公开(公告)日：2015-03-19
申请号：PCT/EP2014/069041
申请日：2014-09-08
申请人： DOLBY INTERNATIONAL AB
发明人： VILLEMOES, Lars , SAMUELSSON, Leif Jonas , KJOERLING, Kristofer , PURNHAGEN, Heiko , SEHLSTROM, Leif
IPC分类号： G10L19/008
CPC分类号： G10L19/008
摘要： An audio decoding system (100) for processing a two-channel input signal (X) comprises a parametric mixing stage (110). The parametric mixing stage receives the two-channel input signal and a set of mixing parameters (P1), and outputs a two-channel output signal (Y1). The parametric mixing stage comprises a decorrelation stage (111) outputting a decorrelated signal (D1) based on the input signal. The parametric mixing stage further comprises a mixing matrix (112) receiving the input signal and the decorrelated signal, and forming a two-channel linear combination of channels from the input signal and the decorrelated signal. The mixing matrix outputs the linear combination as the two-channel output signal. Coefficients of the linear combination are controllable by the set of mixing parameters, and at least four mixing parameters of the set are independently assignable. In example embodiments, multiple parametric mixing stages are used to independently reconstruct additional channels encoded in the input signal.
摘要翻译：用于处理双通道输入信号（X）的音频解码系统（100）包括参数混合级（110）。参数混合级接收双通道输入信号和一组混合参数（P1），并输出双通道输出信号（Y1）。参数混合级包括基于输入信号输出解相关信号（D1）的去相关级（111）。参数混合阶段还包括接收输入信号和解相关信号的混合矩阵（112），以及从输入信号和解相关信号形成信道的双通道线性组合。混合矩阵输出线性组合作为双通道输出信号。线性组合的系数可以通过混合参数的集合来控制，并且该组的至少四个混合参数是独立可分配的。在示例实施例中，使用多个参数混合级来独立地重建在输入信号中编码的附加通道。

6. 发明申请

WO2014161992A1 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：WO2014161992A1
公开(公告)日：2014-10-09
申请号：PCT/EP2014/056852
申请日：2014-04-04
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , PURNHAGEN, Heiko , MUNDT, Harald , ROEDEN, Karl Jonas , SEHLSTROM, Leif
IPC分类号： G10L19/008
CPC分类号： G10L19/20 , G10L19/008 , G10L19/0212 , G10L19/167 , G10L25/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： The present disclosure provides methods, devices and computer program products for encoding and decoding a multi-channel audio signal based on an input signal. According to the disclosure, a hybrid approach of using both parametric stereo coding and discrete representation of the processed multi-channel 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多声道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处理的多声道音频信号的离散表示的混合方法，其可以提高针对某些比特率的编码和解码的音频的质量。

7. 发明申请

WO2013124446A1 AUDIO PROCESSING 审中-公开
标题翻译：音频处理
公开(公告)号：WO2013124446A1
公开(公告)日：2013-08-29
申请号：PCT/EP2013/053610
申请日：2013-02-22
申请人： DOLBY INTERNATIONAL AB
发明人： KJOERLING, Kristofer , PURNHAGEN, Heiko , ROEDEN, Karl Jonas , SEHLSTROM, Leif , VILLEMOES, Lars
IPC分类号： G10L19/008
CPC分类号： G10L19/008 , H04S2420/03
摘要： An audio processing system (100) for spatial synthesis comprises an upmix stage (110) receiving a decoded m-channel downmix signal (X) and outputting, based thereon, an n-channel upmix signal (Y), wherein 2 ≤ m 1 , d 2 ) obtained by cross mixing and non-linear processing of the downmix signal, and further comprises a first mixing matrix (130) receiving the downmix signal and the modified downmix signal, forming an n-channel linear combination of the downmix signal channels and modified downmix signal channels only and outputting this as the n-channel upmix signal. In an embodiment, the first mixing matrix accepts one or more mixing parameters (g, α 1 ,...) controlling at least one gain in the linear combination performed by the first mixing matrix. The gains are polynomials of degree ≤2.
摘要翻译：用于空间合成的音频处理系统（100）包括接收解码的m信道下混合信号（X）的上混级（110）并基于此输出n沟道上混合信号（Y），其中2 <= m < ñ。上混级包括下混修改处理器（120），其接收m声道下混信号并输出通过下混信号的交叉混合和非线性处理获得的修改的下混合信号（d1，d2），并且还包括第一接收下混合信号和修正的下混合信号的混合矩阵（130），仅形成降混信号通道和修正的下混信号通道的n通道线性组合，并将其输出为n通道上混信号。在一个实施例中，第一混合矩阵接受控制由第一混合矩阵执行的线性组合中的至少一个增益的一个或多个混合参数（g，α1，...）。增益是度<= 2的多项式。

8. 发明申请

WO2013045693A2 HIGH QUALITY DETECTION IN FM STEREO RADIO SIGNALS 审中-公开
标题翻译： FM立体声无线电信号的高质量检测
公开(公告)号：WO2013045693A2
公开(公告)日：2013-04-04
申请号：PCT/EP2012/069330
申请日：2012-10-01
申请人： DOLBY INTERNATIONAL AB
发明人： ENGDEGARD, Jonas , PURNHAGEN, Heiko , SEHLSTROM, Leif
IPC分类号： G10L25/69
CPC分类号： H04H40/45 , G10L19/008 , G10L25/69 , H04B1/1676
摘要： The present document relates to audio signal processing, in particular to an apparatus and a corresponding method for improving an audio signal of an FM stereo radio receiver. In particular, the present document relates to a method and system for reliably detecting the quality of a received FM stereo radio signal and for selecting an appropriate processing based on the detected quality. An apparatus (20) configured to estimate the quality of a received multi-channel FM radio signal is described. The received multi¬ channel FM radio signal is representable as a mid signal and a side signal, and the side signal is indicative of a difference between a left signal and a right signal. The apparatus (20) comprises a power determination unit configured to determine (101) a power of the mid signal, referred to as mid power, and a power of the side signal, referred to as side power; a ratio determination unit configured to determine (102) a ratio of the mid power and the side power, thereby yielding a mid-to-side ratio; and a quality determination unit configured to determine (105) a quality indicator of the received FM radio signal based at least on the mid-to-side ratio.
摘要翻译：本文件涉及音频信号处理，尤其涉及用于改进FM立体声无线电接收器的音频信号的装置和相应方法。特别地，本文件涉及用于可靠地检测所接收的FM立体声无线电信号的质量并且用于基于检测到的质量选择适当的处理的方法和系统。描述了被配置为估计所接收的多频道FM无线电信号的质量的装置（20）。收到的multi＆not; 信道FM无线电信号可表示为中间信号和侧信号，侧信号表示左信号和右信号之间的差异。所述装置（20）包括功率确定单元，所述功率确定单元被配置为确定（101）被称为中功率的中间信号的功率和被称为侧功率的侧信号的功率; 比率确定单元，被配置为确定（102）中等功率和副功率的比率，从而产生中等比率; 以及质量确定单元，被配置为至少基于所述中侧比确定（105）所接收的FM无线电信号的质量指标。

9. 发明申请

WO2013186344A2 SMOOTH CONFIGURATION SWITCHING FOR MULTICHANNEL AUDIO RENDERING BASED ON A VARIABLE NUMBER OF RECEIVED CHANNELS 审中-公开
标题翻译：基于可变数量的接收频道进行多通道音频渲染的最佳配置切换
公开(公告)号：WO2013186344A2
公开(公告)日：2013-12-19
申请号：PCT/EP2013/062340
申请日：2013-06-14
申请人： DOLBY INTERNATIONAL AB
发明人： PURNHAGEN, Heiko , SEHLSTROM, Leif , ROEDEN, Karl, Jonas , KJOERLING, Kristofer , VILLEMOES, Lars
IPC分类号： G10L19/18
CPC分类号： G10L19/008 , G10L19/0017 , G10L19/18 , H04S3/008 , H04S2400/03 , H04S2420/03
摘要： A decoding system reconstructs an n-channel audio signal on the basis of an input signal representing the audio signal, in different time frames, either by parametric coding or as n discretely coded channels. Parametric decoding uses a core signal and mixing parameters controlling a spatial synthesis stage, to which a downmix signal is supplied from a downmix stage. The downmix stage realizes a projection on the downmix signal based on an n- channel input signal, either a discretely coded signal or a core signal padded with neutral-valued channels. The padding may take place either on the decoding side (reduced parametric coding) or the encoding side. In an embodiment, an audio decoder (110) in the decoding system pads the core signal during an initial portion of each reduced parametrically coded time frame directly succeeding a discretely coded time frame and during a final portion of each reduced parametrically coded time frame directly preceding a discretely coded time frame.
摘要翻译：解码系统通过参数编码或作为n个离散编码的信道，在不同的时间帧中，基于表示音频信号的输入信号来重构n信道音频信号。参数解码使用核心信号和控制空间合成阶段的混合参数，下混合信号从下混合级提供给它。下混合阶段基于n-沟道输入信号，即离散编码信号或填充有中性信道的核心信号实现对下混信号的投影。填充可以在解码侧（缩减参数编码）或编码侧进行。在一个实施例中，解码系统中的音频解码器（110）在直接在离散编码的时间帧之后的每个缩减的参数编码时间帧的初始部分期间以及在直接前进的每个缩减的参数编码时间帧的最后部分期间，离散编码的时间帧。

10. 发明申请

WO2013173080A1 SYSTEM FOR MAINTAINING REVERSIBLE DYNAMIC RANGE CONTROL INFORMATION ASSOCIATED WITH PARAMETRIC AUDIO CODERS 审中-公开
标题翻译：维护与参数音频编码器相关的可反转动态范围控制信息的系统
公开(公告)号：WO2013173080A1
公开(公告)日：2013-11-21
申请号：PCT/US2013/039344
申请日：2013-05-02
申请人： DOLBY LABORATORIES LICENSING CORPORATION , DOLBY INTERNATIONAL AB
发明人： RIEDMILLER, Jeffrey , ROEDEN, Karl, J. , KJOERLING, Kristofer , PURNHAGEN, Heiko , MELKOTE, Vinay , SEHLSTROM, Leif
IPC分类号： G10L19/008 , G10L19/18 , H03G7/00 , H03G9/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/167 , G10L19/18
摘要： On the basis of a bitstream (P), an n-channel audio signal (X) is reconstructed by deriving an m-channel core signal (Y) and multichannel coding parameters (α) from the bitstream, where 1 ≤ m
摘要翻译：基于比特流（P），通过从比特流导出m信道核心信号（Y）和多信道编码参数（α）来重构n信道音频信号（X），其中1 <= m

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