公开(公告)号：US20110202354A1

公开(公告)日：2011-08-18

申请号：US13004385

申请日：2011-01-11

申请人： Bernhard Grill ,  Roch Lefebvre ,  Bruno Bessette ,  Jimmy Lapierre ,  Philippe Gournay ,  Redwan Salami ,  Stefan Bayer ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Ralf Geiger ,  Johannes Hilpert ,  Ulrich Kraemer ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Harald Popp ,  Nikolaus Rettelbach

发明人： Bernhard Grill ,  Roch Lefebvre ,  Bruno Bessette ,  Jimmy Lapierre ,  Philippe Gournay ,  Redwan Salami ,  Stefan Bayer ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Ralf Geiger ,  Johannes Hilpert ,  Ulrich Kraemer ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Harald Popp ,  Nikolaus Rettelbach

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0017 ,  G10L19/0212 ,  G10L19/173 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder has a first information sink oriented encoding branch such as a spectral domain encoding branch, a second information source or SNR oriented encoding branch such as an LPC-domain encoding branch, and a switch for switching between the first encoding branch and the second encoding branch, wherein the second encoding branch has a converter into a specific domain different from the spectral domain such as an LPC analysis stage generating an excitation signal, and wherein the second encoding branch furthermore has a specific domain coding branch such as LPC domain processing branch, and a specific spectral domain coding branch such as LPC spectral domain processing branch, and an additional switch for switching between the specific domain coding branch and the specific spectral domain coding branch. An audio decoder has a first domain decoder such as a spectral domain decoding branch, a second domain decoder such as an LPC domain decoding branch for decoding a signal such as an excitation signal in the second domain, and a third domain decoder such as an LPC-spectral decoder branch and two cascaded switches for switching between the decoders.

摘要翻译： 音频编码器具有第一信息汇集编码分支，例如频域编码分支，第二信息源或诸如LPC域编码分支的面向SNR的编码分支，以及用于在第一编码分支和第二编码分支之间进行切换的开关 编码分支，其中所述第二编码分支具有转换器到不同于频域的特定领域，例如产生激励信号的LPC分析阶段，并且其中所述第二编码分支还具有特定的域编码分支，诸如LPC域处理分支 ，以及诸如LPC频域处理分支的特定频域编码分支，以及用于在特定编码分支和特定频域编码分支之间切换的附加开关。 音频解码器具有第一域解码器，例如频域解码分支，第二域解码器，例如LPC域解码分支，用于解码诸如第二域中的激励信号的信号，以及第三域解码器，例如LPC 光谱解码器分支和两个级联开关，用于在解码器之间切换。

公开(公告)号：US20090003612A1

公开(公告)日：2009-01-01

申请号：US12206778

申请日：2008-09-09

申请人： Juergen Herre ,  Johannes Hilpert ,  Stefan Geyersberger ,  Andreas Holzer ,  Claus Spenger

发明人： Juergen Herre ,  Johannes Hilpert ,  Stefan Geyersberger ,  Andreas Holzer ,  Claus Spenger

IPC分类号： H04R5/00

CPC分类号： H04S3/02 ,  G10L19/008 ,  G10L19/032 ,  H04S3/008 ,  H04S2400/03 ,  H04S2420/03

摘要： In processing a multi-channel audio signal having at least three original channels, a first downmix channel and a second downmix channel are provided, which are derived from the original channels. For a selected original channel of the original channels, channel side information are calculated such that a downmix channel or a combined downmix channel including the first and the second downmix channels, when weighted using the channel side information, results in an approximation of the selected original channel. The channel side information and the first and second downmix channels form output data to be transmitted to a decoder, which, in case of a low level decoder only decodes the first and second downmix channels or, in case of a high level decoder provides a full multi-channel audio signal based on the downmix channels and the channel side information. Since the channel side information only occupy a low number of bits, and since the decoder does not use dematrixing, an efficient and high quality multi-channel extension for stereo players and enhanced multi-channel players is obtained.

摘要翻译： 在处理具有至少三个原始信道的多声道音频信号时，提供从原始信道导出的第一下混通道和第二下混通道。 对于原始频道的所选择的原始频道，计算频道侧信息，使得当使用频道侧信息加权时，包括第一和第二下混频道的下混频道或组合缩混频道导致所选原稿的近似 渠道。 信道侧信息以及第一和第二下混频道形成要发送到解码器的输出数据，其在低电平解码器的情况下仅解码第一和第二下混通道，或者在高电平解码器提供满 基于下混频道的多声道音频信号和频道侧信息。 由于信道侧信息仅占用少量的比特，并且由于解码器不使用解矩阵，因此可以获得用于立体声播放器和增强型多声道播放器的有效且高质量的多声道扩展。

公开(公告)号：US08386268B2

公开(公告)日：2013-02-26

申请号：US13107687

申请日：2011-05-13

申请人： Frederik Nagel ,  Markus Multrus ,  Jeremie Lecomte ,  Stefan Bayer ,  Guillaume Fuchs ,  Johannes Hilpert ,  Julien Robilliard

发明人： Frederik Nagel ,  Markus Multrus ,  Jeremie Lecomte ,  Stefan Bayer ,  Guillaume Fuchs ,  Johannes Hilpert ,  Julien Robilliard

IPC分类号： G10L19/00

CPC分类号： G10L19/24 ,  G10L21/038

摘要： An apparatus for generating a synthesis audio signal using a patching control signal has a first converter, a spectral domain patch generator, a high frequency reconstruction manipulator and a combiner. The first converter is configured for converting a time portion of an audio signal into a spectral representation. The spectral domain patch generator is configured for performing a plurality of different spectral domain patching algorithms, wherein each patching algorithm generates a modified spectral representation having spectral components in an upper frequency band derived from corresponding spectral components in a core frequency band of the audio signal. The spectral domain patch generator is furthermore configured to select a first spectral domain patching algorithm from the plurality of patching algorithms for a first time portion and a second spectral domain patching algorithm from the plurality of patching algorithm for a second different time portion in accordance with the patching control signal to obtain the modified spectral representation.

摘要翻译： 使用补丁控制信号产生合成音频信号的装置具有第一转换器，频域补丁发生器，高频重建操纵器和组合器。 第一转换器被配置为将音频信号的时间部分转换为频谱表示。 频域补丁生成器被配置用于执行多个不同的频域修补算法，其中每个修补算法生成具有从音频信号的核心频带中的相应频谱分量导出的上频带中的频谱分量的修改频谱表示。 频域补丁生成器还被配置为根据来自第一时间部分的多个修补算法和来自用于第二不同时间部分的多个修补算法的第二频域修补算法来选择第一频域修补算法 修补控制信号以获得修改的光谱表示。

公开(公告)号：US20120177204A1

公开(公告)日：2012-07-12

申请号：US13335047

申请日：2011-12-22

申请人： Oliver Hellmuth ,  Cornelia Falch ,  Juergen Herre ,  Johannes Hilpert ,  Leon Terentiv ,  Falko Ridderbusch

发明人： Oliver Hellmuth ,  Cornelia Falch ,  Juergen Herre ,  Johannes Hilpert ,  Leon Terentiv ,  Falko Ridderbusch

IPC分类号： H04R5/00

CPC分类号： G10L19/20 ,  G10H1/361 ,  G10H2210/301 ,  G10L19/008 ,  H04S7/30 ,  H04S2400/11 ,  H04S2420/07

摘要： An audio signal decoder for providing an upmix signal representation in dependence on a downmix signal representation and an object-related parametric information includes an object separator configured to decompose the downmix signal representation, to provide a first audio information describing a first set of one or more audio objects of a first audio object type and a second audio information describing a second set of one or more audio objects of a second audio object type, in dependence on the downmix signal representation and using at least a part of the object-related parametric information.

摘要翻译： 音频信号解码器，用于根据降混信号表示和对象相关参数信息提供上混合信号表示，包括被配置成分解下混合信号表示的对象分离器，以提供描述第一组一个或多个 第一音频对象类型的音频对象和描述第二音频对象类型的一个或多个音频对象的第二组的第二音频信息，其依赖于下混合信号表示并使用至少一部分与对象相关的参数信息 。

公开(公告)号：US08155971B2

公开(公告)日：2012-04-10

申请号：US12253442

申请日：2008-10-17

申请人： Oliver Hellmuth ,  Johannes Hilpert ,  Leonid Terentiev ,  Cornelia Falch ,  Andreas Hoelzer ,  Juergen Herre

发明人： Oliver Hellmuth ,  Johannes Hilpert ,  Leonid Terentiev ,  Cornelia Falch ,  Andreas Hoelzer ,  Juergen Herre

IPC分类号： G10L19/00

CPC分类号： G10L19/04 ,  G10L19/008 ,  G10L19/20 ,  H04S3/002 ,  H04S2420/03 ,  H04S2420/07

摘要： A method for decoding a multi-audio-object signal having audio signals of first and second types encoded therein, the multi-audio-object signal having a downmix signal and side information having level information of the audio signals of the first and second types in a first predetermined time/frequency resolution, the method including computing a prediction coefficient matrix C based on the level information; and up-mixing the downmix signal based on the prediction coefficients to obtain a first and/or a second up-mix audio signal approximating the audio signals of the first and second types, respectively, wherein up-mixing yields the first and/or second up-mix signals S1 and S2 from the downmix signal d according to a computation representable by ( S 1 S 2 ) = D - 1 ⁢ { ( 1 C ) ⁢ d + H } , with “1” denoting—depending on the number of channels of d—a scalar, or an identity matrix, and D−1 being a matrix uniquely determined by a downmix prescription according to which the audio signals of the first and second types are downmixed into the downmix signal, and which is also included by the side information, and H being a term independent from d.

摘要翻译： 一种对其中编码有第一和第二类型的音频信号的多音频对象信号进行解码的方法，具有降混信号的多音频对象信号和具有第一和第二类型的音频信号的电平信息的侧信息 第一预定时间/频率分辨率，所述方法包括基于所述电平信息来计算预测系数矩阵C; 以及基于所述预测系数对所述下混合信号进行加混，以获得分别接近所述第一类型和第二类型的音频信号的第一和/或第二混合音频信号，其中上混合产生所述第一和/ 根据由（S 1 S 2）= D-1 {（1 C）d + H）表示的计算，来自下混合信号d的混合信号S1和S2，其中“1”表示取决于数字 的d-a标量或单位矩阵的信道，D-1是由缩混处方唯一确定的矩阵，根据该处理，第一和第二类型的音频信号被混合到下混合信号中，并且还包括 通过侧面信息，H是独立于d的术语。

公开(公告)号：US08037114B2

公开(公告)日：2011-10-11

申请号：US11762690

申请日：2007-06-13

申请人： Marc Gayer ,  Manfred Lutzky ,  Markus Lohwasser ,  Sascha Disch ,  Johannes Hilpert ,  Stefan Geyersberger ,  Bernhard Grill

发明人： Marc Gayer ,  Manfred Lutzky ,  Markus Lohwasser ,  Sascha Disch ,  Johannes Hilpert ,  Stefan Geyersberger ,  Bernhard Grill

IPC分类号： G06F15/00

CPC分类号： G06F7/544 ,  G06F7/49936 ,  G06F7/49942 ,  G06F7/5443 ,  G10L19/02

摘要： In the transition into the logarithmic range, not the entire bit width of the result linearly dependent upon the square of the value must be considered. Rather, it is possible to scale the result of a value with x bits such that a representation with less than x bits of the result is sufficient to receive the logarithmic representation based thereon. The effect of the scaling factor on the resulting logarithmic representation may be compensated for by adding or subtracting a correction value received by the logarithm function applied to the scaling factor to or from the scaled logarithmic representation without any loss of dynamics. This way, a method and an apparatus for creating a representation of a result linearly dependent upon a square of a value are provided so that the calculation is simple and/or possible with little hardware expenditure.

摘要翻译： 在向对数范围的转换中，必须考虑线性依赖于该值平方的结果的整数位宽度。 相反，可以用x比特来缩放值的结果，使得具有小于x位的结果的表示足以基于此来接收对数表示。 缩放因子对所得到的对数表示的影响可以通过将由应用于比例因子的对数函数接收的校正值加到或从缩放的对数表示中减去而没有任何动态损失来补偿。 这样，提供了一种用于创建线性表示的方法和装置，该结果线性地取决于值的平方，使得在少量硬件消耗的情况下计算是简单的和/或可能的。

公开(公告)号：US20110211702A1

公开(公告)日：2011-09-01

申请号：US13015335

申请日：2011-01-27

申请人： Harald Mundt ,  Bernhard Neugebauer ,  Johannes Hilpert ,  Andreas Silzle ,  Jan Plogsties

发明人： Harald Mundt ,  Bernhard Neugebauer ,  Johannes Hilpert ,  Andreas Silzle ,  Jan Plogsties

IPC分类号： H04R5/00

CPC分类号： H04S3/004 ,  H04S7/30 ,  H04S2400/01 ,  H04S2420/01

摘要： A device for generating a binaural signal based on a multi-channel signal representing a plurality of channels and intended for reproduction by a speaker configuration having a virtual sound source position associated to each channel, is described. It includes a correlation reducer for differently processing, and thereby reducing a correlation between, at least one of a left and a right channel of the plurality of channels, a front and a rear channel of the plurality of channels, and a center and a non-center channel of the plurality of channels, in order to obtain an inter-similarity reduced set of channels; a plurality of directional filters, a first mixer for mixing outputs of the directional filters modeling the acoustic transmission to the first ear canal of the listener, and a second mixer for mixing outputs of the directional filters modeling the acoustic transmission to the second ear canal of the listener. According to another aspect, a center level reduction for forming the downmix for a room processor is performed. According to even another aspect, an inter-similarity decreasing set of head-related transfer functions is formed.

摘要翻译： 描述了一种用于基于表示多个信道并且由具有与每个信道相关联的虚拟声源位置的扬声器配置再现的多声道信号产生双耳信号的装置。 它包括用于不同处理的相关减法器，从而减少多个通道中的左通道和右通道中的至少一个，多个通道的前通道和后通道之间的相关性， 所述多个信道的中心信道，以便获得相互相似性减小的信道集合; 多个定向滤波器，用于混合将声学传播建模到收听者的第一耳道的方向滤波器的输出的第一混合器和用于混合将声学传播建模到第二耳道的方向滤波器的输出的第二混合器， 听众。 根据另一方面，执行用于形成室内处理器的下混合的中心水平降低。 根据另一方面，形成头相关传递函数的相互相似性减小集合。

公开(公告)号：US20110200198A1

公开(公告)日：2011-08-18

申请号：US13004453

申请日：2011-01-11

申请人： Bernhard Grill ,  Stefan Bayer ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Ralf Geiger ,  Johannes Hilpert ,  Ulrich Kraemer ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Harald Popp ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Sascha Disch ,  Juergen Herre ,  Yoshikazu Yokotani ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

发明人： Bernhard Grill ,  Stefan Bayer ,  Guillaume Fuchs ,  Stefan Geyersberger ,  Ralf Geiger ,  Johannes Hilpert ,  Ulrich Kraemer ,  Jeremie Lecomte ,  Markus Multrus ,  Max Neuendorf ,  Harald Popp ,  Nikolaus Rettelbach ,  Frederik Nagel ,  Sascha Disch ,  Juergen Herre ,  Yoshikazu Yokotani ,  Stefan Wabnik ,  Gerald Schuller ,  Jens Hirschfeld

IPC分类号： G10L19/14 ,  G10L21/00

CPC分类号： G10L19/173 ,  G10L19/0017 ,  G10L19/008 ,  G10L19/0212 ,  G10L19/18 ,  G10L2019/0008

摘要： An audio encoder has a common preprocessing stage, an information sink based encoding branch such as spectral domain encoding branch, a information source based encoding branch such as an LPC-domain encoding branch and a switch for switching between these branches at inputs into these branches or outputs of these branches controlled by a decision stage. An audio decoder has a spectral domain decoding branch, an LPC-domain decoding branch, one or more switches for switching between the branches and a common post-processing stage for post-processing a time-domain audio signal for obtaining a post-processed audio signal.

摘要翻译： 音频编码器具有通用的预处理级，诸如频域编码分支的基于信息宿的编码分支，诸如LPC域编码分支的基于信息源的编码分支以及用于在这些分支的输入处切换这些分支之间的切换，或 这些分支的输出由决策阶段控制。 音频解码器具有频域解码分支，LPC域解码分支，用于在分支之间切换的一个或多个开关和用于后处理时域音频信号以用于获得后处理音频的公共后处理级 信号。

公开(公告)号：US20070129940A1

公开(公告)日：2007-06-07

申请号：US11469418

申请日：2006-08-31

申请人： Michael Schug ,  Johannes Hilpert ,  Stefan Geyersberger ,  Max Neuendorf

发明人： Michael Schug ,  Johannes Hilpert ,  Stefan Geyersberger ,  Max Neuendorf

IPC分类号： G10L19/14

CPC分类号： G10L19/025 ,  G10L19/002

摘要： For determining an estimate of a need for information units for encoding a signal, a measure for the distribution of the energy in the frequency band is taken into account in addition to the admissible interference for a frequency band and an energy of the frequency band. With this, a better estimate of the need for information units is obtained, so that coding can be done more efficiently and more accurately.

摘要翻译： 为了确定对信号进行编码的信息单元的需求的估计，除了对于频带的容许干扰和频带的能量之外，还考虑了频带中的能量分布的度量。 因此，获得对信息单元的更好的估计，使得可以更有效和更准确地进行编码。

公开(公告)号：US06826525B2

公开(公告)日：2004-11-30

申请号：US10183139

申请日：2002-06-25

申请人： Johannes Hilpert ,  Jürgen Herre ,  Bernhard Grill ,  Rainer Buchta ,  Karlheinz Brandenburg ,  Heinz Gerhäuser

发明人： Johannes Hilpert ,  Jürgen Herre ,  Bernhard Grill ,  Rainer Buchta ,  Karlheinz Brandenburg ,  Heinz Gerhäuser

IPC分类号： G10L1900

CPC分类号： H04B1/665

摘要： A method for detecting a transient in a discrete-time audio signal is performed completely in the time domain and includes the step of segmenting the discrete-time audio signal so as to generate consecutive segments of the same length with unfiltered discrete-time audio signals xs(T−1). The discrete-time audio signal in a current segment is subsequently filtered. Then either the energy of the filtered discrete-time audio signal in the current segment can be compared with the energy of the filtered discrete-time audio signal in a preceding segment or a current relationship between the energy of the filtered discrete-time audio signal in the current segment and the energy of the unfiltered discrete-time audio signal in the current segment can be formed and this current relationship compared with a preceding corresponding relationship. On the basis of the one and/or the other of these comparisons it is detected whether a transient is present in the discrete-time audio signal.

摘要翻译： 用于检测离散时间音频信号中的瞬态的方法在时域中完全执行，并且包括分段离散时间音频信号以便生成具有未滤波的离散时间音频信号xs的相同长度的连续片段的步骤 （T-1）。 随后过滤当前片段中的离散时间音频信号。 然后可以将当前段中滤波的离散时间音频信号的能量与前一段中滤波的离散时间音频信号的能量或滤波后的离散时间音频信号的能量之间的当前关系进行比较 可以形成当前段的当前段和未过滤离散时间音频信号的能量，并将该当前关系与先前的对应关系进行比较。 基于这些比较中的一个和/或另一个，检测离散时间音频信号中是否存在瞬态。