公开(公告)号：US08929558B2

公开(公告)日：2015-01-06

申请号：US13394799

申请日：2010-09-07

Applicant: Jonas Engdegard ,  Heiko Purnhagen ,  Karl Jonas Roeden

Inventor： Jonas Engdegard ,  Heiko Purnhagen ,  Karl Jonas Roeden

IPC: H04R5/00 ,  H04H40/54 ,  H04H40/81 ,  G10L19/00 ,  H04S1/00 ,  G10L19/008 ,  H04H40/45 ,  H04H40/72 ,  H04S5/00

CPC classification number: H04S3/00 ,  G10L19/008 ,  H04H40/45 ,  H04H40/72 ,  H04H40/81 ,  H04S1/00 ,  H04S1/007 ,  H04S5/00 ,  H04S2420/03

Abstract: The invention relates to an apparatus for improving a stereo audio signal of an FM stereo radio receiver. The apparatus comprises a parametric stereo (PS) parameter estimation stage. The parameter estimation stage is configured to determine one or more parametric stereo parameters based on the stereo audio signal in a frequency-variant or frequency-invariant manner. Preferably, these PS parameters are time- and frequency-variant. Moreover, the apparatus comprises an upmix stage. The upmix stage is configured to generate the improved stereo signal based on a first audio signal and the one or more parametric stereo parameters. The first audio signal is obtained from the stereo audio signal, e.g. by a downmix operation in a downmix stage. The PS parameter estimation stage may be part of a PS encoder. The upmix stage may be part of a PS decoder.

Abstract translation: 本发明涉及一种用于改进FM立体声无线电接收机的立体声音频信号的装置。 该装置包括参数立体声（PS）参数估计级。 参数估计级被配置为基于立体声音频信号以频率变化或频率不变的方式确定一个或多个参数立体声参数。 优选地，这些PS参数是时间和频率变化的。 此外，该装置包括上混级。 上混级被配置为基于第一音频信号和一个或多个参数立体声参数来生成改进的立体声信号。 第一音频信号是从立体声音频信号获得的。 通过下混合阶段的下混合操作。 PS参数估计阶段可以是PS编码器的一部分。 上混级可以是PS解码器的一部分。

公开(公告)号：US08693696B2

公开(公告)日：2014-04-08

申请号：US12872507

申请日：2010-08-31

Applicant: Heiko Purnhagen ,  Lars Villemoes ,  Jonas Engdegard ,  Jonas Roeden ,  Kristofer Kjoerling

Inventor： Heiko Purnhagen ,  Lars Villemoes ,  Jonas Engdegard ,  Jonas Roeden ,  Kristofer Kjoerling

IPC: H04R5/00

CPC classification number: H04R5/00 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/032 ,  G10L19/167 ,  G10L19/26 ,  H04S3/02 ,  H04S5/00 ,  H04S2400/01 ,  H04S2400/03

Abstract: A parameter representation of a multi-channel signal having several original channels includes a parameter set, which, when used together with at least one down-mix channel allows a multi-channel reconstruction. An additional level parameter is calculated such that an energy of the at least one downmix channel weighted by the level parameter is equal to a sum of energies of the original channels. The additional level parameter is transmitted to a multi-channel reconstructor together with the parameter set or together with a down-mix channel. An apparatus for generating a multi-channel representation uses the level parameter to correct the energy of the at least one transmitted downmix channel before entering the down-mix signal into an upmixer or within the up-mixing process.

Abstract translation: 具有多个原始信道的多信道信号的参数表示包括参数集合，当与至少一个缩减混合信道一起使用时，允许多信道重构。 计算附加电平参数，使得由电平参数加权的至少一个下混通道的能量等于原始通道的能量之和。 附加电平参数与参数组一起发送到多通道重构器，或与降混频道一起发送。 用于产生多通道表示的装置使用电平参数来校正至少一个发送的下混通道的能量，然后再将上混合信号输入上混器或在上混合过程中。

公开(公告)号：US20110058679A1

公开(公告)日：2011-03-10

申请号：US12882849

申请日：2010-09-15

Applicant: Machiel Willem Van Loon ,  Dirk Jeroen Breebaart ,  Gerard Herman Hotho ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roeden

Inventor： Machiel Willem Van Loon ,  Dirk Jeroen Breebaart ,  Gerard Herman Hotho ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roeden

IPC: H04R5/00

CPC classification number: H04S3/02 ,  G10L19/008 ,  H04S1/007 ,  H04S2400/03 ,  H04S2420/03

Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (L0, R0). A first signal and a third signal are added in order to obtain a first output signal (Low), wherein the first signal (L0wL) comprises the first stereo signal (L0) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (R0) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (R0) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (L0) modified by a second complex function (g2). The complex functions (g1, g2, g3, g4) are functions of the spatial parameters (P) and are chosen to be such that an energy value of the difference (L0wL,R0wL) between the first signal and the second signal is larger than or equal to the energy value of the sum (L0wL+R0wL) of the first and the second signal, and the energy value of the difference (R0wR−L0wR) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R0wR+L0wR) of the fourth signal and the third signal.

Abstract translation: 描述了一种用于处理从编码器获得的立体声信号的方法和装置，其将N声道音频信号编码为空间参数（P）和包括第一和第二立体声信号（L0，R0）的立体声缩混混音。 添加第一信号和第三信号以获得第一输出信号（Low），其中第一信号（L0wL）包括由第一复函数（g1）修改的第一立体声信号（L0）和第三信号 （L0wR）包括由第三复数函数（g3）修改的第二立体声信号（R0）。 添加第二信号和第四信号以获得第二输出信号（R0w）。 第四信号（R0wR）包括由第四复数函数（g4）修改的第二立体声信号（R0），第二信号（R0wL）包括由第二复函数（g2）修改的第一立体声信号（L0）。 复合函数（g1，g2，g3，g4）是空间参数（P）的函数，并且被选择为使得第一信号和第二信号之间的差值（L0wL，R0wL）的能量值大于 或等于第一和第二信号的和（L0wL + R0wL）的能量值，并且第四信号和第三信号之间的差值（R0wR-L0wR）的能量值大于或等于能量 第四信号和第三信号的和（R0wR + L0wR）的值。

公开(公告)号：US20060136229A1

公开(公告)日：2006-06-22

申请号：US11286199

申请日：2005-11-22

Applicant: Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Engdegard ,  Jonas Roeden

Inventor： Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Engdegard ,  Jonas Roeden

IPC: G10L21/00

CPC classification number: G10L19/008

Abstract: A parameter calculator calculates lower resolution parametric information and interpolation information. On a decoder-side, an upmixer is used for generating the output channels. The upmixer uses high resolution parametric information generated by a parameter interpolator using the low resolution parametric information and decoder-side derived interpolation information or encoder-generated interpolation information for selecting one of a plurality of different interpolation characteristics.

Abstract translation: 参数计算器计算低分辨率参数信息和插值信息。 在解码器侧，上混频器用于产生输出通道。 上混频器使用由参数内插器产生的高分辨率参数信息，其使用低分辨率参数信息和解码器侧导出的内插信息或编码器生成的用于选择多个不同插值特性之一的内插信息。

公开(公告)号：US08626503B2

公开(公告)日：2014-01-07

申请号：US12882862

申请日：2010-09-15

Applicant: Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Alexander Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjoerling ,  Karl Jonas Roeden

Inventor： Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Alexander Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjoerling ,  Karl Jonas Roeden

IPC: G10L21/04

CPC classification number: H04R5/04

Abstract: An audio encoder (109) has a hierarchical encoding structure and generates a data stream comprising one or more audio channels as well as parametric audio encoding data. The encoder (109) comprises an encoding structure processor (305) which inserts decoder tree structure data into the data stream. The decoder tree structure data comprises at least one data value indicative of a channel split characteristic for an audio channel at a hierarchical layer of the hierarchical decoder structure and may specifically specify the decoder tree structures to be applied by a decoder. A decoder (115) comprises a receiver (401) which receives the data stream and a decoder structure processor (405) for generating the hierarchical decoder structure in response to the decoder tree structure data. A decode processor (403) then generates output audio channels from the data stream using the hierarchical decoder structure.

Abstract translation: 音频编码器（109）具有分层编码结构，并且生成包括一个或多个音频信道以及参数音频编码数据的数据流。 编码器（109）包括将解码器树结构数据插入到数据流中的编码结构处理器（305）。 解码器树结构数据包括指示分层解码器结构的分级层处的音频信道的信道分离特性的至少一个数据值，并且可以具体指定要由解码器应用的解码器树结构。 解码器（115）包括接收数据流的接收机（401）和用于响应于解码器树结构数据产生分层解码器结构的解码器结构处理器（405）。 解码处理器（403）然后使用分层解码器结构从数据流生成输出音频通道。

公开(公告)号：US08515083B2

公开(公告)日：2013-08-20

申请号：US11290370

申请日：2005-11-29

Applicant: Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

Inventor： Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

IPC: H04R5/00 ,  G06F17/00 ,  G10L19/00

CPC classification number: G10L19/008 ,  G10L19/04 ,  H04S2420/03

Abstract: 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.

Abstract translation: 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

公开(公告)号：US08144879B2

公开(公告)日：2012-03-27

申请号：US12882849

申请日：2010-09-15

Applicant: Machiel Willem Van Loon ,  Dirk Jeroen Breebaart ,  Gerard Herman Hotho ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roeden

Inventor： Machiel Willem Van Loon ,  Dirk Jeroen Breebaart ,  Gerard Herman Hotho ,  Erik Gosuinus Petrus Schuijers ,  Heiko Purnhagen ,  Karl Jonas Roeden

IPC: H04R5/00

CPC classification number: H04S3/02 ,  G10L19/008 ,  H04S1/007 ,  H04S2400/03 ,  H04S2420/03

Abstract: A method and a device are described for processing a stereo signal obtained from an encoder, which encodes an N-channel audio signal into spatial parameters (P) and a stereo down-mix comprising first and second stereo signals (LO, RO). A first signal and a third signal are added in order to obtain a first output signal (L0w), wherein the first signal (L0wL) comprises the first stereo signal (LO) modified by a first complex function (g1), and the third signal (L0wR) comprises the second stereo signal (RO) modified by a third complex function (g3). A second signal and a fourth signal are added to obtain a second output signal (R0w). The fourth signal (R0wR) comprises the second stereo signal (RO) modified by a fourth complex function (g4), and the second signal (R0wL) comprises the first stereo signal (LO) modified by a second complex function (g2). The complex functions (g1, g2, g3, g4) are functions of the spatial parameters (P) and are chosen to be such that an energy value of the difference (L0wL,R0wL) between the first signal and the second signal is larger than or equal to the energy value of the sum (L0wL+R0wL) of the first and the second signal, and the energy value of the difference (R0wR−L0wR) between the fourth signal and the third signal is larger than or equal to the energy value of the sum (R0wR+L0wR) of the fourth signal and the third signal.

Abstract translation: 描述了一种用于处理从编码器获得的立体声信号的方法和装置，其将N声道音频信号编码为空间参数（P）和包括第一和第二立体声信号（LO，RO）的立体声下混合。 添加第一信号和第三信号以获得第一输出信号（L0w），其中第一信号（L0wL）包括由第一复函数（g1）修改的第一立体声信号（LO）和第三信号 （L0wR）包括由第三复合函数（g3）修改的第二立体声信号（RO）。 添加第二信号和第四信号以获得第二输出信号（R0w）。 第四信号（R0wR）包括由第四复数函数（g4）修改的第二立体声信号（RO），第二信号（R0wL）包括由第二复函数（g2）修改的第一立体声信号（LO）。 复合函数（g1，g2，g3，g4）是空间参数（P）的函数，并且被选择为使得第一信号和第二信号之间的差值（L0wL，R0wL）的能量值大于 或等于第一和第二信号的和（L0wL + R0wL）的能量值，并且第四信号和第三信号之间的差值（R0wR-L0wR）的能量值大于或等于能量 第四信号和第三信号的和（R0wR + L0wR）的值。

公开(公告)号：US20060165237A1

公开(公告)日：2006-07-27

申请号：US11290370

申请日：2005-11-29

Applicant: Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

Inventor： Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

IPC: H04R5/00 ,  H04B1/00

CPC classification number: G10L19/008 ,  G10L19/04 ,  H04S2420/03

Abstract: 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.

公开(公告)号：US20060140412A1

公开(公告)日：2006-06-29

申请号：US11290372

申请日：2005-11-29

Applicant: Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

Inventor： Lars Villemoes ,  Kristofer Kjoerling ,  Heiko Purnhagen ,  Jonas Roeden ,  Jeroen Breebaart ,  Gerard Hotho

IPC: H04H5/00

CPC classification number: G10L19/008 ,  G10L19/04 ,  H04S2420/03

Abstract: A multi-channel synthesizer for generating at least three output channels using an input signal having at least one base channel, the base channel being derived from the original multi-channel signal, the input signal further including at least two different up-mixing parameters, and an up-mixer mode indication 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 so that the at least three output channels are obtained.

Abstract translation: 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产生至少三个输出通道，所述基本通道从原始多通道信号导出，所述输入信号还包括至少两个不同的上混参数， 以及向上混合模式指示，其指示在要执行第一上调规则的第一状态中，并且在第二状态中指示要执行不同的第二上调规则，使用向上 混合器，用于响应于所述上混合器模式指示，基于所述第一或第二上混合规则，使用所述至少两个不同的上混合参数来上混合所述至少一个基本信道，使得所述至少三个输出信道 获得。

公开(公告)号：US20110211703A1

公开(公告)日：2011-09-01

申请号：US13040057

申请日：2011-03-03

Applicant: Lars Villemoes ,  Heiko Purnhagen ,  Jonas Roeden ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers

Inventor： Lars Villemoes ,  Heiko Purnhagen ,  Jonas Roeden ,  Jonas Engdegard ,  Jeroen Breebaart ,  Erik Schuijers

IPC: H04R5/00

CPC classification number: G10L19/008

Abstract: A parametric representation of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner is used to generate the parametric representation by combining a one or more spatial parameters and a stereo parameter resulting in a parametric representation having a decoder usable stereo parameter and an information on the one or more spatial parameters that represents, together with the decoder usable stereo parameter, the one or more spatial parameters.

Abstract translation: 当使用参数组合器时，具有适合于与单声道下混信号一起使用以计算多声道音频信号的重建的参数的多声道音频信号的参数表示可以以立体声向后兼容的方式有效地导出 通过组合一个或多个空间参数和立体声参数来产生参数表示，该立体参数导致具有解码器可用立体声参数的参数表示以及与解码器可用立体参数一起表示的一个或多个空间参数的信息， 一个或多个空间参数。