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公开(公告)号：US08073685B2
公开(公告)日：2011-12-06
申请号：US12397518
申请日：2009-03-04
申请人： Lars Falck Villemoes , Per Elstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus Bont
发明人： Lars Falck Villemoes , Per Elstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus Bont
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： 提供对音频信号进行编码，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，进一步的子带滤波至少一个 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。
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公开(公告)号：US08346564B2
公开(公告)日：2013-01-01
申请号：US11909730
申请日：2006-03-16
申请人： Gerard Herman Hotho , Dirk Jeroen Breebaart , Erik Gosuinus Petrus Schuijers , Albertus Cornelis Den Brinker , Lars Falck Villemoes , Heiko Purnhagen , Karl Jonas Roden
发明人： Gerard Herman Hotho , Dirk Jeroen Breebaart , Erik Gosuinus Petrus Schuijers , Albertus Cornelis Den Brinker , Lars Falck Villemoes , Heiko Purnhagen , Karl Jonas Roden
CPC分类号： G10L19/008 , H04R2420/07 , H04S3/008
摘要： A multi-channel audio encoder (10) for encoding a multi-channel audio signal (101), e.g. a 5.1 channel audio signal, into a spatial down-mix (102), e.g. a stereo signal, and associated parameters (104, 105). The encoder (10) comprises first and second units (110, 120). The first unit (110) encodes the multi-channel audio signal (101) into the spatial down-mix (102) and parameters (104). These parameters (104) enable a multi-channel decoder (20) to reconstruct the multi-channel audio signal (203) from the spatial down-mix (102). The second unit (120) generates, from the spatial down-mix (102), parameters (105) that enable the decoder to reconstruct the spatial down-mix (202) from an alternative down-mix (103), e.g. a so-called artistic down-mix that has been manually mixed in a sound studio. In this way, the decoder (20) can efficiently deal with a situation in which an alternative down-mix (103) is received instead of the regular spatial, down-mix (102). In the decoder (20), first the spatial down-mix (202) is reconstructed from the alternative down-mix (103) and the parameters (105). Next, the spatial down-mix (202) is decoded into the multi-channel audio signal (203).
摘要翻译： 一种用于对多声道音频信号（101）进行编码的多声道音频编码器（10）。 5.1声道音频信号转换成空间缩混（102）。 立体声信号和相关参数（104,105）。 编码器（10）包括第一和第二单元（110,120）。 第一单元（110）将多声道音频信号（101）编码成空间缩混（102）和参数（104）。 这些参数（104）使得多声道解码器（20）能够从空间缩混（102）重建多声道音频信号（203）。 第二单元（120）从空间缩混（102）生成参数（105），使参数（105）能够使解码器从替代的下混合（103）重构空间缩混（202）。 所谓的艺术混合，已经在一个健全的工作室手工混合。 以这种方式，解码器（20）可以有效地处理接收替代的下混合（103）而不是常规的空间，混合（102）的情况。 在解码器（20）中，首先，从替代的下混合（103）和参数（105）重构空间缩混（202）。 接下来，空间缩混（202）被解码为多声道音频信号（203）。
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公开(公告)号：US08260607B2
公开(公告)日：2012-09-04
申请号：US13076335
申请日：2011-03-30
申请人： Lars Falck Villemoes , Per Ekstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus De Bont
发明人： Lars Falck Villemoes , Per Ekstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus De Bont
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： 提供对音频信号进行编码，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，进一步的子带滤波至少一个 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，从子子带信号和未被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。
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公开(公告)号：US07519538B2
公开(公告)日：2009-04-14
申请号：US10577106
申请日：2004-10-28
申请人： Lars Falck Villemoes , Per Ekstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus de Bont
发明人： Lars Falck Villemoes , Per Ekstrand , Heiko Purnhagen , Erik Gosuinus Petrus Schuijers , Fransiscus Marinus Jozephus de Bont
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： 提供对音频信号进行编码，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。
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公开(公告)号：US08626503B2
公开(公告)日：2014-01-07
申请号：US12882862
申请日：2010-09-15
申请人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjoerling , Karl Jonas Roeden
发明人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjoerling , Karl Jonas Roeden
IPC分类号： G10L21/04
CPC分类号： H04R5/04
摘要： 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.
摘要翻译： 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。
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6.发明授权公开(公告)号：US08144879B2
公开(公告)日：2012-03-27
申请号：US12882849
申请日：2010-09-15
申请人： Machiel Willem Van Loon , Dirk Jeroen Breebaart , Gerard Herman Hotho , Erik Gosuinus Petrus Schuijers , Heiko Purnhagen , Karl Jonas Roeden
发明人： Machiel Willem Van Loon , Dirk Jeroen Breebaart , Gerard Herman Hotho , Erik Gosuinus Petrus Schuijers , Heiko Purnhagen , Karl Jonas Roeden
IPC分类号： H04R5/00
CPC分类号： H04S3/02 , G10L19/008 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07966191B2
公开(公告)日：2011-06-21
申请号：US11995538
申请日：2006-07-07
申请人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjorling , Karl Jonas Roden
发明人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjorling , Karl Jonas Roden
IPC分类号： G10L19/00
CPC分类号： G10L19/008 , H04S2420/03
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US08793125B2
公开(公告)日：2014-07-29
申请号：US11571838
申请日：2005-07-11
CPC分类号： H04S5/005 , G10L19/008
摘要： A device (1) for converting a first number (M) of input audio channels into a second, larger number (N) of output audio channels comprises: decorrelation units (3) for decomposing the input audio channels into a set of decorrelated auxiliary channels, at least one upmix unit (4) for combining the decorrelated auxiliary channels into the output audio channels, and at least one pre-processing unit (2) for pre-processing the input audio channels and feeding the pre-processed input audio channels to the decorrelation units (3). The pre-processing unit (2) and the upmix unit (4) are preferably controlled by audio parameters.
摘要翻译： 用于将输入音频通道的第一数量（M）转换为第二，更大数量（N）的输出音频通道的设备（1）包括：用于将输入音频通道分解为一组去相关的辅助通道的解相关单元（3） 至少一个用于将解相关辅助通道组合成输出音频通道的上混单元（4），以及至少一个预处理单元（2），用于预处理输入音频通道并将预处理的输入音频通道馈送到 去相关单位（3）。 预处理单元（2）和上混单元（4）优选地由音频参数控制。
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9.发明授权公开(公告)号：US08150042B2
公开(公告)日：2012-04-03
申请号：US11571840
申请日：2005-07-07
申请人： Machiel Willem Van Loon , Dirk Jeroen Breebaart , Gerard Herman Hotho , Erik Gosuinus Petrus Schuijers , Heiko Purnhagen , Karl Jonas Roden
发明人： Machiel Willem Van Loon , Dirk Jeroen Breebaart , Gerard Herman Hotho , Erik Gosuinus Petrus Schuijers , Heiko Purnhagen , Karl Jonas Roden
IPC分类号： H04R5/00
CPC分类号： H04S3/02 , G10L19/008 , H04S1/007 , H04S2400/03 , H04S2420/03
摘要： Techniques are described for combining parametric multi-channel audio coding with matrixing, reconstructing a full-quality multi-channel, independent of the decoder. A stereo signal is obtained from encoding an N-channel audio signal into spatial parameters and a stereo down-mix signal having first and second stereo signals, including adding a first signal and a third signal to obtain a first output signal, the first signal having the first stereo signal modified by a first complex function, the third signal having the second stereo signal modified by a third complex function. A second signal and fourth signal are similarly added to obtain a second output signal. Complex functions are chosen such that an energy value of the difference between first signal and the second signals (fourth signal and third signals) is larger than or equal to the energy value of the sum of the first and the second signal (fourth signal and third signal).
摘要翻译： 描述了将参数化多通道音频编码与矩阵相结合的技术，重建了独立于解码器的全质量多通道。 通过将N声道音频信号编码为空间参数和具有第一和第二立体声信号的立体声缩混信号获得立体声信号，包括添加第一信号和第三信号以获得第一输出信号，所述第一信号具有 由第一复合函数修改的第一立体声信号，具有由第三复合函数修改的第二立体声信号的第三信号。 类似地添加第二信号和第四信号以获得第二输出信号。 选择复数函数，使得第一信号和第二信号（第四信号和第三信号）之间的差的能量值大于或等于第一和第二信号之和的能量值（第四信号和第三信号 信号）。
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公开(公告)号：US20110091045A1
公开(公告)日：2011-04-21
申请号：US12882862
申请日：2010-09-15
申请人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjoerling , Karl Jonas Roeden
发明人： Erik Gosuinus Petrus Schuijers , Gerard Herman Hotho , Heiko Purnhagen , Wolfgang Alexander Schildbach , Holger Horich , Hans Magnus Kristofer Kjoerling , Karl Jonas Roeden
IPC分类号： H04R5/00
CPC分类号： H04R5/04
摘要： 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.
摘要翻译： 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。
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