公开(公告)号：US20100179814A1

公开(公告)日：2010-07-15

申请号：US12687801

申请日：2010-01-14

申请人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

发明人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

IPC分类号： G10L19/00

CPC分类号： G10L19/008 ,  G10L19/0208

摘要： An apparatus for processing a plurality of real-valued subband signals using a first real-valued subband signal and a second real-valued subband signal to provide at least a complex-valued subband signal comprises a multiband filter for providing an intermediate real-valued subband signal and a calculator for providing the complex-valued subband signal by combining a real-valued subband signal from the plurality of real-valued subband signals and the intermediate subband signal.

摘要翻译： 一种用于使用第一实值子带信号和第二实值子带信号来处理多个实值子带信号以提供至少复值子带信号的装置包括多频带滤波器，用于提供中间实值子带 信号和用于通过组合来自多个实值子带信号和中间子带信号的实值子带信号来提供复值子带信号的计算器。

公开(公告)号：US20070100612A1

公开(公告)日：2007-05-03

申请号：US11463263

申请日：2006-08-08

申请人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

发明人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

IPC分类号： G10L19/00

CPC分类号： G10L19/0208

摘要： An apparatus for processing a plurality of real-valued subband signals using a first real-valued subband signal and a second real-valued subband signal to provide at least a complex-valued subband signal comprises a multiband filter for providing an intermediate real-valued subband signal and a calculator for providing the complex-valued subband signal by combining a real-valued subband signal from the plurality of real-valued subband signals and the intermediate subband signal.

摘要翻译： 一种用于使用第一实值子带信号和第二实值子带信号来处理多个实值子带信号以提供至少复值子带信号的装置包括多频带滤波器，用于提供中间实值子带 信号和用于通过组合来自多个实值子带信号和中间子带信号的实值子带信号来提供复值子带信号的计算器。

公开(公告)号：US20070230710A1

公开(公告)日：2007-10-04

申请号：US11571840

申请日：2005-07-07

申请人： Machiel Van Loon ,  Dirk Breebaart ,  Gerard Hotho ,  Erik Schuijers ,  Heiko Purnhagen ,  Karl Roden

发明人： Machiel Van Loon ,  Dirk Breebaart ,  Gerard Hotho ,  Erik Schuijers ,  Heiko Purnhagen ,  Karl Roden

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, 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 (Lo) 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.

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。

公开(公告)号：US06624768B1

公开(公告)日：2003-09-23

申请号：US09937606

申请日：2002-03-15

申请人： Nikolaus Meine ,  Heiko Purnhagen

发明人： Nikolaus Meine ,  Heiko Purnhagen

IPC分类号： H03M702

CPC分类号： H03M1/464

摘要： In the method for coding/decoding a target range from a value range, a recurrence step is repeated in a coding/decoding step for the target range until code bits are found for the target range to be coded, or the target range to be decoded is found using the code bits. In the recurrence step, an interval of the value range within which the target range to be coded/decoded is located is divided into two new intervals, and a single bit is used to indicate in which of the two new intervals the target range to be coded/decoded is located. The new interval indicated with the single bit is used as the interval for the next recurrence step. The code bits for the target range to be coded or the target range to be decoded is found when the interval falls below a minimum quantity. In at least one recurrence step, a probability distribution is used as the basis for the target range in the interval, and the new intervals are selected based on the probability distribution.

摘要翻译： 在从范围内对目标范围进行编码/解码的方法中，在针对目标范围的编码/解码步骤中重复执行重复步骤，直到找到要编码的目标范围的码位或要解码的目标范围 使用代码位找到。 在重复步骤中，要编码/解码的目标范围所在的值范围的间隔被划分为两个新的间隔，并且使用单个位来指示两个新间隔中的哪一个将目标范围为 编码/解码位于。 用单个位指示的新间隔用作下一个重复步骤的间隔。 当间隔低于最小量时，找到要编码的目标范围的码位或要解码的目标范围。 在至少一个重复步骤中，使用概率分布作为间隔中的目标范围的基础，并且基于概率分布来选择新的间隔。

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

IPC分类号： G10L21/00 ,  G10L19/14 ,  G10L19/12 ,  G10L19/00

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。

公开(公告)号：US20100153097A1

公开(公告)日：2010-06-17

申请号：US11909730

申请日：2006-03-16

申请人： Gerard Herman Hotho ,  Dirk Jeroen Breebart ,  Erik Gosuinus Petrus ,  Albertus Cornelis Den Brinker ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Karl Jonas Roden

发明人： Gerard Herman Hotho ,  Dirk Jeroen Breebart ,  Erik Gosuinus Petrus ,  Albertus Cornelis Den Brinker ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Karl Jonas Roden

IPC分类号： G10L19/00

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）。

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

IPC分类号： G10L19/00 ,  G10L19/14

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。

公开(公告)号：US20080255856A1

公开(公告)日：2008-10-16

申请号：US11995538

申请日：2006-07-07

申请人： Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjorling ,  Karl Jonas Roden

发明人： Erik Gosuinus Petrus Schuijers ,  Gerard Herman Hotho ,  Heiko Purnhagen ,  Wolfgang Schildbach ,  Holger Horich ,  Hans Magnus Kristofer Kjorling ,  Karl Jonas Roden

IPC分类号： G10L21/00

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A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生成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：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。