公开(公告)号：US20080201153A1

公开(公告)日：2008-08-21

申请号：US11995700

申请日：2006-07-12

申请人： Dirk Jeroen Breebaart ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Christof Faller

发明人： Dirk Jeroen Breebaart ,  Lars Falck Villemoes ,  Heiko Purnhagen ,  Christof Faller

IPC分类号： G10L19/00

CPC分类号： H04S3/008 ,  G10L19/008

摘要： A decoder (115) generates a multi channel audio signal, such as a surround sound signal, from a received first signal. The multi-channel signal comprises a second set of audio channels and the first signal comprises a first set of audio channels. The decoder (115) comprises a receiver (401) which receives the first signal. The receiver (401) is coupled to an estimate processor (405) which generates estimated parametric data for the second set of audio channels in response to characteristics of the first set of audio channels. The estimated parametric data relates characteristics of the second set of audio channels to characteristics of the first set of audio channels. The decoder (115) furthermore comprises a spatial audio decoder (403) which decodes the first signal in response to the estimated parametric data to generate the multi-channel signal comprising the second set of channels. The invention allows use of spatial audio decoding with signals that are not encoded by a spatial audio encoder.

摘要翻译： 解码器（115）从接收的第一信号生成诸如环绕声信号的多声道音频信号。 多声道信号包括第二组音频通道，第一信号包括第一组音频通道。 解码器（115）包括接收第一信号的接收机（401）。 接收器（401）耦合到估计处理器（405），该估计处理器响应于第一组音频通道的特性而产生第二组音频通道的估计参数数据。 估计的参数数据将第二组音频通道的特性与第一组音频通道的特性相关联。 解码器（115）还包括空间音频解码器（403），其响应于所估计的参数数据对第一信号进行解码，以产生包括第二组信道的多信道信号。 本发明允许对空间音频编码器未编码的信号使用空间音频解码。

公开(公告)号：US20070067162A1

公开(公告)日：2007-03-22

申请号：US10577106

申请日：2004-10-28

申请人： Lars Villemoes ,  Per Ekstrand ,  Heiko Purnhagen ,  Erik Schuijers ,  Fransiscus de Bont

发明人： Lars Villemoes ,  Per Ekstrand ,  Heiko Purnhagen ,  Erik Schuijers ,  Fransiscus de Bont

IPC分类号： G10L11/04

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：US09378745B2

公开(公告)日：2016-06-28

申请号：US13638901

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： G10L19/06 ,  H04S3/00 ,  G10L19/008

CPC分类号： G10L19/008 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/167 ,  G10L25/12 ,  H04S3/008 ,  H04S2400/01

摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The method comprises applying independent bandwidth limits for the input channels.

摘要翻译： 本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。 在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。 该方法包括对输入通道应用独立的带宽限制。

公开(公告)号：US09159326B2

公开(公告)日：2015-10-13

申请号：US13638900

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： H04R5/00 ,  G10L19/008

CPC分类号： G10L19/008 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/167 ,  G10L25/12 ,  H04S3/008 ,  H04S2400/01

摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency domain representation of the second input channel and a complex prediction coefficient. The method comprises performing frequency-domain modifications selectively before or after upmixing.

摘要翻译： 本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。 在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。 该方法包括在混合之前或之后选择性地执行频域修改。

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。

公开(公告)号：US08515083B2

公开(公告)日：2013-08-20

申请号：US11290370

申请日：2005-11-29

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

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

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

CPC分类号： G10L19/008 ,  G10L19/04 ,  H04S2420/03

摘要： 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.

摘要翻译： 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：US08443026B2

公开(公告)日：2013-05-14

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： G06F17/10

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：US20130028426A1

公开(公告)日：2013-01-31

申请号：US13638898

申请日：2011-04-06

申请人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

发明人： Heiko Purnhagen ,  Pontus Carlsson ,  Lars Villemoes

IPC分类号： H04R5/00

CPC分类号： G10L19/008 ,  G10L19/0212 ,  G10L19/06 ,  G10L19/167 ,  G10L25/12 ,  H04S3/008 ,  H04S2400/01

摘要： The invention provides methods and devices for stereo encoding and decoding using complex prediction in the frequency domain. In one embodiment, a decoding method, for obtaining an output stereo signal from an input stereo signal encoded by complex prediction coding and comprising first frequency-domain representations of two input channels, comprises the upmixing steps of: (i) computing a second frequency-domain representation of a first input channel; and (ii) computing an output channel on the basis of the first and second frequency-domain representations of the first input channel, the first frequency-domain representation of the second input channel and a complex prediction coefficient. The upmixing can be suspended responsive to control data.

摘要翻译： 本发明提供使用频域中的复数预测的立体声编码和解码的方法和装置。 在一个实施例中，一种用于从由复数预测编码编码的输入立体声信号中获得输出立体声信号并包括两个输入声道的第一频域表示的解码方法包括上混合步骤：（i）计算第二频率 - 第一输入通道的域表示; 以及（ii）基于第一输入通道的第一和第二频域表示，第二输入通道的第一频域表示和复数预测系数来计算输出通道。 响应于控制数据可以暂停上混。

公开(公告)号：US08285771B2

公开(公告)日：2012-10-09

申请号：US12716777

申请日：2010-03-03

申请人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

发明人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

IPC分类号： G06F17/10

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.

公开(公告)号：US08180818B2

公开(公告)日：2012-05-15

申请号：US12716739

申请日：2010-03-03

申请人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

发明人： Per Ekstrand ,  Lars Villemoes ,  Heiko Purnhagen

IPC分类号： G06F17/10

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。