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1.发明授权公开(公告)号：US10930293B2
公开(公告)日：2021-02-23
申请号：US15136324
申请日：2016-04-22
发明人： Fabian Kuech , Christian Uhle , Michael Kratschmer , Bernhard Neugebauer , Michael Meier , Arne Borsum
IPC分类号： G10L21/034 , G10L19/16 , H03G11/00 , H03G9/00 , G06F3/16 , G10L19/018 , G10L19/008
摘要： The invention provides a concept for combined dynamic range compression and guided clipping prevention for audio devices. An audio decoder for decoding an audio bitstream and a metadata bitstream related to the audio bitstream according to the concept includes an audio processing chain including a plurality of adjustment stages including a dynamic range control stage for adjusting a dynamic range of the audio output signal and a guided clipping prevention stage for preventing clipping of the audio output signal; and a metadata decoder configured to receive the metadata bitstream and to extract dynamic range control gain sequences and guided clipping prevention gain sequences from the metadata bitstream, at least a part of the dynamic range control gain sequences being supplied to the dynamic range control stage, and at least a part of the guided clipping prevention gain sequences being supplied to the guided clipping prevention stage.
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2.发明授权公开(公告)号：US10154362B2
公开(公告)日：2018-12-11
申请号：US15002094
申请日：2016-01-20
摘要： An apparatus for mapping a first input channel and a second input channel of an input channel configuration to at least one output channel of an output channel configuration, wherein each input channel and each output channel has a direction in which an associated loudspeaker is located relative to a central listener position, configured to map the first input channel to a first output channel of the output channel configuration; and despite of the fact that an angle deviation between a direction of the second input channel and a direction of the first output channel is less than an angle deviation between a direction of the second input channel and the second output channel and/or is less than an angle deviation between the direction of the second input channel and the direction of the third output channel, map the second input channel to the second and third output channels by panning between the second and third output channels.
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公开(公告)号：US09936327B2
公开(公告)日：2018-04-03
申请号：US15000876
申请日：2016-01-19
CPC分类号： H04S7/303 , G10L19/008 , H04R5/02 , H04S3/002 , H04S3/02 , H04S7/30 , H04S7/302 , H04S7/305 , H04S7/308 , H04S2400/01 , H04S2400/03 , H04S2420/03
摘要： A method for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration includes providing a set of rules associated with each input channel of the plurality of input channels, wherein the rules define different mappings between the associated input channel and a set of output channels. For each input channel of the plurality of input channels, a rule associated with the input channel is accessed, determination is made whether the set of output channels defined in the accessed rule is present in the output channel configuration, and the accessed rule is selected if the set of output channels defined in the accessed rule is present in the output channel configuration. The input channels are mapped to the output channels according to the selected rule.
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4.发明授权公开(公告)号：US10937435B2
公开(公告)日：2021-03-02
申请号：US16431601
申请日：2019-06-04
发明人： Simone Fueg , Achim Kuntz , Michael Kratschmer , Juha Vilkamo
IPC分类号： H04R5/00 , G10L19/008 , G10L19/005 , G10L19/02 , G10L21/04 , H04S3/02
摘要： An audio signal processing decoder having at least one frequency band and being configured for processing an input audio signal having a plurality of input channels in the at least one frequency band, wherein the decoder is configured to analyze the input audio signal, wherein inter-channel dependencies between the input channels are identified; and to align the phases of the input channels based on the identified inter-channel dependencies, wherein the phases of input channels are the more aligned with respect to each other the higher their inter-channel dependency is; and to downmix the aligned input audio signal to an output audio signal having a lesser number of output channels than the number of the input channels.
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公开(公告)号：US10341801B2
公开(公告)日：2019-07-02
申请号：US15854967
申请日：2017-12-27
发明人： Christian Ertel , Johannes Hilpert , Andreas Hoelzer , Achim Kuntz , Jan Plogsties , Michael Kratschmer
IPC分类号： H04S5/00 , H04S7/00 , G10L19/008
摘要： An audio decoder device for decoding a compressed input audio signal having at least one core decoder having one or more processors for generating a processor output signal based on a processor input signal, wherein a number of output channels of the processor output signal is higher than a number of input channels of the processor input signal, wherein each of the one or more processors has a decorrelator and a mixer, wherein a core decoder output signal having a plurality of channels has the processor output signal, and wherein the core decoder output signal is suitable for a reference loudspeaker setup; at least one format converter device configured to convert the core decoder output signal into an output audio signal, which is suitable for a target loudspeaker setup; and a control device configured to control at least one or more processors in such way that the decorrelator of the processor may be controlled independently from the mixer of the processor, wherein the control device is configured to control at least one of the decorrelators of the one or more processors depending on the target loudspeaker setup.
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公开(公告)号：US10074377B2
公开(公告)日：2018-09-11
申请号：US15272653
申请日：2016-09-22
发明人： Fabian Kuech , Christian Uhle , Michael Kratschmer , Bernhard Neugebauer , Michael Meier , Stephan Schreiner
IPC分类号： G10L19/022 , G10L19/16 , H03G7/00
CPC分类号： G10L19/167 , G10L19/022 , H03G7/007
摘要： An audio encoder device includes an audio encoder configured for producing an encoded audio bitstream from an audio signal having consecutive audio frames; a dynamic range control encoder configured for producing an encoded dynamic range control bitstream from an dynamic range control sequence corresponding to the audio signal and having consecutive dynamic range control frames, wherein each dynamic range control frame of the dynamic range control frames has one or more nodes, wherein each node of the one or more nodes has gain information for the audio signal and time information indicating to which point in time the gain information corresponds.
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公开(公告)号：US20180124541A1
公开(公告)日：2018-05-03
申请号：US15854967
申请日：2017-12-27
发明人： Christian Ertel , Johannes Hilpert , Andreas Hoelzer , Achim Kuntz , Jan Plogsties , Michael Kratschmer
IPC分类号： H04S5/00 , G10L19/008 , H04S7/00
CPC分类号： H04S5/005 , G10L19/008 , H04S5/00 , H04S7/308 , H04S2400/01 , H04S2400/03 , H04S2400/05 , H04S2420/03
摘要： An audio decoder device for decoding a compressed input audio signal having at least one core decoder having one or more processors for generating a processor output signal based on a processor input signal, wherein a number of output channels of the processor output signal is higher than a number of input channels of the processor input signal, wherein each of the one or more processors has a decorrelator and a mixer, wherein a core decoder output signal having a plurality of channels has the processor output signal, and wherein the core decoder output signal is suitable for a reference loudspeaker setup; at least one format converter device configured to convert the core decoder output signal into an output audio signal, which is suitable for a target loudspeaker setup; and a control device configured to control at least one or more processors in such way that the decorrelator of the processor may be controlled independently from the mixer of the processor, wherein the control device is configured to control at least one of the decorrelators of the one or more processors depending on the target loudspeaker setup.
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公开(公告)号：US11477497B2
公开(公告)日：2022-10-18
申请号：US17330253
申请日：2021-05-25
发明人： Herbert Thoma , Robert Bleidt , Stefan Kraegeloh , Max Neuendorf , Achim Kuntz , Andreas Niedermeier , Michael Kratschmer
IPC分类号： H04N21/233 , H04N21/234 , H04N21/439 , H04H20/10 , H04N21/44 , H04N21/43 , H04L65/70 , H04L65/75 , H04L47/34
摘要： Audio splicing is rendered more effective by the use of one or more truncation unit packets inserted into the audio data stream so as to indicate to an audio decoder, for a predetermined access unit, an end portion of an audio frame with which the predetermined access unit is associated, as to be discarded in playout.
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公开(公告)号：US11025968B2
公开(公告)日：2021-06-01
申请号：US16712990
申请日：2019-12-13
发明人： Herbert Thoma , Robert Bleidt , Stefan Kraegeloh , Max Neuendorf , Achim Kuntz , Andreas Neidermeier , Michael Kratschmer
IPC分类号： H04N21/233 , H04N21/234 , H04N21/439 , H04H20/10 , H04N21/44 , H04N21/43 , H04L12/801 , H04L29/06
摘要： Audio splicing is rendered more effective by the use of one or more truncation unit packets inserted into the audio data stream so as to indicate to an audio decoder, for a predetermined access unit, an end portion of an audio frame with which the predetermined access unit is associated, as to be discarded in playout.
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公开(公告)号：US20210037334A1
公开(公告)日：2021-02-04
申请号：US17017053
申请日：2020-09-10
摘要： A method for mapping a plurality of input channels of an input channel configuration to output channels of an output channel configuration includes providing a set of rules associated with each input channel of the plurality of input channels, wherein the rules define different mappings between the associated input channel and a set of output channels. For each input channel of the plurality of input channels, a rule associated with the input channel is accessed, determination is made whether the set of output channels defined in the accessed rule is present in the output channel configuration, and the accessed rule is selected if the set of output channels defined in the accessed rule is present in the output channel configuration. The input channels are mapped to the output channels according to the selected rule.
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