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公开(公告)号：US12198705B2
公开(公告)日：2025-01-14
申请号：US18159932
申请日：2023-01-26
Inventor： Eleni Fotopoulou , Jan Büthe , Emmanuel Ravelli , Pallavi Maben , Martin Dietz , Franz Reutelhuber , Stefan Döhla , Srikanth Korse
IPC: G10L19/008 , G10L21/0216 , G10L25/06 , G10L25/18
Abstract: An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, includes a signal analyzer for estimating a signal characteristic of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure or using a second weighting procedure depending on a signal characteristic estimated by the signal analyzer, wherein the first weighting procedure is different from the second weighting procedure; and a processor for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.
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公开(公告)号：US12159641B2
公开(公告)日：2024-12-03
申请号：US17547971
申请日：2021-12-10
Inventor： Jan Büthe , Markus Schnell , Stefan Döhla , Bernhard Grill , Martin Dietz
IPC: G10L19/002 , G10L19/22 , G10L19/032
Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
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公开(公告)号：US12039986B2
公开(公告)日：2024-07-16
申请号：US17394068
申请日：2021-08-04
Inventor： Adrian Tomasek , Ralph Sperschneider , Jan Büthe , Conrad Benndorf , Martin Dietz , Markus Schnell , Maximilian Schlegel
IPC: G10L19/035 , G10L19/022 , G10L21/0324 , H03M13/07 , H03M13/15 , H04B17/309 , H04L1/00
CPC classification number: G10L19/035 , G10L19/022 , G10L21/0324 , H03M13/07 , H03M13/1515 , H04B17/309 , H04L1/0009 , H04L1/0032 , H04L1/0042 , H04L1/0045 , H04L1/0046 , H04L1/0084
Abstract: FIG. 1 illustrates a decoder for decoding a current frame to reconstruct an audio signal according to an embodiment. The audio signal is encoded within the current frame. The current frame includes a current bitstream payload. The current bitstream payload includes a plurality of payload bits. The plurality of payload bits encodes a plurality of spectral lines of a spectrum of the audio signal. Each of the payload bits exhibits a position within the current bitstream payload. The decoder includes a decoding module and an output interface. The decoding module is configured to reconstruct the audio signal. The output interface is configured to output the audio signal.
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公开(公告)号：US12033647B2
公开(公告)日：2024-07-09
申请号：US17546540
申请日：2021-12-09
Inventor： Jan Büthe , Markus Schnell , Stefan Döhla , Bernhard Grill , Martin Dietz
IPC: G10L19/02 , G10L19/06 , G10L19/22 , G10L19/24 , G10L19/032
CPC classification number: G10L19/22 , G10L19/032
Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
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公开(公告)号：US11341975B2
公开(公告)日：2022-05-24
申请号：US16738301
申请日：2020-01-09
Inventor： Jan Büthe , Franz Reutelhuber , Sascha Disch , Guillaume Fuchs , Markus Multrus , Ralf Geiger
IPC: G10L19/008 , G10L19/02 , G10L19/26
Abstract: An apparatus for decoding an encoded multichannel signal includes: a base channel decoder for decoding an encoded base channel to obtain a decoded base channel; a decorrelation filter for filtering at least a portion of the decoded base channel to obtain a filling signal; and a multichannel processor for performing a multichannel processing using a spectral representation of the decoded base channel and a spectral representation of the filling signal, wherein the decorrelation filter is a broad band filter and the multichannel processor is configured to apply a narrow band processing to the spectral representation of the decoded base channel and the spectral representation of the filling signal.
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Patent Agency Ranking
公开(公告)号：US12175991B2
公开(公告)日：2024-12-24
申请号：US17546540
申请日：2021-12-09
Inventor： Jan Büthe , Markus Schnell , Stefan Döhla , Bernhard Grill , Martin Dietz
IPC: G10L19/02 , G10L19/06 , G10L19/22 , G10L19/24 , G10L19/032
Abstract: An audio encoder for encoding audio input data has: a preprocessor for preprocessing the audio input data to obtain audio data to be coded; a coder processor for coding the audio data to be coded; and a controller for controlling the coder processor so that, depending on a first signal characteristic of a first frame of the audio data to be coded, a number of audio data items of the audio data to be coded by the coder processor for the first frame is reduced compared to a second signal characteristic of a second frame, and a first number of information units used for coding the reduced number of audio data items for the first frame is stronger enhanced compared to a second number of information units for the second frame.
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7.发明授权公开(公告)号：US12009002B2
公开(公告)日：2024-06-11
申请号：US17400422
申请日：2021-08-12
Inventor： Adrian Tomasek , Ralph Sperschneider , Jan Büthe , Alexander Tschekalinskij , Manfred Lutzky
IPC: G10L19/00 , G10L19/022 , G10L19/035 , G10L21/0324 , H03M13/07 , H03M13/15 , H04B17/309 , H04L1/00
CPC classification number: G10L19/035 , G10L19/022 , G10L21/0324 , H03M13/07 , H03M13/1515 , H04B17/309 , H04L1/0009 , H04L1/0032 , H04L1/0042 , H04L1/0045 , H04L1/0046 , H04L1/0084
Abstract: An audio transmitter processor for generating an error protected frame using encoded audio data of an audio frame, the encoded audio data for the audio frame having a first amount of information units and a second amount of information units, has: a frame builder for building a codeword frame having a codeword raster, wherein the frame builder is configured to determine a border between a first amount of information units and a second amount of information units so that a starting information unit of the second amount of information units coincides with a codeword border; and an error protection coder to obtain a plurality of processed codewords representing the error protected frame.
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公开(公告)号：US11594231B2
公开(公告)日：2023-02-28
申请号：US17036261
申请日：2020-09-29
Inventor： Eleni Fotopoulou , Jan Büthe , Emmanuel Ravelli , Pallavi Maben , Martin Dietz , Franz Reutelhuber , Stefan Döhla , Srikanth Korse
IPC: G10L19/008 , G10L25/06 , G10L21/0216 , G10L25/18
Abstract: An apparatus for estimating an inter-channel time difference between a first channel signal and a second channel signal, includes a signal analyzer for estimating a signal characteristic of the first channel signal or the second channel signal or both signals or a signal derived from the first channel signal or the second channel signal; a calculator for calculating a cross-correlation spectrum for a time block from the first channel signal in the time block and the second channel signal in the time block; a weighter for weighting a smoothed or non-smoothed cross-correlation spectrum to obtain a weighted cross correlation spectrum using a first weighting procedure or using a second weighting procedure depending on a signal characteristic estimated by the signal analyzer, wherein the first weighting procedure is different from the second weighting procedure; and a processor for processing the weighted cross-correlation spectrum to obtain the inter-channel time difference.
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公开(公告)号：US11978459B2
公开(公告)日：2024-05-07
申请号：US17122403
申请日：2020-12-15
Inventor： Jan Büthe , Eleni Fotopoulou , Srikanth Korse , Pallavi Maben , Markus Multrus , Franz Reutelhuber
IPC: G10L19/008
CPC classification number: G10L19/008
Abstract: In multichannel audio coding, improved computational efficiency is achieved by computing comparison parameters for ITD compensation between any two channels in the frequency domain for a parametric audio encoder. This may mitigate negative effects on encoder parameter estimates.
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公开(公告)号：US11790922B2
公开(公告)日：2023-10-17
申请号：US17543819
申请日：2021-12-07
Inventor： Jan Büthe , Franz Reutelhuber , Sascha Disch , Guillaume Fuchs , Markus Multrus , Ralf Geiger
IPC: G10L19/008 , G10L19/02 , G10L19/26
CPC classification number: G10L19/008 , G10L19/0204 , G10L19/26
Abstract: An apparatus for decoding an encoded multichannel signal includes: a base channel decoder for decoding an encoded base channel to obtain a decoded base channel; a decorrelation filter for filtering at least a portion of the decoded base channel to obtain a filling signal; and a multichannel processor for performing a multichannel processing using a spectral representation of the decoded base channel and a spectral representation of the filling signal, wherein the decorrelation filter is a broad band filter and the multichannel processor is configured to apply a narrow band processing to the spectral representation of the decoded base channel and the spectral representation of the filling signal.
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