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1.发明公开公开(公告)号：US20240363130A1
公开(公告)日：2024-10-31
申请号：US18769966
申请日：2024-07-11
Inventor： Fabian KUECH , Christian UHLE , Michael KRATSCHMER , Bernhard NEUGEBAUER , Michael MEIER , Arne BORSUM
IPC: G10L19/16 , G06F3/16 , G10L19/008 , G10L19/018 , G10L21/034 , H03G9/00 , H03G11/00
CPC classification number: G10L19/167 , G06F3/165 , G10L19/018 , G10L21/034 , H03G9/005 , H03G11/008 , G10L19/008
Abstract: 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.发明公开公开(公告)号：US20240363128A1
公开(公告)日：2024-10-31
申请号：US18769853
申请日：2024-07-11
Inventor： Fabian KUECH , Christian UHLE , Michael KRATSCHMER , Bernhard NEUGEBAUER , Michael MEIER , Arne BORSUM
IPC: G10L19/16 , G06F3/16 , G10L19/008 , G10L19/018 , G10L21/034 , H03G9/00 , H03G11/00
CPC classification number: G10L19/167 , G06F3/165 , G10L19/018 , G10L21/034 , H03G9/005 , H03G11/008 , G10L19/008
Abstract: 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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公开(公告)号：US20240186972A1
公开(公告)日：2024-06-06
申请号：US18436667
申请日：2024-02-08
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Brett G. CROCKETT , Alan J. SEEFELDT
IPC: H03G3/30 , G10L21/038 , G10L25/21 , G10L25/51 , H03G1/00 , H03G7/00 , H03G9/00 , H04R3/00 , H04R3/04
CPC classification number: H03G3/3005 , G10L21/038 , G10L25/21 , G10L25/51 , H03G1/00 , H03G3/3089 , H03G7/007 , H03G9/005 , H04R3/00 , H04R3/04 , H04R2430/03
Abstract: In some embodiments, a method for processing an audio signal in an audio processing apparatus is disclosed. The method includes receiving an audio signal and a parameter, the parameter indicating a location of an auditory event boundary. An audio portion between consecutive auditory event boundaries constitutes an auditory event. The method further includes applying a modification to the audio signal based in part on an occurrence of the auditory event. The parameter may be generated by monitoring a characteristic of the audio signal and identifying a change in the characteristic.
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公开(公告)号：US20240168706A1
公开(公告)日：2024-05-23
申请号：US18535526
申请日：2023-12-11
Inventor： Jeroen Koppens , Jeffrey Riedmiller , Kristofer Kjoerling , Alexander Stahlmann , Holger Hoerich , Alan J. Seefeldt
IPC: G06F3/16 , G10L19/16 , G10L21/0324 , H03G3/30 , H03G7/00 , H03G9/00 , H03G9/02 , H03G9/12 , H03G9/18 , H04S1/00 , H04S7/00
CPC classification number: G06F3/165 , G10L19/167 , G10L21/0324 , H03G3/3005 , H03G3/3089 , H03G7/002 , H03G7/007 , H03G9/005 , H03G9/025 , H03G9/12 , H03G9/18 , H04S1/00 , H04S7/30 , H04S2400/13
Abstract: In an audio encoder, for audio content received in a source audio format, default gains are generated based on a default dynamic range compression (DRC) curve, and non-default gains are generated for a non-default gain profile. Based on the default gains and non-default gains, differential gains are generated. An audio signal comprising the audio content, the default DRC curve, and differential gains is generated. In an audio decoder, the default DRC curve and the differential gains are identified from the audio signal. Default gains are re-generated based on the default DRC curve. Based on the combination of the re-generated default gains and the differential gains, operations are performed on the audio content extracted from the audio signal.
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公开(公告)号：US20190222188A1
公开(公告)日：2019-07-18
申请号：US16328876
申请日：2017-09-22
Applicant: SONY CORPORATION
Inventor： YUJI TSUCHIDA
CPC classification number: H03G5/165 , G06F16/68 , G10L21/034 , H03G3/002 , H03G9/005 , H03G9/18 , H04R3/04
Abstract: The present technology relates to an information processing device, an information processing method, and a program which are capable of obtaining sound volume correction effects more suitable for an auditory sensation.Target data which is a statistical value of metadata of each audio signal of an audio signal group is acquired, metadata of an audio signal to be reproduced is acquired, and either or both of a correction value of a sound volume of the audio signal to be reproduced and a correction value of a sound quality of the audio signal to be reproduced is calculated using the acquired target data and the acquired metadata. The present disclosure can be applied to, for example, an information processing device, an electronic device, a computer, a server, a program, a storage medium, a system, and the like.
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Patent Agency Ranking
公开(公告)号：US20190115893A1
公开(公告)日：2019-04-18
申请号：US16211579
申请日：2018-12-06
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Alan Jeffrey Seefeldt
IPC: H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L19/008 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02
CPC classification number: H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
Abstract: The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.
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公开(公告)号：US20190115888A1
公开(公告)日：2019-04-18
申请号：US16211546
申请日：2018-12-06
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Alan Jeffrey Seefeldt
IPC: H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L19/008 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02
CPC classification number: H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
Abstract: The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.
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公开(公告)号：US20190115887A1
公开(公告)日：2019-04-18
申请号：US16211542
申请日：2018-12-06
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Alan Jeffrey Seefeldt
IPC: H03G3/30 , G10L25/21 , G10L21/038 , H03G9/14 , H03G9/00 , H03G3/32 , G10L19/008 , G10L21/0232 , H03G3/20 , H03G9/02 , H03G9/24 , H04S3/02
CPC classification number: H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
Abstract: The invention relates to methods and apparatus for adjusting a level of an audio signal. An audio signal is divided into a plurality of frequency bands. Modification parameters are obtained for at least one of the plurality of frequency band. Gain factors are derived for at least one of the plurality of frequency bands, the gain factors determined based on the amplitude scale factors. The gain factors are smoothed. A level of noise from noise compensation factors is determined. The gain factors are applied to at least one of the frequency bands to generate gain adjusted frequency bands. The level of noise is adjusted based on the gain adjusted frequency bands. At least one of the frequency bands is filtered with a filter generated with the filter coefficients. The plurality of frequency bands is synthesized to generate an output audio signal.
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公开(公告)号：US10008998B2
公开(公告)日：2018-06-26
申请号：US14095951
申请日：2013-12-03
Applicant: Timothy Shuttleworth
Inventor： Timothy Shuttleworth
Abstract: A method, apparatus, and system for measuring and analyzing the effects of dynamics modifying processors on a signal. This new approach utilizes statistical analysis techniques to provide a direct comparison and evaluation between the processed signal and the unprocessed signal's dynamic characteristics. The method identifies and quantifies Effective Dynamic Range, Clip Tolerance, Lower Limit Tolerance, Crest Factor, and Diminuendo Factor, using either peak or r.m.s values. In an alternative embodiment, the invention allows for user adjustment and control of the relative relationship of Crest Factor and Diminuendo Factor, which the user may perceive as loudness.
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10.发明授权公开(公告)号：US09966916B2
公开(公告)日：2018-05-08
申请号：US15672552
申请日：2017-08-09
Applicant: Dolby Laboratories Licensing Corporation
Inventor： Alan Jeffrey Seefeldt
IPC: H03G3/00 , H03G3/30 , G10L19/008 , G10L21/0232 , G10L21/038 , H03G9/24 , G10L25/21
CPC classification number: H03G3/3005 , G10L19/008 , G10L21/0232 , G10L21/038 , G10L25/21 , H03G3/20 , H03G3/32 , H03G9/005 , H03G9/025 , H03G9/14 , H03G9/24 , H04S3/02 , H04S2420/03
Abstract: The invention relates to the measurement and control of the perceived sound loudness and/or the perceived spectral balance of an audio signal. An audio signal is modified in response to calculations performed at least in part in the perceptual (psychoacoustic) loudness domain. The invention is useful, for example, in one or more of: loudness-compensating volume control, automatic gain control, dynamic range control (including, for example, limiters, compressors, expanders, etc.), dynamic equalization, and compensating for background noise interference in an audio playback environment. The invention includes not only methods but also corresponding computer programs and apparatus.
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