公开(公告)号：US11636865B2

公开(公告)日：2023-04-25

申请号：US17392908

申请日：2021-08-03

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Martin Sehlstedt

IPC分类号： G10L19/02 ,  G10L25/78 ,  G10L21/0324 ,  G10L21/0388 ,  G10L19/012 ,  G10L25/03

摘要： Background noise estimators and methods are disclosed for estimating background noise in an audio signal. Some methods include obtaining at least one parameter associated with an audio signal segment, such as a frame or part of a frame, based on a first linear prediction gain, calculated as a quotient between a residual signal from a 0th-order linear prediction and a residual signal from a 2nd-order linear prediction for the audio signal segment. A second linear prediction gain is calculated as a quotient between a residual signal from a 2nd-order linear prediction and a residual signal from a 16th-order linear prediction for the audio signal segment. Whether the audio signal segment comprises a pause is determined based at least on the obtained at least one parameter; and a background noise estimate is updated based on the audio signal segment when the audio signal segment comprises a pause.

公开(公告)号：US11605395B2

公开(公告)日：2023-03-14

申请号：US16783624

申请日：2020-02-06

申请人： Staton Techiya LLC

发明人： John Usher ,  Dan Ellis

IPC分类号： G10L15/30 ,  G10L21/0388 ,  H04R3/00 ,  H04R1/02 ,  H04R1/10 ,  H04R5/033

摘要： A method and device for automatically increasing the spectral bandwidth of an audio signal including generating a “mapping” (or “prediction”) matrix based on the analysis of a reference wideband signal and a reference narrowband signal, the mapping matrix being a transformation matrix to predict high frequency energy from a low frequency energy envelope, generating an energy envelope analysis of an input narrowband audio signal, generating a resynthesized noise signal by processing a random noise signal with the mapping matrix and the envelope analysis, high-pass filtering the resynthesized noise signal, and summing the high-pass filtered resynthesized noise signal with the input narrowband audio signal. Other embodiments are disclosed.

公开(公告)号：US11538484B2

公开(公告)日：2022-12-27

申请号：US17188262

申请日：2021-03-01

申请人： QUALCOMM Incorporated

发明人： Venkatraman Atti ,  Venkata Subrahmanyam Chandra Sekhar Chebiyyam

IPC分类号： G10L19/008 ,  G10L21/0388 ,  G10L19/04 ,  G10L19/02

摘要： A device includes an encoder configured to generate a first high-band portion of a first signal based on a left signal and a right signal. The encoder is also configured to generate a set of adjustment gain parameters based on a high-band non-reference signal and a synthesized signal. The high-band non-reference signal corresponds to one of a left high-band portion of the left signal or a right high-band portion of the right signal.

公开(公告)号：US11295754B2

公开(公告)日：2022-04-05

申请号：US16940792

申请日：2020-07-28

申请人： Apple Inc.

发明人： Christopher T. Eubank ,  Lance Jabr ,  Matthew S. Connolly ,  Robert D. Silfvast ,  Sean A. Ramprashad ,  Carlos Avendano ,  Miquel Espi Marques

IPC分类号： G10L21/0388 ,  G10L21/0208 ,  G10L19/008 ,  G10L21/0272

摘要： A first device obtains, from the array, several audio signals and processes the audio signals to produce a speech signal and one or more ambient signals. The first device processes the ambient signals to produce a sound-object sonic descriptor that has metadata describing a sound object within an acoustic environment. The first device transmits, over a communication data link, the speech signal and the descriptor to a second electronic device that is configured to spatially reproduce the sound object using the descriptor mixed with the speech signal, to produce several mixed signals to drive several speakers.

公开(公告)号：US20210366500A1

公开(公告)日：2021-11-25

申请号：US17338431

申请日：2021-06-03

申请人： Dolby International AB

发明人： Lars VILLEMOES ,  Per HEDELIN

IPC分类号： G10L19/26 ,  G10L19/02 ,  G10L21/0388

摘要： The present invention relates to audio coding systems which make use of a harmonic transposition method for high frequency reconstruction (HFR). A system and a method for generating a high frequency component of a signal from a low frequency component of the signal is described. The system comprises an analysis filter bank providing a plurality of analysis subband signals of the low frequency component of the signal. It also comprises a non-linear processing unit to generate a synthesis subband signal with a synthesis frequency by modifying the phase of a first and a second of the plurality of analysis subband signals and by combining the phase-modified analysis subband signals. Finally, it comprises a synthesis filter bank for generating the high frequency component of the signal from the synthesis subband signal.

公开(公告)号：US20210295853A1

公开(公告)日：2021-09-23

申请号：US17339270

申请日：2021-06-04

申请人： Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

发明人： Sascha DISCH ,  Frederik NAGEL ,  Ralf GEIGER ,  Balaji Nagendran THOSHKAHNA ,  Konstantin SCHMIDT ,  Stefan BAYER ,  Christian NEUKAM ,  Bernd EDLER ,  Christian HELMRICH

IPC分类号： G10L19/008 ,  G10L21/0388 ,  G10L19/025 ,  G10L19/03 ,  G10L19/02 ,  G10L19/022 ,  G10L19/032 ,  G10L19/06 ,  G10L25/06 ,  H04S1/00

摘要： An apparatus for decoding an encoded audio signal, includes: a spectral domain audio decoder for generating a first decoded representation of a first set of first spectral portions being spectral prediction residual values; a frequency regenerator for generating a reconstructed second spectral portion using a first spectral portion of the first set of first spectral portions, wherein the reconstructed second spectral portion additionally includes spectral prediction residual values; and an inverse prediction filter for performing an inverse prediction over frequency using the spectral residual values for the first set of first spectral portions and the reconstructed second spectral portion using prediction filter information included in the encoded audio signal.

公开(公告)号：US11120816B2

公开(公告)日：2021-09-14

申请号：US15362147

申请日：2016-11-28

申请人： Board of Regents, The University of Texas System

发明人： Eric A. Freudenthal ,  Eric M. Hanson ,  Bryan E. Usevitch

IPC分类号： G10L21/0388 ,  H04R1/10 ,  G10L21/034 ,  G10H1/44 ,  G09B15/00

摘要： Methods and systems for assisting tonally-challenged singers. A microphone can be integrated with a sound reinforcement system used in a live performance. The microphone, which can transduce the performer's voice, can serve multiple purposes such as, for example, to feed input to the natural ear and to the sound reinforcement system. The processed sound of the performer's voice (with fundamental frequencies emphasized) can be mixed into the signal fed to a stage “monitor” speaker facing the performer or a headset worn by the performer.

公开(公告)号：US11087771B2

公开(公告)日：2021-08-10

申请号：US16452912

申请日：2019-06-26

申请人： QUALCOMM Incorporated

发明人： Venkatraman Atti ,  Venkata Subrahmanyam Chandra Sekhar Chebiyyam

IPC分类号： G10L19/008 ,  G10L21/0388 ,  G10L19/04 ,  G10L19/02

摘要： A device includes an encoder and a transmitter. The encoder is configured to generate a first high-band portion of a first signal based on a left signal and a right signal. The encoder is also configured to generate a set of adjustment gain parameters based on a high-band non-reference signal. The high-band non-reference signal corresponds to one of a left high-band portion of the left signal or a right high-band portion of the right signal as a high-band non-reference signal. The transmitter is configured to transmit information corresponding to the first high-band portion of the first signal. The transmitter is also configured to transmit the set of adjustment gain parameters corresponding to the high-band non-reference signal.

公开(公告)号：US20210074313A1

公开(公告)日：2021-03-11

申请号：US16952339

申请日：2020-11-19

申请人： Samsung Electronics Co., Ltd.

发明人： Cheheung KIM ,  Sungchan KANG ,  Sangha PARK ,  Yongseop YOON ,  Choongho RHEE ,  Hyeokki HONG

IPC分类号： G10L21/0388 ,  H03G5/16 ,  G10L21/0232

摘要： Sound signal processing apparatuses and methods of operating the same are provided. The sound signal processing apparatus includes: a band separator configured to separate sound signals into frequency bands; an adder configured to add sound signals; and a signal processor that is arranged between the band separator and the adder and comprises a plurality of signal processing blocks. The band separator includes elements for separating the sound signals into frequency bands, and the elements correspond one to one to the signal processing blocks.

公开(公告)号：US10924859B2

公开(公告)日：2021-02-16

申请号：US16983780

申请日：2020-08-03

申请人： PPIP LLC

发明人： Michael Fong ,  Neric Hsin-wu Fong ,  Teddy David Thomas

IPC分类号： H04R5/04 ,  H04R3/04 ,  H04R3/12 ,  H04R3/00 ,  G10L21/0232 ,  G10L21/0388

摘要： In accordance with some embodiments, an apparatus for privacy protection is provided. The apparatus includes an audio output device arranged to output sound directed to an audio input device of a second device. The apparatus further includes an audio coupling interface arranged to provide a cavity for the audio output device and the audio input device of the second device. The apparatus also includes a spectral shaper, coupled to the audio output device, operable to apply a spectral envelope to an audio signal in order to produce a shaped audio signal, wherein the shaped audio signal is selectively coupled to the audio output device.