公开(公告)号：US09712939B2

公开(公告)日：2017-07-18

申请号：US14908094

申请日：2014-06-17

Applicant: DOLBY INTERNATIONAL AB ,  DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Antonio Mateos Sole ,  Giulio Cengarle ,  Dirk Jeroen Breebart ,  Nicolas R. Tsingos

IPC: H04R5/02 ,  H04S7/00

CPC classification number: H04S7/30 ,  H04S2400/03 ,  H04S2400/11

Abstract: A gain contribution of the audio signal for each of the N audio objects to at least one of M speakers may be determined. Determining the gain contribution may involve determining a center of loudness position that is a function of speaker (or cluster) positions and gains assigned to each speaker (or cluster). Determining the gain contribution also may involve determining a minimum value of a cost function. A first term of the cost function may represent a difference between the center of loudness position and an audio object position.

公开(公告)号：US09712916B2

公开(公告)日：2017-07-18

申请号：US14992938

申请日：2016-01-11

Applicant: DTS LLC

Inventor： Themis Katsianos ,  Oveal Jerome Walker

IPC: H03G3/00 ,  H04R3/04 ,  H03G3/30 ,  H03G9/00 ,  H03G9/02 ,  H04S1/00 ,  H04S7/00

CPC classification number: H04R3/04 ,  H03G3/00 ,  H03G3/3005 ,  H03G3/3089 ,  H03G9/005 ,  H03G9/025 ,  H04R2430/01 ,  H04S1/002 ,  H04S7/307 ,  H04S2400/03

Abstract: A bass enhancement system can provide an enhanced bass effect for speakers, including relatively small speakers. The bass enhancement system can apply one or more bass enhancements to an input audio signal. For example, the bass enhancement system can exploit how the human ear processes overtones and harmonics of low-frequency sounds to create the perception that non-existent (or attenuated) low-frequency sounds are being emitted from a loudspeaker. The bass enhancement system can generate harmonics of at least some low-frequency fundamental frequencies in one embodiment. Playback of at least some harmonics of a low-frequency fundamental frequency can cause a listener to perceive the playback of the low-frequency fundamental frequency. Advantageously, in certain embodiments, the bass enhancement system can generate these harmonics without performing processing-intensive pitch-detection techniques or the like to identify the fundamental frequencies.

公开(公告)号：US20170195817A1

公开(公告)日：2017-07-06

申请号：US14985299

申请日：2015-12-30

Applicant: Knowles Electronics LLC

Inventor： Kuan-Chieh Yen

IPC: H04S7/00 ,  H04R5/033 ,  H04S1/00 ,  G06F3/16

CPC classification number: H04S7/304 ,  G06F3/165 ,  G10L21/0272 ,  G10L25/78 ,  G10L2021/02087 ,  H04R1/1016 ,  H04R5/033 ,  H04R2201/107 ,  H04R2420/07 ,  H04S7/30 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2400/15 ,  H04S2420/01

Abstract: Systems and methods for simultaneous binaural presentation of multiple audio streams are provided. An example method includes receiving a first audio stream and at least one second audio stream. The first audio stream is associated with a first direction and the at least one second audio stream is associated with at least one second direction. The at least one second direction is set at an angle with respect to the first direction. A first acoustic sound is generated such that it may be perceived as the first audio stream coming from the first direction. An at least one second acoustic sound is generated such that it may be perceived as the at least one second audio stream coming from the at least one second direction. The first acoustic sound and the at least one second acoustic sound are blended into a third acoustic sound to be presented to a listener.

公开(公告)号：US20170180906A1

公开(公告)日：2017-06-22

申请号：US15372802

申请日：2016-12-08

Applicant: QUALCOMM Incorporated

Inventor： Venkata Subrahmanyam Chandra Sekhar Chebiyyam ,  Venkatraman Atti

IPC: H04S7/00

CPC classification number: H04S7/307 ,  G10L19/008 ,  H04S1/00 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2400/15 ,  H04S2420/03

Abstract: A method of non-causally shifting a channel includes estimating comparison values at an encoder. Each comparison value is indicative of an amount of temporal mismatch between a previously captured reference channel and a corresponding previously captured target channel. The method also includes smoothing the comparison values to generate smoothed comparison values based on historical comparison value data and a smoothing parameter. The method further includes estimating a tentative shift value based on the smoothed comparison values. The method also includes non-causally shifting a target channel by a non-causal shift value to generate an adjusted target channel that is temporally aligned with a reference channel. The non-causal shift value is based on the tentative shift value. The method further includes generating, based on reference channel and the adjusted target channel, at least one of a mid-band channel or a side-band channel.

公开(公告)号：US20170180903A1

公开(公告)日：2017-06-22

申请号：US15366470

申请日：2016-12-01

Applicant: THOMSON LICENSING

Inventor： Alexey Ozerov ,  Marie Guegan ,  Quang Khanh Ngoc Duong

IPC: H04S3/02 ,  G10L19/008 ,  G10L25/21

CPC classification number: H04S3/02 ,  G10L19/008 ,  G10L21/00 ,  G10L21/02 ,  G10L25/21 ,  H04S2400/03 ,  H04S2420/07

Abstract: A method and apparatus for processing audio content is described. The method and apparatus include receiving (510) audio content, the audio content including an input audio signal, a first reference audio signal, and a second reference audio signal, determining (550) a processing function for the input audio signal, the processing function determined based on a cost function between the input audio signal, the first reference audio signal and a second reference audio signal, and processing (560) the input audio signal using the determined processing function in order to produce an output audio signal.

公开(公告)号：US09679571B2

公开(公告)日：2017-06-13

申请号：US14783767

申请日：2014-04-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Kwon Beack ,  Tae Jin Lee ,  Jong Mo Sung ,  Jeong Il Seo ,  Kyeong Ok Kang ,  Dae Young Jang ,  Jin Woong Kim

IPC: G10L19/02 ,  G10L19/008 ,  H04S3/00

CPC classification number: G10L19/008 ,  H04S3/008 ,  H04S2400/03

Abstract: An encoder and an encoding method for a multi-channel signal, and a decoder and a decoding method for a multi-channel signal are disclosed. A multi-channel signal may be efficiently processed by consecutive downmixing or upmixing.

公开(公告)号：US09666198B2

公开(公告)日：2017-05-30

申请号：US14893377

申请日：2014-05-23

Applicant: DOLBY INTERNATIONAL AB

Inventor： Toni Hirvonen ,  Heiko Purnhagen ,  Leif Jonas Samuelsson ,  Lars Villemoes

IPC: G10L19/008 ,  H04S5/00 ,  H04S7/00 ,  G10L19/20 ,  G10L19/02 ,  G10L25/06 ,  H04S3/00 ,  H04S3/02

CPC classification number: G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  G10L25/06 ,  H04S3/008 ,  H04S3/02 ,  H04S5/00 ,  H04S7/30 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/03

Abstract: Audio objects are associated with positional metadata. A received downmix signal comprises downmix channels that are linear combinations of one or more audio objects and are associated with respective positional locators. In a first aspect, the downmix signal, the positional metadata and frequency-dependent object gains are received. An audio object is reconstructed by applying the object gain to an upmix of the downmix signal in accordance with coefficients based on the positional metadata and the positional locators. In a second aspect, audio objects have been encoded together with at least one bed channel positioned at a positional locator of a corresponding downmix channel. The decoding system receives the downmix signal and the positional metadata of the audio objects. A bed channel is reconstructed by suppressing the content representing audio objects from the corresponding downmix channel on the basis of the positional locator of the corresponding downmix channel.

公开(公告)号：US20170134873A1

公开(公告)日：2017-05-11

申请号：US15323028

申请日：2015-07-01

Applicant: Electronics & Telecommunications Research Institute

Inventor： Seung Kwon BEACK ,  Jeong Il SEO ,  Jong Mo SUNG ,  Tae Jin LEE ,  Dae Young JANG ,  Jin Woong KIM

IPC: H04S3/00 ,  G10L19/20 ,  G10L19/008

CPC classification number: H04S3/008 ,  G10L19/008 ,  G10L19/0204 ,  G10L19/20 ,  H04S2400/03 ,  H04S2400/07

Abstract: Disclosed are a multi-channel audio signal processing method and a multi-channel audio signal processing apparatus. The multi-channel audio signal processing method may generate N channel output signals from N/2 channel downmix signals based on an N-N/2-N structure.

公开(公告)号：US09648439B2

公开(公告)日：2017-05-09

申请号：US14774943

申请日：2014-03-11

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Richard J. Cartwright ,  David S. McGrath ,  Glenn N. Dickins

IPC: H04R5/02 ,  H04S7/00 ,  H04M3/56

CPC classification number: H04S1/005 ,  H04M3/568 ,  H04S7/30 ,  H04S7/304 ,  H04S2400/01 ,  H04S2400/03 ,  H04S2400/11 ,  H04S2420/01 ,  H04S2420/11

Abstract: A computer implemented system for rendering captured audio soundfields to a listener (4) comprises apparatus (10) to deliver the audio soundfields to the listener (4). The delivery apparatus (10) delivers the audio soundfields to the listener (4) with first and second audio elements perceived by the listener (4) as emanating from first and second virtual source locations (1), respectively, and with the first audio element and/or the second audio element delivered to the listener (4) from a third virtual source location (3). The first virtual source location (1) and the second virtual source location (2) are perceived by the listener (4) as being located to the front of the listener (4), and the third virtual source location (3) is located to the rear or the side of the listener (4).

公开(公告)号：US09646619B2

公开(公告)日：2017-05-09

申请号：US14916176

申请日：2014-09-08

Applicant: DOLBY INTERNATIONAL AB

Inventor： Heiko Purnhagen ,  Harald Mundt ,  Kristofer Kjoerling

IPC: H04S5/00 ,  G10L19/008 ,  G10L19/24 ,  G10L19/02

CPC classification number: G10L19/008 ,  G10L19/02 ,  G10L19/24 ,  H04S5/00 ,  H04S2400/03 ,  H04S2420/03

Abstract: There are provided decoding and encoding methods for encoding and decoding of multichannel audio content for playback on a speaker configuration with N channels. The decoding method comprises decoding, in a first decoding module, M input audio signals into M mid signals which are suitable for playback on a speaker configuration with M channels; and for each of the N channels in excess of M channels, receiving an additional input audio signal corresponding to one of the M mid signals and decoding the input audio signal and its corresponding mid signal so as to generate a stereo signal including a first and a second audio signal which are suitable for playback on two of the N channels of the speaker configuration.