Dolby Laboratories Licensing Corporation

Dolby International Ab

Other

Sony Corporation

Seaboard Digital Systems, Inc.

Mark Franklin Davis

Craig C Todd

C Phillip Brown

Rhonda J Wilson

David Matthew Cooper

Dirk Jeroen Breebaart

Nicolas R Tsingos

Louis Dunn Fielder

Ray M Dolby

Douglas E Mandell

Alan Jeffrey Seefeldt

Grant Allen Davidson

Joshua Brandon Lando

Matthew Conrad Fellers

Stephen Decker Vernon

Kristofer Kjoerling

Martin John Richards

David S McGrath

Charles Quito Robinson

Harald Mundt

Paul R Goldberg

Ioan R Allen

Mark Leighton Atherton

Kenzo Akagiri

Mark Stuart Vinton

Antonio Mateos Sole

Regunathan Radhakrishnan

Vinay Melkote

Giulio Cengarle

Kuan-Chieh Yen

Sunil Bharitkar

Brian David Link

Antonio L Elias

David S Mcgrath

Louise D Fielder

Grant A Davidson

Matthew Fellers

Phillip C Brown

An apparatus and method of rendering audio. A binaural signal is split on an amplitude weighting basis into a front binaural signal and a rear binaural signal, based on perceived position information of the audio. In this manner, the front-back differentiation of the binaural signal is improved.

Rendering binaural audio over multiple near field transducers

A system and method of modifying a binaural signal using headtracking information. The system calculates a delay, a first filter response, and a second filter response, and applies these to the left and right components of the binaural signal according to the headtracking information. The system may also apply headtracking to parametric binaural signals. In this manner, headtracking may be applied to pre-rendered binaural audio.

Headtracking for pre-rendered binaural audio

The present invention is directed to methods and apparatus for translating a first plurality of audio input channels to a second plurality of audio output channels. This includes determining that there is pair-wise coding among any of the first plurality of audio input channels, determining an input/output-mapping matrix for mapping at least a first set of the first plurality of audio input channels to at least a second set of the second plurality of audio output channels; and deriving the second plurality of audio output channels based on first plurality of audio input channels, the input/output-mapping matrix and the determined pair-wise coding. The first plurality of audio input channels represent the same soundfield represented by the second plurality of audio output channels.

Audio channel spatial translation

A method performed in an audio decoder for decoding M encoded audio channels representing N audio channels is disclosed. The method includes receiving a bitstream containing the M encoded audio channels and a set of spatial parameters, decoding the M encoded audio channels, and extracting the set of spatial parameters from the bitstream. The method also includes analyzing the M audio channels to detect a location of a transient, decorrelating the M audio channels, and deriving N audio channels from the M audio channels and the set of spatial parameters. A first decorrelation technique is applied to a first subset of each audio channel and a second decorrelation technique is applied to a second subset of each audio channel. The first decorrelation technique represents a first mode of operation of a decorrelator, and the second decorrelation technique represents a second mode of operation of the decorrelator.

Methods and apparatus for reconstructing audio signals with decorrelation and differentially coded parameters

A method of encoding channel or object based input audio for playback, the method including the steps of: (a) initially rendering the channel or object based input audio into an initial output presentation; (b) determining an estimate of the dominant audio component from the channel or object based input audio and determining a series of dominant audio component weighting factors for mapping the initial output presentation into the dominant audio component; (c) determining an estimate of the dominant audio component direction or position; and (d) encoding the initial output presentation, the dominant audio component weighting factors, the dominant audio component direction or position as the encoded signal for playback.

Headtracking for parametric binaural output system and method

M audio input channels, each associated with a spatial direction, are translated to N audio output channels, each associated with a spatial direction, wherein M and N are positive whole integers, M is three or more, and N is three or more, by deriving the N audio output channels from the M audio input channels, wherein one or more of the M audio input channels is associated with a spatial direction other than a spatial direction with which any of the N audio output channels is associated, and at least one of the one or more of the M audio input channels is mapped to a respective set of at least three of the N output channels. At least three output channels of a set may be associated with contiguous spatial directions.

Methods and apparatus for adjusting a level of an audio signal

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Pacifica, CA, United States of America

Mark Franklin Davis