Dolby Laboratories Licensing Corporation

Dolby International Ab

Brett Graham Crockett

Alan Jeffrey Seefeldt

C Phillip Brown

Michael John Smithers

Sripal S Mehta

Joshua Brandon Lando

Stewart Murrie

Christophe Chabanne

Spencer Hooks

Charles Quito Robinson

Brad Basler

Louis Dunn Fielder

Rhonda J Wilson

Giulio Cengarle

Claus Bauer

Nicolas R Tsingos

Jeffrey Charles Riedmiller

Antonio Mateos Sole

Michael J Rockwell

Sunil Bharitkar

S Spencer Hooks

Charles Phillip Brown

Mark Tuffy

Dirk Jeroen Breebaart

David S McGrath

Lie Lu

Grant Allen Davidson

Michael Mead Truman

David Matthew Cooper

Matthew Conrad Fellers

Lianwu Chen

Stephen Decker Vernon

Qi Huang

Brian David Link

Matthew Aubrey Watson

Eric Whelan Yeargan

Matthew Chang

Baoli Yan

Patrick Turnmire

Mohammad N Ahmad

Bruce R Jackson

John D Couling

Ryan Michael Friedrich

Michael J Smithers

Phillip C Brown

Jordan Robert Glasgow

Derek Christian Jones

Spencer S Hooks

David Stanley Mcgrath

A system for using an audio watermark to avoid double processing. The decoder inserts the audio watermark during a transient in the audio signal. This avoids the drawbacks of using out-of-band control signals or metadata. The decoder performs detecting a transient in a first audio signal, transforming a portion related to the transient into the frequency domain to compare a first band of the frequency domain data and a second band of the frequency domain data, when the first band is uncorrelated with the second band, the decoder performs processing on the first audio data to generate a second audio data, when the first band is correlated, the first audio data is used as the second audio data without performing any processing.

Audio watermark to indicate post-processing

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.

Audio control using auditory event detection

A method for generating mastered audio content, the method comprising obtaining an input audio content comprising a number, M, of audio signals, obtaining rendered presentation of the input audio content, the rendered presentation comprising a number, M, of audio signals, obtaining a mastered presentation generated by mastering the rendered presentation, comparing the mastered presentation with the rendered presentation to determine one or more indications of differences between the mastered presentation and the rendered presentation, modifying one or more of the audio signals of the input audio content based on the indications of differences to generate the mastered audio content. With this approach, conventional, typically stereo, channel-based mastering tools can be used to provide a mastered version of any input audio content, including object-based immersive audio content.

Presentation independent mastering of audio content

Methods, systems, and computer program products of automatic de-essing are disclosed. An automatic de-esser can be used without manually setting parameters and can perform reliable sibilance detection and reduction regardless of absolute signal level, singer gender and other extraneous factors. An audio processing device divides input audio signals into buffers each containing a number of samples, the buffers overlapping one another. The audio processing device transforms each buffer from the time domain into the frequency domain and implements de-essing as a multi-band compressor that only acts on a designated sibilance band. The audio processing device determines an amount of attenuation in the sibilance band based on comparison of energy level in sibilance band of a buffer to broadband energy level in a previous buffer. The amount of attenuation is also determined based on a zero-crossing rate, as well as a slope and onset of a compression curve.

Audio de-esser independent of absolute signal level

Embodiments are described for rendering spatial audio content through a system that is configured to reflect audio off of one or more surfaces of a listening environment. The system includes an array of audio drivers distributed around a room, wherein at least one driver of the array of drivers is configured to project sound waves toward one or more surfaces of the listening environment for reflection to a listening area within the listening environment and a renderer configured to receive and process audio streams and one or more metadata sets that are associated with each of the audio streams and that specify a playback location in the listening environment.

Speaker for reflecting sound off viewing screen or display surface

Embodiments are described for a system of rendering object-based audio content through a system that includes individually addressable drivers, including at least one driver that is configured to project sound waves toward one or more surfaces within a listening environment for reflection to a listening area within the listening environment; a renderer configured to receive and process audio streams and one or more metadata sets associated with each of the audio streams and specifying a playback location of a respective audio stream; and a playback system coupled to the renderer and configured to render the audio streams to a plurality of audio feeds corresponding to the array of audio drivers in accordance with the one or more metadata sets.

System for rendering and playback of object based audio in various listening environments

Embodiments are directed to upward-firing speakers that reflect sound off a ceiling to a listening location at a distance from a speaker. The reflected sound provides height cues to reproduce audio objects that have overhead audio components. A virtual height filter based on a directional hearing model is applied to the upward-firing driver signal to improve the perception of height for audio signals transmitted by the virtual height speaker to provide optimum reproduction of the overhead reflected sound. The upward firing driver is tilted at an inclination angle of approximately 20 degrees to the horizontal axis of the speaker and separate height and direct terminal connections are provided to interface to an adaptive audio rendering system.

Audio speakers having upward firing drivers for reflected sound rendering

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Brisbane, CA, United States of America

Brett Graham Crockett