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Upmixing object based audio

An object, audio technology, applied in the field of upmixing object-based audio, which can solve the problems of distortion, perceptual discrete loss, etc.

Active Publication Date: 2014-03-19
DOLBY LAB LICENSING CORP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Even if the conventional phase / amplitude based technique of upmixing an audio program containing speaker channels (to produce an upmixed program with more speaker channels than the input program) is applied to object-based audio programs somehow ( to generate loudspeaker feeds for more loudspeakers than can be generated from an un-upmixed input program), which also results in a loss of perceptual discreteness (of the audio objects indicated by the up-mixed program) and / or would generate the above type of distortion

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Examples

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Embodiment Construction

[0059] Example embodiments relate to a system and method that implements a type of audio coding known as audio object coding (or object-based coding or "scene description"), and works under the following assumptions: (output by an encoder) Each audio program can be presented for reproduction by any of a number of different loudspeaker arrays. Each audio program output by such an encoder is an object-based audio program, and typically each channel of such an object-based audio program is an object channel. In audio object coding, audio signals associated with different sound sources (audio objects) are fed into the encoder as separate audio streams. Examples of audio objects include (but are not limited to) dialogue tracks, single instruments, and jets. Each audio object is associated with spatial parameters, which may include, but are not limited to, source position, source width, and source velocity and / or source trajectory. Encode audio objects and related parameters for d...

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Abstract

In some embodiments, a method for rendering an object based audio program indicative of a trajectory of an audio source, including by generating speaker feeds for driving loudspeakers to emit sound intended to be perceived as emitting from the source, but with the source having a different trajectory than that indicated by the program. In other embodiments, a method for modifying (upmixing) an object based audio program indicative of a trajectory of an audio object within a subspace of a full volume, to determine a modified program indicative of a modified trajectory of the object such that at least a portion of the modified trajectory is outside the subspace. Other aspects include a system configured to perform, and a computer readable medium which stores code for implementing, any embodiment of the inventive method.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Provisional Application No. 61 / 504,005, filed July 1, 2011, and U.S. Provisional Application No. 61 / 635,930, filed April 20, 2012, the entire contents of which are incorporated by reference for all purposes incorporated into this article. technical field [0003] The present invention relates to systems and methods for upmixing (or otherwise modifying audio object trajectories determined by object-based audio) object-based audio (i.e., audio data representing an object-based audio program) to Modified data (ie, data representing a modified version of the audio program) is generated from which a plurality of speaker feeds can be generated. In some embodiments, the invention is a system and method for rendering object-based audio, including by performing upmixing on the object-based audio to generate speaker feeds for driving a loudspeaker array. Background technique [0004] Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S3/00
CPCH04S2400/11H04S7/30H04S3/002H04R5/02
Inventor 克里斯托夫·夏巴纳查尔斯·Q·鲁宾逊
Owner DOLBY LAB LICENSING CORP
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