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Upmixing method of audio signals

An audio signal and audio technology, applied in the field of audio signal processing, can solve the problems of inability to create a strong enough spatial immersive audio experience, signal defects, etc., and achieve the effect of natural and immersive spatial experience

Active Publication Date: 2016-10-05
DOLBY LAB LICENSING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, traditional upmixing solutions sometimes fail to create a sufficiently spatially immersive audio experience and can even cause audible artifacts in the upmixed signal

Method used

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  • Upmixing method of audio signals
  • Upmixing method of audio signals
  • Upmixing method of audio signals

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Embodiment Construction

[0019] The principles of the invention will be described below with reference to several example embodiments shown in the accompanying drawings. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and implement the present invention, but not to limit the scope of the present invention in any way.

[0020] As used herein, the term "comprising" means an open inclusion, ie "including but not limited to". The term "or" means "and / or" unless expressly stated otherwise. The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment." The term "another embodiment" means "at least one further embodiment". Definitions of other terms are given in the description below.

[0021] The term "audio object" or simply "object" as used herein refers to an individual audio element present in a sound field for a certain duration. Audio objects can be dynamic or static. For ...

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Abstract

The invention relates to an upmixing method of audio signals. The method includes decomposing the audio signal into a diffuse signal and a direct signal; generating an audio bed, which includes a height channel, at least in part based on the diffuse signal; extracting an audio object from the direct signal; estimating metadata, including height information of the audio object, of the audio object; and rendering the audio bed and the audio object as an upmixed audio signal, wherein the audio bed is rendered to a predefined position and the audio object is rendered according to the metadata. Corresponding system and computer program product are described as well.

Description

technical field [0001] The present invention relates generally to audio signal processing, and more particularly to upmixing of audio signals. Background technique [0002] To create a more immersive audio experience, upmixing can be applied to the audio signal to create additional surround channels from the original audio signal, for example from stereo to surround 5.1 or from surround 5.1 to surround 7.1, wait. Several upmixers and upmixing algorithms exist. In these traditional upmixing algorithms, the additional surround channels created are only for the floor speakers. To further improve spatial immersion, some upmixing algorithms have been proposed to upmix audio signals to overhead (overhead) speakers, such as from surround 5.1 to surround 7.1.2 formats, where ".2" indicates the number of overhead speakers. [0003] Traditional upmixing schemes usually only upmix the diffuse or ambient signal in the original audio signal to the tweeters, leaving the direct signal i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S7/00
CPCH04S2400/11H04S3/008H04S5/00H04S5/005H04R1/323H04S7/308
Inventor 王珺芦烈陈连武胡明清
Owner DOLBY LAB LICENSING CORP