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Audio channel extraction using inter-channel amplitude spectra

An amplitude spectrum, channel technique, applied to the inter-channel amplitude spectrum to perform extraction field

Inactive Publication Date: 2009-04-08
DTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Current ICA technology cannot support this

Method used

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  • Audio channel extraction using inter-channel amplitude spectra
  • Audio channel extraction using inter-channel amplitude spectra
  • Audio channel extraction using inter-channel amplitude spectra

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Embodiment Construction

[0019] The present invention provides a method for extracting multiple audio channels from two or more audio input channels including a mix of audio sources, and more specifically, relates to the use of inter-channel amplitude spectrum to perform the extraction. This method produces multiple audio channels that are not just a linear combination of input channels, and therefore can be used in combination with blind source separation (BSS) algorithms or to provide additional channels directly for various remixing applications, for example.

[0020] Merely as an exemplary embodiment, the extraction technique is described in the case where it uses the BSS algorithm. As mentioned above, for the BSS algorithm used to extract Q original audio sources from a mixture of these sources, it must receive as input at least Q linearly independent audio channels that convey the mixture. As shown in FIG. 1, M audio input channels 10 are input to the channel extractor 12, and the channel extractor ...

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Abstract

Inter-channel amplitude spectra are used to extract multiple audio channels from two or more audio input channels comprising a mix of audio sources. This approach produces multiple audio channels that are not merely linear combinations of the input channels, and thus can then be used, for example, in combination with a blind source separation (BSS) algorithm.

Description

Technical field [0001] The present invention relates to the extraction of multiple audio channels from a mixture of two or more audio input channels including audio sources, and more specifically, to the use of inter-channel amplitude spectra to perform the extraction. Background technique [0002] Blind Source Separation (BSS) is a type of method that is widely used in the field where each original audio source needs to be estimated from a stereo channel that transmits a linear mixture of each source. The difficulty in separating each original source from the linear mixture of each original source is that in many practical applications, little is known about the original signal or the way to mix them. In order to achieve blind de-mixing, certain assumptions about the statistical characteristics of the signal are usually made. [0003] Independent component analysis (ICA) is a method and perhaps the most widely used method for performing blind source separation. ICA assumes that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/00G10L19/00G10L21/0272G10L21/028G10L21/0308
CPCH04S5/005G10L19/008H04S2420/03G10L21/0272G10L19/02
Inventor P·丘巴列夫
Owner DTS