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Decoding of binaural audio signals

An audio signal, two-channel technology, applied in the field of two-channel audio signal decoding, to achieve the effects of enhanced utilization, simple calculation complexity, and improved efficiency

Inactive Publication Date: 2009-02-11
NOKIA CORP
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Problems solved by technology

Obviously, this method is not optimal from the point of view of generating binaural signals

Method used

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  • Decoding of binaural audio signals
  • Decoding of binaural audio signals
  • Decoding of binaural audio signals

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Embodiment Construction

[0026] Hereinafter, the present invention will be described by referring to Binaural Markup Coding (BCC) as an exemplary platform for implementing a decoding mechanism according to an embodiment. However, it should be understood that the present invention is not limited to BCC-type spatial audio coding methods, but may be implemented in any audio coding mechanism that provides an input from an original set of one or more audio channels and a suitable spatial At least one audio signal formed by combining side information.

[0027] Binaural Contrast Coding (BCC) is a general concept for a parametric representation of spatial audio that delivers a multi-channel output with an arbitrary number of channels from a single audio channel and some side information. figure 1 This principle is shown. Multiple (M) input audio channels are combined into a single output (S; "summed") signal by a downmix process. In parallel, the most salient inter-channel markers describing the multi-chan...

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Abstract

A method for synthesizing a binaural audio signal, the method comprising: inputting a parametrically encoded audio signal comprising at least one combined signal of a plurality of audio channels and one or more corresponding sets of side information describing a multi-channel sound image; and applying a predetermined set of head-related transfer function filters to the at least one combined signal in proportion determined by the corresponding set of side information to synthesize a binaural audio signal. A corresponding parametric audio decoder, parametric audio encoder, computer program product, and apparatus for synthesizing a binaural audio signal are also described.

Description

[0001] related application [0002] This application claims priority to International Application PCT / FI2006 / 050014, filed January 9, 2006, and US Application 11 / 334,041, filed January 17,2006. technical field [0003] The present invention relates to spatial audio coding, and more particularly to the decoding of binaural audio signals. Background technique [0004] In spatial audio coding, a dual / multi-channel audio signal is processed so that the audio signal is reproduced on different audio channels that are different from each other, thereby providing listeners with a sense of the spatial effect around the sound source. The spatial effect can be created by recording the audio directly into a format suitable for multi-channel or binaural reproduction, or the spatial effect can be artificially created with any binaural / multi-channel audio signal, where the spatial effect is known as spatialization. [0005] It is generally known that, for headphone reproduction, artific...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S1/00H04R5/00G10L19/00G10L19/02
CPCH04S2420/01H04S2400/01H04S3/004G10L19/008G10L19/0204H04S3/002G10L19/022G10L19/02H04S2420/03
Inventor P·奥雅拉J·蒂尔屈M·瓦阿纳南
Owner NOKIA CORP
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