Method for parametric spatial audio coding and decoding, parametric spatial audio coder and parametric spatial audio decoder

A spatial audio coding and spatial coding technology, which is applied to instruments, speech analysis, stereo systems, etc., can solve problems such as bit rate limitations, and achieve the effect of bit rate reduction

Active Publication Date: 2014-01-01
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] Due to the limited bit rate of the parametric audio coding scheme, sometimes there are not enough bits in the parametric section of the audio bitstream to transmit all the ILD, ITD, IPD and ICC values

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  • Method for parametric spatial audio coding and decoding, parametric spatial audio coder and parametric spatial audio decoder
  • Method for parametric spatial audio coding and decoding, parametric spatial audio coder and parametric spatial audio decoder

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Embodiment Construction

[0042] In the following detailed description, reference is made to the accompanying drawings, and specific embodiments are shown by way of illustration. It is to be understood that other embodiments may be utilized and various structural or logical changes may be made without departing from the scope of the present invention. Unless otherwise stated, the functions, principles and details of each embodiment can be combined with other embodiments. In general, this application is intended to cover any adaptations or variations of the specific embodiments discussed herein. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present invention is defined by the appended claims.

[0043] Embodiments may include various methods and procedures that may be implemented within machine-readable instructions provided by a machine-readable medium, including, but not limited to, a computer capable of storing information accessible by D...

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Abstract

A method for parametric spatial audio coding of a multi-channel audio signal comprising a plurality of audio channel signals is provided, the method comprising: calculating at least two different spatial coding parameters for an audio channel signal of the plurality of audio channel signals, wherein the at least two different spatial coding parameters are of at least two different types of spatial coding parameters and are calculated with regard to a reference audio signal, wherein the reference audio signal is another audio channel signal of the plurality of audio channel signals or a downmix audio signal derived from at least two audio channel signals of the plurality of audio channel signals; selecting at least one spatial coding parameter of the at least two different spatial coding parameters associated with the audio channel signal on the basis of the values of the calculated spatial coding parameters; including a quantized representation of the selected spatial coding parameter into a parameter section (1b) of an audio bitstream (1); and setting a parameter type flag in the parameter section (1b) of the audio bitstream (1) indicating the type of the selected spatial coding parameter being included into the audio bitstream (1).

Description

technical field [0001] The invention relates to a method of parametric spatial audio coding and decoding of multi-channel audio signals, a parametric spatial audio encoder and a parametric spatial audio decoder for such signals. Background technique [0002] For parametric multi-channel audio coding, see Proc. IEEE Workshop on Appl. of Sig.Proc.to Proc. IEEE Workshop on Appl. of Sig.Proc.to Audio and Acoust., Oct.2001, pp.199-202), Faller C. and Baumgarte F. "Efficient representation of spatial audio using perceptual parameterization audio using perceptual parametrization)". The downmixed audio signal can be subjected to an upmixing operation to synthesize a multi-channel audio signal, which can be achieved by using spatial cues to generate more output audio channels than is the case for the downmixed audio signal. Typically, the downmix audio signal results from the superposition of multiple audio channel signals of a multi-channel audio signal, such as a stereo audio sig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/008H04S3/00
CPCH04S3/00G10L19/008
Inventor 大卫·维雷特郎玥许剑峰
Owner HUAWEI TECH CO LTD
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