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Method and device for encoding/decoding multi-channel audio signals

A technology of audio signal and audio decoder, which is applied in the direction of speech analysis and instrumentation, and can solve the problem of limited bandwidth of the transmission channel

Active Publication Date: 2016-06-08
HONOR DEVICE CO LTD
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  • Application Information

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Problems solved by technology

In most cases, the bandwidth of the transmission channel is very limited, only allowing the transmission of the downmix signal and the corresponding spatial parameters (SP) at a very low bit rate

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  • Method and device for encoding/decoding multi-channel audio signals
  • Method and device for encoding/decoding multi-channel audio signals
  • Method and device for encoding/decoding multi-channel audio signals

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Embodiment Construction

[0054] figure 1 For an overview of the audio system 1, at least one multi-channel audio encoder 2 and a multi-channel audio decoder 3 derived according to an aspect of the invention are shown, wherein the multi-channel audio encoder 2 and the multi-channel audio decoding Transmitter 3 is connected via transmission channel 4. from figure 1 It can be seen that the multi-channel audio encoder 2 will receive the multi-channel audio signal S. The multi-channel audio encoder 2 includes a down-mixing signal generating unit for generating a down-mixing signal S for the received multi-channel audio signal S D ; and a spatial parameter extraction unit for extracting the spatial parameter SP.

[0055] In a possible embodiment, the spatial parameter extraction unit will firstly process the multi-channel input audio signal S, and then encode the extracted spatial parameters SP respectively, and at the same time, use an audio encoder to process the generated downmix signal S D to encode...

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Abstract

Method and apparatus for encoding / decoding multi-channel audio signals. The method and apparatus for decoding a multi-channel audio signal include the following steps: (S41) receiving a downmixed audio signal and inter-channel cross-correlation parameters; (S42) receiving inter-channel cross-correlation parameters (ICCi) Obtain an inter-channel phase difference parameter (IPDi); (S43) calculate a decoded multi-channel audio signal for the received downmix signal (SD) according to the obtained inter-channel phase difference parameter (IPDi).

Description

technical field [0001] The present invention relates to the field of multi-channel audio signal coding / decoding, in particular to the field of parametric spatial audio coding / decoding (also called parametric multi-channel audio coding / decoding). Background technique [0002] Multi-channel audio coding is based on the extraction and quantization of parametric representations of spatial images of multi-channel audio signals. The encoder transmits these spatial parameters to the decoder along with the generated downmix signal. In the decoder, the received multi-channel audio signal is reconstructed from the decoded downmix signal and the received spatial parameters (comprising the spatial information of the multi-channel audio signal). In spatial audio coding, the spatial image of a multichannel audio signal is captured into a compact set of spatial parameters that can be used to synthesize a high-quality multichannel representation from the transmitted downmix signal. During...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/008G10L19/00
CPCG10L25/06G10L19/008
Inventor 大卫·维雷特郎玥许剑峰
Owner HONOR DEVICE CO LTD