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Multi-channel audio processing method and device

A processing method and multi-channel technology, applied in speech analysis, stereo system, instrument, etc., can solve problems such as missing spectrum, no solution proposed, location information not preserved, etc., and achieve the effect of solving information loss

Active Publication Date: 2020-08-04
TENCENT TECH (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the formula that the ITU standard Down Mix technical scheme only performs simple weighting processing on the input data of the channel, and completely ignores the influence of the LFE channel during the processing.
Especially when the user uses headphones for sound playback, the left channel does not have the surround data of the right channel at all, and the right channel also does not have the surround data of the left channel, and the position information of the input channel data is not preserved.
[0006] The use of HRTF virtual speaker technology takes into account the influence of multiple channels on the head correlation function of channel output. In this virtual speaker technology, the fixed weights are converted into HRTF coefficients with spatial and temporal characteristics, but due to The measurement of the coefficient of the HRTF function is done in a strict anechoic room, and the use of this coefficient will lead to missing spectrum
[0007] For the above-mentioned problem of information loss in down-channel processing of multi-channel audio files, no effective solution has been proposed yet

Method used

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Embodiment 1

[0027] According to an embodiment of the present invention, a method embodiment of a multi-channel audio processing method is provided.

[0028] Optionally, in this embodiment, the above multi-channel audio processing method may be applied to figure 1 In the hardware environment constituted by the server 102 and the terminal 104 as shown. Such as figure 1 As shown, the server 102 is connected to the terminal 104 through a network. The above-mentioned network includes but not limited to: a wide area network, a metropolitan area network or a local area network. The terminal 104 is not limited to a PC, a mobile phone, a tablet computer, and the like. The method for processing multi-channel audio in this embodiment of the present invention may be executed by the server 102, may also be executed by the terminal 104, and may also be executed jointly by the server 102 and the terminal 104. Wherein, the multi-channel audio processing method of the embodiment of the present invention...

Embodiment 2

[0098] According to an embodiment of the present invention, a processing device for implementing the above multi-channel audio processing method is also provided. Figure 5 is a schematic diagram of an optional multi-channel audio processing device according to an embodiment of the present invention, Figure 6 is a schematic diagram of another optional multi-channel audio processing device according to an embodiment of the present invention, such as Figure 5 and Figure 6 As shown, the device may include:

[0099] The first determination unit 51 is configured to determine the output channel of the multi-channel audio;

[0100] An acquisition unit 53, configured to acquire a plurality of channel data of the multi-channel audio and a plurality of channel data corresponding to the orientation data of the output channel when the number of output channels is less than the number of channels of the multi-channel audio;

[0101] The correction unit 55 is used to correct the azimu...

Embodiment 3

[0133] According to an embodiment of the present invention, a server or a terminal for implementing the above multi-channel audio processing method is also provided.

[0134] Figure 7 is a structural block diagram of a terminal according to an embodiment of the present invention, such as Figure 7 As shown, the terminal may include: one or more (only one is shown in the figure) processor 201, memory 203, and transmission device 205 (such as the sending device in the above-mentioned embodiment), such as Figure 7 As shown, the terminal may also include an input and output device 207 .

[0135] Wherein, the memory 203 can be used to store software programs and modules, such as program instructions / modules corresponding to the multi-channel audio processing method and device in the embodiment of the present invention, and the processor 201 can run the software programs and modules stored in the memory 203 , so as to perform various functional applications and data processing, ...

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Abstract

The invention discloses a multi-channel audio processing method and a multi-channel audio processing device. The multi-channel audio processing method comprises the following steps: determining to-be-output output channels of multi-channel audio; when the number of the output channels is smaller than the number of the sound channels of the multi-channel audio, acquiring multiple sound channel data of the multi-channel audio and azimuth data, corresponding to the output channels, of the multiple sound channel data; correcting the azimuth data, and thus corrected data is obtained for supplementing the lost data in the azimuth data; and determining the output data of the output channels based on the corrected data and the multiple sound channel data. With the adoption of the method and the device, the technical problem that information loss is caused when channel-decreasing treatment is carried out on the multi-channel audio file is solved.

Description

technical field [0001] The present invention relates to the field of audio processing, in particular to a multi-channel audio processing method and device. Background technique [0002] Many audio files in the prior art are multi-channel audio files. Multi-channel audio files are generally played by a multi-channel audio playback system. Usually, multi-channel audio refers to more than two channels. audio. For example, 5.1 multi-channel audio refers to surround sound with five basic channels (left, center, right, left surround, and right surround) and one subwoofer LFE channel. sound system. [0003] However, some players in the prior art do not have multi-channel equipment. When these players do not have multi-channel equipment, when playing multi-channel audio, the following two methods are usually used to down-channel: adopt the Down Mix of the ITU standard; Adopt HRTF virtual speaker technology. The following takes 5.1 channel as an example for illustration: [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/008H04S3/00
CPCG10L19/008H04S3/008
Inventor 杨将
Owner TENCENT TECH (SHENZHEN) CO LTD
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