CN113689890B - Multi-channel signal conversion method, device and storage medium - Google Patents

Abstract

The present disclosure relates to a method, device and storage medium for converting a multi-channel signal. The method is applied to an electronic device comprising multiple audio output modules, and the method comprises: obtaining the number of channels of an input first audio signal; if the number of channels of the first audio signal is not a preset number of channels, converting the first audio signal into a second audio signal with the preset number of channels; and outputting audio signals of different channels of the second audio signal using different audio output modules.

Description

Multi-channel signal conversion method, device and storage medium

Technical Field

The present disclosure relates to the field of signal processing technology, and in particular to a method, device and storage medium for converting a multi-channel signal.

Background technique

Currently, most handheld electronic devices are limited by the number of audio output modules and can only support stereo, a two-channel format, even if the sound source is multi-channel audio. Generally, multi-channel audio refers to audio with more than two channels. For example, 5.1 multi-channel audio (i.e., 6-channel audio) refers to a surround sound system with 5 basic channels (including left channel, center channel, right channel, left surround channel and right surround channel) and a subwoofer (Low Frequency Effects, LFE) channel; the multi-channel audio also needs to be compressed into two-channel audio before it can be played.

As users' demands for sound quality of handheld electronic devices increase, electronic devices equipped with more than two audio output modules have begun to appear, such as tablet computers equipped with four audio output modules. However, in actual applications, even if an electronic device is equipped with more than two audio output modules, the audio processing unit of the electronic device only supports stereo format, which leads to sound field deviation when playing multi-channel audio, impaired audio quality, and reduced user experience.

Summary of the invention

The present disclosure provides a method, device and storage medium for converting a multi-channel signal.

According to a first aspect of an embodiment of the present disclosure, a method for converting a multi-channel signal is provided, which is applied to an electronic device including multiple audio output modules, and includes:

Obtaining the number of channels of the input first audio signal;

If the number of channels of the first audio signal is not a preset number of channels, converting the first audio signal into a second audio signal with the preset number of channels;

Different audio output modules are used to output audio signals of different channels of the second audio signal.

Optionally, converting the first audio signal into a second audio signal with the preset number of channels includes:

Determining a target conversion method from preset channel conversion methods based on the number of channels of the first audio signal;

Based on the target conversion mode, the first audio signal is converted into the second audio signal.

Optionally, the using different audio output modules to output audio signals of different channels of the second audio signal includes:

Separating the second audio signal into a plurality of audio signals of different channels;

Determining a correspondence between the plurality of audio output modules and the plurality of audio signals of different channels according to the positions of the plurality of audio output modules and the orientation information contained in the plurality of audio signals of different channels;

Based on the corresponding relationship, different audio output modules are used to output audio signals of different channels of the second audio signal.

Optionally, the method further comprises:

Determining that the distribution status information of the multiple audio output modules does not meet the first preset condition, performing distance compensation processing on the audio signals of different channels corresponding to the multiple audio output modules; the sound image distance of the audio signal after the distance compensation processing is greater than the sound image distance of the audio signal;

The method of outputting audio signals of different channels of the second audio signal by using different audio output modules based on the corresponding relationship includes:

Based on the corresponding relationship, different audio output modules are used to output the audio signal after the distance compensation processing.

Optionally, the method further comprises:

Determining whether the output performance of the multiple audio output modules meets a second preset condition;

If the output performance of the multiple audio output modules does not meet the second preset condition, modulate the audio signals of different channels corresponding to the multiple audio output modules; the output performance of the multiple audio output modules determined based on the modulated audio signals meets the second preset condition;

The method of outputting audio signals of different channels of the second audio signal by using different audio output modules based on the corresponding relationship includes:

Based on the corresponding relationship, different audio output modules are used to output the modulated audio signal.

Optionally, the output performance satisfies the second preset condition, including:

The error value between the frequency response curves of the multiple audio output modules is less than a first preset value;

And/or, the loudness difference between the multiple audio output modules is less than a second preset value.

Optionally, the using different audio output modules to output audio signals of different channels of the second audio signal includes:

Determine the multiple audio output modules as first-category audio output modules and second-category audio output modules according to whether the operating frequency ranges of the multiple audio output modules completely cover the frequencies of the audio signals of the different channels; wherein the operating frequency range of the first-category audio output module does not completely cover the frequencies of the audio signals of the different channels;

Performing frequency division processing on the first channel signal corresponding to the first type of audio output module to obtain a first frequency signal and a second frequency signal; wherein the frequency of the first frequency signal is included in the operating frequency range of the first type of audio output module;

The first type of audio output module is used to output the first frequency signal, and the second type of audio output module is used to output the corresponding second channel signal and the second frequency signal.

Optionally, the method further comprises:

Determine a third type of audio output module from the second type of audio output module, wherein a position of the third type of audio output module in the first direction is the same as a position of the first type of audio output module in the first direction;

The using the first type of audio output module to output the first frequency signal, and the using the second type of audio output module to output the corresponding second channel signal and the second frequency signal, comprises:

Outputting the first frequency signal using a first type of audio output module;

The third type audio output module is used to output the corresponding second channel signal and the second frequency signal.

According to a second aspect of an embodiment of the present disclosure, a multi-channel signal conversion device is provided, which is applied to an electronic device including multiple audio output modules, including:

An acquisition module, used to acquire the number of channels of an input first audio signal;

A conversion module, configured to convert the first audio signal into a second audio signal with a preset number of channels if the number of channels of the first audio signal is not a preset number of channels;

The output module is used to output the audio signals of different channels of the second audio signal by using different audio output modules.

Optionally, the conversion module is used to:

Determining a target conversion method from preset channel conversion methods based on the number of channels of the first audio signal;

Based on the target conversion mode, the first audio signal is converted into the second audio signal.

Optionally, the output module is used to:

Separating the second audio signal into a plurality of audio signals of different channels;

Determining a correspondence between the plurality of audio output modules and the plurality of audio signals of different channels according to the positions of the plurality of audio output modules and the orientation information contained in the plurality of audio signals of different channels;

Based on the corresponding relationship, different audio output modules are used to output audio signals of different channels of the second audio signal.

Optionally, the device further comprises: a compensation module, configured to:

Determining that the distribution status information of the multiple audio output modules does not meet the first preset condition, performing distance compensation processing on the audio signals of different channels corresponding to the multiple audio output modules; the sound image distance of the audio signal after the distance compensation processing is greater than the sound image distance of the audio signal;

The output module is used for:

Based on the corresponding relationship, different audio output modules are used to output the audio signal after the distance compensation processing.

Optionally, the device further comprises: a compensation module, configured to:

Determining whether the output performance of the multiple audio output modules meets a second preset condition;

If the output performance of the multiple audio output modules does not meet the second preset condition, the audio signals of different channels corresponding to the multiple audio output modules are modulated; the output performance of the multiple audio output modules determined based on the modulated audio signals meets the second preset condition.

The output module is used for:

Based on the corresponding relationship, different audio output modules are used to output the modulated audio signal.

Optionally, the output performance satisfies the second preset condition, including:

The error value between the frequency response curves of the multiple audio output modules is less than a first preset value;

And/or, the loudness difference between the multiple audio output modules is less than a second preset value.

Optionally, the output module is further used to:

Determine the multiple audio output modules as first-category audio output modules and second-category audio output modules according to whether the operating frequency ranges of the multiple audio output modules completely cover the frequencies of the audio signals of the different channels; wherein the operating frequency range of the first-category audio output module does not completely cover the frequencies of the audio signals of the different channels;

Performing frequency division processing on the first channel signal corresponding to the first type of audio output module to obtain a first frequency signal and a second frequency signal; wherein the frequency of the first frequency signal is included in the operating frequency range of the first type of audio output module;

The first type of audio output module is used to output the first frequency signal, and the second type of audio output module is used to output the corresponding second channel signal and the second frequency signal.

Optionally, the output module is further used to:

Determine a third type of audio output module from the second type of audio output module, wherein a position of the third type of audio output module in the first direction is the same as a position of the first type of audio output module in the first direction;

Outputting the first frequency signal using a first type of audio output module;

The third type audio output module is used to output the corresponding second channel signal and the second frequency signal.

According to a third aspect of an embodiment of the present disclosure, a multi-channel signal conversion device is provided, including:

processor;

a memory for storing executable instructions;

The processor is configured to: when executing the executable instructions stored in the memory, implement the steps in the multi-channel signal conversion method described in the first aspect of the embodiment of the present disclosure.

According to a fourth aspect of an embodiment of the present disclosure, a non-temporary computer-readable storage medium is provided. When the instructions in the storage medium are executed by a processor of a multi-channel signal conversion device, the multi-channel signal conversion device is enabled to perform the steps in the multi-channel signal conversion method described in the first aspect of the embodiment of the present disclosure.

The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

The disclosed embodiment obtains the number of channels of an input first audio signal, and if the number of channels of the first audio signal is not a preset number of channels, converts the number of channels of the first audio signal into a second audio signal with a preset number of channels, so as to convert the first audio signal into a second audio signal that can be adapted to the electronic device, and uses different audio output modules to output audio signals of different channels of the second audio signal, thereby minimizing the occurrence of sound and image deviation on the basis of adapting to the electronic device, improving the sound quality of the electronic device, and enhancing the user experience.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Fig. 1 is a schematic flow chart 1 showing a method for converting a multi-channel signal according to an exemplary embodiment.

Fig. 2 is a second flowchart of a method for converting a multi-channel signal according to an exemplary embodiment.

Fig. 3 is a schematic diagram showing a mapping of a 6-channel signal to a 4-channel signal according to an exemplary embodiment.

Fig. 4 is a schematic diagram showing the position distribution of speakers in an electronic device according to an exemplary embodiment.

Fig. 5 is a schematic diagram showing a flow chart of performing frequency division processing on an audio signal corresponding to a speaker according to an exemplary embodiment.

Fig. 6 is a third flowchart of a method for converting a multi-channel signal according to an exemplary embodiment.

Fig. 7 is a schematic structural diagram of a device for converting a multi-channel signal according to an exemplary embodiment.

Fig. 8 is a block diagram showing a device for converting a multi-channel signal according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

In the related art, since electronic devices are all based on stereo speakers, multi-channel audio signals with more than two channels will be down-mixed into stereo audio signals (i.e., two-channel audio signals), as shown in Table 1, which is a mapping table for converting multi-channel audio signals into two-channel audio signals.

Table 1 Mapping table for converting multi-channel audio signals into dual-channel audio signals

Multi-channel audio signal Stereo audio signal Mono c L＝c，R＝c Dual channel l, r L＝l，R＝r Three-channel l, r, c L＝1/2+c/2，R＝r/2+c/2 Four-channel l, r, ls, rs L＝1/2+ls/2，R＝r/2+rs/2 Five-channel l, r, c, ls, rs L＝(1+ls+c)/3, R＝(r+rs+c)/3 Six-channel l, r, c, lfe, ls, rs L＝(1+ls+c+lfe)/4, R＝(r+rs+c+lfe)/4

Wherein, c is the center channel, l is the left channel, r is the right channel, ls is the left surround channel, rs is the right surround channel, lfe is the subwoofer channel, L is the left channel of the stereo audio signal, and R is the right channel of the stereo audio signal.

However, as users' demands for sound quality of electronic devices increase, the number of speakers on electronic devices is gradually increasing, and electronic devices with four speakers are beginning to appear. However, in the related art, such electronic devices with four speakers are still based on stereo speaker playback. When playing 5.1 multi-channel (i.e., 6-channel) or more audio signals, sound and image deviation may occur, which reduces the user experience.

In this regard, an embodiment of the present disclosure provides a method for converting a multi-channel signal. FIG1 is a flowchart of a method for converting a multi-channel signal according to an exemplary embodiment. As shown in FIG1 , the method includes:

Step S101, obtaining the number of channels of an input first audio signal;

Step S102: if the number of channels of the first audio signal is not a preset number of channels, convert the first audio signal into a second audio signal with a preset number of channels;

Step S103: using different audio output modules to output audio signals of different channels of the second audio signal.

In the embodiment of the present disclosure, the multi-channel signal conversion method can be applied to an electronic device including multiple audio output modules, and the electronic device can be, but is not limited to, a smart phone, a tablet computer, a laptop computer or a vehicle-mounted terminal; the electronic device is equipped with a player for playing audio, and the player can be a player capable of playing audio, such as an audio player, and the processing unit for playing audio in a video player is also within the protection scope of the present disclosure. .

In step S101, when it is determined that a first audio signal is input to the electronic device, the number of channels in the first audio signal is detected;

Exemplarily, the audio track information of the first audio signal may be acquired, and the number of channels included in the first audio signal may be determined according to the audio track information.

In step S102, the preset number of channels may be determined according to the number of audio output modules included in the electronic device, and the preset number of channels is less than or equal to the number of audio output modules included in the electronic device.

In some embodiments, the preset number of channels may be the number of audio output modules included in the electronic device.

After obtaining the number of channels of the first audio signal, determine whether the number of channels of the first audio signal is the preset number of channels, and if the number of channels of the first audio signal is not the preset number of channels, convert the first audio signal to obtain a second audio signal with the preset number of channels. Here, the number of channels of the first audio signal is not the preset number of channels includes: the number of channels of the first audio signal is less than the preset number of channels, or the number of channels of the first audio signal is more than the preset number of channels.

In some embodiments, the preset number of channels may be: the number of audio output modules included in the electronic device that outputs the audio signal, or the number of available audio output modules that the electronic device that outputs the audio signal can currently use to output audio.

Exemplarily, the preset number of channels may be 2, 4, 6 or 8.

In some other embodiments, the preset number of channels may include: a first number of channels and a second number of channels; wherein the first number of channels may be the number of audio output modules included in the electronic device, and the second number of channels is less than the first number of channels. Exemplarily, the second number of channels may be 2, 4, or 6.

The method comprises:

Obtaining a remaining power value of the electronic device;

If the remaining power value of the electronic device is greater than the power threshold, determine whether the number of channels of the first audio signal is the first number of channels; if the number of channels of the first audio signal is not the first number of channels, convert the first audio signal to obtain a second audio signal with the first number of channels.

If the remaining power value of the electronic device is less than the power threshold, determining whether the number of channels of the first audio signal is greater than or equal to the number of second channels;

If the number of channels of the first audio signal is greater than or equal to the number of the second channels, output the first audio signal;

If the number of channels of the first audio signal is smaller than the number of the second channels, the first audio signal may be converted to obtain a second audio signal with the second number of channels.

Here, the second number of channels may be a fixed value set by default in the electronic device, or may be a fixed value preset by a user.

The disclosed embodiments take into account the remaining power value of the electronic device. When the remaining power value of the electronic device is less than the power threshold, it can be considered that the remaining power value of the electronic device is low. At this time, the usage time of the electronic device is often more concerned. Since the power consumption of outputting audio using all audio output modules in the electronic device is high, when the remaining power value of the electronic device is low, it is easy for the electronic device to lose power and shut down in a short time.

Therefore, when the remaining power value of the electronic device is less than the power threshold, for example, the remaining power value of the electronic device is less than 20% of the total power; the number of channels of the first audio signal is compared with the number of the second channels. If the number of channels of the first audio signal is not the second number of channels, the first audio signal can be converted to obtain a second audio signal with a second number of channels, thereby ensuring that the electronic device has a longer standby time while ensuring the audio output effect.

In step S103, based on the second audio signal with a preset number of channels, a corresponding audio output module is allocated to each channel, so that different audio output modules output audio signals of different channels of the second audio signal.

The disclosed embodiment converts a multi-channel first audio signal into a second audio signal with a preset number of channels, and then allocates different audio output modules to audio signals of different channels in the second audio signal, so that when the second audio signal is output through an electronic device, different audio output modules output audio signals of corresponding channels, thereby improving the audio output effect. If the preset number of channels is 4 or 8, if the number of channels of the first audio signal is less than the preset number of channels, the conversion of the audio signal with fewer channels to the audio signal with more channels is achieved, and the surround sound effect of the audio is improved through the output of the multi-channel audio signal.

Optionally, the converting of the first audio signal into a second audio signal with the preset number of channels in step S102 includes:

Determining a target conversion method from preset channel conversion methods based on the number of channels of the first audio signal;

Based on the target conversion mode, the first audio signal is converted into the second audio signal.

In the embodiment of the present disclosure, the preset channel conversion method may be used to indicate a mapping relationship between the first audio signals and the second audio signals having a plurality of different numbers of channels.

It is understandable that the second audio signal has different preset channel numbers, and the channel conversion methods for converting the multi-channel first audio signal into the second audio signal are also different. In addition, the second audio signal with the same preset channel number may also correspond to multiple channel conversion methods.

It should be noted that the channel conversion method can be set according to actual needs. The embodiment of the present disclosure shows a preset channel conversion method, which is used to indicate the mapping relationship between a plurality of first audio signals with different numbers of channels and a second audio signal of 4 channels, as shown in Table 2, which is a mapping relationship table of multi-channel first audio signals and 4-channel second audio signals.

Table 2 Mapping relationship table

Channel of the first audio signal Channel of the second audio signal Mono c L=c, R=c, LS=c, RS=c Dual channel l, r L=l, R=r, LS=l, RS=r Three-channel l, r, c L＝1/2+c/2, R＝r/2+c/2, LS＝1/2, RS＝r/2 Four-channel l, r, ls, rs L=1, R=r, LS=ls, RS=rs Five-channel l, r, c, ls, rs L=1+c/4, R=r+c/4, LS=ls, RS=rs Six-channel l, r, c, lfe, ls, rs L＝1+c/2+lfe/4, R＝r+c/2+lfe/4, LS＝ls+lfe/4, RS＝rs+lfe/4

Wherein, c is the center channel, l is the left channel, r is the right channel, ls is the left surround channel, rs is the right surround channel, and lfe is the subwoofer channel. L is the left channel of the second audio signal, R is the right channel of the second audio signal; LS is the left surround channel of the second audio signal; and RS is the right surround channel of the second audio signal.

According to the number of channels of the first audio signal, a target conversion method corresponding to the number of channels of the searched first audio signal can be determined from the preset multiple channel conversion methods; and according to the target conversion method, the first audio signal is converted into the second audio signal.

Exemplarily, if the first audio signal is a 6-channel audio signal, that is, the first audio signal includes a left channel l, a right channel r, a center channel c, a left surround channel ls, a right surround channel rs and a low-frequency channel lfe, the second audio signal is a 4-channel signal, that is, the second audio signal includes a left channel L, a right channel R, a left surround channel LS and a right surround channel RS.

Based on multiple preset channel conversion methods, a target conversion method is determined, which is to first allocate the left channel l, right channel r, left surround channel ls, and right surround channel rs of the first audio signal to the left channel L, right channel R, left surround channel LS, and right surround channel RS of the second audio signal; then allocate the center channel c evenly to the left channel L and right channel R of the second audio signal; and allocate the subwoofer lfe evenly to the left channel L, right channel R, left surround channel LS, and right surround channel RS of the second audio signal. Based on the target conversion method, the left channel L of the second audio signal is determined to be l+c/2+lfe/4, the right channel is r+c/2+lfe/4, the left surround channel is ls+lfe/4, and the right surround channel is rs+lfe/4.

Optionally, the step S103 of outputting audio signals of different channels of the second audio signal by using different audio output modules includes:

Separating the second audio signal into a plurality of audio signals of different channels;

Determining a correspondence between the plurality of audio output modules and the plurality of audio signals of different channels according to the positions of the plurality of audio output modules and the orientation information contained in the plurality of audio signals of different channels;

Based on the corresponding relationship, different audio output modules are used to output audio signals of different channels of the second audio signal.

In the embodiment of the present disclosure, since the second audio signal includes audio signals of a preset number of channels and audio signals of different channels are independent of each other, the second audio signal can be separated into multiple audio signals of different channels according to the channels.

It should be noted that the second audio signal can be separated into multiple audio signals of different channels by using existing technology, which will not be described in detail here.

After obtaining audio signals of multiple different channels, determine the correspondence between the multiple audio output modules and the audio signals of multiple different channels according to the orientation information contained in the audio signals of the multiple different channels and the positions of the multiple audio output modules on the electronic device; and assign an audio output module to the audio signal of each channel based on the correspondence.

It should be noted that, based on the matching between the orientation information contained in the audio signals of the multiple different channels and the positions of the multiple audio output modules on the electronic device, the correspondence between the multiple audio output modules and the audio signals of the multiple different channels is determined, thereby reducing the occurrence of sound and image confusion.

It is understandable that since the audio signals of different channels refer to independent audio signals collected or played back at different spatial positions during recording or playback, the audio signals of different channels contain different azimuth information. For example, the azimuth information of the left channel audio signal is different from the azimuth information of the right channel audio signal.

For example, the electronic device includes four speakers, namely, an upper left speaker, an upper right speaker, a lower left speaker, and a lower right speaker. The second audio signal includes audio signals of a left channel L, a right channel R, a left surround channel LS, and a right surround channel RS. Based on the correspondence between different speakers and audio signals of different channels, the upper left speaker can output the audio signal of the left channel L, the upper right speaker can output the audio signal of the right channel R, the lower left speaker can output the audio signal of the left surround channel LS, and the lower right speaker can output the audio signal of the right surround channel RS, thereby achieving a four-sound surround playback effect and improving the user's auditory experience.

In some embodiments, according to the distribution positions of the audio output modules, two audio output modules symmetrically distributed about a central axis of the device can be combined into a channel group. For example, two audio output modules symmetrically distributed on the device can be combined into an audio output module for outputting a left channel of audio and an audio output module for outputting a right channel of audio to improve the sound output effect.

If the distribution position of the audio output module on the device is asymmetrical, then the audio output effect of symmetrical distribution can be achieved by setting the audio parameters. Specifically, in some embodiments, the method further includes:

Determining that the distribution status information of the multiple audio output modules does not meet the first preset condition, performing distance compensation processing on the audio signals of different channels corresponding to the multiple audio output modules; the sound image distance of the audio signal after the distance compensation processing is greater than the sound image distance of the audio signal;

The method of outputting audio signals of different channels of the second audio signal by using different audio output modules based on the corresponding relationship includes:

Based on the corresponding relationship, different audio output modules are used to output the audio signal after the distance compensation processing.

In the embodiment of the present disclosure, the distribution status information can be used to indicate the position distribution of the multiple audio output modules on the electronic device. The first preset condition can be set according to actual needs, for example, the first preset condition can be that the distances between the multiple audio output modules and the center point of the electronic device are equal.

It should be noted that in order to achieve better playback effects, after converting the first multi-channel audio signal into a second audio signal with a preset number of channels, the second audio signal needs to be adjusted accordingly so that the adjusted second audio signal can adapt to the hardware environment of the multiple speakers of the electronic device.

If the distribution status information indicates that the position distribution of the multiple audio output modules does not meet the first preset condition, distance compensation processing can be performed on the audio signals of different channels corresponding to the multiple audio output modules according to the position information of the multiple audio output modules.

It is understandable that different position distributions of audio output modules on electronic devices will directly affect the balance, sound field depth, etc. of the audio output by the audio output modules. For example, if the distances between the left speaker and the right speaker in the electronic device relative to the center point of the electronic device are different, when the electronic device is used to play audio, there is a distance difference between the left speaker and the right speaker relative to the user's ear, and the transmission distance of the left channel audio signal output by the left speaker is different from the transmission distance of the right channel audio signal output by the right speaker, which will affect the audio playback effect and may fail to achieve a stereo effect.

However, the position of the audio output module in the electronic device is usually fixed, and the playback effect cannot be improved by adjusting the position of the audio output module. In this regard, the embodiment of the present disclosure can perform distance compensation processing on the audio signals of different channels corresponding to the multiple audio output modules when the position distribution of the multiple audio output modules does not meet the first preset condition, thereby expanding the sound image distance between the audio signals of different channels.

In the embodiment of the present disclosure, the distance compensation processing may include but is not limited to: eliminating the crosstalk between the audio signals of different channels corresponding to the multiple audio output modules through a filtering component to expand the sound image distance of the audio signals of different channels.

The audio signals of different channels after distance compensation are input to the corresponding audio output modules, so that the difference between the sound and image distances of the audio signals output by the multiple audio output modules is less than a preset value, thereby reducing the poor audio playback effect caused by the unreasonable position distribution of the audio output modules of the electronic device.

Optionally, the first preset condition includes:

The position distribution of the multiple audio output modules indicated by the distribution status information satisfies a position symmetry condition.

In the embodiment of the present disclosure, the position symmetry condition may be that any pair of audio output modules among the multiple audio output modules are symmetrically arranged on both sides of the electronic device.

It is understandable that if there is at least one pair of audio output modules among the multiple audio output modules that are not symmetrically arranged on both sides of the electronic device, the distances between the pair of audio output modules and the center point of the electronic device are also different. Correspondingly, the transmission distances of the audio signals output by the pair of audio output modules are also different, which can easily cause sound and image deviation.

For example, if the distribution status information indicates that the positions of the multiple audio output modules on the electronic device are distributed in a rectangular shape, any pair of the multiple audio output modules must be symmetrically arranged on both sides of the electronic device, so the position distribution of the multiple audio output modules satisfies the position symmetry condition.

For another example, if the distribution status information indicates that the positions of the multiple audio output modules on the electronic device are trapezoidally distributed, and at least one group of the multiple audio output modules is asymmetrically located, the position distribution of the multiple audio output modules does not meet the position symmetry condition, and it is necessary to perform distance compensation processing on the audio signals of different channels output by the audio output modules, so that the audio signals of different channels after distance compensation are input to the corresponding audio output modules, so that the difference between the sound image distances of the audio signals output by the multiple audio output modules is less than a preset value.

Optionally, the method further comprises:

Determining whether the output performance of the multiple audio output modules meets a second preset condition;

If the output performance of the multiple audio output modules does not meet the second preset condition, modulate the audio signals of different channels corresponding to the multiple audio output modules; the output performance of the multiple audio output modules determined based on the modulated audio signals meets the second preset condition;

The method of outputting audio signals of different channels of the second audio signal by using different audio output modules based on the corresponding relationship includes:

Based on the corresponding relationship, different audio output modules are used to output the modulated audio signal.

In the embodiment of the present disclosure, the output performance of the multiple audio output modules may include: parameters such as sensitivity, distortion, frequency response curve, loudness and/or rated impedance of the multiple audio output modules.

By determining whether the output performance of the multiple audio output modules meets the second preset condition, it is determined whether there is a large difference in the output performance of the multiple audio output modules. It is understandable that even if two audio output modules with a large difference in output performance play the same audio, the user's auditory experience may also be very different.

Here, the second preset condition can be determined according to the specific parameters of the output performance of the multiple audio output modules obtained.

In some embodiments, whether the output performance of the multiple audio output modules meets the second preset condition can be determined based on the frequency response curves and/or loudness of the multiple audio output modules.

It should be noted that the frequency response curve refers to the increase or attenuation of the sound pressure generated by the audio output module as the frequency changes when an audio signal output at a constant voltage is connected to the audio system. It is used to describe the associated changes in sound pressure and frequency. The frequency response curve can reflect the frequency response of the audio output module to the input audio signal in the full frequency band. It is understandable that the differences between the frequency response curves of different audio output modules can largely reflect the differences in the characteristics of the different audio output modules.

The loudness is the subjective feeling of the human ear on the intensity of the sound. It is not consistent with the actual intensity of the objective sound. The loudness is related to the ratio of the sound pressure at different intensities. For audio with the same sound intensity, if the frequency is different, the loudness is also different. The difference in the output performance of different audio output modules can be reflected according to the loudness difference between different audio output modules.

If the output performance of the multiple audio output modules does not meet the second preset condition, that is, the difference between the output performance of the multiple audio output modules is large, in order to compensate for the output performance difference between the multiple audio output modules of the electronic device, the audio signals of different channels corresponding to the multiple audio output modules can be modulated so that the output performance of the multiple audio output modules when outputting the modulated audio signals meets the second preset condition.

Here, the modulation processing includes but is not limited to: equalization processing based on an equalizer, dynamic gain control processing or gain control processing.

For example, the frequency response curves and/or loudness of audio signals of different channels corresponding to multiple audio output modules can be modulated respectively by dynamic gain control, so that the frequency response curves and/or loudness of audio signals of different channels meet the second preset condition.

Optionally, the output performance satisfies the second preset condition, including:

The error value between the frequency response curves of the multiple audio output modules is less than a first preset value;

And/or, the loudness difference between the multiple audio output modules is less than a second preset value.

In the embodiment of the present disclosure, the first preset value and the second preset value can be set according to actual needs.

The output performance of the multiple audio output modules includes: frequency response curves and/or loudness of the multiple audio output modules.

The audio signals of different channels corresponding to the multiple audio output modules can be modulated so that the error value between the frequency response curves of the multiple audio output modules when outputting the modulated audio signals is less than a first preset value, and/or the error value between the loudness of the multiple audio output modules when outputting the modulated audio signals is less than a second preset value, thereby reducing the sound field deviation caused by inconsistent output performance of multiple audio output modules in the electronic device and improving the user experience.

Optionally, the using different audio output modules to output audio signals of different channels of the second audio signal includes:

Determine the multiple audio output modules as first-category audio output modules and second-category audio output modules according to whether the operating frequency ranges of the multiple audio output modules completely cover the frequencies of the audio signals of the different channels; wherein the operating frequency range of the first-category audio output module does not completely cover the frequencies of the audio signals of the different channels;

Performing frequency division processing on the first channel signal corresponding to the first type of audio output module to obtain a first frequency signal and a second frequency signal; wherein the frequency of the first frequency signal is included in the operating frequency range of the first type of audio output module;

The first type of audio output module is used to output the first frequency signal, and the second type of audio output module is used to output the corresponding second channel signal and the second frequency signal.

In the embodiments of the present disclosure, it is taken into account that the frequency ranges of the playable audios of the various audio output modules in the electronic device may be different. For example, the audio output modules may be divided into high-frequency output modules, low-frequency output modules, and full-band output modules, etc., according to the different working frequency ranges that the audio output modules can support.

In order to reduce the problem of low sound quality caused by the working frequency range that can be supported by the audio output module in the electronic device, the embodiment of the present disclosure can determine whether the working frequency range of the multiple audio output modules completely covers the frequencies of the audio signals of the different channels. If there is an audio output module whose working frequency range does not completely cover the frequency of the audio signal, the multiple audio output modules are respectively determined as a first type of audio output module whose working range does not completely cover the frequency of the audio signal and a second type of audio output module whose working range can completely cover the frequency of the audio signal.

A first channel signal corresponding to the first type of audio output module is obtained, and the first channel signal is subjected to frequency division processing to obtain a first frequency signal and a second frequency signal respectively, wherein the first frequency signal is a signal whose frequency in the first channel signal is included in the operating frequency range of the first type of audio output module, and the second frequency signal is a signal whose frequency in the first channel signal is not included in the operating frequency range of the first type of audio output module.

It should be noted that the first channel signal can be frequency-divided by a frequency-dividing processing method in the prior art to obtain a first frequency signal and a second frequency signal, which will not be described in detail here.

After the first channel signal is divided into a first frequency signal and a second frequency signal, the first frequency signal can be output by a first type of audio output module, and the second frequency signal can be output by a second type of audio output module. This ensures that the channel information of the audio signal is not lost even if the working frequency range of the audio output module in the electronic device cannot support the first channel signal.

Optionally, the method further comprises:

Determine a third type of audio output module from the second type of audio output module, wherein a position of the third type of audio output module in the first direction is the same as a position of the first type of audio output module in the first direction;

The using the first type of audio output module to output the first frequency signal, and the using the second type of audio output module to output the corresponding second channel signal and the second frequency signal, comprises:

Outputting the first frequency signal using a first type of audio output module;

The third type audio output module is used to output the corresponding second channel signal and the second frequency signal.

In the disclosed embodiment, the first direction may be a horizontal direction. For example, for an electronic device including four speakers, if the upper left speaker is a first-category audio output module, the lower left speaker whose horizontal position is the same as that of the upper left speaker may be determined as a third-category audio output module.

After determining the third-class audio output module, the first-class audio output module is used to output the first frequency signal, and the third-class audio output module is used to output the second channel signal and the second frequency signal corresponding to the third-class audio output module; since the third-class audio output module and the first-class audio output module have the same position in the first direction, the sound and image of each channel in the audio signal can be restored to the greatest extent.

The present disclosure also provides the following embodiments:

FIG. 2 is a second flow chart of a method for converting a multi-channel signal according to an exemplary embodiment, the method comprising:

Step S201, obtaining the number of channels of an input first audio signal;

In this example, a first audio signal input by an electronic device is acquired, and the number of channels included in the first audio signal is determined.

It should be noted that the electronic device is an electronic device including a plurality of audio output modules; the audio output module here may be a speaker. In this example, the electronic device is an electronic device including 4 speakers.

Step S202: if the number of channels of the first audio signal is not a preset number of channels, determine a target conversion method from a plurality of preset channel conversion methods based on the number of channels of the first audio signal; and convert the first audio signal into a second audio signal based on the target conversion method;

Here, the preset number of channels may be set according to actual conditions. In this example, the preset number of channels may be determined according to the number of audio output modules included in the electronic device, that is, the preset number of channels may be 4.

The preset channel conversion method can be set according to actual needs.

In some embodiments, the second audio signal can be separated into audio signals of different channels; the correspondence between the multiple audio output modules and the multiple audio signals of different channels is determined according to the positions of the multiple audio output modules and the orientation information contained in the multiple audio signals of different channels; based on the correspondence, the audio signals of different channels of the second audio signal are input into the multiple audio output modules.

Exemplarily, taking the first audio signal as a 6-channel audio signal and the second audio signal as a 4-channel audio signal as an example, the first audio signal is converted into a second audio signal. FIG3 is a schematic diagram of a mapping of a 6-channel signal to a 4-channel signal according to an exemplary embodiment. As shown in FIG3, the left channel l, the right channel r, the left surround channel ls and the right surround channel rs in the first audio signal are mapped to the upper left speaker L1, the upper right speaker R1, the lower left speaker L2 and the lower right speaker R2 of the electronic device. The center channel c of the first audio signal is evenly distributed to the upper left speaker L1 and the upper right speaker R1 of the electronic device; the subwoofer channel lfe of the first audio signal is evenly distributed to the upper left speaker L1, the upper right speaker R1, the lower left speaker L2 and the lower right speaker R2 of the electronic device, thereby obtaining a second audio signal containing 4 channels.

Step S203, determining whether the distribution status information of the multiple audio output modules meets a first preset condition, and if the distribution status information of the multiple audio output modules does not meet the first preset condition, performing distance compensation processing on the audio signals of different channels corresponding to the multiple audio output modules; the sound image distance of the audio signal after the distance compensation processing is greater than the sound image distance of the audio signal;

Here, the first preset condition includes: the position distribution of the multiple audio output modules indicated by the distribution status information satisfies a position symmetry condition.

It should be noted that if the position distribution of the multiple audio output modules does not meet the position symmetry condition, there will be deviation in sound and image when the electronic device outputs the second audio signal; however, the positions of the multiple audio output modules in the electronic device are usually fixed and not easy to move; in order to reduce the occurrence of sound and image deviation, the hardware environment of the audio output module in the electronic device needs to be adapted.

In this example, after converting the first audio signal into a second audio signal of four channels, the distribution status information of the multiple speakers is obtained. If the distribution status information indicates that the distance between the two upper speakers and the distance between the two lower speakers in the electronic device are inconsistent, that is, the position symmetry condition is not met, it is necessary to perform distance compensation processing on the audio signals of different channels corresponding to the multiple speakers according to the specific positions of the multiple speakers.

Exemplarily, as shown in FIG4, FIG4 is a schematic diagram of the position distribution of speakers in an electronic device according to an exemplary embodiment. In the electronic device, the distance between the lower left speaker L2 and the lower right speaker R2 is smaller than the distance between the upper left speaker L1 and the upper right speaker R1. A compensation module can be added to perform distance compensation on the audio signals of the left surround channel ls and the right surround channel rs corresponding to the lower left speaker L2 and the lower right speaker R2, so that the listening distance of the lower left speaker L2 and the lower right speaker R2 is expanded.

Step S204, determining whether the output performance of the multiple audio output modules meets the second preset condition, if the output performance of the multiple audio output modules does not meet the second preset condition, modulating the audio signals of different channels corresponding to the multiple audio output modules; the output performance of the multiple audio output modules determined based on the modulated audio signals meets the second preset condition;

Here, the output performance of the multiple audio output modules may include: the frequency response curve and loudness of the audio output modules.

The output performance satisfies the second preset condition, including:

The error value between the frequency response curves of the multiple audio output modules is less than a first preset value;

And/or, the loudness difference between the multiple audio output modules is less than a second preset value.

Here, the first preset value and the second preset value can be set according to actual conditions.

In this example, in order to match the inconsistent output performance between multiple speakers of the electronic device, the audio signal corresponding to each speaker can be modulated to ensure that the frequency response curves and loudness determined by the multiple speakers based on the audio signals of different channels after the modulation processing are very close, so that when the multiple speakers play the second audio signal, there will be no feeling that only one side of the speaker is playing the audio.

Step S205, determining the multiple audio output modules as first-category audio output modules and second-category audio output modules according to whether the operating frequency ranges of the multiple audio output modules completely cover the frequencies of the audio signals of the different channels; wherein the operating frequency range of the first-category audio output module does not completely cover the frequencies of the audio signals of the different channels;

It should be noted that since the operating frequency ranges of different speakers of an electronic device may be different, and the frequencies of audio signals of different channels of the second audio signal after distance compensation processing and/or modulation processing are the same, if the operating frequency range of a certain speaker cannot completely cover the frequencies of the audio signals of the different channels, the speaker may lose part of the frequency information of the audio signal when playing the corresponding audio signal.

In this example, the first type of audio output module may be a speaker in the electronic device that does not have a low-frequency playback capability; the second type of audio output module may be a speaker in the electronic device that has a low-frequency playback capability.

Step S206, performing frequency division processing on the first channel signal corresponding to the first type of audio output module to obtain a first frequency signal and a second frequency signal, wherein the frequency of the first frequency signal is included in the operating frequency range of the first type of audio output module;

In this example, the first frequency signal may be a high-frequency audio signal; and the second frequency signal may be a low-frequency audio signal.

The audio signal of the corresponding channel of the speaker in the electronic device without low-frequency playback capability can be frequency-divided into a high-frequency audio signal and a low-frequency audio signal.

Step S207, determining a third type of audio output module from the second type of audio output module, wherein the position of the third type of audio output module in the first direction is the same as the position of the first type of audio output module in the first direction; using the first type of audio output module to output the first frequency signal; and using the third type of audio output module to output the corresponding second channel signal and the second frequency signal.

Here, the first direction may be a horizontal direction. For example, if the first type of audio output module is the upper left speaker, the third type of audio output module is the lower left speaker; if the first type of audio output module is the upper right speaker, the third type of audio output module is the lower right speaker.

In this example, the high-frequency audio signal obtained by frequency division can be retained, and the low-frequency audio signal can be input into a speaker with low-frequency playback capability for playback, thereby not losing channel information and frequency information, and restoring the sound image of each channel to the greatest extent.

Exemplarily, as shown in Fig. 5, Fig. 5 is a schematic diagram of a process of frequency division processing of an audio signal corresponding to a speaker according to an exemplary embodiment. Wherein, the upper left speaker L1 does not have the low-frequency playback capability, and the left channel l signal corresponding to the upper left speaker L1 can be frequency-divided to obtain a low-frequency audio signal l_low and a high-frequency audio signal l_high; the high-frequency audio signal l_high and the left surround channel ls signal corresponding to the lower left speaker L2 are superimposed, and the audio signal after superimposition processing is output through the lower left speaker L2, and the low-frequency audio signal l_low is output through the upper left speaker L1.

Next, this example further provides a method for converting a multi-channel signal, which is applied to an electronic device including four speakers, as shown in FIG6 , which is a flowchart diagram of a method for converting a multi-channel signal according to an exemplary embodiment. Specifically:

Step S301, format information of the input source audio file;

Step S302, determining whether the source audio file is a 4-channel audio file based on the format information of the source audio file;

Step S303, if the source audio file is not a 4-channel audio file, perform 4-channel mapping on the source audio file; if the source audio file is a 4-channel audio file, execute step S304;

Step S304, obtaining a 4-channel audio file;

Step S305, determining whether the positions of the four speakers in the electronic device are symmetrical, and whether the output performances of the four speakers are consistent;

Step S306: if the positions of the four speakers are asymmetrical and/or the output performances of the four speakers are inconsistent, perform speaker compensation processing on the four-channel audio file; if the positions of the four speakers are symmetrical and the output performances of the four speakers are consistent, execute step S307;

Step S307, obtaining a 4-channel audio file after hardware adaptation to the electronic device;

Step S308: output the 4-channel audio file using the electronic device.

The embodiment of the present disclosure also provides a multi-channel signal conversion device. FIG7 is a structural schematic diagram of a multi-channel signal conversion device according to an exemplary embodiment. As shown in FIG7, the multi-channel signal conversion device is applied to an electronic device including multiple audio output modules. The multi-channel signal conversion device 100 includes:

An acquisition module 101 is used to acquire the number of channels of an input first audio signal;

A conversion module 102, configured to convert the first audio signal into a second audio signal with a preset number of channels if the number of channels of the first audio signal is not a preset number of channels;

The output module 103 is used to output audio signals of different channels of the second audio signal by using different audio output modules.

Optionally, the conversion module 102 is used to:

Determining a target conversion method from preset channel conversion methods based on the number of channels of the first audio signal;

Based on the target conversion mode, the first audio signal is converted into the second audio signal.

Optionally, the output module 103 is used to:

Separating the second audio signal into a plurality of audio signals of different channels;

Determining a correspondence between the plurality of audio output modules and the plurality of audio signals of different channels according to the positions of the plurality of audio output modules and the orientation information contained in the plurality of audio signals of different channels;

Based on the corresponding relationship, different audio output modules are used to output audio signals of different channels of the second audio signal.

Optionally, the device further includes: a compensation module 104, configured to:

Determining whether the distribution status information of the plurality of audio output modules meets a first preset condition;

If the distribution status information of the multiple audio output modules does not meet the first preset condition, distance compensation processing is performed on the audio signals of different channels corresponding to the multiple audio output modules; the sound image distance of the audio signal after the distance compensation processing is greater than the sound image distance of the audio signal;

The output module 103 is used to:

Based on the corresponding relationship, different audio output modules are used to output the audio signal after the distance compensation processing.

Optionally, the first preset condition includes:

The position distribution of the multiple audio output modules indicated by the distribution status information satisfies a position symmetry condition.

Optionally, the device further includes: a compensation module 104, configured to:

Determining whether the output performance of the multiple audio output modules meets a second preset condition;

If the output performance of the multiple audio output modules does not meet the second preset condition, the audio signals of different channels corresponding to the multiple audio output modules are modulated; the output performance of the multiple audio output modules determined based on the modulated audio signals meets the second preset condition.

The output module 103 is used to:

Based on the corresponding relationship, different audio output modules are used to output the modulated audio signal.

Optionally, the output performance satisfies the second preset condition, including:

The error value between the frequency response curves of the multiple audio output modules is less than a first preset value;

And/or, the loudness difference between the multiple audio output modules is less than a second preset value.

Optionally, the output module 103 is further used for:

Determine the multiple audio output modules as first-category audio output modules and second-category audio output modules according to whether the operating frequency ranges of the multiple audio output modules completely cover the frequencies of the audio signals of the different channels; wherein the operating frequency range of the first-category audio output module does not completely cover the frequencies of the audio signals of the different channels;

Performing frequency division processing on the first channel signal corresponding to the first type of audio output module to obtain a first frequency signal and a second frequency signal; wherein the frequency of the first frequency signal is included in the operating frequency range of the first type of audio output module;

The first type of audio output module is used to output the first frequency signal, and the second type of audio output module is used to output the corresponding second channel signal and the second frequency signal.

Optionally, the output module 103 is further used for:

Determine a third type of audio output module from the second type of audio output module, wherein a position of the third type of audio output module in the first direction is the same as a position of the first type of audio output module in the first direction;

Outputting the first frequency signal using a first type of audio output module;

The third type audio output module is used to output the corresponding second channel signal and the second frequency signal.

Fig. 8 is a block diagram of a device for converting a multi-channel signal according to an exemplary embodiment. For example, the device 800 may be a mobile phone, a mobile computer, etc.

8 , the device 800 may include one or more of the following components: a processing component 802 , a memory 804 , a power component 806 , a multimedia component 808 , an audio component 810 , an input/output (I/O) interface 812 , a sensor component 814 , and a communication component 816 .

The processing component 802 generally controls the overall operation of the device 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the above-mentioned method. In addition, the processing component 802 may include one or more modules to facilitate the interaction between the processing component 802 and other components. For example, the processing component 802 may include a multimedia module to facilitate the interaction between the multimedia component 808 and the processing component 802.

The memory 804 is configured to store various types of data to support operations on the device 800. Examples of such data include instructions for any application or method operating on the device 800, contact data, phone book data, messages, pictures, videos, etc. The memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The power supply component 806 provides power to the various components of the device 800. The power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 800.

The multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 808 includes a front camera and/or a rear camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a microphone (MIC), and when the device 800 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 804 or sent via the communication component 816. In some embodiments, the audio component 810 also includes a speaker for outputting audio signals.

I/O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

The sensor assembly 814 includes one or more sensors for providing various aspects of status assessment for the device 800. For example, the sensor assembly 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the device 800, and the sensor assembly 814 can also detect the position change of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and the temperature change of the device 800. The sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 814 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 816 is configured to facilitate wired or wireless communication between the device 800 and other devices. The device 800 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the apparatus 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors or other electronic components to perform the above method.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, and the instructions can be executed by the processor 820 of the device 800 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (8)

1. The method for converting the multichannel signal is characterized by being applied to an electronic device comprising a plurality of audio output modules, and comprises the following steps:

acquiring the number of channels of an input first audio signal;

If the number of channels of the first audio signal is not the preset number of channels, determining a target conversion mode from preset channel conversion modes based on the number of channels of the first audio signal; converting the first audio signal into a second audio signal based on the target conversion mode; the preset number of channels is the number of audio output modules contained in the electronic equipment, and the preset channel conversion mode is used for indicating the mapping relation between the first audio signals and the second audio signals with different numbers of channels;

separating the second audio signal into a plurality of different channel audio signals;

Determining corresponding relations between the audio output modules and the audio signals of the different channels according to the positions of the audio output modules and the azimuth information contained in the audio signals of the different channels;

when the position distribution of the plurality of audio output modules does not meet the position symmetry condition, performing distance compensation processing on audio signals of different channels corresponding to the plurality of audio output modules; the difference value between the sound image distances of the audio signals output by the plurality of audio output modules after the distance compensation processing is smaller than a preset value;

and outputting the audio signals of the different channels after the distance compensation processing by utilizing different audio output modules based on the corresponding relation.

2. The method according to claim 1, wherein the method further comprises:

Determining whether the output performance of the plurality of audio output modules meets a second preset condition;

If the output performance of the plurality of audio output modules does not meet a second preset condition, modulating the audio signals of different channels corresponding to the plurality of audio output modules; the output performance determined by the plurality of audio output modules based on the modulated audio signals meets the second preset condition;

based on the correspondence, outputting the audio signals of the different channels after the distance compensation processing by using different audio output modules, including:

And outputting the modulated audio signals by using different audio output modules based on the corresponding relation.

3. The method of claim 2, wherein the output performance meets the second preset condition, comprising:

The error value among the frequency response curves of the plurality of audio output modules is smaller than a first preset value;

And/or, the loudness difference between the plurality of audio output modules is smaller than a second preset value.

4. The method of claim 1, wherein outputting the distance-compensated audio signals of the different channels using different audio output modules comprises:

determining the plurality of audio output modules as a first type audio output module and a second type audio output module according to whether the working frequency ranges of the plurality of audio output modules completely cover the frequencies of the audio signals of the different channels; the working frequency range of the first type of audio output module does not completely cover the frequencies of the audio signals of the different channels;

Frequency division processing is carried out on the first channel signals corresponding to the first type of audio output modules, so that first frequency signals and second frequency signals are obtained; the frequency of the first frequency signal is contained in the working frequency range of the first type of audio output module;

And outputting the first frequency signal by using the first type of audio output module, and outputting a second corresponding frequency signal and the second frequency signal by using the second type of audio output module.

5. The method according to claim 4, wherein the method further comprises:

Determining a third type of audio output module from the second type of audio output module, wherein the position of the third type of audio output module in the first direction is the same as the position of the first type of audio output module in the first direction;

The outputting the first frequency signal by using the first type audio output module, and outputting the corresponding second channel signal and the second frequency signal by using the second type audio output module, including:

outputting the first frequency signal by using a first type of audio output module;

And outputting a corresponding second sound signal and the second frequency signal by using the third-class audio output module.

6. A multi-channel signal conversion device, which is applied to an electronic device including a plurality of audio output modules, comprising:

An acquisition module for acquiring the number of channels of the input first audio signal;

The conversion module is used for determining a target conversion mode from preset channel conversion modes based on the number of channels of the first audio signal if the number of channels of the first audio signal is not the preset number of channels; converting the first audio signal into a second audio signal based on the target conversion mode; the preset number of channels is the number of audio output modules contained in the electronic equipment, and the preset channel conversion mode is used for indicating the mapping relation between the first audio signals and the second audio signals with different numbers of channels;

An output module for separating the second audio signal into audio signals of a plurality of different channels; determining corresponding relations between the audio output modules and the audio signals of the different channels according to the positions of the audio output modules and the azimuth information contained in the audio signals of the different channels;

The compensation module is used for performing distance compensation processing on the audio signals of different channels corresponding to the plurality of audio output modules when the position distribution of the plurality of audio output modules does not meet the position symmetry condition; the difference value between the sound image distances of the audio signals output by the plurality of audio output modules after the distance compensation processing is smaller than a preset value;

the output module is further configured to output the audio signals of the different channels after the distance compensation processing by using different audio output modules based on the correspondence.

7. A multi-channel signal conversion apparatus, comprising:

A processor;

a memory for storing executable instructions;

wherein the processor is configured to: the method of converting a multi-channel signal according to any one of claims 1 to 5 is implemented when the executable instructions stored in the memory are executed.

8. A non-transitory computer readable storage medium, which when executed by a processor of a multi-channel signal conversion apparatus, causes the multi-channel signal conversion apparatus to perform the multi-channel signal conversion method of any one of claims 1 to 5.