Audio signal processing method and device, equipment and readable storage medium

Abstract

The embodiment of the invention provides an audio signal processing method, apparatus and device, and a readable storage medium. An electronic device obtains a to-be-played dual-channel stereophonic sound. And then, the electronic equipment determines playing signals of the sound equipment of each sound channel in the multi-channel surround sound system according to the spatial position of the sound equipment of each sound channel in the multi-channel surround sound system relative to the target position and the dual-channel stereophonic sound. By adopting the scheme, when the electronic equipment determines the playing signal of the sound equipment of each sound channel of the multi-channel surround sound system, the playing signals of the sound equipment of each sound channel are different by combining the spatial position of the sound equipment of each sound channel relative to the target position, the dual-channel stereo and the like, and due to the consideration of the spatial position of each sound equipment, the playing signal of the sound equipment of each sound channel is more accurate. Therefore, the position of the sound image can be corrected, the sound image offset caused by an asymmetric sound deployment mode is eliminated, and the purpose of improving the playing quality of the multichannel surround sound system to the dual-channel stereophonic sound is achieved.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of audio playback technology, and in particular to a method, device, equipment and readable storage medium for processing an audio signal. Background Art

[0002] Currently, multi-channel surround sound systems are widely used because they can give listeners a sense of presence. For example, a car's audio system may be equipped with multiple speakers.

[0003] Take the 5.1-channel car audio system as an example. The 5.1 channels include: front left channel, front right channel, center channel, rear left channel, rear right channel, and 0.1 channel. The 0.1 channel is also called the low-frequency channel or the subwoofer channel, and each channel is equipped with a speaker. Although there are a large number of songs and programs recorded for multi-channel surround sound systems, there are still many two-channel stereo songs or programs. When the car audio system plays two-channel stereo, the traditional practice is: the front left channel and the rear left channel speakers directly play the left channel signal, the front right channel and the rear right channel speakers directly play the right channel signal, and the center channel speakers play the synthesized signal, which is a signal synthesized by synthesizing the left channel signal and the right channel signal.

[0004] The above method of using a multi-channel audio system to play two-channel stereo has poor playback quality. Summary of the invention

[0005] The embodiments of the present application provide an audio signal processing method, apparatus, device and readable storage medium. For each channel of a multi-channel surround sound system, the playback signal of the audio of each channel is determined according to the spatial position of the audio of each channel relative to a target position and two-channel stereo, thereby eliminating the sound and image deviation caused by asymmetrically deployed audio, and improving the playback quality of the multi-channel surround sound system for two-channel stereo.

[0006] In a first aspect, an embodiment of the present application provides a method for processing an audio signal, which is applied to an electronic device having a multi-channel surround sound system, and the method includes:

[0007] Get the dual-channel stereo to be played;

[0008] According to multiple spatial positions and the two-channel stereo, the playback signal of the sound of each channel in the multi-channel surround sound system is determined, the multi-channel surround sound system includes at least one pair of channels, and the sound of each channel in the pair of channels is asymmetrically arranged. The multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to the target position, and the target position is the listener's position.

[0009] In a second aspect, an embodiment of the present application provides an audio signal processing device integrated in an electronic device having a multi-channel surround sound system, the device comprising:

[0010] An acquisition module, used for acquiring dual-channel stereo sound to be played;

[0011] A processing module is used to determine the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, the multi-channel surround sound system includes at least one pair of channels, the sound of each channel in the pair of channels is asymmetrically arranged, and the multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to a target position, and the target position is a listener's position.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the electronic device implements the method described in the first aspect or various possible implementation methods of the first aspect.

[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer instructions are stored. When the computer instructions are executed by a processor, they are used to implement the method described in the first aspect or various possible implementation methods of the first aspect.

[0014] In a fifth aspect, an embodiment of the present application provides a computer program product comprising a computing program, and when the computer program is executed by a processor, the method described in the first aspect or various possible implementation methods of the first aspect is implemented.

[0015] The audio signal processing method, device, equipment and readable storage medium provided in the embodiments of the present application are used by an electronic device to obtain two-channel stereo to be played. Afterwards, the electronic device determines the playback signal of the sound of each channel in the multi-channel surround sound system according to the spatial position of the sound of each channel relative to the target position and the two-channel stereo, and the target position is the listener's position. With this scheme, when the electronic device determines the playback signal of the sound of each channel in the multi-channel surround sound system, it combines the spatial position of the sound of each channel relative to the target position, the two-channel stereo, etc., so that the playback signal of the sound of each channel is different, and because the spatial position of each sound is taken into consideration, the sound and image position can be corrected, and the sound and image deviation caused by the asymmetric sound deployment method can be eliminated, so as to achieve the purpose of improving the playback quality of the two-channel stereo of the multi-channel surround sound system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a schematic diagram of the 5.1-channel home theater standard;

[0018] Figure 2A is a schematic diagram of a scenario to which the audio signal processing method provided in an embodiment of the present application is applicable;

[0019] Figure 2B yes Figure 2A A simplified schematic diagram of

[0020] Figure 3 is a flowchart of a method for processing an audio signal provided in an embodiment of the present application;

[0021] Figure 4 is another flow chart of the method for processing an audio signal provided in an embodiment of the present application;

[0022] Figure 5 A schematic diagram of an audio signal processing device provided in an embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] 5.1 channels include: front left channel, front right channel, center channel, rear left channel, rear right channel, and 0.1 channel. 0.1 channel is also called low-frequency channel or subwoofer channel. The standard 5.1 channel has strict requirements on the deployment position of the speakers of each channel.

[0025] Figure 1 This is a diagram of the 5.1-channel home theater standard. Please refer to Figure 1 The standard 5.1-channel speakers include: a front left speaker 11, a center speaker 12, a front right speaker 13, a rear right speaker 14, a rear left speaker 15, and a subwoofer 16. These speakers are connected to an electronic device 17, such as a TV, a projector, etc., and the connection methods include but are not limited to wired connection, Bluetooth connection, WiFi connection, etc.

[0026] In order to allow the user 18 to hear perfect sound effects, the center speaker 12 is located directly in front of the user 18, the front left speaker 11 and the front right speaker 13 are respectively located 30 degrees diagonally in front of the user, and the rear right speaker 14 and the rear left speaker 15 are respectively located 110 degrees diagonally behind the user. From the perspective of the user 18, the front left speaker 11 and the front right speaker 13 are symmetrically arranged, and the rear right speaker 14 and the rear left speaker 15 are symmetrically arranged.

[0027] At present, although there are a large number of songs and programs recorded for multi-channel surround sound systems, there are still many high-quality two-channel stereo songs or programs. At present, there are many methods for converting two-channel stereo to 5.1 channels so that standard 5.1 channels can play two-channel stereo.

[0028] With the development of technology, the in-vehicle audio system has gradually developed into a multi-channel surround sound system. The in-vehicle multi-channel surround sound system includes multiple channels, such as 4 channels, 5 channels, 7 channels or 9 channels. Different from the standard 5.1 channel with symmetrical deployment of left and right speakers, the speakers of the in-vehicle multi-channel surround sound system are deployed asymmetrically. For example, for the main driving seat, the front left speaker is closer than the front right speaker, the rear left speaker is closer than the rear right speaker, and the center speaker is often not deployed directly in front of the main driving seat. Therefore, the standard 5.1 channel method of playing two-channel stereo is not applicable to the in-vehicle multi-channel surround sound system.

[0029] When the car's audio system plays two-channel stereo, the traditional approach is to directly feed the left channel signal to the front left channel and the rear left channel, and directly feed the right channel signal to the front right channel and the rear right channel speakers, synthesize the left channel signal and the right channel signal to obtain a synthesized signal, and feed the synthesized signal to the center channel speaker.

[0030] However, when the multi-channel surround sound system in the car plays two-channel stereo in the above manner, the human voice that should be played by the front left channel, the center channel and the front right channel appears at the front and rear at the same time, that is, each channel plays the human voice. In this way, the rear speakers, which were originally used to play some ambient sounds or music accompaniment to create a sense of surround, play the same signal as the front speakers, resulting in poor playback quality, resulting in poor auditory spatial perception for users.

[0031] Based on this, the embodiments of the present application provide a method, apparatus, device and readable storage medium for processing audio signals. For each channel of a multi-channel surround sound system, the playback signal of the audio of each channel is determined according to the spatial position of the audio of each channel relative to the target position and two-channel stereo, thereby improving the playback quality of the multi-channel surround sound system for two-channel stereo.

[0032] In an embodiment of the present application, the vehicle-mounted multi-channel surround sound system includes multiple channels, such as 4 channels, 5 channels, 7 channels or 9 channels. From the perspective of the target position, the audio of each channel is deployed asymmetrically. The target position is, for example, the main driving position, the co-pilot position or the rear passenger position, etc., which is not limited by the embodiment of the present application. Below, an example of a vehicle-mounted multi-channel surround sound system including 5 channels is used for explanation.

[0033] Figure 2A Schematic diagram of a scenario applicable to the audio signal processing method provided in the embodiment of the present application. Figure 2A The multi-channel surround sound system includes five channels, namely, front left channel, center channel, front right channel, rear right channel, and rear left channel, and the corresponding speakers are: front left speaker 21, center speaker 22, front right speaker 23, rear right speaker 24, and rear left speaker 25. The multi-channel surround sound system is set in the vehicle central control, and these speakers are connected to the vehicle central control, and the connection methods include but are not limited to wired connection, Bluetooth connection, etc.

[0034] From the perspective of the target position, these speakers are arranged asymmetrically. For example, if the target position is the main driving position, the front left speaker 21 and the front right speaker 23 are arranged asymmetrically, and the rear right speaker 24 and the rear left speaker 25 are arranged asymmetrically.

[0035] Figure 2B yes Figure 2A Please refer to Figure 2B , the black dot indicates the target position, and the distances between the front left speaker 21, the center speaker 22, the front right speaker 23, the rear right speaker 24, and the rear left speaker 25 and the target position are r1, r2, r3, r4, and r5, respectively. In polar coordinates, in a clockwise direction, the angles of the front left speaker 21, the center speaker 22, the front right speaker 23, the rear right speaker 24, and the rear left speaker 25 relative to the target position are θ1, θ2, θ3, θ4, and θ5, respectively. The range of these angles is 0° to 360°.

[0036] In the embodiment of the present application, the spatial position of each speaker relative to the target position is represented by a distance and an angle. That is, if the distance and angle from a speaker to the target position are determined, the spatial position of the speaker relative to the target position is determined. For example, the spatial position of the front left speaker relative to the target position is represented by a distance r1 and an angle θ1. For another example, the spatial position of the center speaker relative to the target position is represented by a distance r2 and an angle θ2.

[0037] In an embodiment of the present application, when a two-channel stereo sound is played using a multi-channel surround sound system mounted in a vehicle, the playback signal of the audio of each channel is determined based on the spatial position of the audio of each channel relative to the target position and the two-channel stereo sound, thereby eliminating the sound and image offset caused by the asymmetrical deployment of the audio, and improving the playback quality of the two-channel stereo sound by the multi-channel surround sound system.

[0038] It should be noted that although the above Figure 2A and Figure 2B The multi-channel surround sound system in a car is taken as an example to illustrate the applicable scenario of the audio signal processing method of the present application. However, the embodiment of the present application does not limit the applicable scenario, and any scenario of asymmetrical deployment of audio is applicable to the present case.

[0039] Moreover, although the above Figure 2A and Figure 2B In the above description, the multi-channel surround sound system includes 5 channels. However, the present application is not limited thereto. For example, in other implementations, the multi-channel surround sound system may have only 4 channels, excluding the center channel. For another example, the multi-channel surround sound system has 7 channels, and another speaker is provided between the front left speaker 21 and the rear left speaker 25, and another speaker is provided between the front right speaker 23 and the rear right speaker 25. Alternatively, the multi-channel surround sound system has 6 channels, 9 channels, etc.

[0040] Below, in the above Figure 2A and Figure 2B Based on the above, the audio signal processing method described in the embodiment of the present application is described in detail. For example, please refer to Figure 3 .

[0041] Figure 3 : is a flowchart of the method for processing an audio signal provided in an embodiment of the present application. The execution subject of this embodiment is an electronic device, such as a vehicle-mounted central control, etc. This embodiment includes:

[0042] 301. Obtain dual-channel stereo to be played.

[0043] The electronic device obtains two-channel stereo sound to be played from a local or remote server, etc. The two-channel stereo sound includes a left channel signal and a right channel signal.

[0044] In the embodiment of the present application, the dual-channel stereo sound can be pure music (without human voice), pure voice (without accompaniment), accompaniment and mixed sound, etc., and the embodiment of the present application is not limited.

[0045] 302. Determine the playback signal of the sound of each channel in the multi-channel surround sound system according to the multiple spatial positions and the two-channel stereo, the target position is the listener's position, the multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to the target position, and the target position is the listener's position.

[0046] Exemplarily, the distance between the sound of each channel and the target position, and the angle of each sound relative to the target position in polar coordinates are pre-stored in the memory of the electronic device. For each sound, the spatial position of the sound relative to the target position is determined according to the distance and angle corresponding to the sound. The multi-channel surround sound systems of different vehicles correspond to different multiple spatial positions.

[0047] After the electronic device determines the multiple spatial positions, it determines the playback signal of the sound fed to the channel for each channel. For example, for the sound located in front of the target position, the playback signal of each sound in front of the target position is determined based on the two-channel stereo, the human voice signal, etc. The human voice signal is a human voice signal separated from the two-channel stereo. The front of the target position includes the front and the oblique front. Figure 2A and Figure 2B In the embodiment, the speakers located in front of the target position include a front left speaker 21, a center speaker 22 and a front right speaker 23.

[0048] For another example, for the sound behind the target position, the playback signal of the sound behind the target position is determined according to the accompaniment signal, the human voice signal, etc. The human voice signal and the accompaniment signal are both signals separated from the two-channel stereo. The target position behind includes the front and rear. Figure 2A and Figure 2B In the example, the speakers located behind the target position include a rear right speaker 24 and a rear right speaker 25.

[0049] In the method for processing audio signals provided in the embodiment of the present application, an electronic device obtains two-channel stereo to be played. Afterwards, the electronic device determines the playback signal of the sound of each channel in the multi-channel surround sound system according to the spatial position of the sound of each channel relative to the target position and the two-channel stereo, and the target position is the listener's position. With this scheme, when the electronic device determines the playback signal of the sound of each channel in the multi-channel surround sound system, it combines the spatial position of the sound of each channel relative to the target position, the two-channel stereo, etc., so that the playback signal of the sound of each channel is different, and because the spatial position of each sound is taken into consideration, the sound and image position can be corrected, and the sound and image deviation caused by the asymmetric sound deployment method can be eliminated, so as to achieve the purpose of improving the playback quality of the two-channel stereo of the multi-channel surround sound system.

[0050] Optionally, in the above embodiment, before the electronic device determines the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, it also determines a single-channel signal according to the left-channel signal and the right-channel signal contained in the two-channel stereo, and determines the human voice signal according to the single-channel signal. Afterwards, the left-channel accompaniment signal is determined according to the left-channel signal and the human voice signal; and the right-channel accompaniment signal is determined according to the right-channel signal and the human voice signal.

[0051] In the embodiment of the present application, a vocal signal and an accompaniment signal are separated from a dual-channel stereo, so that the vocal signal and the accompaniment signal are separated and applied to the vehicle sound effect. The accompaniment signal includes a left-channel accompaniment signal and a right-channel accompaniment signal. During the separation process, the electronic device averages the left-channel signal and the right-channel signal to obtain a single-channel signal, and inputs the single-channel signal into a vocal separation network to obtain a vocal signal.

[0052] In the traditional human voice separation method, human voice signal 1 is separated from the left channel signal, human voice signal 2 is separated from the right channel signal, and then human voice signal 1 and human voice signal 2 are synthesized to obtain the human voice signal. In the embodiment of the present application, after obtaining a single channel signal according to the signals of the left and right channels in the two-channel stereo, the human voice is separated, and only one human voice separation network is used, which has low computing power and high speed.

[0053] After the electronic device obtains the vocal signal, it subtracts the vocal signal from the left channel signal to obtain the left channel accompaniment signal, and subtracts the vocal signal from the right channel signal to obtain the right channel accompaniment signal.

[0054] By adopting this solution, the human voice signal and the accompaniment signal are separated and applied to the multi-channel surround sound system with asymmetrically deployed speakers, so as to achieve the purpose of improving the playback quality of the multi-channel surround sound system for dual-channel stereo.

[0055] Optionally, in the above embodiment, in the process of the electronic device determining the playback signal of the audio of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, the electronic device determines the amplitude and delay of the playback signal of the audio of each channel in the multi-channel surround sound system according to the multiple spatial positions and the two-channel stereo to obtain the playback signal of the corresponding audio.

[0056] In the embodiment of the present application, in order to enable the listener at the target position to feel the sense of presence, the amplitude and delay of the playback signal of each speaker are different. That is to say, for any speaker, if the amplitude and delay of the playback signal of the speaker are determined, the playback signal of the speaker is also determined. Therefore, the electronic device determines the amplitude and delay of the playback signal of each channel of the speaker in the multi-channel surround sound system according to multiple spatial positions and two-channel stereo to obtain the playback signal of the corresponding speaker.

[0057] This solution determines the amplitude and delay for each speaker to correct the unnatural auditory sensation caused by asymmetric distances and angles, thereby improving the playback quality of dual-channel stereo in a multi-channel surround sound system.

[0058] Optionally, in the above embodiment, the audio system of the multi-channel surround sound system can be divided into three categories according to the spatial position of each speaker relative to the target position. Figure 2A .

[0059] Please refer to Figure 2A , the first dividing line 26 is located in front of the target position, and the distance between the first dividing line 26 and the target position is a first preset distance. The second dividing line 27 is located behind the target position, and the distance between the second dividing line 27 and the target position is a second preset distance. The first preset distance refers to: the distance from the center point of the target position to the first dividing line 26, and the second preset distance refers to: the distance from the center point of the target position to the second dividing line 27.

[0060] In the embodiment of the present application, the sound located in front of the first dividing line is called the first type of sound, the sound located behind the second dividing line is called the second type of sound, and the sound located between the two dividing lines is called the third type of sound.

[0061] For the first type of audio, the electronic device determines the amplitude and delay of the playback signal of each audio in the first type of audio according to the spatial position of each audio in the first type of audio and the two-channel stereo, so as to obtain the playback signal of the corresponding audio. In the process of determining the playback signal, the left channel signal, the right channel signal or the human voice signal in the two-channel stereo are mainly used. Taking the case where there is no center speaker in the first type of audio and the playback signal of the front left channel is determined as an example, the electronic device determines the playback signal of the front left channel according to the left channel signal and the spatial position of each speaker in the first type of audio.

[0062] For the second type of audio, the electronic device determines the amplitude and delay of the playback signal of each audio in the second type of audio according to the spatial position of each audio in the second type of audio and the two-channel stereo, so as to obtain the playback signal of the corresponding audio. In the process of determining the playback signal, the accompaniment signal and the human voice signal determined according to the two-channel stereo are mainly used. Taking the determination of the playback signal of the rear right channel as an example, the electronic device determines the playback signal of the rear right channel according to the right channel accompaniment signal.

[0063] By adopting this solution, the electronic device classifies the audio of the multi-channel surround sound system and determines the playback signal of each speaker according to the category, with high speed and high accuracy.

[0064] The following describes in detail the process of determining the playback signal of each speaker in the first category of speakers and the second category of speakers.

[0065] First, the first type of speakers.

[0066] In the embodiment of the present application, the center speaker in the first type of speakers is called the second speaker, and the second speaker can be set or not according to the needs. For the other speakers in the first type of speakers except the center speaker, the speaker closest to the target position is called the first speaker, and the speaker farthest from the target position is called the third speaker. The first speaker and the third speaker are located on both sides of the target position, forming a pair of speakers in the multi-channel surround sound system and are deployed asymmetrically.

[0067] When there is a second speaker in the first category of speakers, that is, there is a center speaker, for the first speaker in the first category of speakers, according to the spatial positions of the speakers in the first category of speakers, the channel signal corresponding to the first speaker in the two-channel stereo, and the playback signal of the second speaker, the amplitude and delay of the playback signal of the first speaker are determined to obtain the playback signal of the first speaker. The first speaker is the speaker in the first category of speakers that is closest to the target position, and the second speaker is the speaker of the center channel.

[0068] For example, the first speaker is a front left speaker, and the electronic device determines the playback signal of the first speaker according to the spatial position of each speaker in the first category of speakers, the left channel signal and the playback signal of the second speaker.

[0069] For the second sound box, the amplitude and delay of the playback signal of the second sound box are determined according to the human voice signal, the single-channel signal and the preset first parameter to obtain the playback signal of the second sound box, the delay of the playback signal of the second sound box is 0, and the human voice signal and the single-channel signal are determined according to the dual-channel stereo. The delay is 0, indicating that no delay is made to the playback signal of the second sound box.

[0070] For example, the electronic device determines a single-channel signal based on the left-channel signal and the right-channel signal contained in the two-channel stereo, and determines the human voice signal based on the single-channel signal. After that, the electronic device performs a mixing operation on the human voice signal and the single-channel signal to obtain the playback signal of the center speaker. In this way, the playback signal of the center channel is determined by using the separated human voice signal, which can highlight the human voice and reduce the phenomenon of hollow sound image in the middle.

[0071] For the third speaker in the first category of speakers, the amplitude and delay of the playback signal of the third speaker are determined according to the channel signal corresponding to the third speaker in the dual-channel stereo to obtain the playback signal of the third speaker. The first speaker and the third speaker are a pair of speakers in the multi-channel surround sound system and are deployed asymmetrically.

[0072] For example, the first speaker is the front right speaker, and the electronic device directly uses the right channel signal as the playback signal of the third speaker.

[0073] Optionally, in the above embodiment, when there is no center speaker in the first category of speakers, for the first speaker in the first category of speakers, the amplitude and delay of the playback signal of the first speaker are determined according to the spatial positions of the speakers in the first category of speakers and the channel signal corresponding to the first speaker in the two-channel stereo, so as to obtain the playback signal of the first speaker. The method for determining the playback signal of the third speaker remains unchanged.

[0074] Optionally, in the above embodiment, when there are other speakers between the first speaker and the third speaker, for example, there is a seventh speaker between the first speaker and the center speaker, the playback signal of the seventh speaker is determined according to the playback signals of the first speaker and the center speaker, etc. The seventh speaker can be located at any position on the line connecting the first speaker and the center speaker, at any position on the perpendicular line of the line, etc., and the embodiment of the present application is not limited thereto.

[0075] By adopting this solution, for the first type of audio, the electronic device determines different playback signals for different audio according to the spatial position of each speaker and the left channel signal, the right channel signal, etc., so that the amplitude and delay of the playback signal of each audio are consistent with the position of the audio, thereby achieving the purpose of improving the playback quality of the multi-channel surround sound system for the two-channel stereo.

[0076] Secondly, the second type of audio.

[0077] In the embodiment of the present application, the speaker farthest from the target position in the second type of speakers is called the fourth speaker, and the speaker closest to the target position is called the fifth speaker. The fourth speaker and the fifth speaker are located on both sides of the target position, forming a pair of speakers in a multi-channel surround sound system and are deployed asymmetrically.

[0078] For a fourth sound in the second category of sounds, an amplitude and a delay of a playback signal of the fourth sound are determined according to an accompaniment signal, a vocal signal and a preset second parameter corresponding to the fourth sound, so as to obtain the playback signal of the fourth sound, wherein the fourth sound is the sound farthest from the target position in the second category of sounds.

[0079] For example, the fourth speaker is the rear right speaker, and the electronic device determines the amplitude and delay of the playback signal of the rear right speaker according to the right channel accompaniment signal, the human voice signal and the preset second parameter.

[0080] For the fifth speaker in the second category of speakers, the amplitude and delay of the playback signal of the fifth speaker are determined according to the spatial position of each speaker in the second category of speakers, the accompaniment signal corresponding to the fifth speaker and the preset second parameter to obtain the playback signal of the fifth speaker. The fifth speaker and the fourth speaker are a pair of speakers in the multi-channel surround sound system and are deployed asymmetrically.

[0081] For example, the fifth speaker is the rear left speaker. The electronic device determines the amplitude and delay of the playback signal of the rear left speaker according to the spatial position of each speaker in the second category of speakers, the left channel accompaniment signal, the vocal signal and the preset second parameter.

[0082] By adopting this solution, for the second type of audio, the electronic device determines different playback signals for different audio according to the spatial position of each speaker and the accompaniment signal, so that the amplitude and delay of the playback signal of each audio are consistent with the position of the audio, thereby achieving the purpose of improving the playback quality of the multi-channel surround sound system for the dual-channel stereo.

[0083] Optionally, in the above embodiment, when there is a third category of sound between the first dividing line and the second dividing line, for a sixth sound in the third category of sound, a playback signal of the sixth sound is determined based on a playback signal of a first sound in the first category of sound and a playback signal of a fifth sound in the second category of sound, and the sixth sound is set between the first sound and the fifth sound.

[0084] Referring to FIG. 2 , when there are other sounds between the first dividing line and the second dividing line, such as the sixth sound between the first and fifth sounds, the play signal of the sixth sound is determined according to the play signals of the first and fifth sounds. If the sixth sound is between the third and fourth sounds, the play signal of the sixth sound is determined according to the play signals of the third and fourth sounds.

[0085] By adopting this solution, the playback signal of the third type of audio is determined according to the playback signals of the first type of audio and the second type of audio, so as to achieve the purpose of quickly and accurately determining the playback signal of the third type of audio.

[0086] Optionally, in the above embodiment, when the above electronic device is a vehicle-mounted terminal and the above audio systems are arranged on the vehicle, the target position is the main driving position or the co-pilot position.

[0087] For example, when the target position is the main driving position, the driver can feel the high-quality sound effect. When the target position is the co-pilot position, the passenger in the co-pilot position can feel the high-quality sound effect.

[0088] In addition, the embodiment of the present application does not limit the location of the target position. In other feasible implementations, the target position may also be the position of the rear passengers, etc.

[0089] This solution can meet different needs by flexibly setting the target position, which is highly flexible.

[0090] Optionally, in the above embodiment, when there is a 0.1 channel, i.e., a low-frequency channel or a subwoofer channel, the electronic device determines the sum of the left path signal and the right path signal to obtain a total signal. After the total signal is multiplied by a preset parameter, it is input into a low-pass filter, and the output of the low-pass filter is used as the playback signal of the 0.1 channel. The preset parameters are, for example, 0.5, 0.707, etc., which are not limited in the embodiment of the present application.

[0091] Below, taking a multi-channel surround sound system including 5 channels as an example, the above-mentioned audio signal processing method is described in detail. Figure 4 , Figure 4 is another flow chart of the method for processing an audio signal provided in an embodiment of the present application. This embodiment includes:

[0092] 401. Input two-channel stereo to a multi-channel surround sound system.

[0093] Two-channel stereo includes left channel signal x L and the right path signal x R .

[0094] 402. Determine a single-channel signal according to a left-channel signal and a right-channel signal included in the dual-channel stereo.

[0095] Electronic device responds to left channel signal x L and the right path signal x R Perform an averaging operation to obtain a single-channel signal x C ,Right now

[0096] 403. Determine a human voice signal according to the single-channel signal.

[0097] Electronic devices convert single-channel signals x C Input the vocal separation network to get the vocal signal xC_vol . Human voice signal is also called human voice signal. Taking the U-type network based on deep learning as an example, the U-type network includes an encoding module (Encoder) and a decoding module (Decoder), as well as an intermediate layer that serves as a connection. Among them, there are, for example, 4 encoding modules and 4 decoding modules. The encoding module consists of residual convolution and average pooling, the decoding module consists of transposed convolution and residual convolution, and the intermediate layer consists of residual convolution.

[0098] During the separation process, the electronic device first performs short-time Fourier analysis on the dual-channel stereo signal to obtain a complex spectrum. Next, the electronic device determines the amplitude spectrum and the original phase based on the complex spectrum. Then, the amplitude spectrum is input into the U-type network output mask matrix, and the mask matrix is ​​multiplied with the complex spectrum of the original single-channel signal to obtain the output amplitude spectrum. Then, the electronic device uses the complex spectrum composed of the output amplitude spectrum and the original phase as the output complex spectrum, and performs short-time Fourier inverse transform on the output complex spectrum to obtain the human voice signal x C_vol .

[0099] It should be noted that although the U-shaped network is used as an example to illustrate how to separate the human voice signal, the embodiment of the present application is not limited thereto, and in other feasible implementations, any method may be used to separate the human voice signal from the single-channel signal.

[0100] 404. Determine an accompaniment signal according to the dual-channel stereo signal and the vocal signal.

[0101] The electronic device gets the human voice signal x C_vol Then, use the left path signal x L Subtract the vocal signal x C_vol , thus obtaining the left channel accompaniment signal x L_acc , using the right path signal x R Subtract the vocal signal x C_vol , thus obtaining the right channel accompaniment signal x R_acc That is: x L_acc =x L -x C_vol , x R_acc =x R -x C_vol .

[0102] It is understandable that the separation of the human voice signal in step 403 and the acquisition of the accompaniment signal in step 404 are applicable to various dual-channel stereos, such as pure music, pure speech or mixed sound. When the dual-channel stereo is pure music, the accompaniment signal is relatively strong and the human voice signal is relatively weak. When the dual-channel stereo is pure speech, the human voice signal is relatively strong and the accompaniment signal is relatively weak. When the dual-channel stereo is mixed sound, the strengths of the human voice signal and the accompaniment signal are similar.

[0103] 405. The electronic device determines the playback signals of the front left speaker, the front right speaker, and the center speaker according to the left channel signal, the right channel signal, and the single channel signal.

[0104] For example, the electronic device processes the left path signal x L , right path signal x R and a single-channel signal x C The mixing operation is performed according to the position of the listener. The purpose is to correct the sound image position and reduce the phenomenon of the center channel sound image being hollow. In the embodiment of the present application, the mixing operation is to adjust the amplitude and delay of the playback signal of each speaker according to the binaural positioning factor, so as to correct the unnatural hearing caused by asymmetric distance and asymmetric angle.

[0105] Please refer to Figure 2B , the first type of speakers include the front left speaker, the center speaker and the front right speaker. The distances of the three speakers relative to the target position are r1, r2, and r3 respectively. The angles relative to the target position are θ1, θ2, and θ3 respectively. The playback signals are S1, S2, and S3 respectively. Then:

[0106]

[0107] S2=x' C

[0108] S3=x R

[0109] x' C =αx C_vol +(1-α)(x C -x C_vol )

[0110] Among them, D(.,t) represents the delay operation, t represents the delay time, c represents the speed of sound, which can be approximately 340 m / s, and r3>r1, r2≥r1, α represents the preset first parameter, which can be adjusted, and the value range is, for example, between 0.5 and 1.

[0111] 406. The electronic device determines the playback signals of the rear left speaker and the rear right speaker according to the left channel accompaniment signal, the right channel accompaniment signal and the vocal signal.

[0112] Please refer to Figure 2B , the second type of speakers include the rear right speaker and the rear left speaker. The distances of the three speakers relative to the target position are r4 and r5, and the angles relative to the target position are θ4 and θ5, respectively. The playback signals are S4 and S5, respectively. Then:

[0113] S4=D(x' R_acc ,τ)

[0114]

[0115] x' L_acc =βx L_acc +(1-β)x L_vol

[0116] x' R_acc =βx R_acc +(1-β)x R_vol

[0117] Among them, D(.,t) represents a delay operation, t represents the delay time, c represents the speed of sound, which can be approximately 340 m / s, and r5>r4, β is an adjustable second parameter, and the value range is, for example, 0<β<1, or, 0.5<β<1, τ represents another adjustable parameter, and the value range is: τ>0.

[0118] It should be noted that there is no strict sequence between the above steps 405 and 406.

[0119] 407. The electronic device feeds the playback signals of each channel to the speakers of the corresponding channel respectively.

[0120] Please refer to Figure 2B The electronic device feeds S1, S2, S3, S4, S5 to speakers 21, 22, 23, 24, and 25, respectively.

[0121] It can be understood that in the above embodiment, S1, S4, and S5 are all delayed, that is, the delay is not 0, while S2 and S3 are not delayed, that is, the delay is 0. This is because the front left speaker is closer than the front right speaker, so the playback signal of the front left speaker is delayed so that the front left speaker and the front right speaker are played synchronously. The purpose of delaying the playback signal of the rear left speaker and the rear right speaker is to make the front left speaker and the front right speaker play first, and the rear left speaker and the rear right speaker play later, so that the listener can feel the surrounding feeling of the music.

[0122] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present application.

[0123] Figure 5 A schematic diagram of an audio signal processing device provided in an embodiment of the present application. The audio signal processing device 500 is integrated in an electronic device having a multi-channel surround sound system, and the audio signal processing device 500 includes: an acquisition module 51 and a processing module 52.

[0124] An acquisition module 51 is used to acquire dual-channel stereo sound to be played;

[0125] The processing module 52 is used to determine the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, the multi-channel surround sound system includes at least one pair of channels, and the sound of each channel in the pair of channels is asymmetrically arranged. The multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to the target position, and the target position is the listener's position.

[0126] In a feasible implementation, the processing module 52 is used to determine the amplitude and delay of the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, so as to obtain the playback signal of the corresponding sound.

[0127] In a feasible implementation, the processing module 52 is used to determine a first type of sound and a second type of sound from the multi-channel surround sound system according to multiple spatial positions, the first type of sound is located in front of a first dividing line, the first dividing line is located in front of the target position and the distance from the target position is a first preset distance, the second type of sound is located behind a second dividing line, the second dividing line is located behind the target position and the distance from the target position is a second preset distance; for the first type of sound, according to the spatial position of each sound in the first type of sound and the two-channel stereo, determine the amplitude and delay of the playback signal of each sound in the first type of sound to obtain the playback signal of the corresponding sound; for the second type of sound, according to the spatial position of each sound in the second type of sound and the two-channel stereo, determine the amplitude and delay of the playback signal of each sound in the second type of sound to obtain the playback signal of the corresponding sound.

[0128] In a feasible implementation, the processing module 52 is used for, when there is a second speaker in the first category of speakers, for the first speaker in the first category of speakers, according to the spatial position of each speaker in the first category of speakers, the path signal corresponding to the first speaker in the two-channel stereo, and the playback signal of the second speaker, determining the amplitude and delay of the playback signal of the first speaker to obtain the playback signal of the first speaker, wherein the first speaker is the speaker in the first category of speakers closest to the target position, and the second speaker is the speaker of the center channel; for the second speaker, determining the amplitude and delay of the playback signal of the second speaker according to the human voice signal, the single-channel signal and the preset first parameter to obtain the playback signal of the second speaker, wherein the delay of the playback signal of the second speaker is 0, and the human voice signal and the single-channel signal are determined according to the two-channel stereo; for the third speaker in the first category of speakers, determining the amplitude and delay of the playback signal of the third speaker according to the path signal corresponding to the third speaker in the two-channel stereo to obtain the playback signal of the third speaker, wherein the first speaker and the third speaker are a pair of speakers in the multi-channel surround sound system and are asymmetrically arranged.

[0129] In a feasible implementation, the processing module 52 is used to determine, for a fourth sound in the second category of sound, the amplitude and delay of the playback signal of the fourth sound according to the accompaniment signal, the human voice signal and the preset second parameter corresponding to the fourth sound, so as to obtain the playback signal of the fourth sound, wherein the fourth sound is the sound farthest from the target position in the second category of sound; for a fifth sound in the second category of sound, determine, according to the spatial position of each speaker in the second category of sound, the accompaniment signal corresponding to the fifth sound and the preset second parameter, the amplitude and delay of the playback signal of the fifth sound, so as to obtain the playback signal of the fifth sound, wherein the fifth sound and the fourth sound are a pair of sounds in the multi-channel surround sound system and are deployed asymmetrically.

[0130] In a feasible implementation, the processing module 52 is used to determine, when there is a third category of sound between the first dividing line and the second dividing line, a playback signal of the sixth sound in the third category of sound according to the playback signal of the first sound in the first category of sound and the playback signal of the fifth sound in the second category of sound, and the sixth sound is set between the first sound and the fifth sound.

[0131] In a feasible implementation, before the processing module 52 determines the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, it is also used to determine a single-channel signal according to the left-channel signal and the right-channel signal included in the two-channel stereo; determine a human voice signal according to the single-channel signal; determine a left-channel accompaniment signal according to the left-channel signal and the human voice signal; and determine a right-channel accompaniment signal according to the right-channel signal and the human voice signal.

[0132] In a feasible implementation, when the electronic device is a vehicle-mounted terminal, the target position is a main driving position or a co-pilot position.

[0133] The audio signal processing device provided in the embodiment of the present application can execute the actions of the electronic device in the above embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0134] Figure 6 This is a schematic diagram of the structure of the electronic device provided in the embodiment of the present application. Figure 6 The electronic device 600 described in the embodiment of the present application includes: at least one processor 61, at least one network interface 64, a user interface 63, a memory 65, and at least one communication bus 62.

[0135] The communication bus 62 is used to realize the connection and communication between these components.

[0136] The user interface 63 may include a display screen (Display) and a camera (Camera), and the optional user interface 63 may also include a standard wired interface and a wireless interface.

[0137] The network interface 64 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0138] Among them, the processor 61 may include one or more processing cores. The processor 61 uses various interfaces and lines to connect various parts of the entire electronic device 60, and executes various functions and processes data of the electronic device 60 by running or executing instructions, programs, code sets or instruction sets stored in the memory 65, and calling data stored in the memory 65. Optionally, the processor 61 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 61 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 61, and it can be implemented separately through a chip.

[0139] Among them, the memory 65 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 65 includes a non-transitory computer-readable storage medium. The memory 65 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 65 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned method embodiments, etc.; the data storage area may store data involved in the above-mentioned method embodiments, etc. The memory 65 may also be optionally at least one storage device located away from the aforementioned processor 61. As Figure 6 As shown, the memory 65 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an operating application of the electronic device.

[0140] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0141] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0142] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0144] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0145] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0146] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0147] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0148] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for processing an audio signal, characterized in that: Applied to an electronic device having a multi-channel surround sound system, the method comprises: Get the dual-channel stereo to be played; According to multiple spatial positions and the two-channel stereo, the playback signal of the sound of each channel in the multi-channel surround sound system is determined, the multi-channel surround sound system includes at least one pair of channels, and the sound of each channel in the pair of channels is asymmetrically arranged. The multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to the target position, and the target position is the listener's position.

2. The method according to claim 1, characterized in that The method of determining the playback signal of the sound of each channel in the multi-channel surround sound system according to the multiple spatial positions and the two-channel stereo sound comprises: According to the multiple spatial positions and the two-channel stereo, the amplitude and delay of the playback signal of the sound of each channel in the multi-channel surround sound system are determined to obtain the playback signal of the corresponding sound.

3. The method according to claim 2, characterized in that Determining the amplitude and delay of the playback signal of the sound of each channel in the multi-channel surround sound system according to the multiple spatial positions and the two-channel stereo sound to obtain the playback signal of the corresponding sound, includes: Determining a first type of sound and a second type of sound from the multi-channel surround sound system according to a plurality of spatial positions, wherein the first type of sound is located in front of a first dividing line, which is located in front of the target position and is at a first preset distance from the target position, and the second type of sound is located behind a second dividing line, which is located behind the target position and is at a second preset distance from the target position; For the first type of speakers, according to the spatial position of each speaker in the first type of speakers and the two-channel stereo, determine the amplitude and delay of the playback signal of each speaker in the first type of speakers to obtain the playback signal of the corresponding speaker; For the second type of speakers, the amplitude and delay of the playback signal of each speaker in the second type of speakers are determined according to the spatial position of each speaker in the second type of speakers and the two-channel stereo to obtain the playback signal of the corresponding speaker.

4. The method according to claim 3, characterized in that The step of determining the amplitude and delay of the playback signal of each speaker in the first category of speakers according to the spatial position of each speaker in the first category of speakers and the two-channel stereo sound to obtain the playback signal of the corresponding speaker includes: When there is a second speaker in the first category of speakers, for the first speaker in the first category of speakers, according to the spatial positions of the speakers in the first category of speakers, the channel signal corresponding to the first speaker in the two-channel stereo, and the playback signal of the second speaker, the amplitude and delay of the playback signal of the first speaker are determined to obtain the playback signal of the first speaker, wherein the first speaker is the speaker in the first category of speakers that is closest to the target position, and the second speaker is the speaker in the center channel; For the second sound box, the amplitude and delay of the playback signal of the second sound box are determined according to the human voice signal, the single-channel signal and the preset first parameter to obtain the playback signal of the second sound box, the delay of the playback signal of the second sound box is 0, and the human voice signal and the single-channel signal are determined according to the dual-channel stereo; For the third speaker in the first category of speakers, the amplitude and delay of the playback signal of the third speaker are determined according to the channel signal corresponding to the third speaker in the dual-channel stereo to obtain the playback signal of the third speaker. The first speaker and the third speaker are a pair of speakers in the multi-channel surround sound system and are deployed asymmetrically.

5. The method according to claim 3, characterized in that: The step of determining the amplitude and delay of the playback signal of each speaker in the second category of speakers according to the spatial position of each speaker in the second category of speakers and the two-channel stereo sound to obtain the playback signal of the corresponding speaker includes: For a fourth sound in the second category of sounds, determining the amplitude and delay of a playback signal of the fourth sound according to an accompaniment signal, a human voice signal and a preset second parameter corresponding to the fourth sound, so as to obtain a playback signal of the fourth sound, wherein the fourth sound is the sound farthest from the target position in the second category of sounds; For the fifth speaker in the second category of speakers, the amplitude and delay of the playback signal of the fifth speaker are determined according to the spatial position of each speaker in the second category of speakers, the accompaniment signal corresponding to the fifth speaker and the preset second parameter to obtain the playback signal of the fifth speaker. The fifth speaker and the fourth speaker are a pair of speakers in the multi-channel surround sound system and are deployed asymmetrically.

6. The method according to claim 3, characterized in that Also includes: When there is a third category of sound between the first dividing line and the second dividing line, for a sixth sound in the third category of sound, a playback signal of the sixth sound is determined according to a playback signal of a first sound in the first category of sound and a playback signal of a fifth sound in the second category of sound, and the sixth sound is set between the first sound and the fifth sound.

7. The method according to any one of claims 1 to 6, characterized in that: Before determining the playback signal of the sound of each channel in the multi-channel surround sound system according to the multiple spatial positions and the two-channel stereo, the method further includes: Determine a single-channel signal according to a left-channel signal and a right-channel signal included in the dual-channel stereo; Determine a human voice signal according to the single-channel signal; Determine a left-path accompaniment signal according to the left-path signal and the vocal signal; A right path accompaniment signal is determined according to the right path signal and the vocal signal.

8. The method according to any one of claims 1 to 6, characterized in that: When the electronic device is a vehicle-mounted terminal, the target position is a main driving position or a co-pilot position.

9. An audio signal processing device, characterized in that: Integrated in an electronic device having a multi-channel surround sound system, the device comprises: An acquisition module, used for acquiring dual-channel stereo sound to be played; A processing module is used to determine the playback signal of the sound of each channel in the multi-channel surround sound system according to multiple spatial positions and the two-channel stereo, the multi-channel surround sound system includes at least one pair of channels, the sound of each channel in the pair of channels is asymmetrically arranged, and the multiple spatial positions refer to the spatial positions of the sound of each channel in the multi-channel surround sound system relative to a target position, and the target position is a listener's position.

10. An electronic device comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the electronic device implements the method according to any one of claims 1 to 8.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

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