CN110072172B - Audio signal output method and system, electronic equipment and readable medium - Google Patents
Audio signal output method and system, electronic equipment and readable medium Download PDFInfo
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- CN110072172B CN110072172B CN201910341137.6A CN201910341137A CN110072172B CN 110072172 B CN110072172 B CN 110072172B CN 201910341137 A CN201910341137 A CN 201910341137A CN 110072172 B CN110072172 B CN 110072172B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
Abstract
The embodiment of the invention provides an audio signal output method and an audio system, wherein position information of ears of a user is obtained, each preset path of loudspeakers corresponding to the ears of the user is adjusted to a target angle according to the position information, the target angle is the angle of a sound field right in front of the user, audio signals aiming at the user are obtained, each path of loudspeakers are controlled to face the sound field with the target angle in front of the user to output the audio signals, and therefore the angle of each path of loudspeakers is adjusted through obtaining the position information of the ears of the user, the loudspeakers face the target angle to output the audio signals, the sound field is positioned right in front of the user, a sound field with depth feeling is formed, and the user can enjoy music in a car in an ideal sound field.
Description
Technical Field
The present invention relates to the field of automotive audio processing technologies, and in particular, to an audio signal output method and an audio signal output apparatus.
Background
The traditional automobile is not provided with a headrest type loudspeaker generally, and although a head-pillow type loudspeaker is arranged on an individual automobile, the automobile is mainly used for answering a call, enjoying music in a small range and the like. The headrest speakers are typically positioned at the rear or both sides of the occupant's ears so that the sound field is positioned in the middle or behind the occupant's head, similar to the sound field positioning of headphones. The sound field with the depth feeling is real and has high appreciation value, so that the user can enjoy the music in the car in the ideal sound field. Therefore, the current automobile audio technology is difficult to meet the requirements of users on vehicle-mounted music appreciation.
Disclosure of Invention
In view of the above problems, embodiments of the present invention are proposed to provide an output method of an audio signal and a corresponding output apparatus of an audio signal that overcome or at least partially solve the above problems.
In order to solve the above problem, an embodiment of the present invention discloses an audio signal output method, including:
acquiring position information of the ears of a user;
adjusting preset paths of loudspeakers corresponding to the human ears to target angles according to the position information, wherein the target angles are angles of a sound field right in front of the user;
and acquiring an audio signal aiming at the user, and controlling the loudspeakers to output the audio signal towards a sound field with the target angle in front of the user.
Optionally, the adjusting, according to the position information, preset each path of speakers corresponding to the human ear to a target angle includes:
extracting first orientation information of the left ear of the user and second orientation information of the right ear of the user from the position information;
determining a first location point for a left ear of the user using the first orientation information;
determining a second positioning point for the right ear of the user by adopting the second orientation information;
calculating target angles for the loudspeakers of all paths by adopting the first positioning point and the second positioning point;
and adjusting the loudspeakers to the target angle.
Optionally, the calculating a target angle for each path of the speaker by using the first positioning point and the second positioning point includes:
determining a first loudspeaker matched with the first positioning point and a second loudspeaker matched with the second positioning point from the loudspeakers;
calculating a first steering angle of the first speaker using the first localization point;
and calculating a second steering angle of the second loudspeaker by adopting the second positioning point.
Optionally, the adjusting the speakers to the target angle includes:
controlling the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
Optionally, the obtaining an audio signal for the user, and controlling the speakers to output the audio signal toward a sound field with the target angle directly in front of the user includes:
acquiring an audio signal for the user;
controlling the first speaker to output the audio signal toward a sound field directly in front of the user toward the first steering angle, and controlling the second speaker to output the audio signal toward a sound field directly in front of the user toward the second steering angle.
Optionally, the obtaining an audio signal for the user, and controlling the speakers to output the audio signal toward a sound field with the target angle directly in front of the user includes:
extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal;
carrying out high-frequency processing on the voice frequency band signal to obtain a target voice frequency band signal;
mixing the target human voice frequency band signal and the non-human voice frequency band signal to generate a first mixed signal;
amplifying the first mixed signal to obtain a second mixed signal;
and controlling the loudspeakers to face the target angle, and outputting the second mixed signal in a sound field right in front of the user.
Optionally, the controlling the speakers to face the target angle and outputting the second mixed signal in a sound field right in front of the user includes:
controlling the first speaker to output the second mixed signal toward a sound field directly in front of the user at the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field directly in front of the user at the second steering angle.
Optionally, the obtaining of the position information of the user's ear in the car seat includes:
acquiring image data shot by a preset camera, wherein the image data comprises a face image of the face of the user;
and extracting the position information of the ears of the user from the face image.
The embodiment of the invention also discloses an output method of the audio signal, which is applied to an audio system with a plurality of paths of loudspeakers, wherein the plurality of paths of loudspeakers are arranged on the automobile seat, and the method comprises the following steps:
acquiring position information of the ears of a user on the automobile seat through the audio system;
adjusting each path of loudspeaker corresponding to the human ear to a target angle according to the position information through the audio system, wherein the target angle is the angle of a sound field right in front of the user;
and controlling the loudspeakers to face the sound field with the target angle in front of the user to output preset audio signals through the audio system.
Optionally, the adjusting, by the audio system, each path of speaker corresponding to the human ear to a target angle according to the position information, where the target angle is an angle of a sound field right in front of the user, includes:
extracting, by the audio system, first orientation information of the user's left ear and second orientation information of the user's right ear from the location information;
determining, by the audio system, a first anchor point for a left ear of the user using the first orientation information;
determining, by the audio system, a second location point for the right ear of the user using the second orientation information;
calculating target angles for the loudspeakers of each path by adopting the first positioning point and the second positioning point through the audio system;
and adjusting the loudspeakers to the target angle through the audio system.
Optionally, the calculating, by the audio system, a target angle for each path of the speaker by using the first positioning point and the second positioning point includes:
determining a first loudspeaker matched with the first positioning point and a second loudspeaker matched with the second positioning point from the various paths of loudspeakers through the audio system;
calculating, by the audio system, a first steering angle of the first speaker using the first localization point;
and calculating a second steering angle of the second loudspeaker by adopting the second positioning point through the audio system.
Optionally, the adjusting, by the audio system, the each path of speaker to the target angle includes:
controlling, by the audio system, the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
Optionally, the controlling, by the audio system, the speakers to output preset audio signals toward a sound field with the target angle directly in front of the user includes:
controlling, by the audio system, the first speaker toward the first steering angle, and controlling the second speaker to output a preset audio signal toward a sound field at the second steering angle directly in front of the user.
Optionally, the controlling, by the audio system, the speakers to output preset audio signals toward a sound field with the target angle directly in front of the user includes:
extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal through the audio system;
carrying out high-frequency processing on the voice frequency band signal through the audio system to obtain a target voice frequency band signal;
mixing the target human voice frequency band signal and the non-human voice frequency band signal through the audio system to generate a first mixed signal;
amplifying the first mixed signal through the audio system to obtain a second mixed signal;
and controlling the loudspeakers to face the target angle through the audio system, and outputting the second mixed signal in a sound field right in front of the user.
Optionally, the controlling, by the audio system, the speakers to face the target angle, and outputting the second mixed signal in a sound field right in front of the user includes:
controlling, by the audio system, the first speaker toward the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field at the second steering angle directly in front of the user.
Optionally, the obtaining, by the audio system, the position information of the ear of the user in the car seat includes:
and receiving the position information of the ears of the user, which is sent by a preset camera, through the audio system, wherein the position information is information extracted from the shot facial image by the camera.
The embodiment of the invention also discloses an audio system, which comprises:
the information acquisition module is used for acquiring the position information of the ears of the user;
the angle adjusting module is used for adjusting preset loudspeakers corresponding to the human ears to a target angle according to the position information, wherein the target angle is the angle of a sound field right in front of the user;
and the signal output module is used for acquiring the audio signals for the user and controlling the loudspeakers to face the sound field with the target angle in front of the user to output the audio signals.
Optionally, the angle adjusting module includes:
the orientation information extraction submodule is used for extracting first orientation information of the left ear of the user and second orientation information of the right ear of the user from the position information;
a first location point determining submodule, configured to determine a first location point for a left ear of the user using the first orientation information;
a second location point determining submodule, configured to determine a second location point for the right ear of the user by using the second orientation information;
the target angle calculation submodule is used for calculating target angles aiming at the loudspeakers of all paths by adopting the first positioning point and the second positioning point;
and the angle adjusting submodule is used for adjusting the loudspeakers to the target angle.
Optionally, the target angle calculating submodule includes:
a speaker determining unit, configured to determine, from the multiple paths of speakers, a first speaker adapted to the first positioning point and a second speaker adapted to the second positioning point;
a first steering angle calculation unit for calculating a first steering angle of the first speaker using the first localization point;
and the second steering angle calculation unit is used for calculating a second steering angle of the second loudspeaker by adopting the second positioning point.
Optionally, the angle adjusting submodule is specifically configured to:
controlling the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
Optionally, the signal output module includes:
the signal source acquisition submodule is used for acquiring an audio signal aiming at the user;
a first signal output module for controlling the first speaker to face the first steering angle, and controlling the second speaker to output the audio signal toward a sound field right in front of the user at the second steering angle.
Optionally, the signal output module includes:
the frequency band signal extraction submodule is used for extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal;
the high-frequency processing submodule is used for carrying out high-frequency processing on the voice frequency band signal to obtain a target voice frequency band signal;
the signal mixing submodule is used for mixing the target human voice frequency band signal and the non-human voice frequency band signal to generate a first mixed signal;
the signal amplification submodule is used for amplifying the first mixed signal to obtain a second mixed signal;
and the second signal output submodule is used for controlling the loudspeakers to face the target angle and outputting the second mixed signal in a sound field right in front of the user.
Optionally, the second signal output submodule is specifically configured to:
controlling the first speaker to output the second mixed signal toward a sound field directly in front of the user at the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field directly in front of the user at the second steering angle.
Optionally, the information obtaining module includes:
the image data acquisition sub-module is used for acquiring image data shot by a preset camera, and the image data comprises a face image of the face of the user;
and the human ear information extraction submodule is used for extracting the position information of the human ears of the user from the face image.
The embodiment of the invention also discloses a device, which comprises:
one or more processors; and
one or more machine readable media having instructions stored thereon that, when executed by the one or more processors, cause the apparatus to perform one or more methods as described above.
Embodiments of the invention also disclose one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause the processors to perform one or more of the methods described above.
The embodiment of the invention has the following advantages:
in the embodiment of the invention, the position information of the ears of the user is obtained, the preset loudspeakers corresponding to the ears of the user are adjusted to the target angle according to the position information, the target angle is the angle of the sound field right in front of the user, the audio signal aiming at the user is obtained, the loudspeakers are controlled to face the target angle and output the audio signal in the sound field right in front of the user, and therefore, the angle of the loudspeakers is adjusted by obtaining the position information of the ears of the user, the loudspeakers face the target angle to output the audio signal, the sound field is positioned right in front of the user, a sound field with depth feeling is formed, and the user can enjoy music in the car in an ideal sound field.
Drawings
FIG. 1 is a flowchart illustrating a first embodiment of an audio signal output method according to the present invention;
FIG. 2 is a schematic diagram of positioning a sound field before adjusting the angle of a speaker according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the sound field positioning after the speaker angle adjustment according to the embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps of a second embodiment of an audio signal output method according to the present invention;
fig. 5 is a block diagram of an embodiment of an audio signal output apparatus according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
In order to better understand the method and system for outputting audio signals disclosed in the embodiments of the present invention, a speaker layout suitable for the embodiments of the present invention is first described below. The audio system disclosed by the embodiment of the invention comprises a plurality of paths of loudspeakers, wherein each path of loudspeaker can be arranged around the automobile seat and at least comprises a front direction, a rear direction, a left direction, a right direction, an upper direction, a lower direction and the like which take the automobile seat as a center; as an alternative embodiment, the speakers may be arranged at the following positions, respectively: the door, the front center console, the ceiling, the rear storage plate, the floor and the seat of the automobile; in particular, the speakers on the seat may be arranged at the seat headrest. By arranging the speakers capable of rotating in various directions centering on the seat, after a user sits on the seat, a three-dimensional sound field can be generated by the plurality of speakers arranged around the user, particularly, the speakers arranged on the ceiling and the floor, and a sound field effect that a sound source is positioned at the top and under the feet of the user can be created. The loudspeaker position layout disclosed by the embodiment of the invention can create a three-dimensional sound field for a user, and the user can feel a sound effect of 360-degree surrounding in the three-dimensional sound field compared with a two-dimensional plane sound field, so that the sound field is more real and natural.
Referring to fig. 1, a flowchart illustrating steps of a first embodiment of an audio signal output method according to the present invention is shown, which may specifically include the following steps:
in the embodiment of the invention, when a user enters a car to ride, the camera is controlled to shoot the face image containing the face of the user on the car seat, and the position of the human ear in the face image is identified from the face image through image processing modes such as edge detection, feature extraction and the like; or, the face image is used as the data input of the human ear recognition model, and the output of the human ear recognition model is the position of the human ear in the face image; the human ear recognition model is a deep neural network obtained by training a large number of facial images marked with human ears.
Because the position of the passenger is relatively fixed in the carriage, when the placement position of the camera in the automobile is known, the relative position of the camera and the human ear can be calculated according to the position of the human ear in the face image, and the position of the human ear in the automobile can be determined.
In an optional embodiment of the invention, when a user enters an automobile for riding, the ultrasonic transceiver module can transmit ultrasonic waves and receive reflected waves of the ultrasonic waves; by analyzing the reflected waves, possible human ears can be identified within the detection range of the ultrasonic waves, and the positions of the human ears can be determined.
in the embodiment of the invention, the layout position of each path of loudspeaker in the automobile is fixed and known according to the loudspeaker position layout, and each path of loudspeaker corresponding to the ear of the user can be adjusted to the target angle according to the position information of the ear of the user, wherein the target angle is the angle of a sound field right in front of the user, so that the loudspeaker can output audio signals towards the target direction by rotating the loudspeaker.
In an alternative embodiment of the present invention, step 102 may comprise the following sub-steps:
in the embodiment of the present invention, the first orientation information of the left ear of the user and the second orientation information of the right ear of the user may be extracted from the position information through the audio system, then the first orientation information may be adopted to determine the first positioning point for the left ear of the user, the second orientation information may be adopted to determine the second positioning point for the right ear of the user, then the first positioning point and the second positioning point are adopted to calculate the target angle for each path of speaker, and then each path of speaker may be adjusted to the target angle.
In one example of an embodiment of the present invention, an audio system may identify a position of a human ear in a face image from the face image, and then may determine first orientation information with an outer ear orientation of a left ear of a user and determine second orientation information with an outer ear orientation of a right ear of the user. After the first orientation information and the second orientation information are determined, the plane where the left ear is located can be taken as the bottom surface, a perpendicular line is drawn along the first orientation, a first positioning point is determined, and the plane where the right ear is located is taken as the bottom surface, a perpendicular line is drawn along the second orientation, and a second positioning point is determined.
In order to position the sound field right in front of the user, the position of the face of the user can be identified from the face image, a sound field positioning point is determined at a preset straight-line distance right in front of the user, and then the sound field positioning point can be connected with the first positioning point and the second positioning point to obtain a first adjusting line corresponding to the left ear and a second adjusting line corresponding to the right ear.
It should be noted that, in the embodiment of the present invention, the sound field positioning point is determined at the preset linear distance in front of the user, it can be understood that, according to actual needs, a person skilled in the art may set the preset linear distance, for example, a position 10cm in front of the user's eyebrow position is set as the sound field positioning point, or a position 8cm in front of the user's eyebrow position is set as the sound field positioning point, which is not limited by the present invention.
In the embodiment of the present invention, a first speaker adapted to a first positioning point and a second speaker adapted to a second positioning point may be determined from the speakers, and a first steering angle of the first speaker may be calculated using the first positioning point, and a second steering angle of the second speaker may be calculated using the second positioning point.
In a specific implementation, referring to fig. 2, a sound field positioning schematic diagram before speaker angle adjustment according to an embodiment of the present invention is shown, fig. 3 is a sound field positioning schematic diagram after speaker angle adjustment according to an embodiment of the present invention is shown, where a speaker corresponding to a user ear is a headrest speaker disposed on an automobile seat, the headrest speaker may include a left speaker and a right speaker, both of which may rotate at a certain angle, an original orientation angle of the left speaker and the right speaker is a front side, that is, a plane of the automobile seat facing the front side and perpendicular to a horizontal plane is used as a reference plane, and an angle perpendicular to the reference plane is used as an original orientation angle of the speaker. Specifically, the reference plane can be used as the bottom surface, the first perpendicular line is made along the original orientation angle of the left speaker, the first adjusting line is extended to be connected with the left speaker, the included angle between the first adjusting line and the first perpendicular line is used as a first steering angle, the original orientation angle of the right speaker is used as a second perpendicular line, the second adjusting line is extended to be connected with the right speaker, and the included angle between the second adjusting line and the second perpendicular line is used as a second steering angle. After the first steering angle adaptive to the left loudspeaker and the second steering angle adaptive to the right loudspeaker are obtained through calculation, the first loudspeaker can be controlled to rotate to the first steering angle through the audio system, and the second loudspeaker can be controlled to rotate to the second steering angle.
It should be noted that, in the embodiment of the present invention, the steering angle of the speaker is calculated in the above manner for example, and it is understood that, under the guidance of the embodiment of the present invention, a person skilled in the art may calculate the steering angle of the speaker in other manners, and the present invention is not limited to this.
And 103, acquiring an audio signal for the user, and controlling each path of loudspeaker to face a sound field with a target angle in front of the user to output the audio signal.
In the embodiment of the invention, after the steering angle corresponding to the loudspeaker is determined according to the acquired position information of the ear of the user and the loudspeaker is adjusted to the angle corresponding to the steering angle, the audio system can acquire the audio signal for the user and control the corresponding loudspeaker to output the audio signal towards the steering angle, so that a corresponding sound field is formed right in front of the user, a sound field with depth feeling is formed, and the user experience is improved. The audio signal may be a music audio signal, a news audio signal, a video audio signal, or the like.
In one example of an embodiment of the present invention, step 103 may include the following sub-steps:
the audio system extracts a human sound frequency band signal and a non-human sound frequency band signal from an audio signal, performs high-frequency processing on the human sound frequency band signal to obtain a target human sound frequency band signal, mixes the target human sound frequency band signal and the non-human sound frequency band signal to generate a first mixed signal, amplifies the first mixed signal to obtain a second mixed signal, controls a first loudspeaker to face a first steering angle, and controls a second loudspeaker to face a sound field with a second steering angle in front of a user to output the second mixed signal.
In a particular implementation, the audio signal may comprise a vocal range signal as well as a non-vocal range signal. After an audio system acquires audio signals according to user requirements, analog audio signals can be converted into digital audio signals, then human voice frequency Band signals in a range of 100Hz-1000Hz are extracted through a Band-pass Filter (BPF), other non-human voice audio signals are delayed, then real-time high-frequency even harmonic waves can be carried out on the extracted human voice frequency Band signals, the directivity of the human voice frequency Band signals is improved, a human voice sound field can be further concentrated right in front of a user, and then the processed human voice frequency Band signals and the non-human voice frequency Band signals are mixed to obtain first mixed signals. The audio system can further amplify the first mixed signal to obtain a second mixed signal, then control the first loudspeaker to face the first steering angle, and control the second loudspeaker to face the second steering angle to output the second mixed signal in the sound field in front of the user, thereby on one hand, through controlling the steering angle of the loudspeaker, the audio signal output by the loudspeaker forms the sound field in front of the user, on the other hand, through carrying out high multiple even harmonic on the human sound frequency range signal, the directivity of the human sound frequency range signal is improved, and then when the user enjoys music in the vehicle, the sound field can be positioned in front of the user, a sound field with depth is formed, an atmosphere of 'live concert' is created, the experience of enjoying music in the vehicle of the user is improved, and meanwhile, the loudspeaker is prevented from forming a 'strange and different' sound field.
In the embodiment of the invention, the position information of the ears of the user is obtained, the preset loudspeakers corresponding to the ears of the user are adjusted to the target angle according to the position information, the target angle is the angle of the sound field right in front of the user, the audio signal aiming at the user is obtained, the loudspeakers are controlled to face the target angle and output the audio signal in the sound field right in front of the user, and therefore, the angle of the loudspeakers is adjusted by obtaining the position information of the ears of the user, the loudspeakers face the target angle to output the audio signal, the sound field is positioned right in front of the user, a sound field with depth feeling is formed, and the user can enjoy music in the car in an ideal sound field.
Referring to fig. 4, a flowchart illustrating steps of a second embodiment of an audio signal output method according to the present invention is shown, and is applied to an audio system having multiple speakers, where the multiple speakers are disposed in a car seat, and the method specifically includes the following steps:
in the embodiment of the invention, an audio system can be connected with a camera, when a user sits in an automobile, the camera is controlled to shoot a facial image containing the face of the user on an automobile seat, and the position of the human ear in the facial image is identified from the facial image through image processing modes such as edge detection, feature extraction and the like; or, the facial image is input as data of the human ear recognition model, the output of the human ear recognition model is the position of the human ear in the facial image, then the camera can transmit the position information of the human ear of the user to the audio system, and the audio system controls the loudspeaker according to the position information. The human ear recognition model is a deep neural network obtained by training a large number of facial images marked with human ears.
Because the position of the passenger is relatively fixed in the carriage, when the placement position of the camera in the automobile is known, the relative position of the camera and the human ear can be calculated according to the position of the human ear in the face image, and the position of the human ear in the automobile can be determined.
in the embodiment of the invention, because the position of each path of loudspeaker arranged in the vehicle is fixed and known, the audio system can adjust each path of loudspeaker corresponding to the ear of the user to a target angle according to the position information of the ear of the user, wherein the target angle is the angle of a sound field right in front of the user, so that the loudspeaker can output audio signals towards a target direction by rotating the loudspeaker.
In an alternative embodiment of the present invention, where the audio system has an MCU central microcontroller, step 402 may comprise the following sub-steps:
in the embodiment of the invention, the audio system extracts first orientation information of a left ear of a user and second orientation information of a right ear of the user from position information through the MCU, then can adopt the first orientation information to determine a first positioning point aiming at the left ear of the user, adopts the second orientation information to determine a second positioning point aiming at the right ear of the user, then adopts the first positioning point and the second positioning point to calculate a target angle aiming at each path of loudspeaker, and then can adjust each path of loudspeaker to the target angle.
In a specific implementation, the audio system may determine, from the speakers, a first speaker adapted to the first positioning point and a second speaker adapted to the second positioning point, calculate, using the first positioning point, a first steering angle of the first speaker, and calculate, using the second positioning point, a second steering angle of the second speaker, so as to adjust the corresponding speaker to the target angle.
And step 403, controlling each path of loudspeaker to output preset audio signals towards the sound field with the target angle in front of the user through the audio system.
In the embodiment of the invention, when the audio system determines the steering angle corresponding to the loudspeaker according to the acquired position information of the ear of the user, and adjusts the loudspeaker to the angle corresponding to the steering angle, the audio signal for the user can be acquired, and the corresponding loudspeaker is controlled to output the audio signal towards the steering angle, so that a corresponding sound field is formed right in front of the user, a sound field with depth feeling is formed, and the user experience is improved. The audio signal may be a music audio signal, a news audio signal, a video audio signal, or the like.
In specific implementation, the audio system may further include a signal source module, an amplification module, a speaker module, a digital audio processing module, and the like, wherein the signal source module may obtain an audio signal and transmit the audio signal to the digital audio processing module, the digital audio processing module may convert an analog audio signal into a digital audio signal and perform frequency, amplitude, phase, and other processing on the digital audio signal, the amplification module may be configured to perform a method on the audio signal to push the speaker module to sound, and the speaker module may convert the audio signal into a sound signal and perform sound production.
In one example of the embodiment of the present invention, step 403 may include the following sub-steps:
the method comprises the steps of extracting human sound frequency band signals and non-human sound frequency band signals from audio signals through an audio system, carrying out high-frequency processing on the human sound frequency band signals to obtain target human sound frequency band signals, mixing the target human sound frequency band signals and the non-human sound frequency band signals to generate first mixed signals, amplifying the first mixed signals to obtain second mixed signals, controlling a first loudspeaker to face a first steering angle, and controlling a second loudspeaker to face a sound field of a second steering angle in front of a user to output the second mixed signals.
In a particular implementation, the audio signal may comprise a vocal range signal as well as a non-vocal range signal. The audio system acquires audio signals according to user requirements through a signal source, transmits the audio signals to a digital audio processing module, converts analog audio signals into digital audio signals through the digital audio processing module, extracts human frequency Band signals in a 100Hz-1000Hz interval through a Band-pass filter (BPF), delays the rest non-human audio signals, can perform real-time high-frequency even-number subharmonic on the extracted human frequency Band signals, improves the directivity of the human frequency Band signals, further enables a human sound field to be concentrated right in front of a user, and then mixes the processed human frequency Band signals and the non-human frequency Band signals to obtain a first mixed signal. Then the digital audio processing module can transmit the first mixed signal to the amplifying module, the amplifying module further amplifies the first mixed signal to obtain a second mixed signal, and transmits the second mixed signal to the loudspeaker module, after the loudspeaker module converts the second mixed signal into a sound signal, the MCU central microcontroller can control the first loudspeaker to face a first steering angle and control the second loudspeaker to face a second steering angle to output a second mixed signal in a sound field right in front of the user, so that on one hand, the audio signal output by the loudspeaker forms the sound field right in front of the user by controlling the steering angle of the loudspeaker, on the other hand, the directivity of the human sound frequency band signal is improved by carrying out high-order even harmonic on the human sound frequency band signal, and further, when the user enjoys music in the vehicle, the sound field can be positioned right in front of the user, a sound field with depth sense is formed, the atmosphere of a 'live concert' is created, the experience of enjoying music in a user car is improved, and meanwhile, the phenomenon that a loudspeaker forms a 'strange and different' sound field is avoided.
In the embodiment of the invention, the position information of the ears of the user is obtained, the preset loudspeakers corresponding to the ears of the user are adjusted to the target angle according to the position information, the target angle is the angle of the sound field right in front of the user, the audio signal aiming at the user is obtained, the loudspeakers are controlled to face the target angle and output the audio signal in the sound field right in front of the user, and therefore, the angle of the loudspeakers is adjusted by obtaining the position information of the ears of the user, the loudspeakers face the target angle to output the audio signal, the sound field is positioned right in front of the user, a sound field with depth feeling is formed, and the user can enjoy music in the car in an ideal sound field.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 5, a block diagram of an audio system according to an embodiment of the present invention is shown, which may specifically include the following modules:
an information obtaining module 501, configured to obtain position information of a user's ear;
an angle adjusting module 502, configured to adjust preset paths of speakers corresponding to the ears of the user to a target angle according to the position information, where the target angle is an angle of a sound field right in front of the user;
a signal output module 503, configured to acquire an audio signal for the user, and control the speakers to output the audio signal toward a sound field with the target angle directly in front of the user.
In an optional embodiment of the present invention, the angle adjusting module may include:
the orientation information extraction submodule is used for extracting first orientation information of the left ear of the user and second orientation information of the right ear of the user from the position information;
a first location point determining submodule, configured to determine a first location point for a left ear of the user using the first orientation information;
a second location point determining submodule, configured to determine a second location point for the right ear of the user by using the second orientation information;
the target angle calculation submodule is used for calculating target angles aiming at the loudspeakers of all paths by adopting the first positioning point and the second positioning point;
and the angle adjusting submodule is used for adjusting the loudspeakers to the target angle.
In an optional embodiment of the present invention, the target angle calculating sub-module may include:
a speaker determining unit, configured to determine, from the multiple paths of speakers, a first speaker adapted to the first positioning point and a second speaker adapted to the second positioning point;
a first steering angle calculation unit for calculating a first steering angle of the first speaker using the first localization point;
and the second steering angle calculation unit is used for calculating a second steering angle of the second loudspeaker by adopting the second positioning point.
In an optional embodiment of the present invention, the angle adjustment sub-module may be specifically configured to:
controlling the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
In an optional embodiment of the present invention, the signal output module may include:
the signal source acquisition submodule is used for acquiring an audio signal aiming at the user;
a first signal output module for controlling the first speaker to face the first steering angle, and controlling the second speaker to output the audio signal toward a sound field right in front of the user at the second steering angle.
In an optional embodiment of the present invention, the signal output module may include:
the frequency band signal extraction submodule is used for extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal;
the high-frequency processing submodule is used for carrying out high-frequency processing on the voice frequency band signal to obtain a target voice frequency band signal;
the signal mixing submodule is used for mixing the target human voice frequency band signal and the non-human voice frequency band signal to generate a first mixed signal;
the signal amplification submodule is used for amplifying the first mixed signal to obtain a second mixed signal;
and the second signal output submodule is used for controlling the loudspeakers to face the target angle and outputting the second mixed signal in a sound field right in front of the user.
In an optional embodiment of the present invention, the second signal output submodule may be specifically configured to:
controlling the first speaker to output the second mixed signal toward a sound field directly in front of the user at the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field directly in front of the user at the second steering angle.
In an optional embodiment of the present invention, the information obtaining module may include:
the image data acquisition sub-module is used for acquiring image data shot by a preset camera, and the image data comprises a face image of the face of the user;
and the human ear information extraction submodule is used for extracting the position information of the human ears of the user from the face image.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
An embodiment of the present invention further provides an electronic device, including:
one or more processors; and
one or more machine-readable media having instructions stored thereon, which when executed by the one or more processors, cause the electronic device to perform methods as described in embodiments of the invention.
Embodiments of the invention also provide one or more machine-readable media having instructions stored thereon, which when executed by one or more processors, cause the processors to perform the methods described in embodiments of the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, EEPROM, Flash, eMMC, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The foregoing detailed description of an audio signal output method and an audio system provided by the present invention has been presented, and the principles and embodiments of the present invention are explained herein by using specific examples, which are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (20)
1. An output method of an audio signal, comprising:
acquiring position information of the ears of a user;
adjusting preset paths of loudspeakers corresponding to the human ears to target angles according to the position information, wherein the target angles are angles of a sound field right in front of the user;
acquiring an audio signal for the user, and controlling the loudspeakers to output the audio signal towards a sound field with the target angle in front of the user;
wherein, each path of loudspeaker is arranged on the automobile seat;
wherein, according to the position information, adjust each way of speaker of presetting that corresponds with the people's ear to the target angle, include:
extracting first orientation information of the left ear of the user and second orientation information of the right ear of the user from the position information;
determining a first location point for a left ear of the user using the first orientation information;
determining a second positioning point for the right ear of the user by adopting the second orientation information;
calculating target angles for the loudspeakers of all paths by adopting the first positioning point and the second positioning point;
adjusting the loudspeakers to the target angle;
wherein, the calculating the target angle for each path of speaker by using the first positioning point and the second positioning point includes:
acquiring sound field positioning points for the user and reference surfaces for all paths of loudspeakers, wherein the sound field positioning points are positioning points which are positioned in the front of the user by a preset linear distance, and the reference surfaces are planes which are positioned in the front of the automobile seat and are perpendicular to a horizontal plane;
respectively connecting the first positioning point and the second positioning point with the sound field positioning point to obtain a first adjusting line aiming at the first loudspeaker and a second adjusting line aiming at the second loudspeaker;
determining a first perpendicular to the first speaker and a second perpendicular to the second speaker along the original orientation of the first speaker and the second speaker, the first perpendicular and the second perpendicular being perpendicular to the reference plane;
extending the first adjusting line to be connected with a first loudspeaker, and taking an included angle between an extension line of the first adjusting line and the first perpendicular line as a first steering angle of the first loudspeaker;
and extending the second adjusting line to be connected with a second loudspeaker, and taking an included angle between the extension line of the second adjusting line and the second perpendicular line as a second steering angle of the second loudspeaker.
2. The method of claim 1, wherein said adjusting the respective speaker to the target angle comprises:
controlling the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
3. The method of claim 2, wherein the obtaining the audio signal for the user, and controlling the speakers to output the audio signal toward a sound field with the target angle directly in front of the user comprises:
acquiring an audio signal for the user;
controlling the first speaker to output the audio signal toward a sound field directly in front of the user toward the first steering angle, and controlling the second speaker to output the audio signal toward a sound field directly in front of the user toward the second steering angle.
4. The method according to claim 1 or 3, wherein the obtaining an audio signal for the user, and controlling the speakers to output the audio signal toward a sound field with the target angle in front of the user comprises:
extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal;
carrying out high-frequency processing on the voice frequency band signal to obtain a target voice frequency band signal;
mixing the target human voice frequency band signal and the non-human voice frequency band signal to generate a first mixed signal;
amplifying the first mixed signal to obtain a second mixed signal;
and controlling the loudspeakers to face the target angle, and outputting the second mixed signal in a sound field right in front of the user.
5. The method of claim 4, wherein said controlling the speakers to output the second mixed signal toward the target angle in a sound field directly in front of the user comprises:
controlling the first speaker to output the second mixed signal toward a sound field directly in front of the user at the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field directly in front of the user at the second steering angle.
6. The method of claim 1, wherein the obtaining of the position information of the user's ear in the car seat comprises:
acquiring image data shot by a preset camera, wherein the image data comprises a face image of the face of the user;
and extracting the position information of the ears of the user from the face image.
7. An output method of an audio signal, applied to an audio system having a plurality of speakers disposed in a seat of a vehicle, includes:
acquiring position information of the ears of a user on the automobile seat through the audio system;
adjusting each path of loudspeaker corresponding to the human ear to a target angle according to the position information through the audio system, wherein the target angle is the angle of a sound field right in front of the user;
controlling the loudspeakers to face the sound field with the target angle in front of the user to output preset audio signals through the audio system;
wherein, the adjusting, by the audio system, each path of speaker corresponding to the human ear to a target angle according to the position information, the target angle being an angle of a sound field right in front of the user, includes:
extracting, by the audio system, first orientation information of the user's left ear and second orientation information of the user's right ear from the location information;
determining, by the audio system, a first anchor point for a left ear of the user using the first orientation information;
determining, by the audio system, a second location point for the right ear of the user using the second orientation information;
calculating target angles for the loudspeakers of each path by adopting the first positioning point and the second positioning point through the audio system;
adjusting the loudspeakers to the target angle through the audio system;
wherein the calculating the target angle for each path of speaker by the audio system using the first localization point and the second localization point includes:
acquiring sound field positioning points for the user and reference surfaces for all paths of loudspeakers through the audio system, wherein the sound field positioning points are positioning points which are positioned in front of the user and have preset linear distances, and the reference surfaces are planes which are positioned in front of the automobile seat and are perpendicular to a horizontal plane;
respectively connecting the first positioning point and the second positioning point with the sound field positioning point through the audio system to obtain a first adjusting line aiming at the first loudspeaker and a second adjusting line aiming at the second loudspeaker;
determining, by the audio system, a first perpendicular to the first speaker and a second perpendicular to the second speaker from the original orientation along the first speaker and the second speaker, the first perpendicular and the second perpendicular being perpendicular to the reference plane;
extending the first adjusting line to be connected with a first loudspeaker through the audio system, and taking an included angle between the extension line of the first adjusting line and the first perpendicular line as a first steering angle of the first loudspeaker;
through audio system will the second adjustment line extends to be connected with the second speaker, will the extension line of second adjustment line with contained angle between the second perpendicular is regarded as the second steering angle of second speaker.
8. The method of claim 7, wherein said adjusting, by the audio system, the respective speaker to the target angle comprises:
controlling, by the audio system, the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
9. The method of claim 8, wherein said controlling, by the audio system, the loudspeakers to output preset audio signals toward a sound field with the target angle directly in front of the user comprises:
controlling, by the audio system, the first speaker toward the first steering angle, and controlling the second speaker to output a preset audio signal toward a sound field at the second steering angle directly in front of the user.
10. The method according to claim 7 or 9, wherein said controlling, by the audio system, the speakers to output preset audio signals toward a sound field with the target angle directly in front of the user comprises:
extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal through the audio system;
carrying out high-frequency processing on the voice frequency band signal through the audio system to obtain a target voice frequency band signal;
mixing the target human voice frequency band signal and the non-human voice frequency band signal through the audio system to generate a first mixed signal;
amplifying the first mixed signal through the audio system to obtain a second mixed signal;
and controlling the loudspeakers to face the target angle through the audio system, and outputting the second mixed signal in a sound field right in front of the user.
11. The method of claim 10, wherein said controlling the speakers by the audio system toward the target angle outputs the second mixed signal in a sound field directly in front of the user, comprising:
controlling, by the audio system, the first speaker toward the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field at the second steering angle directly in front of the user.
12. The method of claim 7, wherein the obtaining, by the audio system, the position information of the user's ear in the car seat comprises:
and receiving the position information of the ears of the user, which is sent by a preset camera, through the audio system, wherein the position information is information extracted from the shot facial image by the camera.
13. An audio system, comprising:
the information acquisition module is used for acquiring the position information of the ears of the user;
the angle adjusting module is used for adjusting preset loudspeakers corresponding to the human ears to a target angle according to the position information, wherein the target angle is the angle of a sound field right in front of the user;
the signal output module is used for acquiring an audio signal for the user and controlling the loudspeakers to output the audio signal towards a sound field with the target angle in front of the user;
wherein, the angle adjustment module includes:
the orientation information extraction submodule is used for extracting first orientation information of the left ear of the user and second orientation information of the right ear of the user from the position information;
a first location point determining submodule, configured to determine a first location point for a left ear of the user using the first orientation information;
a second location point determining submodule, configured to determine a second location point for the right ear of the user by using the second orientation information;
the target angle calculation submodule is used for calculating target angles aiming at the loudspeakers of all paths by adopting the first positioning point and the second positioning point;
the angle adjusting submodule is used for adjusting the loudspeakers to the target angle;
each path of loudspeaker comprises a first loudspeaker and a second loudspeaker;
wherein the target angle calculation submodule is specifically configured to:
acquiring sound field positioning points for the user and reference surfaces for all paths of loudspeakers, wherein the sound field positioning points are positioning points which are positioned in the front of the user by a preset linear distance, and the reference surfaces are planes which are positioned in the front of the automobile seat and are perpendicular to a horizontal plane;
respectively connecting the first positioning point and the second positioning point with the sound field positioning point to obtain a first adjusting line aiming at the first loudspeaker and a second adjusting line aiming at the second loudspeaker;
determining a first perpendicular to the first speaker and a second perpendicular to the second speaker along the original orientation of the first speaker and the second speaker, the first perpendicular and the second perpendicular being perpendicular to the reference plane;
extending the first adjusting line to be connected with a first loudspeaker, and taking an included angle between an extension line of the first adjusting line and the first perpendicular line as a first steering angle of the first loudspeaker;
and extending the second adjusting line to be connected with a second loudspeaker, and taking an included angle between the extension line of the second adjusting line and the second perpendicular line as a second steering angle of the second loudspeaker.
14. The system of claim 13, wherein the angle adjustment submodule is specifically configured to:
controlling the first speaker to rotate to the first steering angle; and controlling the second speaker to rotate to the second steering angle.
15. The system of claim 14, wherein the signal output module comprises:
the signal source acquisition submodule is used for acquiring an audio signal aiming at the user;
a first signal output module for controlling the first speaker to face the first steering angle, and controlling the second speaker to output the audio signal toward a sound field right in front of the user at the second steering angle.
16. The system of claim 13 or 15, wherein the signal output module comprises:
the frequency band signal extraction submodule is used for extracting a human voice frequency band signal and a non-human voice frequency band signal from the audio signal;
the high-frequency processing submodule is used for carrying out high-frequency processing on the voice frequency band signal to obtain a target voice frequency band signal;
the signal mixing submodule is used for mixing the target human voice frequency band signal and the non-human voice frequency band signal to generate a first mixed signal;
the signal amplification submodule is used for amplifying the first mixed signal to obtain a second mixed signal;
and the second signal output submodule is used for controlling the loudspeakers to face the target angle and outputting the second mixed signal in a sound field right in front of the user.
17. The system of claim 16, wherein the second signal output submodule is specifically configured to:
controlling the first speaker to output the second mixed signal toward a sound field directly in front of the user at the first steering angle, and controlling the second speaker to output the second mixed signal toward a sound field directly in front of the user at the second steering angle.
18. The system of claim 13, wherein the information acquisition module comprises:
the image data acquisition sub-module is used for acquiring image data shot by a preset camera, and the image data comprises a face image of the face of the user;
and the human ear information extraction submodule is used for extracting the position information of the human ears of the user from the face image.
19. An electronic device, comprising:
one or more processors; and
one or more machine-readable media having instructions stored thereon that, when executed by the one or more processors, cause the electronic device to perform the method of one or more of claims 1-6 or 7-12.
20. A machine-readable medium having stored thereon instructions, which when executed by one or more processors, cause the processors to perform the method of one or more of claims 1-6 or 7-12.
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| CN112261188A (en) * | 2020-10-23 | 2021-01-22 | 维沃移动通信有限公司 | Electronic device, sound field adjusting method, and sound field adjusting apparatus |
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