CN117676420A - Method and device for calibrating sound effects of left and right sound boxes of home theater and computer storage medium - Google Patents
Method and device for calibrating sound effects of left and right sound boxes of home theater and computer storage medium Download PDFInfo
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Abstract
The application relates to the field of audio and video data processing, and provides a method and a device for calibrating sound effects of left and right sound boxes of a home theater and a computer storage medium. The method comprises the following steps: transmitting ultra-wideband signals to left and right sound boxes of audio receiving and transmitting equipment of the home theater system when the positions of the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system are changed, wherein the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line of the optimal video viewing point and the audio receiving and transmitting equipment; positioning left and right sound boxes of the audio receiving and transmitting equipment based on feedback information of the ultra-wideband signals to obtain distances between the left and right sound boxes and a target position where a user is located; and resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting the original sound effects of the left and right sound boxes by simulating the virtual sound source according to the target position of the user. According to the technical scheme, the optimal sound effect can be automatically set for the user of the home theater system.
Description
Technical Field
The present disclosure relates to the field of audio and video data processing, and in particular, to a method and apparatus for calibrating audio effects of left and right speakers in a home theater, and a computer storage medium.
Background
Home theater systems refer to theater systems that are delivered to one room in the home to enable users to enjoy programs at home. Home theater systems are composed of image devices such as projectors, projection screens (e.g., large screen TVs), plasma display screens, and digital televisions, as well as various audio devices. Home theater systems are capable of realizing high image quality on a screen, reproducing macro scenes and sound effects as appreciated in theaters, and thus are favored by more and more ordinary households.
The audio transceiving equipment of the home theater system is generally disposed below the video display equipment and interacts data with the video display equipment. The audio transceiver corresponds to a main control module or a built-in main control module, and is used for adjusting the sound effects of various sound boxes around the audio transceiver, relative to various sound boxes around the audio transceiver (such as a front sound box, a middle sound box, a rear sound box, a subwoofer, and the like). In general, for a certain specification of video display device of a home theater system, it has an optimal viewpoint, i.e., the user has the best experience in viewing the video of the video display device at that location. The sound effects of the left and right sound boxes are particularly important for the hearing experience of the user on both sides of the center line formed by the optimal viewpoint and the audio receiving and transmitting equipment.
In the initial setting, the user can feel the best sound effect provided by the left sound box and the right sound box at the best view point, however, the user is not positioned at the best view point due to furniture such as a sofa at the best view point, or the user can not enjoy the best sound effect due to the moving position of the left sound box and/or the right sound box.
Disclosure of Invention
The application provides a method, a device and a computer storage medium for calibrating sound effects of left and right sound boxes of a home theater, which can automatically set optimal sound effects for users of the home theater system.
In one aspect, the present application provides a method for calibrating sound effects of left and right speakers of a home theater, where the method includes:
transmitting ultra-wideband signals to left and right sound boxes of audio receiving and transmitting equipment of a home theater system when the positions of the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system are changed, wherein the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line between the optimal viewing point and the audio receiving and transmitting equipment;
positioning left and right sound boxes of the audio receiving and transmitting equipment based on the feedback information of the ultra-wideband signals to obtain the distance between the left and right sound boxes and the target position of the user, wherein the target position of the user is the position of the user at the optimal film watching point of the home theater system after the position of the user is changed;
Resetting sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting original sound effects of the left and right sound boxes by simulating virtual sound sources according to the target position of the user.
On the other hand, the application provides a audio calibration device of audio amplifier about home theater, the device includes:
the transmitting module is used for transmitting ultra-wideband signals to the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system when the positions of the user at the optimal viewing point of the home theater system and/or the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system change, and the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line between the optimal viewing point and the audio receiving and transmitting equipment;
the positioning module is used for positioning the left sound box and the right sound box of the audio receiving and transmitting equipment based on the feedback information of the ultra-wideband signal to obtain the distance between the left sound box and the right sound box and the target position of the user, wherein the target position of the user is the position of the user at the optimal viewpoint of the home theater system after the position of the user is changed;
and the adjusting module is used for resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting the original sound effects of the left and right sound boxes by simulating a virtual sound source according to the target position of the user.
In a third aspect, the present application provides an apparatus, where the apparatus includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the steps of the technical solution of the method for calibrating sound effects of left and right speakers in a home theater are implemented when the processor executes the computer program.
In a fourth aspect, the present application provides a computer storage medium, where a computer program is stored, where the computer program when executed by a processor implements the steps of the technical solution of the method for calibrating sound effects of left and right speakers in a home theater as described above.
According to the technical scheme provided by the application, when the positions of the user at the optimal watching point of the home theater system and/or the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system change, ultra-wideband signals are transmitted to the left and right sound boxes of the audio receiving and transmitting equipment, the left and right sound boxes of the audio receiving and transmitting equipment are positioned based on feedback information of the ultra-wideband signals, the distance between the left and right sound boxes and the target position is obtained, the sound effects of the left and right sound boxes are reset according to the distance between the left and right sound boxes and the target position of the user, or the original sound effects of the left and right sound boxes are adjusted by simulating virtual sound sources according to the target position of the user. Because the left sound box and the right sound box of the audio receiving and transmitting equipment can be accurately positioned through the ultra-wideband signal, the user can still enjoy the optimal sound effect when the position of the user changes or the position of the left sound box and the right sound box is changed no matter the sound effect of the left sound box and the right sound box is reset or the original sound effect of the left sound box and the right sound box is adjusted through simulating the virtual sound source.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for calibrating sound effects of left and right speakers of a home theater according to an embodiment of the present application;
fig. 2 is a schematic diagram of a home theater system provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a layout of left and right speakers of an audio transceiver of a home theater system according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a change in an optimal viewpoint of a home theater system according to an embodiment of the present application;
fig. 5 is a schematic diagram of a left speaker position variation of a home theater system audio transceiver provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of a sound effect calibration device for left and right speakers of a home theater according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In this specification, adjectives such as first and second may be used solely to distinguish one element or action from another element or action without necessarily requiring or implying any actual such relationship or order. Where the environment permits, reference to an element or component or step (etc.) should not be construed as limited to only one of the element, component, or step, but may be one or more of the element, component, or step, etc.
In the present specification, for convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual scale.
The audio transceiving equipment of the home theater system is generally disposed below the video display equipment and interacts data with the video display equipment. The audio transceiver corresponds to a main control module or a built-in main control module, and is used for adjusting the sound effects of various sound boxes around the audio transceiver, relative to various sound boxes around the audio transceiver (such as a front sound box, a middle sound box, a rear sound box, a subwoofer, and the like). In general, for a certain specification of video display device of a home theater system, it has an optimal viewpoint, i.e., the user has the best experience in viewing the video of the video display device at that location. The sound effects of the left and right sound boxes are particularly important for the hearing experience of the user on both sides of the center line formed by the optimal viewpoint and the audio receiving and transmitting equipment. In the initial setting, the user can feel the best sound effect provided by the left sound box and the right sound box at the best view point, however, the user is not positioned at the best view point due to furniture such as a sofa at the best view point, or the user can not enjoy the best sound effect due to the moving position of the left sound box and/or the right sound box.
In order to solve the above-mentioned problems of the prior art illustrated in fig. 1, the present application proposes a method for calibrating sound effects of left and right speakers of a home theater, which may use an audio transceiver of a home theater system as an execution subject, and a flowchart thereof is shown in fig. 1, and mainly includes steps S101 to S103, which are described in detail below:
step S101: and when the positions of the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system and/or the user at the optimal viewing point of the home theater system change, transmitting ultra-wideband signals to the left and right sound boxes of the audio receiving and transmitting equipment, wherein the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connecting line of the optimal viewing point and the audio receiving and transmitting equipment.
As shown in fig. 2, the application scenario of the present application, i.e. a home theater system, mainly includes a video display device, an audio transceiver device, and various speakers, where the video device may be a television or a projector for decoding a video signal and displaying a video image, and the audio transceiver device is responsible for decoding received audio data and sending the decoded audio data to the speakers around the audio transceiver device, and the audio signals are amplified by the speakers and played to a user. Further, the audio transceiver may be a bar-type sound equipment (sound bar) with a positioning module based on Ultra Wide Band (UWB) technology; the sound box around the audio receiving and transmitting equipment is also internally provided with a positioning module based on UWB technology, and the positioning module and the sound box can interact through UWB signals. Because of the high time resolution characteristic of UWB signals, i.e., UWB signals are a series of very short pulses, they are well suited for scenes where the area of an average household is not large, but where accurate positioning of the device is required.
In the home theater system illustrated in fig. 2, there is a so-called optimum viewpoint, that is, a position where a user can enjoy an optimum viewing effect in a space where the home theater system is disposed. In general, this optimal viewpoint is already calibrated at the time of shipment of the home theater system or set according to the space where the home theater system is to be deployed, for example, the optimal viewpoint may be 3.5 meters directly in front of the video equipment of the home theater system. As shown in fig. 3, when the optimum viewpoint and the audio transmitting/receiving device of the home theater system are connected in a line, speakers located on the left and right sides of the connection of the optimum viewpoint and the audio transmitting/receiving device, i.e., left and right speakers of the audio transmitting/receiving device. The location of the user at the optimal viewpoint of the home theater system has changed for various reasons. For example, as shown in fig. 4, after the sofa at the optimal viewing point is moved, the user may change the optimal viewing point from the position a to the position B, or the positions of the left and right speakers of the audio transceiver of the home theater system may change, for example, the audio transceiver may be inadvertently moved while cleaning, as shown in fig. 5, the left speaker of the audio transceiver may change from the position C to the position D, or both of the above may occur, which may cause the relative positions of the left and right speakers of the audio transceiver of the home theater system and the optimal viewing point of the home theater system to change (the distance, angle, and other data after the change are shown by the dashed lines in the figure), so that the user may not enjoy the optimal viewing effect any more. At this time, it is first necessary to relocate the left and right speakers of the audio transceiver, i.e., speakers located at the left and right sides of the connection line of the audio transceiver with the optimal viewpoint. As described above, the audio transceiver and the surrounding speakers are each provided with the UWB module, which is a positioning module based on UWB technology, so that when the positions of the left and right speakers of the audio transceiver of the home theater system are changed, the ultra wideband signals can be transmitted to the left and right speakers of the audio transceiver.
Step S102: and positioning left and right sound boxes of the audio receiving and transmitting equipment based on feedback information of the ultra-wideband signals to obtain distances between the left and right sound boxes and target positions of users, wherein the target positions of the users are positions of users at the optimal movie watching point of the home theater system after the positions of the users are changed.
As an embodiment of the present application, positioning the left and right speakers of the audio transceiver based on the feedback information of the ultra wideband signal, to obtain the distance between the left and right speakers and the target position where the user is located may be implemented through steps S1021 to S1023, which is described in detail below:
step S1021: and synchronizing clocks of the audio receiving and transmitting equipment and the left and right sound boxes.
If the accurate distance between the left and right sound boxes and the target position of the user is to be obtained, the sending time of the ultra-wideband signal and the receiving and transmitting time of the response signal of the ultra-wideband signal which are needed to be used in the subsequent calculation must be accurate, and the accuracy of the time must be established on the basis of the same clock, or the clock of the audio receiving and transmitting equipment and the clock of the sound boxes around the audio receiving and transmitting equipment must be synchronized. Therefore, in order to improve the accuracy of positioning the left and right sound boxes of the audio transceiver, that is, to obtain the accurate distance between the left and right sound boxes and the target position where the user is located, in the embodiment of the application, the clocks of the audio transceiver and the left and right sound boxes can be synchronized first.
As an embodiment of the present application, clocks of the synchronous audio transceiver and the left and right speakers may be: the audio transceiver device periodically transmits synchronization information, such as a time synchronization signal or a beacon, to the left and right sound boxes, wherein the synchronization information comprises system time information of the audio transceiver device; the left sound box and the right sound box receive the synchronous information and record the moment of receiving the synchronous information, namely the receiving moment; the left sound box and the right sound box calculate clock deviation with the audio receiving and transmitting equipment according to the received system time information, and adjust own clocks to synchronize with the clocks of the audio receiving and transmitting equipment; further, when clock deviation with the audio receiving and transmitting equipment is calculated, the left sound box and the right sound box can send response signals to the audio receiving and transmitting equipment, and round trip propagation time is further corrected; recording time stamps when the audio receiving and transmitting equipment and the left and right sound boxes send and receive signals; by comparing the time stamps, more accurate propagation times and clock deviations can be calculated.
In order to further improve accuracy of clock synchronization, as an embodiment of the present application, clocks of the synchronous audio transceiver and the left and right speakers may further be: initializing state estimation values of the time stamp, including setting initial values of clock deviation and drift rate, an initial error covariance matrix and the like, wherein the information reflects uncertainty of initial estimation; based on UWB signals interacted between the audio receiving and transmitting equipment and the left and right sound boxes, measuring time stamps, and recording communication time between the audio receiving and transmitting equipment and the left and right sound boxes; predicting the state of the next time stamp (namely clock deviation and drift of the audio receiving and transmitting equipment and the left and right sound boxes) by using a state transition model, and updating an error covariance matrix to reflect the uncertainty increase in the prediction process; when new timestamp measurement is received, calculating a measurement residual, namely the difference between an actual measurement value and a predicted value, calculating a weight factor for adjusting the predicted trust level and the trust level of the measurement residual, updating state estimation, applying the weight factor and the measurement residual to the predicted state, and updating an error covariance matrix to reflect new estimation errors; the steps of predicting and updating are continuously executed, and the estimation of the state of the time stamp (namely, the clock deviation and drift of the audio transceiver and the left and right sound boxes) is continuously adjusted along with each new time stamp measurement until the estimation error reaches a preset value or the number of recursion cycles reaches a set value.
Step S1022: and calculating the distance between the audio receiving and transmitting equipment and the left and right sound boxes after clock synchronization based on the sending time of the ultra-wideband signal and the receiving and transmitting time of the response signal of the ultra-wideband signal.
Specifically, based on the sending time of the ultra-wideband signal and the receiving and sending time of the response signal of the ultra-wideband signal, the distance between the audio receiving and sending device and the left and right sound boxes after clock synchronization is calculated may be: calculating the unidirectional propagation time of the ultra-wideband signal according to the time when the audio receiving and transmitting equipment sends the ultra-wideband signal, the time when the left and right sound boxes receive the ultra-wideband signal and the time when the audio receiving and transmitting equipment receives the response signal of the left and right sound boxes to the ultra-wideband signal, and multiplying the unidirectional propagation time by the propagation speed of the ultra-wideband signal, namely the light speed, wherein the product is the distance between the audio receiving and transmitting equipment and the left and right sound boxes.
Step S1023: and calculating the distance between the left sound box and the right sound box and the target position of the user according to the distance between the audio receiving and transmitting equipment and the left sound box and the right sound box.
In this embodiment of the present application, a user may hold a remote controller, in which a positioning module based on UWB technology is built, and by interacting with an audio transceiver, the distance between the target position where the user is located and the audio transceiver may also be calculated by adopting the method similar to the positioning of the left and right speakers, and then, according to the distance between the audio transceiver and the left and right speakers and the distance between the audio transceiver and the target position where the user is located, the distance between the left and right speakers and the target position where the user is located may be calculated.
Step S103: and resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting the original sound effects of the left and right sound boxes by simulating the virtual sound source according to the target position.
As an embodiment of the present application, according to the distance between the left and right speakers and the target position where the user is located, resetting the sound effects of the left and right speakers may be implemented through steps S1031 to S1033, which is described in detail as follows:
step S1031: and readjusting the volume of the left and right sound boxes and the time delay of the sound signals reaching the target position of the user according to the distance between the left and right sound boxes and the target position of the user.
Generally, the adjustment of the volume follows the principle that the closer the distance is, the smaller the volume is, and similarly, the adjustment of the delay follows the principle that the closer the distance is, the smaller the delay is. For example, if the distance between the left sound box and the target position of the user is closer than the distance between the right sound box and the target position of the user, the volume of the left sound box is properly reduced, so that the intensity of the sound signals of the left sound box and the right sound box at the target position of the user is close, and discomfort is not caused to ears of the user; for another example, if the distance between the left sound box and the target position of the user is closer than the distance between the right sound box and the target position of the user, the time delay of the sound signal of the left sound box reaching the target position of the user is properly reduced, so that the sound signals of the left sound box and the right sound box can synchronously reach the target position of the user.
Step S1032: and collecting response data of the test signal in the space where the user is located by playing a preset test signal, wherein the response data of the test signal in the space where the user is located comprises response data of the test signal in a target position where the user is located.
Specifically, preset test signals are played, and a pickup device (e.g., a microphone) collects responses of the preset test signals at a plurality of positions in a space where a user is located. It should be noted that the preset test signal is a specially designed audio track, and generally includes a series of signals of frequency scanning (from low frequency to high frequency) and possibly common signals for acoustic testing such as white noise or pink noise, etc., which can excite various acoustic phenomena in the space where the user is located, and in order to capture acoustic reactions (including direct sound and reflected sound of sound, etc.) of various positions in the space where the user is located and frequency response changes due to different objects and surfaces in the space where the user is located, the responses of these preset test signals can be collected at a plurality of positions in the space where the user is located by a sound pickup device (for example, a microphone built in the system or an external microphone).
Step S1033: and analyzing response data of the test signal in the space of the user, and readjusting parameters of the equalizer of the left and right sound boxes according to the analysis result.
Specifically, the response data of the test signal in the space where the user is located may be transmitted to an analysis engine (typically a digital signal processor or special software), and the analysis engine evaluates the response data of the preset test signal captured in each position of the space where the user is located in the space where the user is located, and determines the non-uniformity of the frequency response. The analysis result of the analysis engine is used for generating an equalizer curve, and aims to compensate the room effect by increasing or decreasing the gain of a specific frequency, so that more balanced and natural sound playing is realized; the generated equalizer curves are automatically applied to the left and right sound boxes, and output is adjusted to optimize the acoustic performance of the space where the user is located; the above process can be repeatedly executed, that is, the preset test signal is replayed and the response data of the preset test signal in the space where the user is located is captured again, so as to verify whether the parameter setting of the equalizer achieves the expected effect, and further adjust until the optimal effect is achieved.
As an embodiment of the present application, according to the target position of the user, the original sound effects of the left and right speakers may be adjusted by simulating the virtual sound source through steps S '1031 to S'1033, which is described in detail as follows:
Step S'1031: and determining a virtual sound source corresponding to the target position of the user according to the target position of the user.
It should be noted that, the virtual sound source refers to a sound source point created in the perception of the listener by the audio processing technology, and does not necessarily correspond to a physical speaker position. The position of the virtual sound source can be set according to the requirements of the audio content, for example, in a movie, if a car passes from the right side of the screen, even if there are only two sound boxes physically left and right, the perception that the sound appears to move from the right side to the left side of the screen can be created by the algorithmic processing. Since the position of the virtual sound source is generally based on the principle of sound localization by the human ear, that is, the time difference (the human ear can detect the time difference that the sound reaches two ears, and this time difference enables us to localize the direction of the sound source) and the intensity difference (the sound received by the ear far away from the sound source will be weaker than the ear near one side due to the blocking effect of the head, so as to generate the intensity difference), the position of the virtual sound source can be reconstructed by using an algorithm to simulate the two effects, therefore, in the embodiment of the present application, the correspondence between each position in the space where the user is located and the virtual sound source can be preset in advance, and thus, the virtual sound source corresponding to the target position where the user is located can be determined according to the target position where the user is located and the correspondence.
Step S'1032: a digital filter corresponding to the virtual sound source is selected.
The digital filter corresponding to the virtual sound source is a function for audio signal processing that simulates the filtering effect of sound due to body parts such as the head, ear shape, shoulders, etc., before reaching the left and right ears of a person. Specifically, a digital filter corresponding to the virtual sound source may be selected from a standard digital filter database.
Step S'1033: digital filters corresponding to the virtual sound sources are applied to the audio signals output by the left and right speakers to tune the original sound effects of the left and right speakers.
It should be noted that, applying a digital filter corresponding to a virtual sound source to audio signals output from left and right speakers essentially performs convolution operation on filter data and audio signals output from left and right speakers, and simulates the influence of sound waves before reaching ears, so as to calibrate the original sound effects of left and right speakers, where the filter data refers to sound propagation characteristics specific to the shape of the head and ears of a user's individual, and usually exists in the form of impulse responses, and these data describe how the sound is filtered and changed when the sound reaches the user's individual ears from different directions due to the occlusion and reflection of the head, ears, and other parts of the body.
Considering that sound boxes, namely a left sound box and a right sound box, are disposed on the left side and the right side of the connection line of the optimal viewpoint and the audio transceiver, the acoustic signals of the left sound box and the right sound box may generate cross-talk or echo at the target position where the user is located, in the embodiment of the present application, the method of the foregoing embodiment may further include: according to the target position of the user, eliminating crosstalk of audio signals output by the left sound box and the right sound box at the target position of the user through sound beam forming; and/or according to the target position of the user, canceling the echo of the audio signals output by the left sound box and the right sound box at the target position of the user through acoustic echo. Specifically, according to the target position of the user, the crosstalk of the audio signals output by the left and right speakers at the target position of the user can be eliminated by sound beam forming: according to the target position of the user, calculating the distance between the left and right sound boxes and the left and right ears of the user; according to the distance between the left and right sound boxes and the left and right ears of the user, the crosstalk of the audio signals output by the left and right sound boxes at the target position of the user is eliminated by adjusting the phase and amplitude of the audio signals output by the left and right sound boxes. According to the target position of the user, the echo of the audio signal output by the acoustic echo cancellation left and right sound boxes at the target position of the user can be specifically: simulating an echo path of a space where a user is located through an adaptive filter according to a target position where the user is located; according to the echo path of the space where the user is located, estimating the echo of the audio signal output by the left sound box and the right sound box at the target position where the user is located; and subtracting the echo of the target position of the user from the audio signals output by the left sound box and the right sound box.
As can be seen from the above-mentioned calibration method for audio effects of left and right speakers of a home theater illustrated in fig. 1, when the positions of a user at an optimal viewing point of the home theater system and/or the positions of left and right speakers of an audio transceiver of the home theater system change, an ultra-wideband signal is transmitted to the left and right speakers of the audio transceiver, the left and right speakers of the audio transceiver are positioned based on feedback information of the ultra-wideband signal, so as to obtain distances between the left and right speakers and a target position, and according to the distances between the left and right speakers and the target position where the user is located, the audio effects of the left and right speakers are reset, or according to the target position where the user is located, the original audio effects of the left and right speakers are calibrated by simulating a virtual sound source. Because the left sound box and the right sound box of the audio receiving and transmitting equipment can be accurately positioned through the ultra-wideband signal, the user can still enjoy the optimal sound effect when the position of the user changes or the position of the left sound box and the right sound box is changed no matter the sound effect of the left sound box and the right sound box is reset or the original sound effect of the left sound box and the right sound box is adjusted through simulating the virtual sound source.
Please refer to fig. 6, which is a device for calibrating sound effects of left and right speakers of a home theater according to an embodiment of the present application, where the device may include a transmitting module 601, a positioning module 602, and an adjusting module 603, which are described in detail below:
The transmitting module 601 is configured to transmit an ultra-wideband signal to left and right speakers of an audio transceiver device of a home theater system when a user at an optimal viewpoint of the home theater system and/or positions of the left and right speakers of the audio transceiver device change, where the left and right speakers of the audio transceiver device are located at left and right sides of a connection line between the optimal viewpoint and the audio transceiver device;
the positioning module 602 is configured to position the left and right speakers of the audio transceiver based on feedback information of the ultra-wideband signal, so as to obtain distances between the left and right speakers and a target position where a user is located, where the target position where the user is located is a position where the position of the user located at an optimal viewpoint of the home theater system is changed;
the adjusting module 603 is configured to reset the sound effects of the left and right speakers according to the distance between the left and right speakers and the target position where the user is located, or adjust the original sound effects of the left and right speakers by simulating the virtual sound source according to the target position where the user is located.
As can be seen from the above-mentioned audio calibration device for left and right speakers of home theater illustrated in fig. 6, when the positions of the user at the optimal viewpoint of the home theater system and/or the left and right speakers of the audio transceiver of the home theater system change, an ultra-wideband signal is transmitted to the left and right speakers of the audio transceiver, the left and right speakers of the audio transceiver are positioned based on feedback information of the ultra-wideband signal, so as to obtain distances between the left and right speakers and the target position, and according to the distances between the left and right speakers and the target position where the user is located, the audio of the left and right speakers is reset, or according to the target position where the user is located, the original audio of the left and right speakers is calibrated by simulating a virtual sound source. Because the left sound box and the right sound box of the audio receiving and transmitting equipment can be accurately positioned through the ultra-wideband signal, the user can still enjoy the optimal sound effect when the position of the user changes or the position of the left sound box and the right sound box is changed no matter the sound effect of the left sound box and the right sound box is reset or the original sound effect of the left sound box and the right sound box is adjusted through simulating the virtual sound source.
Fig. 7 is a schematic structural diagram of an apparatus according to an embodiment of the present application. As shown in fig. 7, the apparatus 7 of this embodiment mainly includes: a processor 70, a memory 71 and a computer program 72 stored in the memory 71 and executable on the processor 70, such as a program for a home theater left and right speaker sound effect calibration method. The processor 70 executes the computer program 72 to implement the steps of the above-described embodiment of the home theater sound effect calibration method, such as steps S101 to S107 shown in fig. 1. Alternatively, the processor 70, when executing the computer program 72, performs the functions of the modules/units of the apparatus embodiments described above, such as the functions of the transmitting module 601, the positioning module 602, and the adjusting module 603 shown in fig. 6.
Illustratively, the computer program 72 of the home theater left and right speaker sound effect calibration method mainly includes: transmitting ultra-wideband signals to left and right sound boxes of audio receiving and transmitting equipment of the home theater system when the positions of the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system are changed, wherein the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line of the optimal video viewing point and the audio receiving and transmitting equipment; positioning left and right sound boxes of the audio receiving and transmitting equipment based on feedback information of the ultra-wideband signals to obtain distances between the left and right sound boxes and target positions of users, wherein the target positions of the users are positions of the users at the optimal video watching points of the home theater system after the positions of the users are changed; and resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting the original sound effects of the left and right sound boxes by simulating the virtual sound source according to the target position of the user. The computer program 72 may be divided into one or more modules/units, which are stored in the memory 71 and executed by the processor 70 to complete the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing a specific function for describing the execution of the computer program 72 in the device 7. For example, the computer program 72 may be divided into functions of the transmitting module 601, the positioning module 602, and the adjusting module 603 (modules in the virtual device), each of which specifically functions as follows: the transmitting module 601 is configured to transmit an ultra-wideband signal to left and right speakers of an audio transceiver device of a home theater system when a user at an optimal viewpoint of the home theater system and/or positions of the left and right speakers of the audio transceiver device change, where the left and right speakers of the audio transceiver device are located at left and right sides of a connection line between the optimal viewpoint and the audio transceiver device; the positioning module 602 is configured to position the left and right speakers of the audio transceiver based on feedback information of the ultra-wideband signal, so as to obtain distances between the left and right speakers and a target position where a user is located, where the target position where the user is located is a position where the position of the user located at an optimal viewpoint of the home theater system is changed; the adjusting module 603 is configured to reset the sound effects of the left and right speakers according to the distance between the left and right speakers and the target position where the user is located, or adjust the original sound effects of the left and right speakers by simulating the virtual sound source according to the target position where the user is located.
The device 7 may include, but is not limited to, a processor 70, a memory 71. It will be appreciated by those skilled in the art that fig. 7 is merely an example of device 7 and is not intended to limit device 7, and may include more or fewer components than shown, or may combine certain components, or different components, e.g., a computing device may also include an input-output device, a network access device, a bus, etc.
The processor 70 may be a central processing unit (Central Processing Unit, CPU), or may be another general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 71 may be an internal storage unit of the device 7, such as a hard disk or a memory of the device 7. The memory 71 may also be an external storage device of the device 7, such as a plug-in hard disk provided on the device 7, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory 71 may also include both an internal storage unit of the device 7 and an external storage device. The memory 71 is used to store computer programs and other programs and data required by the device. The memory 71 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that the above-described functional units and modules are merely illustrated for convenience and brevity of description, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above device may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/device and method may be implemented in other manners. For example, the apparatus/device embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer storage medium. Based on such understanding, the implementation of all or part of the processes in the methods of the embodiments of the present application may also be accomplished by instructing related hardware by a computer program, where the computer program of the method for calibrating sound effects of left and right speakers of a home theater may be stored in a computer storage medium, where the computer program, when executed by a processor, may implement the steps of the embodiments of the methods of the present application, that is, locate, based on feedback information of an ultra wideband signal, peripheral speakers of an audio transceiver of the home theater system, to obtain positioning data of each speaker in the peripheral speakers of the audio transceiver; when a user is positioned at an optimal viewing point of the home theater system, calculating the relative position data of each sound box and the optimal viewing point according to the positioning data of each sound box in the peripheral sound boxes of the audio receiving and transmitting equipment; and adjusting the sound effect of each sound box according to the relative position data of each sound box and the optimal video watching point. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, executable files or in some intermediate form, etc. The computer storage medium may include: any entity or device capable of carrying computer program code, a recording medium, a USB flash disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth. It should be noted that the content of the computer storage medium may be appropriately scaled according to the requirements of jurisdictions in which such computer storage medium does not include electrical carrier signals and telecommunications signals, for example, according to jurisdictions and patent practices. The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. The foregoing detailed description of the embodiments has been presented for purposes of illustration and description, and it should be understood that the foregoing is by way of example only, and is not intended to limit the scope of the invention.
Claims (10)
1. A method for calibrating sound effects of left and right speakers of a home theater, the method comprising:
transmitting ultra-wideband signals to left and right sound boxes of audio receiving and transmitting equipment of a home theater system when the positions of the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system are changed, wherein the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line between the optimal viewing point and the audio receiving and transmitting equipment;
positioning left and right sound boxes of the audio receiving and transmitting equipment based on the feedback information of the ultra-wideband signals to obtain the distance between the left and right sound boxes and the target position of the user, wherein the target position of the user is the position of the user at the optimal film watching point of the home theater system after the position of the user is changed;
and resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target where the user is located, or adjusting the original sound effects of the left and right sound boxes by simulating a virtual sound source according to the target position where the user is located.
2. The method for calibrating sound effects of left and right speakers of home theater according to claim 1, wherein positioning left and right speakers of the audio transceiver based on the feedback information of the ultra-wideband signal to obtain distances between the left and right speakers and a target location where the user is located, comprises:
Synchronizing clocks of the audio receiving and transmitting equipment and the left and right sound boxes;
calculating the distance between the audio receiving and transmitting equipment and the left and right sound boxes after clock synchronization based on the sending time of the ultra-wideband signal and the receiving and transmitting time of the response signal of the ultra-wideband signal;
and calculating the distance between the left sound box and the right sound box and the target position of the user according to the distance between the audio receiving and transmitting equipment and the left sound box and the right sound box.
3. The method for calibrating sound effects of left and right speakers of home theater according to claim 1, wherein resetting sound effects of the left and right speakers according to a distance between the left and right speakers and a target position where the user is located comprises:
according to the distance between the left and right sound boxes and the target position of the user, readjusting the volume of the left and right sound boxes and the time delay of the sound signals reaching the target position of the user;
collecting response data of a test signal in a space where a user is located by playing a preset test signal, wherein the response data of the test signal in the space where the user is located comprises response data of the test signal in a target position where the user is located;
and analyzing the response data, and readjusting parameters of the equalizer of the left and right sound boxes according to the analysis result.
4. The method for calibrating sound effects of left and right speakers of home theater according to claim 1, wherein said calibrating original sound effects of said left and right speakers by simulating virtual sound sources according to a target position of said user comprises:
determining a virtual sound source corresponding to the target position of the user according to the target position of the user;
selecting a digital filter corresponding to the virtual sound source;
and applying digital filters corresponding to the virtual sound sources to the audio signals output by the left and right sound boxes so as to calibrate the original sound effects of the left and right sound boxes.
5. The home theater left and right speaker sound effect calibration method according to any one of claims 1 to 4, further comprising:
according to the target position of the user, eliminating crosstalk of the audio signals output by the left and right sound boxes at the target position of the user through sound beam forming; and/or
And according to the target position of the user, canceling the echo of the audio signals output by the left sound box and the right sound box at the target position of the user through acoustic echo.
6. The method for calibrating sound effects of left and right speakers of home theater according to claim 5, wherein said eliminating crosstalk of audio signals output from said left and right speakers at said target locations of said user by sound beam forming according to said target locations of said user comprises:
Calculating the distance between the left and right sound boxes and the left and right ears of the user according to the target position of the user;
and according to the distance between the left and right sound boxes and the left and right ears of the user, the crosstalk of the audio signals output by the left and right sound boxes at the target position of the user is eliminated by adjusting the phase and the amplitude of the audio signals output by the left and right sound boxes.
7. The method for calibrating sound effects of left and right speakers of home theater according to claim 5, wherein said canceling, by acoustic echo, the echo of the audio signal output from the left and right speakers at the target location of the user according to the target location of the user comprises:
simulating an echo path of a space where the user is located through an adaptive filter according to the target position where the user is located;
according to the echo path of the space where the user is located, estimating the echo of the audio signals output by the left sound box and the right sound box at the target position where the user is located;
and subtracting the echo of the target position of the user from the audio signals output by the left sound box and the right sound box.
8. A home theater left and right speaker sound effect calibration device, the device comprising:
the transmitting module is used for transmitting ultra-wideband signals to the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system when the positions of the user at the optimal viewing point of the home theater system and/or the left and right sound boxes of the audio receiving and transmitting equipment of the home theater system change, and the left and right sound boxes of the audio receiving and transmitting equipment are positioned at the left and right sides of a connection line between the optimal viewing point and the audio receiving and transmitting equipment;
The positioning module is used for positioning the left sound box and the right sound box of the audio receiving and transmitting equipment based on the feedback information of the ultra-wideband signal to obtain the distance between the left sound box and the right sound box and the target position of the user, wherein the target position of the user is the position of the user at the optimal viewpoint of the home theater system after the position of the user is changed;
and the adjusting module is used for resetting the sound effects of the left and right sound boxes according to the distance between the left and right sound boxes and the target position of the user, or adjusting the original sound effects of the left and right sound boxes by simulating a virtual sound source according to the target position of the user.
9. An apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when the computer program is executed by the processor.
10. A computer storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1 to 7.
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