CN114760574A - Audio playing method and laser projection equipment - Google Patents

Abstract

The application discloses an audio playback method and a laser projection device, which belong to the technical field of laser projection. The method includes: acquiring an audio signal to be played, the audio signal including an audio signal of a first frequency band and an audio signal of a second frequency band, the first frequency band is higher than the second frequency band, detecting whether the camera is in a shooting state, and when the camera is in a shooting state In the case of the state, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played. When the camera is in the shooting state, that is, when the user is using the social function, use a variety of methods to solve the problem of shaking and blurring of the camera shot caused by the shaking generated by the sound of the projection screen, and retain the effective information during the video call. The quality of the call makes the laser projection equipment have powerful functions such as large laser screen eye protection, screen sound and picture homology, and social real-time sharing.

Description

Audio playback method and laser projection equipment

technical field

The present application relates to the technical field of laser projection, and in particular, to an audio playback method and a laser projection device.

Background technique

With the continuous advancement of science and technology, laser projection equipment with screen sound function has increasingly entered people's lives. To make people's lives more convenient, these laser projection devices can also include cameras through which social functions can be performed.

In the related art, taking a laser TV with sound from the screen as an example, because the projection host included in the laser TV is placed at a low position, the camera as a social function is usually placed on the projection screen first. However, when using the social function on a laser TV with sound from the screen, the sound of the screen will cause the projection screen to vibrate, so that the picture captured by the camera will shake.

SUMMARY OF THE INVENTION

Embodiments of the present application provide an audio playback method and a laser projection device, which can solve the problem of camera vibration caused by playback of low-frequency audio signals in the related art. The technical solution is as follows:

In one aspect, an audio playback method is provided, the laser projection device includes a projection host and a projection screen, the projection screen has a camera, the projection screen is a sound-emitting screen, and the method includes:

acquiring an audio signal to be played, the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, the first frequency band is higher than the second frequency band;

Detecting whether the camera is in a shooting state;

When the camera is in a shooting state, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played.

In another aspect, a laser projection device is provided, the laser projection device includes a projection host and a projection screen, the projection screen has a camera, the projection screen is a sound-emitting screen, the projection host includes a processor, and the processing The device is used for:

acquiring an audio signal to be played, the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, the first frequency band is higher than the second frequency band;

Detecting whether the camera is in a shooting state;

When the camera is in a shooting state, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played.

In another aspect, an audio playback device is provided, the device comprising:

an acquisition module, configured to acquire an audio signal to be played, the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, and the first frequency band is higher than the second frequency band;

a detection module for detecting whether the camera is in a shooting state;

A playing module, configured to play the audio signal of the first frequency band but not the audio signal of the second frequency band through the projection screen when the camera is in a shooting state.

In another aspect, a computer-readable storage medium is provided, and a computer program is stored in the storage medium, and when the computer program is executed by a processor, the steps of the above-mentioned audio playback method are implemented.

In another aspect, there is provided a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the steps of the audio playback method described above.

The technical solutions provided in the embodiments of the present application can at least bring the following beneficial effects:

When the camera is in the shooting state, that is, when the user is using the social function, since the first frequency band is higher than the second frequency band, the audio signal of the first frequency band is played through the projection screen instead of the audio signal of the second frequency band. The audio signal in the frequency band will not cause the projection screen to vibrate, and it will not cause jitter and blur in the picture captured by the camera, so that the laser projection device has the functions of screen sound and social sharing at the same time.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of a laser projection device provided by an embodiment of the present application;

2 is a flowchart of an audio playback method provided by an embodiment of the present application;

3 is a schematic diagram of a frequency range of a human voice provided by an embodiment of the present application;

4 is a flowchart of an audio playback method provided by an embodiment of the present application;

5 is a schematic structural diagram of an audio playback device provided by an embodiment of the present application;

FIG. 6 is a structural block diagram of a laser projection device provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

Before the audio playback method provided by the embodiment of the present application is explained in detail, the laser projection device involved in the embodiment of the present application is first introduced.

Please refer to FIG. 1 , which is a schematic diagram of a laser projection apparatus according to an exemplary embodiment. The laser projection device includes a projection host 101 and a projection screen 102, and the projection screen 102 has a camera. The projection host 101 can communicate with the projection screen 102 . The communication connection may be a wired or wireless connection, which is not limited in this embodiment of the present application.

Wherein, the projection host 101 is usually installed on a desktop by a desktop installation, or is installed on a ceiling by a ceiling installation, and the projection screen 102 is usually installed on a wall. When displaying a picture, the projection host 101 is used for emitting laser light to the projection screen 102 based on the picture to be displayed, and the projection screen 102 is used for displaying the picture to be displayed. When playing the audio signal, the projection host 101 is used to send the audio signal to be played to the projection screen 102 , and the projection screen 102 plays the audio signal based on the built-in sounding unit to realize the screen sounding function.

When the social function is enabled in the laser projection device, the camera can be turned on, and the picture is captured by the camera and sent to the projection host 101, and the projection host 101 sends the received picture through the network. However, in the process of playing the audio signal on the projection screen 102, the low-frequency audio signal will cause the projection screen 102 to vibrate in a relatively large amount when the sound is emitted, and cause the camera on the projection screen 102 to shake, thereby causing the image captured by the camera. Shaking or blurring occurs. Therefore, the embodiment of the present application provides an audio playback method, through which the problem can be solved.

The social functions described above may be functions such as video chat, webcast, and music exchange. The social function can meet the social needs of users without leaving home, and achieve the most realistic audio-visual effects for users.

Those skilled in the art should understand that the above-mentioned functions of the projection host 101 and the projection screen 102 are only examples, and other existing or future functions, if applicable to the embodiments of the present application, should also be included in the protection of the embodiments of the present application. and is hereby incorporated by reference.

It should be noted that the laser projection equipment described in the embodiments of the present application is for the purpose of illustrating the technical solutions of the embodiments of the present application more clearly, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. With the evolution of technology, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

Next, the audio playback method provided by the embodiment of the present application will be explained in detail.

2 is a flowchart of an audio playback method provided by an embodiment of the present application. The method is applied to a laser projection device. The laser projection device includes a projection host and a projection screen. The projection screen has a camera, and the projection screen is a sound-emitting screen. Please refer to FIG. 2 , the method includes the following steps.

Step 201: Acquire an audio signal to be played, where the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, and the first frequency band is higher than the second frequency band.

The audio signal of the first frequency band refers to the audio signal whose frequency exceeds the frequency threshold, and the audio signal of the second frequency band refers to the audio signal whose frequency is lower than the frequency threshold. In layman's terms, the audio signal in the first frequency band refers to the audio signal in the middle and high frequency bands, and the audio signal in the second frequency band refers to the audio signal in the low frequency band.

In the embodiments of the present application, "exceeding" may be understood as greater than, and may also be understood as greater than or equal to. Where "more than" is understood as greater than, "below" is understood as less than or equal to. Where "more than" is understood as greater than or equal to, "less than" is understood as less than. Subsequent references to "over" and "under" can refer to this explanation.

The frequency threshold is set in advance, and the low frequency band and the middle and high frequency band can be divided by the frequency threshold. Moreover, when the size of the projection screen is different, the vibration generated by the screen sound function on the projection screen may be different, and then the vibration generated by the camera may be different. Therefore, in the actual application process, the frequency can also be determined according to the size of the projection screen. Thresholds are adjusted. For example, the frequency threshold can be set to 300 Hz (Hertz).

The audio signal to be played can be the sound of conversation between people, the sound of musical instruments when exchanging music, the background sound of video call, and so on.

Step 202: Detect whether the camera is in a shooting state.

The projection host of the laser projection device communicates with the camera, and the projection host can know whether the camera is in a shooting state.

For example, in a laser TV with a social function, the projection host of the laser TV communicates with the camera, and the projection host can know whether the camera is in a shooting state.

Step 203 : when the camera is in a shooting state, play the audio signal of the first frequency band but not the audio signal of the second frequency band through the projection screen.

That is, when the camera is in the shooting state, the current audio playback mode of the laser projection device is switched to the social voice mode. In the social voice mode, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played.

In some embodiments, when the camera is in a shooting state, the audio signal of the second frequency band can be directly deleted, and the audio signal of the first frequency band can be played through the projection screen.

When using the social function through the camera, it is mainly for conversation, so the conversation sound between people is the main sound produced in the social process. Usually, the frequency of the human voice is in the first frequency band, and deleting the audio signal of the second frequency band will not cause the audio signal of the dialogue between people to be lost. Therefore, when the camera is in the shooting state, the audio signal of the second frequency band can be directly deleted, and the audio signal of the first frequency band can be played through the projection screen. For example, as shown in Figure 3, the audio signal of the first frequency band refers to the audio signal with a frequency between 300Hz and 20K (Kilo, thousand) Hz, and the audio signal of the second frequency band refers to the audio frequency with a frequency between 30Hz and 300Hz. The frequency range of human voice is generally between 300Hz and 5KHz, that is, the frequency of human voice is in the first frequency band, so deleting the audio signal of the second frequency band will not cause the audio signal of the dialogue between people to be lost.

There are high-pass and low-pass filters in laser projection equipment. When the camera is in the shooting state, the audio signal of the first frequency band can be filtered out by a high-pass filter and played on the projection screen, the audio signal of the second frequency band can be filtered out by a low-pass filter, and the audio signal of the second frequency band can be filtered out Signal deletion, which is not limited in this embodiment of the present application.

In other embodiments, during the process of performing social functions through the camera, music may also be exchanged, such as playing a musical instrument. At this time, there may be valid information in the audio of the second frequency band, and direct deletion of the audio signal of the second frequency band will result in Loss of valid signal. Therefore, when the camera is in a shooting state, it can be detected whether there is a valid signal in the audio signal of the second frequency band. In the case that there is no valid signal in the audio signal of the second frequency band, the audio signal of the second frequency band is deleted, and the audio signal of the first frequency band is played through the projection screen. When there is a valid signal in the audio signal of the second frequency band, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is transferred to other devices for playback. Of course, it is also possible to directly transfer the audio signal of the second frequency band to other devices for playback without judging the valid signal.

Among them, there are two ways to detect whether there is a valid signal in the audio signal of the second frequency band, and the two implementation ways will be introduced next.

In a first implementation manner, the audio signal to be played is an audio signal generated in a video image captured by a camera. In this case, the video picture captured by the camera can be identified to determine whether there is a target action in the video picture, and if there is no target action in the video picture, it can be determined that there is no valid signal in the audio signal of the second frequency band . In the case that the target action exists in the video picture, it is determined that there is a valid signal in the audio signal of the second frequency band.

Among them, the target action refers to the action stored in the local or cloud space, which can be an action of playing a musical instrument or other actions that can produce sounds. This embodiment of the present application does not limit this.

Assuming that the target action is the action of playing an instrument, multiple video frames captured by the camera are identified to determine the type of the hand action and the musical instrument in the video image. Determine the corresponding playing action of the instrument from the corresponding relationship between the playing actions, and then determine whether the hand action in the video screen is consistent with the playing action of the recognized musical instrument, and the hand action in the video screen is consistent with the recognized playing action of the musical instrument. In the case that the playing actions of the musical instruments are consistent, it is determined that there is a musical instrument playing action in the video screen, and when the hand movements in the video screen are inconsistent with the recognized playing actions of the musical instrument, it is determined that there is no musical instrument playing in the video screen. play action.

Because different instruments have different shapes and different hand movements when playing different instruments. Therefore, it is possible to identify hand movements and the types of musical instruments in the video picture, so as to determine whether there is a musical instrument playing action in the video picture, and then determine whether there is a valid signal in the audio signal of the second frequency band.

Among them, there are many ways to recognize the hand movements and the categories of musical instruments in the video picture. As an example, the recognition can be performed through a neural network model, that is, the video picture is input into the neural network model to Get the hand motion output by the neural network model and the category of the musical instrument in the video.

The neural network model needs to be trained before using the neural network model for recognition. That is, multiple sample video segments are obtained, as well as the hand actions corresponding to each video segment and the category of the musical instrument in the video segment, the video segment is used as the input of the neural network model, and the category of the musical instrument and the hand motion are used as the neural network. The output of the model is used to train the neural network model.

In the second implementation manner, the audio signal to be played is an audio signal generated by playing a musical instrument. In this case, the frequency information of the audio signal of the second frequency band may be extracted, and if there is no musical instrument frequency information matching the frequency information of the audio signal of the second frequency band in the stored musical instrument frequency information, it is determined that the second frequency band There is no valid signal in the audio signal of the band. In the case where musical instrument frequency information matching the frequency information of the audio signal of the second frequency band exists in the stored musical instrument frequency information, it is determined that a valid signal exists in the audio signal of the second frequency band.

Since the frequencies of the sounds produced by each musical instrument when played have a relatively fixed frequency range, the frequency information of multiple musical instruments whose sound frequencies are in the second frequency band can be stored in advance. In this way, the frequency information of the audio signal of the second frequency band can be extracted and compared with the stored musical instrument frequency information to determine whether there is musical instrument frequency information matching the frequency information of the audio signal of the second frequency band in the stored musical instrument frequency information. , and then it can be determined whether there is a valid signal in the audio signal of the second frequency band.

Of course, the above two implementation manners can also be combined, so that the accuracy of identifying valid signals can be improved. That is, the video image captured by the camera is identified to determine whether there is a target action in the video image, the frequency information of the audio signal of the second frequency band is extracted, and it is determined whether there is a frequency of the audio signal of the second frequency band in the stored musical instrument frequency information. information to match the frequency information of the instrument. When the target action exists in the video picture and the stored musical instrument frequency information contains musical instrument frequency information matching the frequency information of the audio signal of the second frequency band, it is determined that a valid signal exists in the audio signal of the second frequency band. When there is no target action in the video picture or no musical instrument frequency information matching the frequency information of the audio signal of the second frequency band exists in the stored musical instrument frequency information, it is determined that there is no valid signal in the audio signal of the second frequency band.

When transferring the audio signal of the second frequency band to other devices for playback, there are two ways to play the audio signal of the first frequency band but not the audio signal of the second frequency band through the projection screen. introduce.

In the first implementation manner, in the case where the projection host has a speaker, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the speaker.

That is to say, when the camera is in the shooting state, the audio signal of the first frequency band can be filtered out from the audio signal to be played through a high-pass filter, and the second frequency band can be filtered out from the audio signal to be played through a low-pass filter. The audio signal of the frequency band, and then the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the speaker. In this way, the audio signal of the second frequency band will not vibrate the projection screen, and thus will not shake the image captured by the camera.

In the second implementation manner, when the projection host is connected with a subwoofer, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer.

That is to say, when the camera is in the shooting state, the audio signal of the first frequency band can be filtered out from the audio signal to be played through a high-pass filter, and the second frequency band can be filtered out from the audio signal to be played through a low-pass filter. The audio signal of the frequency band, and then the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer. In this way, the audio signal of the second frequency band will not vibrate the projection screen, and thus will not shake the image captured by the camera.

In the above description, when the audio signal of the first frequency band is played through the projection screen, the audio signal of the first frequency band can be sent to the built-in vibrator of the projection screen, and the vibrator generates vibration to drive the projection screen to vibrate and sound. This application implements The example does not limit the implementation process of the screen sound.

When the camera is in the shooting state, the way of playing the audio signal of the first frequency band through the projection screen without playing the audio signal of the second frequency band is an example, and other ways can also be used in practical application.

As an example, in the case of a sound box in the projection host, the audio signal of the first frequency band and the audio signal of the second frequency band are played through the sound box.

That is, the audio signal of the full frequency range is played through the speaker in the projection host without the need to play the audio signal through the projection screen. This method can effectively solve the problem of camera image shaking caused by the sound of the projection screen, and can also retain and play all the audio signals of the second frequency band.

As another example, when the projection host has a speaker and the projection host is connected with a subwoofer, the audio signal of the first frequency band and the audio signal of the second frequency band are played through the speaker, and the audio of the second frequency band is played through the subwoofer Signal.

That is, the audio signal of the full frequency band is played through the speaker in the projection host, and the audio signal of the second frequency band is played by the subwoofer, without the need to play the audio signal through the projection screen. This method can not only effectively solve the problem of camera shooting picture shake caused by the sound of the projection screen, but also retain and play all the audio signals of the second frequency band, and play the audio signals of the second frequency band through the subwoofer, which can The accent and bass are more perfectly reflected, and the audio playback effect is improved.

What is described above is the situation in which the audio signal of the first frequency band is played through the projection screen and the audio signal of the second frequency band is not played when the camera is in the shooting state. When the camera is not in the shooting state, the audio signal of the first frequency band and the audio signal of the second frequency band can be directly played through the projection screen. That is, a full-range audio signal is played through the projection screen.

Next, an audio playback method provided by an embodiment of the present application is introduced by taking FIG. 4 as an example. As shown in Figure 4, after the laser projection device is turned on, it is detected whether the camera is in a shooting state. When the camera is not in the shooting state, the audio signals of the first frequency band and the second frequency band are sent to the projection screen, that is, the audio signals of the whole frequency band are sent to the projection screen, and the audio signals are played by the projection screen. When the camera is in the shooting state, the projection host divides the audio signal to be played to obtain the audio signal of the first frequency band and the audio signal of the second frequency band, sends the audio signal of the first frequency band to the projection screen, and determines Whether the laser projection device is connected to a subwoofer, if the subwoofer is connected, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer.

In some embodiments, when the camera is in the shooting state, that is, in the process of using the social function, the image captured by the camera can also be recognized to determine the user's action, and based on the user's action, the projection screen's action can be adjusted based on the user's action. Sound control. For example, by recognizing the image captured by the camera, it is then determined that the user's action is a lateral ear action, and when it is determined that the user's lateral ear is the right ear, the volume of the right channel of the projection screen is increased, and the left side of the projection screen is maintained. The volume of the channel does not change to achieve sound effects that are close to strong and far weak.

In the embodiment of the present application, when the camera is in the shooting state, that is, when the user uses the social function, various methods are used to solve the problem of shaking and blurring of the picture captured by the camera caused by the shaking generated by the sound of the projection screen. Moreover, in some implementations, by analyzing the generated audio information and identifying the pictures captured by the camera, it is judged whether there is valid information in the generated second frequency band audio information, and then the second frequency band audio information is selected. Audio signals are deleted or transferred to other equipment. This not only effectively solves the problem of jittering and blurring of the image captured by the camera caused by the jitter of the projection screen, but also preserves the effective information during the video call to ensure the quality of the video call. And according to the method provided by the embodiment of the present application, the laser projection device can simultaneously have powerful functions such as large laser screen eye protection, screen sound and picture homology, and social real-time sharing.

FIG. 5 is a schematic structural diagram of an audio playback device provided by an embodiment of the present application. The audio playback device can be implemented by software, hardware, or a combination of the two to become part or all of the above-mentioned laser projection equipment. Please refer to FIG. 5. The device It includes: an acquisition module 501 , a detection module 502 and a playback module 503 .

The acquiring module 501 is configured to acquire an audio signal to be played, where the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, where the first frequency band is higher than the second frequency band. For the detailed implementation process, refer to the corresponding contents in the foregoing embodiments, which will not be repeated here.

The detection module 502 is used to detect whether the camera is in a shooting state. For the detailed implementation process, refer to the corresponding contents in the foregoing embodiments, which will not be repeated here.

The playing module 503 is configured to play the audio signal of the first frequency band but not the audio signal of the second frequency band through the projection screen when the camera is in a shooting state. For the detailed implementation process, refer to the corresponding contents in the foregoing embodiments, which will not be repeated here.

Optionally, the playback module 503 is specifically used for:

Detecting whether there is a valid signal in the audio signal of the second frequency band;

In the case that there is no valid signal in the audio signal of the second frequency band, the audio signal of the second frequency band is deleted, and the audio signal of the first frequency band is played through the projection screen.

Optionally, the playback module 503 is also specifically used for:

Identify the video image captured by the camera to determine whether there is a target action in the video image;

In the case that the target action does not exist in the video picture, it is determined that there is no valid signal in the audio signal of the second frequency band.

Optionally, the playback module 503 is also specifically used for:

Extract the frequency information of the audio signal of the second frequency band;

In the case where there is no musical instrument frequency information matching the frequency information of the audio signal of the second frequency band in the stored musical instrument frequency information, it is determined that no valid signal exists in the audio signal of the second frequency band.

Optionally, the playback module 503 is specifically used for:

In the case that the projection host has a speaker, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the speaker; or

When the projection host is connected with a subwoofer, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer.

In the embodiment of the present application, when the camera is in the shooting state, that is, when the user uses the social function, various methods are used to solve the problem of shaking and blurring of the picture captured by the camera caused by the shaking generated by the sound of the projection screen. Moreover, in some implementations, by analyzing the generated audio information and identifying the pictures captured by the camera, it is judged whether there is valid information in the generated second frequency band audio information, and then the second frequency band audio information is selected. Audio signals are deleted or transferred to other equipment. This not only effectively solves the problem of jittering and blurring of the image captured by the camera caused by the jitter of the projection screen, but also preserves the effective information during the video call to ensure the quality of the video call. And according to the method provided by the embodiment of the present application, the laser projection device can simultaneously have powerful functions such as large laser screen eye protection, screen sound and picture homology, and social real-time sharing.

It should be noted that: when the audio playback device provided by the above embodiment performs audio playback, only the division of the above functional modules is used for illustration. In practical applications, the above functions can be allocated according to different functional modules. That is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the audio playback device provided in the above embodiments and the audio playback method embodiments belong to the same concept, and the specific implementation process thereof is detailed in the method embodiments, which will not be repeated here.

FIG. 6 is a structural block diagram of a laser projection device 600 provided by an embodiment of the present application. The laser projection device 600 includes a projection host 601 and a projection screen 602 . The projection host 601 may include a processor 6011 and a memory 6012. Optionally, the projection host 601 may further include a remote pickup microphone, and the remote pickup microphone may be used for voice assistant and chat function sound collection. The projection screen 602 is used to display graphics, text, icons, video and other information. The projection screen 602 has a camera 6021 , and the projection screen 602 further includes a sound generating unit 6022 .

The processor 6011 includes one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 6011 can use at least one hardware form among DSP (Digital Signal Processing, digital signal processing), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array, programmable logic array) accomplish. The processor 6011 may also include a main processor and a coprocessor. The main processor is a processor used to process data in the wake-up state, also called CPU (Central Processing Unit, central processing unit); A low-power processor for processing data in a standby state. In some embodiments, the processor 6011 may be integrated with a GPU (Graphics Processing Unit, image processor), and the GPU is used for rendering and drawing the content that needs to be displayed on the display screen. In some embodiments, the processor 6011 may further include an AI (Artificial Intelligence, artificial intelligence) processor, where the AI processor is used to process computing operations related to machine learning.

Memory 6012 may include one or more computer-readable storage media, which may be non-transitory. Memory 6012 may also include high-speed random access memory, as well as non-volatile memory, such as one or more disk storage devices, flash storage devices. In some embodiments, a non-transitory computer-readable storage medium in the memory 6012 is used to store at least one instruction, and the at least one instruction is used to be executed by the processor 6012 to implement the audio playback provided by the method embodiments in this application. method.

The camera 6021 is used to capture images or videos. Optionally, the camera 6021 is arranged in front of the projection screen 602 . In some embodiments, the camera includes any one of a main camera, a depth-of-field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth-of-field camera to achieve a background blur function, the fusion of the main camera and the wide-angle camera to achieve panoramic shooting, and VR (Virtual Reality, virtual reality) shooting function or other integrated shooting functions. In some embodiments, the camera assembly 6021 may also include a flash. The flash can be a single color temperature flash or a dual color temperature flash. Dual color temperature flash refers to the combination of warm light flash and cold light flash, which can be used for light compensation under different color temperatures.

Optionally, the laser projection host 601 may also have other devices such as speakers built in, or the laser projection host 601 may also be connected to other peripheral devices, such as a subwoofer and the like.

Those skilled in the art can understand that the structure shown in FIG. 6 does not constitute a limitation on the laser projection device 600, and may include more or less components than the one shown, or combine some components, or adopt different component arrangements .

In some embodiments, a computer-readable storage medium is also provided, and a computer program is stored in the storage medium, and when the computer program is executed by a processor, the steps of the audio playback method in the above-mentioned embodiments are implemented. For example, the computer-readable storage medium may be ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.

It should be noted that the computer-readable storage medium mentioned in the embodiments of the present application may be a non-volatile storage medium, in other words, may be a non-transitory storage medium.

It should be understood that, all or part of the steps of implementing the above embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The computer instructions may be stored in the computer-readable storage medium described above.

That is, in some embodiments, there is also provided a computer program product containing instructions, which, when executed on a computer, cause the computer to perform the steps of the audio playback method described above.

It should be understood that references herein to "at least one" refers to one or more, and "plurality" refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, "/" means or means, for example, A/B can mean A or B; "and/or" in this document is only an association that describes an associated object Relation, it means that there can be three kinds of relations, for example, A and/or B can mean that A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same function and effect. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like are not necessarily different.

It should be noted that the information (including but not limited to user equipment information, user personal information, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the embodiments of this application, and Signals are authorized by users or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions. For example, the video images captured by the camera involved in the embodiments of the present application and the acquired audio signals to be played are all acquired with sufficient authorization.

The above-mentioned examples provided for this application are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application. Inside.

Claims (10)

1. An audio playback method, characterized in that, applied to a laser projection device, the laser projection device comprising a projection host and a projection screen, the projection screen having a camera, the projection screen being a sound-emitting screen, the method comprising: acquiring an audio signal to be played, the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, the first frequency band is higher than the second frequency band; Detecting whether the camera is in a shooting state; When the camera is in a shooting state, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played. 2. The method of claim 1, wherein the playing the audio signal of the first frequency band without playing the audio signal of the second frequency band through the projection screen comprises: detecting whether there is a valid signal in the audio signal of the second frequency band; If there is no valid signal in the audio signal of the second frequency band, the audio signal of the second frequency band is deleted, and the audio signal of the first frequency band is played through the projection screen. 3. The method of claim 2, wherein the audio signal to be played is an audio signal generated in a video picture captured by the camera; The detecting whether there is a valid signal in the audio signal of the second frequency band includes: Identifying the video picture captured by the camera to determine whether there is a target action in the video picture; In the case that the target action does not exist in the video picture, it is determined that there is no valid signal in the audio signal of the second frequency band. 4. The method of claim 2, wherein the audio signal to be played is an audio signal generated by playing a musical instrument; The detecting whether there is a valid signal in the audio signal of the second frequency band includes: extracting frequency information of the audio signal of the second frequency band; If there is no musical instrument frequency information matching the frequency information of the audio signal of the second frequency band in the stored musical instrument frequency information, it is determined that there is no valid signal in the audio signal of the second frequency band. 5. The method of claim 1, wherein the playing the audio signal of the first frequency band without playing the audio signal of the second frequency band through the projection screen comprises: In the case that the projection host has a sound box, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the sound box; or When the projection host is connected with a subwoofer, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer. 6. A laser projection device, characterized in that the laser projection device comprises a projection host and a projection screen, the projection screen has a camera, the projection screen is a sound-emitting screen, the projection host comprises a processor, the processing The device is used for: acquiring an audio signal to be played, the audio signal includes an audio signal of a first frequency band and an audio signal of a second frequency band, the first frequency band is higher than the second frequency band; Detecting whether the camera is in a shooting state; When the camera is in a shooting state, the audio signal of the first frequency band is played through the projection screen, but the audio signal of the second frequency band is not played. 7. The laser projection apparatus of claim 6, wherein the processor is configured to: detecting whether there is a valid signal in the audio signal of the second frequency band; If there is no valid signal in the audio signal of the second frequency band, the audio signal of the second frequency band is deleted, and the audio signal of the first frequency band is played through the projection screen. 8. The laser projection apparatus of claim 7, wherein the processor is configured to: Identifying the video picture captured by the camera to determine whether there is a target action in the video picture; In the case that the target action does not exist in the video picture, it is determined that there is no valid signal in the audio signal of the second frequency band. 9. The laser projection apparatus of claim 7, wherein the processor is configured to: extracting frequency information of the audio signal of the second frequency band; If there is no musical instrument frequency information matching the frequency information of the audio signal of the second frequency band in the stored musical instrument frequency information, it is determined that there is no valid signal in the audio signal of the second frequency band. 10. The method of claim 6, wherein the processor is used to; In the case that the projection host has a sound box, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the sound box; or When the projection host is connected with a subwoofer, the audio signal of the first frequency band is played through the projection screen, and the audio signal of the second frequency band is played through the subwoofer.

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