Sound system and control method thereof

Abstract

According to the sound system control method provided by the invention, the environmental acoustic characteristic parameters and the positions of the plurality of sound devices are detected, whether the recommended placement positions generated according to the environmental acoustic characteristic parameters are met is judged, and if not, the position adjustment information is output; a user can adjust the position of the sound equipment according to the position adjustment information so as to obtain a better sound effect, and the user can enjoy high-quality audio experience without professional acoustic knowledge; if the user does not perform position adjustment or the position adjustment does not meet the requirement, the sound system generates a second audio processing algorithm according to the real-time position of the sound equipment, so that the audio experience is ensured as far as possible. By adopting the method, the user obtains a large option, the product use experience is improved, and if the sound effect is poor in the subsequent product use process, the user can autonomously call out the position adjustment information and adjust the position of the sound equipment according to the position adjustment information.

Description

Technical Field

[0001] The present application belongs to the technical field of home theaters, and in particular, relates to a sound system and a control method thereof. Background Art

[0002] When a user uses a speaker to play music or other audio in a confined space, the sound wave signal output by the speaker may be superimposed or offset by the speaker characteristics, space reflection, etc., which may cause the audio signal to be distorted, thereby affecting the sound quality of the audio signal and the user's auditory experience. In order to ensure the effect of the speaker playing the audio signal, the audio signal needs to be balanced to improve the user's hearing at various positions in the space. On the one hand, in the prior art, the equalization of audio signals usually adopts an inherent algorithm, and the placement of the speakers is not considered, resulting in poor audio equalization effect; on the other hand, since different usage environments have the best placement positions to match them, the existing paper instructions are usually recommended for the theoretical use space. The approximate placement position guide cannot be flexibly changed according to the changes in the user's home environment, so it is impossible to show the best sound effect in a specific use space. In addition, the prior art also lacks a solution for dynamically adjusting the audio processing algorithm according to the real-time position of the speaker. Summary of the invention

[0003] The purpose of the present application is to overcome at least one of the shortcomings of the above-mentioned prior art and to provide a sound system and a control method thereof. Compared with the prior art, the audio processing algorithm can be dynamically adjusted according to the real-time position of the sound system, and the user's right to choose is fully respected, so that the user can choose part or all of the control method according to their needs, thereby improving the product user experience.

[0004] In order to solve the above technical problems, on the one hand, the present application provides a sound system control method, wherein the sound system includes multiple sound devices connected by audio transmission, and the control method includes: obtaining device characteristic parameters of the multiple sound devices; detecting acoustic characteristic parameters of the environment in which the multiple sound devices are located, and generating recommended placement positions based on the acoustic characteristic parameters and the device characteristic parameters; detecting the positions of the multiple sound devices in the environment in which they are located; judging whether the positions of the multiple sound devices meet the recommended placement positions; if so, generating a first audio processing algorithm based on the device characteristic parameters and the acoustic characteristic parameters of the environment in which they are located, and processing the audio signal input to the sound system according to the first audio processing algorithm; if not, outputting position adjustment information for adjusting the positions of the multiple sound devices; detecting the positions of the multiple sound devices again, and generating a second audio processing algorithm based on the positions of the multiple sound devices detected again, the device characteristic parameters and the acoustic characteristic parameters of the environment in which they are located, and processing the audio signal input to the sound system according to the second audio processing algorithm.

[0005] On the other hand, the present application also provides an audio system, including multiple audio devices connected by audio transmission, a position detection module, a judgment module, a user interaction module, and an audio processing module; the position detection module is arranged in one or more of the multiple audio devices, and is configured to detect the positions of the multiple audio devices; the judgment module is configured to determine whether the positions of the detected multiple audio devices meet the recommended placement positions; the user interaction module is configured to interact with the user about the position information of the audio device; the audio processing module processes the audio signal according to the generated audio processing algorithm.

[0006] The audio system control method provided by the present application detects the environmental acoustic characteristic parameters and the positions of multiple audio devices, and determines whether the recommended placement positions generated according to the environmental acoustic characteristic parameters are met. If not, the position adjustment information is output. The user can adjust the position of the audio device according to the position adjustment information to obtain better sound effects. The user does not need to have professional acoustic knowledge to enjoy a high-quality audio experience. If the user does not adjust the position or the position adjustment does not meet the requirements, the audio system generates a second audio processing algorithm based on the real-time position of the audio device to ensure the audio experience as much as possible. With this method, users have greater freedom of choice and improve the product experience. If the sound effect is not good during the subsequent use of the product, the user can also independently call out the position adjustment information and adjust the position of the audio device according to the position adjustment information.

[0007] On the other hand, the audio system provided by the present application includes multiple audio devices connected by audio transmission, a position detection module, a judgment module, a user interaction module, an audio processing module, and an audio signal transmission module; it can detect the environmental acoustic characteristic parameters and the positions of multiple audio devices, and judge whether the recommended placement positions are met. If not, position adjustment information can be output, allowing users to choose to adjust the position of the audio device according to prompts to obtain better sound effects, or choose to skip if the sound effects are not required. Users have greater freedom of choice, which improves the product usage experience. If the sound effects are not good during subsequent product use, users can also call up the position adjustment information and adjust the position of the audio device according to the position adjustment information. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 is a flow chart of a sound system control method in one embodiment of the present application; Figure 2 is a flow chart of a sound system control method in another embodiment of the present application; Figure 3 is a flow chart of a sound system control method in another embodiment of the present application; Figure 4 is a flow chart of a sound system control method in another embodiment of the present application; Figure 5 This application Figure 4 Schematic diagram of the audio equipment characteristic parameter-environmental acoustic characteristic parameter-placement position data model library in the embodiment; Figure 6 is a system block diagram of a sound system in one embodiment of the present application; Figure 7 It is a system block diagram of a sound system in another embodiment of the present application. DETAILED DESCRIPTION

[0010] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0011] The terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0012] The "embodiment" mentioned in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It can be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0013] It should be understood that in this application, "at least one (item)" means one or more, "multiple" means two or more, "at least two (items)" means two or three and more, and "and / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0014] Please refer to Figure 1 , which is a flow chart of a sound system control method in an embodiment of the present application. The sound system control method comprises the following steps: S101: Obtain the audio equipment characteristic parameters of the multiple audio devices. It should be noted that when the audio system is connected to an electronic device installed with an application end APP that matches the audio system, the equipment characteristic parameters of multiple audio devices can be obtained in real time. In other words, the audio equipment characteristic parameters correspond to the product name one by one, and will be updated and uploaded in real time in the background system of the APP. The equipment characteristic parameters of the audio equipment include but are not limited to one or more of the speaker type, speaker size / number / installation distance angle, power, frequency response, sound beam width, etc.

[0015] S102: Detecting acoustic characteristic parameters of the environments in which the plurality of audio devices are located, and generating recommended placement positions according to the acoustic characteristic parameters and device characteristic parameters of the audio devices.

[0016] When the sound system is used in an indoor space, the acoustic characteristic parameters of the environment generally refer to the unique acoustic characteristic parameters brought about by physical characteristic parameters such as the room size and shape, the materials used for the room wall / floor / ceiling decoration, and the furniture placement.

[0017] In the embodiment of the present application, the physical characteristic parameters of the environment can be obtained by an application-side APP installed in an electronic device with a microphone module in cooperation with the sound system, or the physical characteristic parameters of the environment can be obtained by an application-side APP installed in an electronic device with a camera module in cooperation with the sound system, or the physical characteristic parameters such as the size and shape of the room, the materials used for the decoration of the room wall / floor / ceiling, and the placement of furniture can be obtained by an application-side APP installed in an electronic device with a camera module and a microphone module in cooperation with the sound system, and a three-dimensional model of the environment can be generated. In other words, the embodiment of the present application can obtain more accurate physical characteristic parameters of the room by emitting sound waves or by computer vision, or by combining the two. After the physical characteristic parameters of the environment (room) are detected, they are input into acoustic simulation software, such as EASE (Enhanced Acoustic Simulator for Engineers), Odeon, CATT-Acoustic, Room EQ Wizard, SoundPLAN, etc. to calculate and obtain acoustic characteristic parameters. In a specific implementation method, the APP front end supporting the sound system receives the measured physical characteristic parameters of the room, and then sends these parameters to the associated acoustic simulation software through the back-end system for simulation calculation to obtain the acoustic characteristic parameters of the room. It should be noted that after the physical characteristic parameters of the room are detected, they can be directly input into the acoustic simulation software to obtain more accurate room acoustic characteristic parameters, or the processor of the electronic device can perform acoustic processing to obtain more basic room acoustic characteristic parameters.

[0018] In a preferred embodiment, the physical characteristic parameters of the room are rechecked each time the system is turned on. Furniture replacement or position change in the room may cause changes in the physical characteristic parameters of the room, or changing the use environment of the sound system may also cause changes in the physical characteristic parameters of the environment. Rechecking the physical characteristic parameters of the room each time the system is turned on can provide more accurate calculation parameter input (i.e., room acoustic characteristic parameters), thereby obtaining a more accurate recommended placement position.

[0019] The following uses our 7.1-channel surround sound system model 2620 as an example to explain how to generate recommended placement positions based on the device characteristic parameters of the audio equipment and the acoustic characteristic parameters of the environment. 7.1 channels means that the audio system consists of 7 full-range speakers and 1 low-frequency speaker. Our U2620 audio system consists of a soundbar 21 with 3 full-range speakers, a front left surround 22 with 1 full-range speaker, a front right surround 23 with 1 full-range speaker, a rear left surround 25 with 1 full-range speaker, a rear right surround 26 with 1 full-range speaker, and a 6.5-inch subwoofer 24 with 1 low-frequency speaker.

[0020] In one embodiment, it is detected that the shape of the room where the sound system is placed is a square. Generally speaking, the equal length of each side of a square room causes the repetition of the sound wave reflection path, and the wavelength λ of a specific frequency is easy to match the room size, thereby generating standing waves, causing the sound of certain frequencies f to be amplified or weakened, generating roars, missing low frequencies or turbid sounds, and other problems, affecting the sound quality of the sound system. For example, the side length of the room is 5m, and the calculation formula for the wavelength (λ) of the sound wave is λ=c / f, c is the propagation speed of the sound wave in the air, which is about 343 m / s, and the frequency f=c / λ=343÷5=68.6Hz, that is, the wavelength corresponding to the 68.6Hz frequency sound wave is exactly equal to the room size, resulting in the formation of standing waves in the room for the 68.6Hz frequency sound, that is, the bass of 68.6Hz may be greatly enhanced at some points, causing the bass of this frequency band to become turbid or even completely disappear without low frequency. Therefore, for this situation, combined with the characteristic parameters of the audio equipment, the area with severe standing waves in the square room is obtained by calculation, so as to avoid placing the audio equipment in this area. Specifically, a 6.5-inch subwoofer is used as an example. The bass of a 6.5-inch subwoofer can generally dive to 50-70Hz. For a square room with a side length of 5m, the detection frequency of 68.6Hz bass is easy to form standing waves in the area (usually the corner or center of the room), and the above area is avoided when recommending the placement position. In addition, since the other 7 full-range speakers also contain bass with a frequency of 68.6HZ, when calculating the recommended placement position, the soundbar host 21, front left surround 22, front right surround 23, rear left surround 25, and rear right surround 26 that contain the other 7 full-range speakers should also avoid the above-mentioned areas that are easy to form standing waves. For the square room in this embodiment, the placement position M1 is first generated according to the possible impact of the room shape and size on the acoustic characteristics (such as avoiding standing waves), and then the correction coefficient K is generated according to the impact of other physical characteristic parameters of the room, such as the size of the room, the placement of furniture, and the decoration materials on the sound effect to correct the placement position M1, and finally the recommended placement position is formed. It should be noted that when calculating the correction coefficient K, the background system can control the corresponding audio equipment to emit sound waves for measurement and calculation, or the electronic device with the APP installed can emit sound waves for measurement and calculation.

[0021] Exemplarily, in the above embodiment, the recommended placement positions are: the soundbar 21 is placed slightly away from the wall than the standard solution to reduce the impact of wall reflection on sound quality; the front left surround 22, front right surround 23, rear left surround 25, and rear right surround 26 are slightly tilted toward the listening position (generally the sofa is located as the listening position, and in other embodiments, an interactive interface can also be provided to allow the user to specify the listening position) to avoid sound interference from parallel walls; the subwoofer 24 is placed at a distance from the nearest wall that is 1 / 3 of the length of the room side to avoid standing waves.

[0022] It should be noted that this embodiment uses a square room with a side length of 5m to illustrate the specific steps of calculating the recommended placement position. Similarly, when the side length of the square room is other values, the method disclosed in this embodiment can also be used to calculate the recommended placement position.

[0023] In another embodiment, by measuring the room area or the length of the longest side, combined with the equipment characteristic parameters of the sound system (speaker type, speaker size / number / installation distance angle, power, frequency response, sound beam width, etc.), it is determined whether it is a small room. For example, for our 2620 7.1-channel surround sound system (whose recommended use area is 20-40㎡), when the room area is less than 20㎡, or the longest side is less than 4.5m, it is determined to be a small room, that is, the sound system does not match the recommended use area. At this time, the placement of the sound equipment can be optimized by the method provided in this application to present the best sound effect when used in a small room. The principle is to minimize direct sound and make reasonable use of room reflections. Specifically, the position of each audio device in the 7.1 surround sound system is determined with reference to the "listening position". Generally speaking, the distance D between the listening position and the display device is related to the size S of the display device. One calculation method is: D≈ S (inches) × 2.5~3 times. For a 65-inch display device (TV), the listening position is approximately 2.5~3.0 meters away from the display device (TV). The soundbar host 21 is placed below the display device, the front left surround 22 and the front right surround 23 are located on the right side of the listening position (90°~110°), and the rear left surround 25 and the rear right surround 26 are located 135°~150° behind the listening position and need to form an angle difference with the front left surround 22 and the front right surround 23. In addition, preferably, in the case of a small room, it is also possible to consider appropriately raising the height of the front left surround 22, the front right surround 23, the rear left surround 25, and the rear right surround 26 to 30~50cm above the listening position. In addition, since the above placement positions only take into account the size of the room, a correction coefficient can be generated based on the impact of the room shape, furniture placement, decoration materials, etc. on the sound effects to correct the above placement positions.

[0024] In addition, it should be noted that the above embodiments are only exemplary descriptions. This application is based on rooms of different shapes, sizes, and various types of decoration materials as test samples. During the test, by placing furniture of different sizes and shapes in the room and adjusting the positions of various audio devices in a controlled manner, the effects of different placement methods on the sound effects are tested to find the device placement position with the best sound effects. Subsequently, these test sample data are systematically analyzed to train a deep neural network model so that the model learns the complex relationship between input parameters and acoustic characteristics. By inputting the equipment characteristic parameters of the audio equipment and the acoustic characteristic parameters of the use environment into the trained deep neural network model, the optimal placement position of a specific audio system in a specific environment can be calculated, providing users with an optimized audio equipment placement plan.

[0025] In addition, the present application can also recommend the best placement of the audio system based on the room acoustic characteristic parameters and optimization search technology through statistical modeling methods. First, data input is received, including but not limited to room geometry parameters (length, width, height), wall material, furniture position, etc.; audio equipment characteristic parameters (speaker type, number of speakers and installation angle / distance, power, frequency response, sound beam width, etc.). In other embodiments, user demand input can also be received, such as listening position, preferred sound effect mode (cinema, music, etc.). Subsequently, the algorithm calculates early reflections based on ray tracing method, obtains key reflection points, and calculates low-frequency standing waves through modal analysis to identify resonant frequency points. On this basis, the preliminary optimal placement of each audio device is calculated with reference to the ITU-R BS.775 standard (surround sound system) and / or Dolby Atmos recommended placement scheme. On the basis of the preliminary calculation, a genetic algorithm is further used to optimize the placement of the audio to reduce the standing wave effect, improve the uniformity of sound coverage, and optimize the sound image positioning. For the placement of the subwoofer, the algorithm calculates the low-frequency resonance mode of the room to avoid placing the subwoofer at the extreme pressure point (such as the corner of the wall, the center of the room). Subsequently, the particle swarm optimization algorithm (PSO) is used to calculate the optimal subwoofer position. Finally, the algorithm outputs the recommended coordinates (X, Y, Z) and recommended placement angles of each audio device in the audio system to provide the optimal audio device placement solution.

[0026] It should be noted that the sound system can also be used in outdoor environments, and fixed and uniform environmental acoustic characteristic parameters are set for outdoor environments. In addition, the recommended placement positions for various situations can be stored in the background server in advance. At this time, if the sound system is detected to be outdoors, the recommended placement position corresponding to the outdoor environment is directly called out, without having to obtain the corresponding recommended placement position through algorithm calculation.

[0027] S103: Detect the position of each audio device in the audio system in the environment. Specifically, the position of each audio device includes but is not limited to data such as coordinates and placement angles in the three-dimensional model of the environment. Specifically, the position and / or angle data of multiple audio devices in a static state can be collected through one or more of ultrasonic waves, infrared signals, Bluetooth, microphone array detection technology, and ultra-wideband technology; the movement trajectory and direction change of multiple audio devices can be collected using inertial measurement technology. Fusion of multiple sensor detections can utilize the complementary advantages of different sensors to improve the accuracy, robustness, and real-time performance of audio position detection.

[0028] In one embodiment, ultra-wideband technology is combined with inertial measurement technology to obtain the location information of each audio device. Ultra-wideband technology positioning requires at least four non-coplanar signal base stations to be arranged in space. First, according to the three-dimensional model of the environment obtained in step S102, the specific locations where the four signal base stations are installed are determined ( x i , y i , z i ) (i=1,2,3,4), the audio device sends a signal to the signal base station or the signal base station sends a signal to the audio device to measure the distance d from the audio device to each base station i , that is, the distance from the audio equipment to the signal base station 1 is d 1、 The distance to signal base station 2 is d 2 、 The distance to signal base station 3 is d 3、 The distance to the signal base station 4 is d4, and the position of the audio equipment is (x, y, z) satisfying the following equations:

[0029] After expansion, we get:

[0030] The corresponding signal base station 1 has:

[0031] For signal base station i (i=2,3,4), we have:

[0032] Subtracting the above two equations, we get the linear equation:

[0033] Rearranging the above equation into matrix form:

[0034] Use linear algebra methods (such as Gaussian elimination or matrix inversion) to solve the above equations and obtain the coordinates (x, y, z) of the audio equipment.

[0035] In addition, when the audio equipment moves, its motion trajectory and direction changes can be monitored in real time through the inertial measurement unit installed in it, and its coordinates can be known in real time through calculation, thereby improving the timeliness and accuracy of the positioning of the audio equipment. S104: Determine whether the position of the audio equipment meets the recommended placement position. It should be noted that the placement position of each audio equipment meets the recommended placement position if it is exactly the same as the placement position recommended in the recommended placement position, or the placement position of each audio equipment is slightly different from the placement position recommended in the recommended placement position and does not affect the sound effect or has a small impact on the sound effect. It is also considered to meet the recommended placement position. In addition, in the case where there are multiple audio equipment in the audio system, each audio equipment has a different weight. The position of the audio equipment with a larger weight may have a smaller deviation from the recommended placement position and may also have a greater impact on the sound effect. The position of the audio equipment with a smaller weight may have a larger deviation from the recommended placement position and may also have a smaller impact on the sound effect.

[0036] S105: If the position of the audio device meets the recommended placement position, a first audio processing algorithm is generated according to the device characteristic parameters of the multiple audio devices and the acoustic characteristic parameters of the environment in which they are located; the first audio processing algorithm generated at this time can well fit the use environment and the audio device itself.

[0037] S106: If the position of the audio device does not meet the recommended placement position, and the placement position (including angle and distance) corresponding to the recommended placement position is greatly different and causes the sound effect to deteriorate to a large extent, the system outputs position adjustment information to prompt the user to adjust the placement position of each audio device.

[0038] It should be noted that a diagram of the environment in which the audio system is located and the recommended placement positions of multiple audio devices can be generated or voice adjustment prompt information can be generated on an application side APP installed on an electronic device with a display module that cooperates with the audio system. Specifically, the APP installed on the mobile phone can prompt the user with a diagram of the recommended placement position. The diagram information includes a three-dimensional model of the room and the recommended placement positions of each audio device. Furthermore, the diagram information can also include the current position of each audio device, and new position information can be generated in time according to the movement of the audio device and updated in the diagram, so that users can instantly understand the position of their audio equipment and the gap between it and the recommended placement position, which is also convenient for users to make adjustments and improves user product experience.

[0039] S107: Detect the position of each audio device again; It should be noted that this step includes the situation that the user adjusts according to the prompt requirements, the user is unwilling to adjust, and the user does not adjust according to the prompt requirements. In order to improve the user's product experience and avoid the user from being unable to enter the system, regardless of whether the user has made adjustments according to the requirements, the preset conditions are met, such as after a preset time period, or after being triggered by the user, the position of each audio device is detected again. Of course, if the user is unwilling to adjust or the user does not adjust according to the prompt requirements, the entire audio system may not be able to reflect a better sound effect, but the user can be exempted from the cumbersome steps of adjusting each audio device. At this time, the user has a large free choice space. If you want to get the best sound effect, you can adjust the position of each audio device according to the prompt requirements. If you don't have high requirements for the sound effect, you can place each audio device according to the manual or place it according to existing knowledge. In addition, if the user has poor sound effect during subsequent use, the user can also call up the position adjustment information and adjust the position of the audio device according to the position adjustment information.

[0040] S108: Generate a second audio processing algorithm based on the positions of the multiple audio devices detected again (no judgment is made at this time and they may or may not meet the recommended placement positions), characteristic parameters of the audio devices and acoustic characteristic parameters of the environments in which they are located.

[0041] S109: Process the audio signal according to the determined first audio processing algorithm or the second audio processing algorithm.

[0042] The audio system control method provided in this embodiment sets the recommended placement positions of each audio device according to the environmental acoustic characteristic parameters, and determines whether the user's placement position meets the recommended placement position. If so, a first audio processing algorithm is generated according to the device characteristic parameters and the acoustic characteristic parameters of the environment in which it is located. If not, position adjustment information is output to prompt the user to adjust the position. At this time, the user has the freedom to choose and can adjust according to the prompt or not. Regardless of whether the user adjusts or not, the position of the audio device will be detected again, and then a second audio processing algorithm will be generated according to the position of the audio device detected again. The audio system control method provided in this embodiment can, on the one hand, obtain the best audio effect in the current environment by guiding the user to place the audio device, and on the other hand, it also provides users with greater freedom of choice, greatly improving the user experience of the product.

[0043] It should be noted that in the present application, generating position adjustment information includes generating a diagram of the environment in which the audio system is located and the positions of multiple audio devices on an application terminal APP that is installed on an electronic device with a display module and cooperates with the audio system. That is to say, the audio system also has an APP application terminal that cooperates with it. The APP application terminal is installed on an electronic device with a display module, such as a mobile phone, tablet computer, etc. The way to generate position adjustment information is to generate a schematic diagram of the environment in which the audio system is located and the positions of each audio device. For example, when the user's audio device placement does not meet the recommended placement position, the corresponding audio device icon on the APP will flash accordingly and indicate where it should be placed. When the user places the corresponding audio device where it should be placed according to the prompt, the corresponding icon will no longer flash.

[0044] In addition, voice prompts can be used to instruct users to place the corresponding audio equipment in the correct position. Of course, it is more intuitive to use diagrams to indicate the placement position, and the user experience is better. In addition, the diagram method can be combined with voice prompts to provide placement instructions to further improve the user experience.

[0045] Please refer to Figure 2 , which is a flow chart of a sound system control method in another embodiment, the sound system control method comprises the following steps: S201: Acquire audio device characteristic parameters of the plurality of audio devices.

[0046] S202: Detect the acoustic characteristic parameters of the environment in which multiple audio devices are located, and generate recommended placement positions based on the acoustic characteristic parameters and the device characteristic parameters of the audio devices. Specifically, detecting the acoustic characteristic parameters of the environment in which multiple audio devices are located includes detecting factors such as room size, furniture placement, and the impact of decorative materials on acoustic characteristics, and simulating and generating a three-dimensional model of the environment. It should be noted that since the acoustic characteristic parameters of the environment are detected each time the device is turned on, changes and replacements in the position of furniture in the room will establish a new three-dimensional model of the environment, thereby ensuring that the audio algorithm can be accurately calculated to provide users with better sound effects.

[0047] S203: Detecting the position of each audio device in the audio system in the environment. Specifically, detecting the position of each audio device includes but is not limited to data such as coordinates and placement angles in the three-dimensional model of the environment in which it is located.

[0048] S204: Determine whether the position of the audio equipment meets the recommended placement position. It should be noted that the placement position of each audio equipment is exactly the same as the placement position recommended in the recommended placement position to meet the recommended placement position, or the placement position of each audio equipment is slightly different from the placement position recommended in the recommended placement position and does not affect the sound effect or has a small impact on the sound effect. The placement method is also considered to meet the recommended placement position.

[0049] S205: If the position of the audio device does not meet the recommended placement position, the placement position (including angle and distance) corresponding to the recommended placement position is greatly different, and the sound effect is greatly deteriorated, then the system outputs position adjustment information to prompt the user to adjust the placement position of each audio device. In this embodiment, after completing S205, it directly jumps to step S203, that is, in this embodiment, it continuously detects and determines whether the position of the audio device meets the recommended placement position until it meets the recommended placement position.

[0050] S206: If the position of the audio device meets the recommended placement position, an audio processing algorithm is generated according to device characteristic parameters of the multiple audio devices and acoustic characteristic parameters of the environment in which they are located.

[0051] S207: Process the audio signal according to the generated audio processing algorithm.

[0052] In this embodiment, as long as the user selects the placement guide, the audio equipment must be placed at the recommended position, which is slightly worse in terms of user experience, but can provide users with better sound effects.

[0053] refer to Figure 3 , which is a flow chart of a sound system control method in another embodiment, and Figure 2 The difference between the illustrated embodiments is the addition of step S306, i.e., the conditions for triggering re-detection of the positions of multiple audio devices include after a preset time period or after being triggered by the user. That is to say, in this embodiment, the background no longer detects the positions of the audio devices in real time, but only detects the positions of the audio devices after a preset time period, such as 30 seconds, after the output of the position adjustment information, or after being triggered by the user, such as outputting the interactive interface "Adjustment Completed" on the APP's graphical user interface. After completing the position adjustment of the audio device, the user touches the "Adjustment Completed" interface, and the background detects the positions of the audio devices again after receiving the information. Relative to Figure 2 The embodiment can reduce the amount of computation of the background system, because the position of the audio device cannot be fed back in real time, and the user experience is poor. Figure 2 Poor implementation.

[0054] Please refer to Figure 4 , which is a flow chart of a sound system control method in one embodiment of the present application, the method comprising: S401: Acquire audio device characteristic parameters of the plurality of audio devices.

[0055] S402: Detecting acoustic characteristic parameters of the environment in which the plurality of audio devices are located.

[0056] S403: Compare the audio equipment characteristic parameters and the acoustic characteristic parameters of the environment in which it is located with the pre-established audio equipment characteristic parameter-acoustic characteristic parameter-placement position model library, traverse each model in the data model library, and if the difference scores between the equipment characteristic parameters of the current audio system and the acoustic characteristic parameters of the environment in which it is located and the audio equipment characteristic parameters and the environmental acoustic characteristic parameters in the model library are respectively less than or equal to the preset scores, jump to step S404; if at least one of the difference scores between the equipment characteristic parameters of the current audio system and the acoustic characteristic parameters of the environment in which it is located and the audio equipment characteristic parameters and the environmental acoustic characteristic parameters in the data model library is greater than the preset scores, jump to step S405.

[0057] S404: Taking the placement position corresponding to the current audio equipment characteristic parameters and environmental acoustic characteristic parameters in the data model library as the recommended placement position.

[0058] S405: Calculate a recommended placement position based on the current audio equipment characteristic parameters and environmental acoustic characteristic parameters, and generate a new placement position model.

[0059] S406: Storing the new placement position model in the audio equipment characteristic parameter-acoustic characteristic parameter-placement position data model library.

[0060] The audio system control method provided in this embodiment can, on the one hand, quickly obtain the recommended placement position based on the current audio device characteristic parameters and the environmental acoustic characteristic parameters; on the other hand, it also has an autonomous learning function. When the corresponding recommended placement position cannot be found in the database according to the current audio device characteristic parameters and the environmental acoustic characteristic parameters, a new recommended placement position is generated according to the current audio device characteristic parameters and the environmental acoustic characteristic parameters, and the new audio device characteristic parameters-environmental acoustic characteristic parameters-placement position is added to the data model library, so that the number of models in the audio device characteristic parameters-environmental acoustic characteristic parameters-placement position data model library can be continuously enriched during use, so that the system can be continuously optimized.

[0061] Please refer to Figure 5 , where Figure 4The schematic diagram of the audio equipment characteristic parameter-environmental acoustic characteristic parameter-placement position data model library in the embodiment, wherein the audio equipment characteristic parameters are divided into categories such as equipment S1, S2, S3, .....Sn in the table column header, and the environmental acoustic characteristics are divided into model categories such as environmental models E1, E2, E3, .....En in the table row header, and the table contents are the corresponding placement models. For example, when the audio equipment characteristic parameters meet the equipment S2 and the environmental acoustic characteristic parameter model is the environmental model E3, the recommended placement position is the placement model L23. At this time, the APP background can call out the corresponding placement model L23 and display it on the mobile phone as the recommended placement position. Among them, the audio equipment characteristic parameters S1, S2, S3, .....Sn can correspond to the product models of the audio equipment, such as 2500, 2520, 2600, 2620, 3720, 3800, etc., and the environmental models can be distinguished according to the area or according to the usage scenario (such as indoor or outdoor).

[0062] Please refer to Figure 6 , which is a structural block diagram of an audio system in an embodiment of the present application, wherein the audio system 100 includes a functional module 10 and a plurality of audio devices 20 connected by audio transmission; wherein the functional module 10 includes a position detection module 11, a judgment module 12, a user interaction module 13, and an audio processing module 14, wherein the position detection module 11, the judgment module 12, the user interaction module 13, and the audio processing module 14 are directly or indirectly connected by audio signal transmission; the position detection module 11 is configured to detect the positions of the plurality of audio devices 20; the judgment module 12 is configured to determine whether the positions of the plurality of audio devices 20 detected meet the recommended placement positions; the user interaction module 13 is configured to generate position adjustment information when the positions of the plurality of audio devices 20 detected do not meet the recommended placement positions; the audio processing module 14 generates an audio processing algorithm based on the positions of the plurality of audio devices 20 detected, and processes the audio signal according to the audio processing algorithm. wherein the recommended placement position is set according to the acoustic characteristics of the environment in which the audio device 20 is located, such as the reverberation time, the room size, etc., or the standard speaker placement specifications, such as the standard placement angle and distance of the surround sound system.

[0063] It should be noted that after the user interaction module 13 generates the position adjustment information, it notifies the position detection module 11 to detect the positions of the multiple audio devices 20 again after a preset time interval, or after the user interaction module 13 generates the position adjustment information, the position detection module 11 automatically detects the positions of the multiple audio devices 20 again after a preset time interval. The preset time interval is the time required by the user to adjust the positions of the multiple audio devices 20, which can be obtained through multiple measurements. Or the user interaction module 13 notifies the position detection module 11 to detect the positions of the multiple audio devices 20 again after receiving the trigger signal, or the position detection module 11 notifies the position detection module 11 to detect the positions of the multiple audio devices 20 again after receiving the trigger signal; the trigger signal can be sent by the user to the user interaction module 13 or to the position detection module 11 through the APP or remote control, for example, after the user completes the position adjustment or does not want to adjust the position, the user sends a trigger signal to the user interaction module 13 or the position detection module 11 through the APP or remote control, thereby triggering the position detection module 11 to detect the positions of the multiple audio devices 20 again.

[0064] In addition, the audio processing module 14 generates an audio processing algorithm based on the detected positions of the multiple audio devices 20 , which means generating an audio processing algorithm based on the most recently detected positions of the multiple audio devices 20 , especially for the case of multiple detections.

[0065] In the embodiment of the present application, the physical placement data of the audio equipment can be obtained through sensors (such as ultrasonic sensors, laser ranging devices, wireless communication devices, etc.) or through a connected APP, thereby obtaining the position of each audio device. In addition, the position adjustment information can provide graphical guidance through the APP or notify the user through voice prompts how to rearrange the audio. The module can communicate with the APP on the user's device (such as a smartphone or tablet) to intuitively display the room layout and the location of the audio equipment.

[0066] In a specific embodiment, the position detection module 11 includes an ultra-wideband signal unit and an inertial measurement unit. The ultra-wideband signal unit is used to detect the position of multiple audio devices in a static state through ultra-wideband, and the inertial measurement unit is used to detect the movement trajectory and direction change of multiple audio devices through gravity sensing, gyroscopes, etc. Specifically, the ultra-wideband signal unit includes at least 4 signal base stations, and the 4 signal base stations are non-coplanarly arranged in the space where the audio system is located. For example, the 4 signal base stations can be respectively arranged on the 4 walls of the room. In addition, each audio device in this embodiment is equipped with a tag that cooperates with the signal base station. The signal base station sends a signal to the audio device, measures the distance between the audio device and the 4 signal base stations, and thus calculates the three-dimensional position coordinates of the audio device.

[0067] refer to Figure 7In this embodiment, the audio device 20 includes a soundbar main unit 21, a front left surround 22, a front right surround 23, a subwoofer 24, a rear left surround 25, and a rear right surround 26. Generally speaking, the soundbar main unit 21 is placed in front of the user, the front left surround 22 is placed in front of the left of the user, the front right surround 23 is placed in front of the right of the user, the rear left surround 25 is placed behind the user, the rear right surround 26 is placed behind the user, and the subwoofer 24 is placed within the wireless connection distance of the soundbar main unit 21. This placement method is only a rough orientation, and it is also the way that many product manuals on the market instruct users to place. It does not take into account the acoustic characteristics of the environment in which the audio device 20 is located and the acoustic performance of the audio device 20 itself, and thus cannot adjust the sound effect of a specific audio device in a specific environment to the best. Of course, in other embodiments, the audio device 20 may also include some other audios, or reduce some audios on the basis of this embodiment.

[0068] Furthermore, the sound system 100 also includes an environmental noise detection module, which is configured to adjust the audio processing algorithm according to the detected environmental noise signal, so as to fully consider the environmental noise to obtain the best sound effect.

[0069] Furthermore, the sound system 100 further includes a display module, which is connected to the user interaction module and configured to graphically display the position adjustment information generated by the user interaction module, thereby providing the user with a more intuitive position adjustment solution and greatly improving the user experience.

[0070] Furthermore, the display module also includes a user input submodule, and the user input submodule is configured to receive user input of the acoustic characteristic parameters of the environment in which the audio system is located and / or user preference parameters. In other words, the user's environmental acoustic characteristic parameters can be input by the user. In addition, the user can also input the user preference parameters according to his or her own preferences on the basis of the system adjusting the audio processing algorithm, and can adjust the EQ (sound equalizer) to make the sound effect more personalized and auditory enjoyable.

[0071] refer to Figure 7 In a specific implementation, the audio system further includes an application terminal 30 installed on the electronic device, the application terminal 30 includes the display module, and is wirelessly connected to the audio device 20.

[0072] In addition, it should be noted that the functional module in the embodiment of the present application can be integrated into the audio device or integrated into the application terminal 30.

[0073] The workflow of the audio system in the embodiment of the present application is that the audio system obtains the position of the audio device through the position detection module. The judgment module determines whether the position meets the recommended placement position. If not, an adjustment suggestion is generated. After the user adjusts the audio position according to the APP or voice prompt, the system detects the position again and generates a corresponding audio processing algorithm. Finally, the audio signal is optimized by the audio processing module and transmitted to the audio device to provide better sound quality. The audio system combines intelligent position detection, automated audio processing algorithm generation and a user-friendly interface, and can adjust the sound effects according to the position of the audio device in the room, thereby providing users with the best audio experience.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A sound system control method, characterized in that: The audio system includes a plurality of audio devices connected by audio transmission, and the control method includes: Get device characteristic parameters of multiple audio devices; Detecting acoustic characteristic parameters of the environment in which the multiple audio devices are located, and generating recommended placement positions according to the acoustic characteristic parameters and the device characteristic parameters; Detecting positions of the plurality of audio devices in the environment; Determining whether the positions of the plurality of audio devices meet the recommended placement positions; If yes, generating a first audio processing algorithm according to the characteristic parameters of the device and the acoustic characteristic parameters of the environment in which the device is located, and processing the audio signal input to the sound system according to the first audio processing algorithm; If not, outputting position adjustment information for adjusting the positions of the plurality of audio devices; The positions of the multiple audio devices are detected again, and a second audio processing algorithm is generated according to the positions of the multiple audio devices detected again, the characteristic parameters of the devices and the acoustic characteristic parameters of the environments in which they are located, and the audio signals input to the audio system are processed according to the second audio processing algorithm.

2. The sound system control method according to claim 1, characterized in that: The step of re-detecting the positions of the multiple audio devices also includes re-determining whether the positions of the multiple audio devices detected again meet the recommended placement positions. If not, outputting position adjustment information again until the positions of the multiple audio devices meet the recommended placement positions.

3. The sound system control method according to claim 1 or 2, characterized in that: The condition for triggering the re-detection of the positions of the multiple audio devices includes a preset time period or a user trigger.

4. The sound system control method according to claim 1, characterized in that: The environmental acoustic characteristic parameters are obtained through an application terminal installed in an electronic device with a microphone module that cooperates with the audio system and / or the acoustic characteristic parameters of the environment in which the multiple audio devices are located are obtained through an application terminal installed in an electronic device with a camera module that cooperates with the audio system.

5. The sound system control method according to claim 1, wherein: The step of outputting position adjustment information includes generating a diagram of the environment in which the audio system is located and the recommended placement positions of the multiple audio devices and / or generating voice adjustment prompt information on an application terminal installed on an electronic device with a display module that cooperates with the audio system.

6. The sound system control method according to claim 1, characterized in that: The step of detecting the positions of the multiple audio devices includes detecting the positions of the multiple audio devices when the computer is powered on, or detecting the positions of the multiple audio devices at regular intervals, or detecting the positions of the multiple audio devices upon triggering.

7. The sound system control method according to claim 1, characterized in that: The method also includes statistically analyzing the relationship between the historical positions of the multiple audio devices, audio processing algorithms, and audio effects, generating analysis results, and optimizing the first audio processing algorithm or the second audio processing algorithm based on the analysis results.

8. The sound system control method according to claim 1, wherein: The step of "detecting the positions of the multiple audio devices" and / or the step of "detecting the positions of the multiple audio devices again" includes using one or more of ultrasound, infrared signals, Bluetooth, microphone array detection technology, and ultra-wideband technology to collect the position and / or angle data of the multiple audio devices in a static state; and using inertial measurement technology to collect the movement trajectory and direction change of the multiple audio devices.

9. The sound system control method according to claim 1, wherein: The step of "detecting the acoustic characteristic parameters of the environment in which the multiple audio devices are located, and generating recommended placement positions based on the acoustic characteristic parameters and the device characteristic parameters" includes detecting the acoustic characteristic parameters of the environment in which the multiple audio devices are located, and comparing the acoustic characteristic parameters with a preset acoustic characteristic parameter-device characteristic parameter-placement position model library, traversing each model in the model library, and when the difference scores between the device characteristic parameters of the audio system and the acoustic characteristic parameters of the environment in which the audio system is located and the audio device characteristic parameters and the environmental acoustic characteristic parameters in the model library are respectively less than preset values, the placement position in the current model is used as the recommended placement position.

10. The sound system control method according to claim 9, characterized in that: When the difference score between the acoustic characteristic parameters of the environment in which the audio system is located and the acoustic characteristic parameters in the model library and / or the difference score between the device characteristic parameters of the audio system and the device characteristic parameters in the model library is greater than a preset value, a new placement model is generated based on the acoustic characteristic parameters and device characteristic parameters of the environment in which the audio system is located.

11. A sound system, characterized in that: The method comprises a plurality of audio transmission connected audio devices, a position detection module, a judgment module, a user interaction module, and an audio processing module; the position detection module is arranged in one or more of the plurality of audio devices and configured to detect the positions of the plurality of audio devices; the judgment module is configured to judge whether the positions of the plurality of audio devices detected meet the recommended placement positions; The user interaction module is configured to interact with the user about the location information of the audio device; The audio processing module processes the audio signal according to the generated audio processing algorithm.

12. The sound system according to claim 11, characterized in that The position detection module includes an ultra-wideband signal unit and an inertial measurement unit. The ultra-wideband signal unit is used to detect the positions of the multiple audio devices when they are in a static state, and the inertial measurement unit is used to detect the movement tracks and direction changes of the multiple audio devices.

13. The sound system according to claim 12, characterized in that The position detection module includes at least four signal base stations that are not coplanarly arranged, and is used to detect the distances between the multiple audio devices and the four signal base stations, and obtain the three-dimensional position coordinates of the multiple audio devices by calculation.

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