Volume adjustment method and device, and storage medium

Abstract

The application provides a volume adjustment method, device and storage medium. In the technical solution of the application, a terminal device establishes a Bluetooth connection with an audio playing device in advance, and then obtains a current volume adjustment value of the audio playing device; when the terminal device supports absolute volume, a volume adjustment value of the terminal device is obtained, the volume adjustment value of the terminal device being a volume adjustment value of the terminal device obtained after the current volume adjustment value of the audio playing device is synchronized to the terminal device; when the volume adjustment value of the terminal device corresponds to a playing volume of the audio playing device exceeding a hearing protection threshold, the audio playing device is prompted that the playing volume after volume adjustment is too large. In the volume adjustment method of the application, when the terminal device judges that the playing volume of the audio playing device exceeds the hearing protection threshold, the terminal device prompts the user that the playing volume is too large, which can reduce hearing damage caused by the sudden increase of the volume of the audio playing device without the user knowing, and improve the user experience.

Description

Technical Field

[0001] This application relates to the field of audio signal processing technology, and in particular to volume adjustment methods, devices and storage media. Background Technology

[0002] Bluetooth is a wireless communication technology that enables short-range communication between devices and has been widely used in the field of wireless communication. In practical use, two Bluetooth-enabled devices can establish a wireless communication channel to achieve data transmission. At the same time, by using Bluetooth products, such as Bluetooth headphones and Bluetooth speakers for audio playback, users can avoid the hassle of tangled cables.

[0003] Typically, the volume of a Bluetooth-enabled audio playback device can be controlled by directly adjusting the audio playback device or by adjusting the terminal device connected to it. Taking a Bluetooth headset as the audio playback device and a mobile phone as the terminal device, assuming the Bluetooth headset and phone are successfully connected via Bluetooth, the media volume of the Bluetooth headset can be controlled by directly adjusting the Bluetooth headset and / or adjusting the phone.

[0004] However, in related technologies, users are unaware of the volume level when adjusting the volume of audio playback devices, resulting in excessively loud volumes that could damage their hearing. Summary of the Invention

[0005] This application provides a volume adjustment method, device, and storage medium, which can reduce hearing damage caused by sudden increases in volume of audio playback devices without the user's knowledge and improve the user experience.

[0006] In a first aspect, this application provides a volume adjustment method applied to a terminal device, wherein the terminal device pre-establishes a Bluetooth connection with an audio playback device, and the audio playback device is provided with a volume adjustment control or a volume adjustment touch area. The method includes: obtaining the current volume adjustment value of the audio playback device; when the terminal device supports absolute volume, obtaining the volume adjustment value of the terminal device, wherein the volume adjustment value of the terminal device is obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device; and when the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds a hearing protection threshold, prompting the audio playback device that the playback volume after volume adjustment is too high.

[0007] In this embodiment, when the terminal device determines that the playback volume of the audio playback device exceeds the hearing protection threshold, it prompts the user that the playback volume is too high. This can reduce hearing damage caused by the sudden increase in volume of the audio playback device without the user's knowledge and improve the user experience.

[0008] Secondly, this application provides a volume adjustment method applied to an audio playback device. The audio playback device is pre-connected to a terminal device via Bluetooth. The audio playback device is equipped with a volume adjustment control or a volume adjustment touch area. The method includes: when the terminal device supports absolute volume, synchronizing the current volume adjustment value of the audio playback device to the terminal device, so that when the playback volume corresponding to the current volume adjustment value of the audio playback device exceeds the hearing protection threshold, the terminal device prompts the audio playback device that the playback volume after volume adjustment is too high.

[0009] Thirdly, this application provides a volume adjustment device, the device comprising: an acquisition module, configured to acquire the current volume adjustment value of the audio playback device; the acquisition module is further configured to, when the terminal device supports absolute volume, acquire the volume adjustment value of the terminal device, wherein the volume adjustment value of the terminal device is obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device; and a prompting module, configured to, when the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds a hearing protection threshold, prompt that the playback volume of the audio playback device after volume adjustment is too high.

[0010] Fourthly, this application provides a volume adjustment device, the device comprising: a synchronization module, configured to synchronize the current volume adjustment value of the audio playback device to the terminal device when the terminal device supports absolute volume, so that when the playback volume corresponding to the current volume adjustment value of the audio playback device exceeds the hearing protection threshold, the terminal device prompts that the playback volume after volume adjustment of the audio playback device is too high.

[0011] Fifthly, this application provides a volume adjustment device, including a processor and a memory, wherein the memory is used to store code instructions; and the processor is used to execute the code instructions to implement the method in the first or second aspect described above.

[0012] Optionally, there may be one or more processors and one or more memories.

[0013] Alternatively, the memory can be integrated with the processor, or the memory can be set up separately from the processor.

[0014] In specific implementation, the memory can be a non-transitory memory, such as read-only memory (ROM), which can be integrated with the processor on the same chip or set on different chips. The embodiments of this application do not limit the type of memory or the way the memory and processor are set.

[0015] The volume control device in the fifth aspect above can be a chip, wherein the processor can be implemented in hardware or software. When implemented in hardware, the processor can be a logic circuit, integrated circuit, etc.; when implemented in software, the processor can be a general-purpose processor that reads software code stored in memory. The memory can be integrated into the processor or located outside the processor and exist independently.

[0016] In a sixth aspect, this application provides a computer-readable storage medium storing a computer program (also referred to as code or instructions) that, when run on a computer, causes the computer to perform the methods described in the first or second aspect above.

[0017] In a seventh aspect, this application provides a computer program product comprising: a computer program (also referred to as code or instructions) that, when run, causes a computer to perform the methods described in the first or second aspect above. Attached Figure Description

[0018] Figure 1 A schematic diagram illustrating an application scenario provided by one embodiment of this application;

[0019] Figure 2 A schematic diagram of the system architecture of a terminal device provided in one embodiment of this application;

[0020] Figure 3 A flowchart illustrating a volume adjustment method provided in one embodiment of this application;

[0021] Figure 4 A flowchart of a volume adjustment method provided in another embodiment of this application;

[0022] Figure 5 This is a structural schematic diagram of a volume control device provided in one embodiment of this application;

[0023] Figure 6 A structural schematic diagram of a volume control device provided in another embodiment of this application;

[0024] Figure 7 This is a structural schematic diagram of an apparatus provided in yet another embodiment of this application. Detailed Implementation

[0025] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0026] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, "first instruction" and "second instruction" are used to distinguish different user instructions and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0027] It should be noted that, in this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0028] Furthermore, "at least one" refers to one or more, while "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0029] Bluetooth is a short-range wireless technology. This technology effectively simplifies communication between devices and between devices and the Internet, making data transmission between them more efficient and paving the way for wireless communication. By using Bluetooth products, such as Bluetooth headsets and speakers, users can avoid the hassle of tangled cables.

[0030] Figure 1 This is a schematic diagram illustrating an application scenario provided by one embodiment of this application. For example... Figure 1 As shown, the application scenario 100 may include a terminal device 101 and an audio playback device 102. The media volume of the audio playback device 102 can be controlled by adjusting either the audio playback device 102 or the terminal device 101 after the terminal device 101 and audio playback device 102 have been paired and successfully linked.

[0031] It should be understood that the aforementioned terminal device 101 can also be referred to as the main Bluetooth device, and the aforementioned audio playback device 102 can be one or more, and this application does not impose any restrictions on this.

[0032] Taking Bluetooth headsets and terminal devices such as mobile phones or display devices as an example, the process of establishing a wireless communication channel between the Bluetooth headset and the terminal device can be divided into a discovery and pairing phase and a connection and communication phase. The discovery and pairing phase requires trust authentication between the terminal device and the Bluetooth headset, while the connection and communication phase requires establishing a communication connection and data transmission between the terminal device and the Bluetooth headset. For example, the terminal device transmits audio media data to the Bluetooth headset for playback. The media volume on the Bluetooth headset can be controlled directly by adjusting the Bluetooth headset or by adjusting the terminal device.

[0033] With the development of Bluetooth earphones, the emergence of true wireless stereo (TWS) earphones has made them more convenient for users. TWS earphones incorporate touch-sensitive buttons, allowing for easy control with a simple touch. The advantages of TWS touch controls are numerous, including simple structure, fewer components, lower mold costs, fewer assembly steps, and easier waterproofing. Software functions can also be diversified, including single-click, double-click, triple-click, and long-press menu functions. For example, the volume of TWS earphones can be adjusted via single-click, double-click, triple-click, or long-press touch operations.

[0034] However, in Figure 1 In the scenario shown, the user is unaware of the volume level when adjusting the audio playback device, resulting in an excessively loud volume that could damage the user's hearing.

[0035] For example, the terminal device 101 is a mobile phone and the audio playback device 102 is a TWS earphone. In one possible usage scenario, the mobile phone is connected to the TWS earphone. When the user listens to music through the TWS earphone, the music volume of the earphone can be adjusted by touching the TWS earphone. Since the user is unaware of the volume level when adjusting, the volume may be turned up too high, causing damage to the user's hearing and resulting in a poor user experience.

[0036] In view of this, embodiments of this application provide a volume adjustment method, apparatus, and storage medium. In the technical solution of this application, a terminal device establishes a Bluetooth connection with an audio playback device beforehand, and then obtains the current volume adjustment value of the audio playback device; when the terminal device supports absolute volume, it obtains its own volume adjustment value, which is the volume adjustment value of the terminal device obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device; when the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds the hearing protection threshold, it prompts the user that the playback volume after volume adjustment is too high. In the volume adjustment method of this application, when the terminal device determines that the playback volume of the audio playback device exceeds the hearing protection threshold, it prompts the user that the playback volume is too high, which can reduce hearing damage caused by a sudden increase in volume of the audio playback device without the user's knowledge and improve the user experience.

[0037] The terminal devices and audio playback devices involved in the embodiments of this application are all devices that support Bluetooth functionality. The terminal devices can be mobile phones, tablets, laptops, PDAs, mobile internet devices (MIDs), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, self-driving, remote medical surgery, smart grids, transportation safety, smart cities, smart homes, personal digital assistants (PDAs), etc., and this application embodiment is not limited to these. The audio playback devices involved in this application can be Bluetooth headsets, Bluetooth speakers, or other devices with audio playback capabilities, and this application embodiment is not limited to these.

[0038] For example, Figure 2 This is a schematic diagram of the system architecture of the terminal device provided in an embodiment of this application. Figure 2 As shown, the terminal device includes components such as a processor 210, a memory 220, a transceiver 230, a display unit 240, an input unit 250, a sensor 260, an audio circuit 270, and a power module 280.

[0039] The processor 210 is the control center of the terminal device. It connects various parts of the terminal device via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 220, and by calling data stored in the memory 220, it performs various functions and processes data of the terminal device, thereby providing overall monitoring of the terminal device. Optionally, the processor 210 may include one or more processing units; optionally, the processor 210 may integrate an application processor, which mainly handles operating devices, user interfaces, and applications, etc. Of course, it may also include other processors, which are not listed here.

[0040] The memory 220 can be used to store software programs and modules. The processor 210 executes various functional applications and data processing of the terminal device by running the software programs and modules stored in the memory 220. The memory 220 mainly includes a program storage area and a data storage area. The program storage area can store the operating device and application programs required for at least one function (such as sound playback function, image playback function, etc.); the data storage area can store data created according to the use of the terminal device (such as audio data, phone book, etc.). In addition, the memory 220 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0041] Transceiver 230 can provide solutions for wireless communication applications on terminal devices, including wireless local area networks (WLANs) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), and infrared (IR) technologies. Transceiver 230 can be one or more devices integrating at least one communication processing module; for example, it can integrate an antenna with a baseband processor, or it can integrate an antenna with a modem processor, etc., without limitation.

[0042] The display unit 240 can be used to display information input by the user or information provided to the user, as well as various menus of the terminal device. The display unit 240 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or other similar devices, and there is no limitation on this.

[0043] The input unit 250 can be used to receive input numerical or character information, and to generate key signal inputs related to user settings and function control of the terminal device. Specifically, the input unit 250 can collect user operations on or near it and drive corresponding connection devices according to a pre-set program. Furthermore, the input unit 250 may include a touch panel, which can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave touch panels. In addition to the touch panel, the input unit 250 may also include other input devices. Specifically, other input devices may include, but are not limited to, one or more of the following: function keys (such as volume control buttons, power buttons, etc.), trackballs, joysticks, etc.

[0044] The terminal device may also include at least one sensor 260, such as a gyroscope sensor, a motion sensor, and other sensors. The motion sensor may include an accelerometer sensor to detect the magnitude of acceleration in various directions. When stationary, it can detect the magnitude and direction of gravity and can be used for applications that identify the terminal device's posture, such as landscape / portrait switching, related games, and magnetometer posture calibration. Other sensors that may be configured on the terminal device, such as pressure gauges, barometers, hygrometers, thermometers, infrared sensors, and fingerprint sensors, will not be described in detail here.

[0045] The audio circuit 270 may include a speaker and a microphone, providing an audio interface between the user and the terminal device. The audio circuit 270 can convert received audio data into electrical signals and transmit them to the speaker, where the speaker converts them into sound signals for output. On the other hand, the microphone converts collected sound signals into electrical signals, which are received by the audio circuit 270, converted into audio data, and then processed by the processor 210 before being sent to, for example, another terminal device via the video circuit, or the audio data can be output to the memory 220 for further processing.

[0046] The terminal device also includes a power module 280 that supplies power to the various components. Optionally, the power module 280 can be logically connected to the processor 210 through a power management device, thereby enabling the power management device to manage functions such as charging, discharging, and power consumption.

[0047] Although not shown, the terminal device may also include a camera. Optionally, the camera may be positioned in the front or rear of the terminal device, and this application embodiment does not limit this.

[0048] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on the terminal device. In other embodiments of this application, the terminal device may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0049] To make the objectives and technical solutions of this application clearer and more intuitive, the volume adjustment method, apparatus, and storage medium provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0050] Please refer to Figure 3 This is a flowchart illustrating a volume adjustment method provided in one embodiment of this application. This method can be applied to the above... Figure 1 The application scenarios shown can be applied to other scenarios as well, and this application does not limit the scope of the embodiments. For ease of explanation, the method will be applied to, for example, Figure 1 Taking the scenario shown as an example, the terminal device referred to below is... Figure 1 The terminal device 101 shown below, and the audio playback device mentioned below are... Figure 1 The audio playback device 102 shown is described in detail below. Figure 3 The flowchart illustrates the various steps in the method shown, including:

[0051] S301, Obtain the current volume adjustment value of the audio playback device.

[0052] It should be noted that the terminal device establishes a Bluetooth connection with the audio playback device beforehand, and the audio playback device is equipped with volume control or volume adjustment touch area.

[0053] It should be understood that both the terminal device and the audio playback device are Bluetooth-enabled devices, and they are pre-connected via Bluetooth. The audio playback device is equipped with volume adjustment controls or a volume adjustment touch area. For example, the volume adjustment controls can be a touch area to receive user touch operations for adjustment, such as single click, double click, triple click, or long press; or they can be physical buttons to adjust the volume by pressing the buttons. This application does not limit the choice of which method is applicable.

[0054] It should also be understood that volume adjustment values ​​are the values ​​that change the volume, and generally correspond to the size of the playback volume. For example, the volume adjustment value can be set to 1, 2, 3, ..., 16 bars. The larger the number of bars, the louder the corresponding playback volume.

[0055] In this step, the user can adjust the volume of the audio playback device using the volume control or volume adjustment touch area on the audio playback device. Correspondingly, the terminal device obtains the current volume adjustment value of the audio playback device sent from the audio playback device.

[0056] S302, when the terminal device supports absolute volume, obtain the volume adjustment value of the terminal device. The volume adjustment value of the terminal device is obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device.

[0057] It should be understood that, taking Bluetooth headsets and mobile phones as an example, the mobile phone and the headset usually have their own volume. Absolute volume refers to the synchronization of the volume of both the Bluetooth headset and the mobile phone when playing audio. In other words, mobile phones and headsets that support absolute volume can not only adjust their own volume, but also have the other end adjust their volume. When the volume on the mobile phone is turned up to the maximum, the volume on the headset is also at the maximum.

[0058] It should also be understood that when the terminal device supports absolute volume, the user can adjust the volume on the audio playback device side, and the audio playback device can synchronize the current volume adjustment value of the audio playback device to the terminal device, so that the volume adjustment value of the terminal device is consistent with the current volume adjustment value of the audio playback device.

[0059] It should be noted that the volume of the audio playback device can be adjusted directly by adjusting the audio playback device or by adjusting the terminal device; this application does not limit this. This application's embodiments primarily use direct adjustment of the audio playback device as an example for illustration.

[0060] S303, when the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds the hearing protection threshold, a prompt is made that the playback volume of the audio playback device after volume adjustment is too high.

[0061] It should be understood that volume levels exceeding the hearing protection threshold can cause some damage to the hearing of users of audio playback devices. For example, medical research has shown that if the sound intensity entering the ear reaches 85 decibels (dB) and continues for more than 8 hours a day, it can easily lead to hearing loss, and damage to the auditory nerve is incurable.

[0062] It should also be understood that when the terminal device determines that the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds the hearing protection threshold, it will prompt that the playback volume of the audio playback device after volume adjustment is too high. For example, the terminal device may pop up a prompt window on its display screen, prompting that the playback volume of the audio playback device after volume adjustment is too high, and asking the user whether to continue adjusting the current volume adjustment value of the audio playback device. The user can choose to continue adjusting, stop adjusting, or adjust the current volume adjustment value back to the default value, etc. This application does not limit this.

[0063] In this embodiment, when the terminal device determines that the playback volume of the audio playback device exceeds the hearing protection threshold, it prompts the user that the playback volume is too high. This can reduce hearing damage caused by the sudden increase in volume of the audio playback device without the user's knowledge and improve the user experience.

[0064] Based on the above embodiments, Figure 4 A flowchart of a volume adjustment method provided in another embodiment of this application is shown. Figure 4 In the illustrated embodiment, taking the example of a terminal device that does not support absolute volume, the following is a detailed explanation. Figure 4 The flowchart illustrates the various steps in the method shown, including:

[0065] S401, obtain the current playback volume value of the terminal device.

[0066] It should be understood that the current volume playback value of the terminal device is the actual playback volume of the terminal device at present.

[0067] S402, when the terminal device does not support absolute volume, determine whether the playback volume after the audio playback device adjusts exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device.

[0068] It should be understood that when the terminal device does not support absolute volume, the volume adjustment of the audio playback device and the terminal device will not be synchronized. That is to say, when adjusting the volume of the terminal device, only the volume of the terminal device can be adjusted, and the volume of the audio playback device cannot be adjusted synchronously. Similarly, when adjusting the volume of the audio playback device, only the volume of the audio playback device can be adjusted, and the volume of the terminal device cannot be adjusted synchronously.

[0069] For example, taking a mobile phone as the terminal device, a Bluetooth headset as the audio playback device, and volume adjustment values ​​of 1, 2, 3, ..., 16 increments as examples, the following describes the relationship between the volume adjustment values ​​of the terminal device, the volume adjustment values ​​of the audio playback device, and the media volume playback values ​​on the audio playback device when the terminal device supports absolute volume and does not support absolute volume.

[0070] For example, when a Bluetooth headset is connected to a phone that supports absolute volume control, pressing the volume buttons on either the phone or the Bluetooth headset synchronizes the media volume playback value with the Bluetooth headset's pitch meter, allowing users to easily control the media volume. The specific correspondence between the phone's volume adjustment values, the Bluetooth headset's volume adjustment values, and the media playback volume values ​​is shown in Table 1 below.

[0071] Table 1

[0072]

[0073] In the musical scale, the letters A, B, C, ..., P and a, b, c, ..., p represent the span of playback volume between adjacent volume adjustment values. For example, A indicates that the volume span between volume adjustment value 14 and volume adjustment value 15 on the Bluetooth headset is A decibels (dB); "mute" indicates mute; and "X" is the playback volume corresponding to the maximum output power of the Bluetooth headset.

[0074] As can be seen from Table 1 above, when the mobile phone supports absolute volume, the Bluetooth headset volume is adjusted by synchronizing the media playback volume value with the Bluetooth headset's pitch chart.

[0075] When a mobile phone does not support absolute volume, pressing the phone's volume buttons will only adjust the phone's volume, not the Bluetooth headset's volume. Similarly, if a user touches the headset to adjust the volume, only the headset's volume will be adjusted, not the phone's Bluetooth headset volume. The specific correspondence between the phone's volume adjustment values, the Bluetooth headset's volume adjustment values, and the media playback volume values ​​is shown in Table 2 below.

[0076] Table 2

[0077]

[0078] In the musical scale, the letters A, B, C, ..., P and a, b, c, ..., p represent the span of playback volume between adjacent volume adjustment values. For example, A indicates that the volume span between volume adjustment value 14 and volume adjustment value 15 on the Bluetooth headset is A decibels (dB); "mute" indicates mute; and "X" is the playback volume corresponding to the maximum output power of the Bluetooth headset.

[0079] As can be seen from Table 2 above, when the mobile phone does not support absolute volume, the adjustment of the Bluetooth headset volume is synchronized with the media volume playback value by using the Bluetooth headset's pitch table and the terminal device's pitch table. In other words, the playback volume after the audio playback device's volume is adjusted is obtained by combining the current volume adjustment value of the audio playback device and the current volume adjustment value of the terminal device.

[0080] It should also be understood that the terminal device determines whether the combined playback volume after the audio playback device's volume adjustment exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device, which are received from the audio playback device.

[0081] In one possible implementation, when the terminal device does not support absolute volume, if the current volume adjustment value of the audio playback device reaches the first volume adjustment value, it is determined whether the current volume playback value of the terminal device is the maximum volume playback value; if the current volume playback value of the terminal device is the maximum volume playback value, it is determined that the playback volume after the audio playback device volume adjustment exceeds the hearing protection threshold.

[0082] It should be understood that when the current volume adjustment value of the audio playback device is the first volume adjustment value and the current volume adjustment value of the terminal device is the maximum volume adjustment value (or the current volume playback value of the terminal device is the maximum volume playback value), the combined playback volume of the audio playback device after volume adjustment reaches the hearing protection threshold.

[0083] For example, taking volume adjustment values ​​of 1, 2, 3, ..., 16 points as an example, assuming the first volume adjustment value is 12 points and the maximum volume adjustment value of the terminal device is 16 points, when the current volume adjustment value of the audio playback device reaches 12 points, it is determined whether the current volume adjustment value of the terminal device is 16 points. If the current volume adjustment value of the terminal device is 16 points, the terminal device determines that the playback volume after the audio playback device volume adjustment exceeds the hearing protection threshold.

[0084] In another possible implementation, if the current volume playback value of the terminal device is not the maximum volume playback value, when the current volume adjustment value of the audio playback device reaches the second volume adjustment value, it is determined whether the current volume playback value of the terminal device is greater than a preset value. The hearing protection threshold is obtained by combining the terminal device volume playback value corresponding to the preset value and the audio playback device volume playback value corresponding to the second volume adjustment value, where the second volume adjustment value is greater than the first volume adjustment value.

[0085] It should be understood that the second volume adjustment value is greater than the first volume adjustment value, meaning that the playback volume after adjusting according to the second volume adjustment value is greater than the playback volume after adjusting according to the first volume adjustment value.

[0086] Furthermore, if the current volume playback value of the terminal device is greater than the preset value, the playback volume after volume adjustment of the audio playback device is obtained according to the second volume adjustment value of the audio playback device and the current volume playback value of the terminal device, and it is determined whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold.

[0087] For example, assuming the second volume adjustment value is 14 increments, and the volume adjustment value corresponding to the preset playback volume value of the terminal device is also 14 increments, then when the current volume adjustment value of the audio playback device reaches 14 increments, it is determined whether the current volume adjustment value of the terminal device also reaches 14 increments. If the current volume adjustment value of the terminal device is greater than or equal to 14 increments, the terminal device determines that the playback volume after the audio playback device's volume adjustment exceeds the hearing protection threshold. In other words, when the sum of the volume adjustment values ​​of the audio playback device and the terminal device is greater than 28 increments, the combined result of the audio playback device's volume adjustment exceeding the hearing protection threshold is considered to be true.

[0088] In another possible implementation, if the current playback volume of the terminal device is less than a preset value, when the audio playback device reaches the third volume adjustment value, the third volume adjustment value is the default value that the playback volume of the audio playback device after volume adjustment does not exceed the hearing protection threshold; then the audio playback volume of the audio playback device is adjusted according to the third volume adjustment value.

[0089] It should be understood that since the hearing protection threshold is obtained by combining the terminal device volume playback value corresponding to the preset value and the audio playback device volume playback value corresponding to the second volume adjustment value, if the current volume playback value of the terminal device is less than the preset value, it means that when the current volume adjustment value of the audio playback device reaches the second volume adjustment value, the playback volume after the audio playback device volume adjustment does not reach the hearing protection threshold.

[0090] It should also be understood that when the audio playback device reaches the third volume adjustment value, the audio playback volume of the audio playback device is adjusted according to the third volume adjustment value. The third volume adjustment value is the default value that the playback volume after the audio playback device volume adjustment does not exceed the hearing protection threshold. This third volume adjustment value can be preset in advance or updated in real time based on experience. This application does not limit this. For example, the third volume adjustment value can be 15 increments.

[0091] S403, when it is determined that the playback volume of the audio playback device after volume adjustment exceeds the hearing protection threshold, a prompt is made that the playback volume of the audio playback device after volume adjustment is too high.

[0092] It should be understood that when the terminal device determines, after combining the current volume adjustment value of the audio playback device and the current playback volume value of the terminal device, that the playback volume after the audio playback device volume adjustment exceeds the hearing protection threshold, it will prompt that the playback volume after the audio playback device volume adjustment is too high, allowing the user to further choose whether to continue adjusting.

[0093] In this embodiment, the volume adjustment method of this application is mainly described with the terminal device not supporting absolute volume. When the playback volume of the audio playback device after adjustment exceeds the hearing protection threshold, as determined by the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device, the terminal device prompts that the playback volume of the audio playback device after adjustment is too high. This can reduce the hearing damage caused by the sudden increase in volume of the audio playback device without the user's knowledge and improve the user experience.

[0094] In the above Figure 3 and Figure 4 In one embodiment, after the audio playback device establishes a Bluetooth connection with the terminal device in advance, for example, after the audio playback device establishes a Bluetooth audio / video remote control profile (AVRCP) protocol connection with the terminal device, the terminal device will send a volume change notification registration request to the audio playback device; the audio playback device determines whether the terminal device supports absolute volume based on whether the volume change notification registration request carries an absolute volume identifier.

[0095] It should be understood that if the volume change notification registration request carries an absolute volume identifier, the audio playback device determines that the terminal device supports absolute volume; if the volume change notification registration request does not carry an absolute volume identifier, the audio playback device determines that the terminal device does not support absolute volume.

[0096] In summary, the volume adjustment method provided in this application allows the terminal device to identify when the user adjusts the volume so that the playback volume of the audio playback device becomes too high, and then prompt the user whether to continue adjusting. The user can click to confirm and continue adjusting the current volume. This can reduce hearing damage caused by the sudden increase in volume of the audio playback device without the user's knowledge and improve the user experience.

[0097] It should also be understood that the various embodiments described above can be coupled to each other, and this application does not limit this. Furthermore, the sequence number of each process does not imply the order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0098] The above text combines Figures 1 to 4 The volume adjustment method of the embodiments of this application is described in detail below. Figures 5 to 7 The volume adjustment device of the present application embodiment is described in detail.

[0099] Figure 5This is a structural schematic diagram of a volume adjustment device 500 provided in one embodiment of the present application. The device 500 includes: an acquisition module 501 and a prompting module 502.

[0100] The acquisition module 501 is used to acquire the current volume adjustment value of the audio playback device; the acquisition module 501 is also used to acquire the volume adjustment value of the terminal device when the terminal device supports absolute volume, and the volume adjustment value of the terminal device is obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device; the prompting module 502 is used to prompt that the playback volume of the audio playback device after volume adjustment is too high when the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds the hearing protection threshold.

[0101] In some embodiments, the apparatus further includes: a determining module; an acquiring module 501, configured to acquire the current volume playback value of the terminal device; a determining module, configured to, when the terminal device does not support absolute volume, determine whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device; and a prompting module 502, configured to, when it is determined that the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold, prompt that the playback volume after volume adjustment of the audio playback device is too high.

[0102] In some embodiments, the determining module is specifically used to: if the current volume adjustment value of the audio playback device reaches the first volume adjustment value, determine whether the current volume playback value of the terminal device is the maximum volume playback value; if the current volume playback value of the terminal device is the maximum volume playback value, determine that the playback volume of the audio playback device after volume adjustment exceeds the hearing protection threshold.

[0103] In some embodiments, the determining module is specifically configured to: if the current volume playback value of the terminal device is not the maximum volume playback value, when the current volume adjustment value of the audio playback device reaches a second volume adjustment value, and the second volume adjustment value is greater than the first volume adjustment value; determine whether the current volume playback value of the terminal device is greater than a preset value, wherein the volume playback value of the terminal device corresponding to the preset value and the volume playback value of the audio playback device corresponding to the second volume adjustment value are combined to obtain the hearing protection threshold; if the current volume playback value of the terminal device is greater than the preset value, obtain the playback volume of the audio playback device after volume adjustment based on the second volume adjustment value of the audio playback device and the current volume playback value of the terminal device, and determine whether the playback volume of the audio playback device after volume adjustment exceeds the hearing protection threshold.

[0104] It should be understood that the device 500 here is embodied in the form of a functional module. The term "module" here can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that the device 500 can be specifically the terminal device in the above embodiments, or the functions of the terminal device in the above embodiments can be integrated into the device 500. The device 500 can be used to execute the various processes and / or steps corresponding to the terminal device in the above method embodiments; to avoid repetition, these will not be described further here.

[0105] The aforementioned device 500 has the function of implementing the corresponding steps performed by the terminal device in the aforementioned method; the aforementioned function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the aforementioned function.

[0106] Figure 6 This is a structural schematic diagram of a volume adjustment device 600 provided in another embodiment of this application. The device 600 includes a synchronization module 601.

[0107] The synchronization module 601 is used to synchronize the current volume adjustment value of the audio playback device to the terminal device when the terminal device supports absolute volume, so that when the playback volume corresponding to the current volume adjustment value of the audio playback device exceeds the hearing protection threshold, the terminal device prompts that the playback volume after the volume adjustment of the audio playback device is too high.

[0108] In some embodiments, the apparatus further includes a receiving module and a determining module. The receiving module is configured to receive a volume change notification registration request sent from the terminal device; the determining module is configured to determine whether the terminal device supports absolute volume based on whether the volume change notification registration request carries an absolute volume identifier, wherein the absolute volume is used to indicate whether the volume adjustment of the audio playback device and the terminal device is synchronized.

[0109] In some embodiments, the determining module is specifically configured to: determine that the terminal device supports absolute volume if the volume change notification registration request carries the identifier of the absolute volume; and determine that the terminal device does not support absolute volume if the volume change notification registration request does not carry the identifier of the absolute volume.

[0110] In some embodiments, the apparatus further includes: a sending module, configured to send the current volume adjustment value of the audio playback device to the terminal device when the terminal device does not support absolute volume, so that when the playback volume of the audio playback device after volume adjustment, determined based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device, exceeds the hearing protection threshold, the terminal device prompts that the playback volume of the audio playback device after volume adjustment is too high.

[0111] In some embodiments, the sending module is further configured to send the first volume adjustment value to the terminal device when the terminal device does not support absolute volume, if the volume adjustment value of the audio playback device reaches the first volume adjustment value, so that the terminal device determines that the playback volume after the audio playback device volume adjustment exceeds the hearing protection threshold when it determines that the current volume playback value of the terminal device is the maximum volume playback value.

[0112] In some embodiments, the sending module is further configured to, when the terminal device does not support absolute volume, send the second volume adjustment value to the terminal device if the audio playback device reaches the second volume adjustment value, so that when the terminal device determines that the current volume playback value of the terminal device is not the maximum volume playback value, it determines whether the current volume playback value of the terminal device is greater than a preset value, and if the current volume playback value of the terminal device is greater than the preset value, it obtains the playback volume after volume adjustment of the audio playback device based on the second volume adjustment value of the audio playback device and the current volume playback value of the terminal device, and determines whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold. The hearing protection threshold is obtained by combining the terminal device volume playback value corresponding to the preset value and the audio playback device volume playback value corresponding to the second volume adjustment value, wherein the second volume adjustment value is greater than the first volume adjustment value.

[0113] In some embodiments, the device further includes: an acquisition module and an adjustment module. The acquisition module is configured to acquire the current playback volume value of the terminal device when the terminal device does not support absolute volume; if the current playback volume value of the terminal device is less than a preset value, and the audio playback device reaches a third volume adjustment value, the third volume adjustment value being a default value indicating that the playback volume after volume adjustment does not exceed the hearing protection threshold; the adjustment module is configured to adjust the audio playback volume of the audio playback device according to the third volume adjustment value.

[0114] It should be understood that the device 600 here is embodied in the form of a functional module. The term "module" here can refer to application-specific integrated circuits (ASICs), electronic circuits, processors (e.g., shared processors, proprietary processors, or group processors, etc.) and memories for executing one or more software or firmware programs, integrated logic circuits, and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art will understand that device 600 may specifically be the audio playback device in the above embodiments, or the functions of the audio playback device in the above embodiments may be integrated into device 600. Device 600 may be used to execute the various processes and / or steps corresponding to the audio playback device in the above method embodiments; to avoid repetition, these will not be described again here.

[0115] The aforementioned device 600 has the function of implementing the corresponding steps performed by the audio playback device in the above method; the above function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above function.

[0116] Figure 7 This is a structural schematic diagram of an apparatus provided in yet another embodiment of this application. Figure 7 The apparatus shown can be used to perform the method of any of the foregoing embodiments.

[0117] like Figure 7 As shown, the device 700 of this embodiment includes: a memory 701, a processor 702, a communication interface 703, and a bus 704. The memory 701, processor 702, and communication interface 703 are interconnected via the bus 704.

[0118] The memory 701 may be a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 701 may store a program, and when the program stored in the memory 701 is executed by the processor 702, the processor 702 performs the various steps of the method shown in the above embodiments.

[0119] The processor 702 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, used to execute relevant programs to implement the various methods shown in the embodiments of this application.

[0120] The processor 702 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the method in this embodiment can be accomplished through integrated logic circuits in the processor 702 or through software instructions.

[0121] The processor 702 described above can also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor.

[0122] The steps of the method disclosed in the embodiments of this application can be directly manifested as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 701, and processor 702 reads the information in memory 701 and, in conjunction with its hardware, completes the functions required by the units included in the device of this application.

[0123] The communication interface 703 can use, but is not limited to, transceivers to enable communication between the device 700 and other devices or communication networks.

[0124] Bus 704 may include a pathway for transmitting information between various components of device 700 (e.g., memory 701, processor 702, communication interface 703).

[0125] It should be understood that the device 700 shown in the embodiments of this application may be an electronic device, or it may be a chip configured in an electronic device.

[0126] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0127] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0128] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0129] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0130] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0131] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0132] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0133] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A volume adjustment method, characterized in that, Applied to a terminal device, wherein the terminal device has pre-established a Bluetooth connection with an audio playback device, and the audio playback device is provided with a volume adjustment control or a volume adjustment touch area, the method includes: Obtain the current volume adjustment value of the audio playback device; When the terminal device supports absolute volume, the volume adjustment value of the terminal device is obtained. The volume adjustment value of the terminal device is the volume adjustment value of the terminal device obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device. When the playback volume of the audio playback device corresponding to the volume adjustment value of the terminal device exceeds the hearing protection threshold, the playback volume of the audio playback device after volume adjustment is prompted that it is too loud. Obtain the current playback volume value of the terminal device; When the terminal device does not support absolute volume, it determines whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device; when it is determined that the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold, it prompts that the playback volume after volume adjustment of the audio playback device is too high.

2. The volume adjustment method according to claim 1, characterized in that, When the terminal device does not support absolute volume, determining whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current playback volume value of the terminal device includes: If the current volume adjustment value of the audio playback device reaches the first volume adjustment value, determine whether the current volume playback value of the terminal device is the maximum volume playback value; If the current volume playback value of the terminal device is the maximum volume playback value, it is determined that the playback volume of the audio playback device after volume adjustment exceeds the hearing protection threshold.

3. The volume adjustment method according to claim 2, characterized in that, The step of determining whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device when the terminal device does not support absolute volume further includes: If the current volume playback value of the terminal device is not the maximum volume playback value, and the current volume adjustment value of the audio playback device reaches a second volume adjustment value, where the second volume adjustment value is greater than the first volume adjustment value. Determine whether the current volume playback value of the terminal device is greater than a preset value. The hearing protection threshold is obtained by combining the terminal device volume playback value corresponding to the preset value with the audio playback device volume playback value corresponding to the second volume adjustment value. If the current volume playback value of the terminal device is greater than the preset value, the playback volume after volume adjustment of the audio playback device is obtained according to the second volume adjustment value of the audio playback device and the current volume playback value of the terminal device, and it is determined whether the playback volume after volume adjustment of the audio playback device exceeds the hearing protection threshold.

4. A volume adjustment method, characterized in that, Applied to an audio playback device, wherein the audio playback device has a pre-established Bluetooth connection with a terminal device, and the audio playback device is provided with a volume adjustment control or a volume adjustment touch area, the method includes: When the terminal device supports absolute volume, the current volume adjustment value of the audio playback device is synchronized to the terminal device, so that when the playback volume corresponding to the current volume adjustment value of the audio playback device exceeds the hearing protection threshold, the terminal device prompts that the playback volume after the audio playback device volume adjustment is too high. When the terminal device does not support absolute volume, the current volume adjustment value of the audio playback device is sent to the terminal device so that when the playback volume after the audio playback device volume adjustment, determined based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device, exceeds the hearing protection threshold, the terminal device will prompt that the playback volume after the audio playback device volume adjustment is too high.

5. The volume adjustment method according to claim 4, characterized in that, After the audio playback device has pre-established a Bluetooth connection with the terminal device, the method further includes: Receive a volume change notification registration request sent from the terminal device; Based on whether the volume change notification registration request carries an absolute volume identifier, it is determined whether the terminal device supports absolute volume. The absolute volume is used to indicate whether the volume adjustment of the audio playback device and the terminal device is synchronized.

6. The volume adjustment method according to claim 5, characterized in that, The step of determining whether the terminal device supports absolute volume based on whether the absolute volume identifier is included in the volume change notification registration request includes: If the volume change notification registration request carries the identifier of the absolute volume, it is determined that the terminal device supports absolute volume; If the volume change notification registration request does not carry the identifier of the absolute volume, it is determined that the terminal device does not support absolute volume.

7. The volume adjustment method according to claim 4, characterized in that, The method further includes: If the terminal device does not support absolute volume, obtain the current volume playback value of the terminal device; If the current volume playback value of the terminal device is less than the preset value, when the audio playback device reaches the third volume adjustment value, the third volume adjustment value is the default value that the playback volume after the audio playback device adjusts the volume does not exceed the hearing protection threshold. Adjust the audio playback volume of the audio playback device according to the third volume adjustment value.

8. A volume control device, characterized in that, The device includes: The acquisition module is used to obtain the current volume adjustment value of the audio playback device; The acquisition module is further configured to obtain the volume adjustment value of the terminal device when the terminal device supports absolute volume. The volume adjustment value of the terminal device is obtained after synchronizing the current volume adjustment value of the audio playback device to the terminal device. The prompt module is used to prompt that the playback volume of the audio playback device is too high after the volume adjustment value of the terminal device exceeds the hearing protection threshold. The acquisition module is also used to acquire the current volume playback value of the terminal device; The determination module is used to determine, when the terminal device does not support absolute volume, whether the playback volume after the audio playback device adjusts exceeds the hearing protection threshold, based on the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device. The prompting module is also used to prompt that the playback volume of the audio playback device is too high when it is determined that the playback volume after the volume adjustment of the audio playback device exceeds the hearing protection threshold.

9. A volume control device, characterized in that, The device includes: The synchronization module is used to synchronize the current volume adjustment value of the audio playback device to the terminal device when the terminal device supports absolute volume, so that when the playback volume corresponding to the current volume adjustment value of the audio playback device exceeds the hearing protection threshold, the terminal device will prompt the audio playback device that the adjusted playback volume is too loud. The sending module is used to send the current volume adjustment value of the audio playback device to the terminal device when the terminal device does not support absolute volume, so that when the playback volume of the audio playback device after volume adjustment, determined according to the current volume adjustment value of the audio playback device and the current volume playback value of the terminal device, exceeds the hearing protection threshold, the terminal device will prompt that the playback volume of the audio playback device after volume adjustment is too high.

10. A volume control device, characterized in that, It includes a processor and a memory, the memory being used to store code instructions; the processor being used to execute the code instructions to perform the method as described in any one of claims 1 to 7.

11. A computer-readable storage medium, characterized in that, Used to store a computer program, the computer program including instructions for implementing the method as described in any one of claims 1 to 7.

12. A computer program product, the computer program product comprising computer program instructions, characterized in that, When the computer program instructions are executed on a computer, the computer causes the computer to perform the method as described in any one of claims 1 to 7.

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