WO2023193667A1

WO2023193667A1 - Clock synchronization method and system of audio device, and electronic device

Info

Publication number: WO2023193667A1
Application number: PCT/CN2023/085677
Authority: WO
Inventors: 张泰�; 程力
Original assignee: 华为技术有限公司
Priority date: 2022-04-06
Filing date: 2023-03-31
Publication date: 2023-10-12
Also published as: CN116938430A

Abstract

A clock synchronization method and system of an audio device, and an electronic device. A first audio device establishes a first communication connection with a second audio device; the first audio device calculates a first clock difference between the first audio device and the second audio device on the basis of the first communication connection; the first audio device establishes a second communication connection with the second audio device; the first audio device calculates a second clock difference between the first audio device and the second audio device on the basis of the second communication connection; the first audio device calculates a third clock difference on the basis of the first clock difference and the second clock difference; the first audio device and the second audio device perform clock synchronization on the basis of the third clock difference. According to the mode, two audio devices can establish different communication connections so as to measure clock differences between the two audio devices under the different communication connections, and a final clock difference is obtained by integrating the measured clock differences under the different communication connections, so that the synchronization between the two audio devices is realized, and the accuracy of clock synchronization is improved.

Description

Clock synchronization method, system and electronic equipment for audio equipment

Cross-references to related applications

[Correction 23.04.2023 under Rule 91]
This application requires the priority of the Chinese patent application submitted to the China Patent Office on April 6, 2022, with the application number 202210359514.0 and the application name "A clock synchronization method, system and audio equipment for audio equipment", and its entire content has been approved This reference is incorporated into this application.

Technical field

The present application relates to the field of electronic technology, and in particular to a clock synchronization method and system for audio equipment and electronic equipment.

Background technique

In order to improve the life experience at home and in the office, more and more people are pursuing better audio playback effects. For example, there are speaker sets on the market. A speaker set includes at least two speakers that can play the same song for better stereo sound. It should be noted that if the clocks of the two speakers are not synchronized, the stereo effect will be seriously affected.

Contents of the invention

The purpose of this application is to provide a clock synchronization method, system and electronic equipment for audio equipment.

In a first aspect, a clock synchronization method for audio equipment is provided. The method is applied to a system. The system includes a first audio equipment and a second audio equipment. The method includes: the first audio equipment and the The second audio device establishes a first communication connection; the first audio device or the second audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection. ; The first audio device and the second audio device establish a second communication connection; the first audio device or the second audio device calculates the first audio device and the second audio device based on the A second clock difference exists in the second communication connection; the first audio device or the second audio device calculates a third clock difference based on the first clock difference and the second clock difference; the first audio device Clock synchronization is performed with the second audio device based on the third clock difference.

In this way, two audio devices can establish different communication connections to measure the clock difference between the two audio devices under different communication connections. The final clock difference is obtained by combining the clock differences measured under different communication connections. To achieve synchronization between two audio devices, this application can improve the accuracy of clock synchronization compared to the clock difference measured by a single communication connection.

In a possible design, the second audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection, including: the first audio device Send a first signal to the second audio device and record the first sending time of the first signal; the second audio device receives the first information and record the first receiving time of the first signal. ; The first audio device sends a second signal to the second audio device, and the second signal carries the first sending time; the second audio device sends a third signal to the first audio device , and record the second sending moment of the third signal; the first audio device receives the third signal, and records the second receiving moment of the third signal; the first audio device sends a signal to the third signal. The second audio device sends a fourth signal, and the fourth signal carries the second receiving time; the second audio device is based on the first sending time, the first receiving time, the second sending time, At the second receiving time, the first clock difference is calculated. That is to say, when the first audio device establishes the first communication connection with the second audio device, the second audio device can obtain four times, namely the first sending time, the first receiving time, the second sending time, and the second receiving time. time, and the first clock difference is calculated through four times. In the embodiment of the present application, the clock difference measured by a single communication connection will not be the final clock difference. For example, the first clock difference and the second clock difference (the clock difference measured under the second communication connection) are determined together. The final clock difference is to improve the accuracy of clock synchronization.

In a possible design, the second audio device calculates a second clock difference between the first audio device and the second audio device based on the second communication connection, including: the first audio device Send a fifth signal to the second audio device, and record the third sending time of the fifth signal; the second audio device receives the fifth information, and record the third receiving time of the fifth signal. ; The first audio device sends a sixth signal to the second audio device, and the sixth signal carries the third sending time; the second audio device sends a seventh signal to the first audio device , and record the fourth sending moment of the seventh signal; the first audio device receives the seventh signal, and records the fourth receiving moment of the seventh signal; the first audio device sends the signal to the third The second audio device sends an eighth signal, and the eighth signal carries the fourth receiving time; the second audio device is based on the third sending time, the third receiving time, the fourth sending time, At the fourth receiving time, the second clock difference is calculated. That is to say, when the first audio device establishes a second communication connection with the second audio device, the second audio device can obtain four moments, namely the third sending moment, the third receiving moment, the fourth sending moment, and the fourth receiving moment. time, and the second clock difference is calculated through four times. In the embodiment of the present application, the clock difference measured by a single communication connection will not be the final clock difference. For example, the second clock difference is determined together with the first clock difference (the clock difference measured under the first communication connection). The final clock difference is to improve the accuracy of clock synchronization.

In a possible design, the third clock difference is an intermediate value of the first clock difference and the second clock difference. For example, the third clock difference is the average of the first clock difference and the second clock difference. In short, in this application, two audio devices can establish different communication connections to measure the clock difference between the two audio devices under different communication connections. The final clock difference can be obtained by integrating the clock differences measured under different communication connections. , to achieve synchronization between two audio devices. Compared with the clock difference measured by a single communication connection, this application can improve the accuracy of clock synchronization.

In a possible design, the first clock difference includes multiple values, the second clock difference includes multiple values, and the third clock difference is an intermediate value between the first average value and the second average value, The first average value is an average value of multiple values of the first clock difference, and the second average value is an average value of multiple values of the second clock difference. That is to say, when the first audio device establishes the first communication connection with the second audio device, the first clock difference obtained after multiple measurements has multiple values. When the first audio device establishes the second communication connection with the second audio device, During connection, the second clock difference obtained through multiple measurements has multiple values, and the final clock difference is determined through multiple values of the first clock difference and multiple values of the second clock difference, which is more accurate.

In a possible design, the first clock difference includes multiple values, and the second clock difference includes multiple values; the first audio device is based on the first clock difference and the second clock difference. Before calculating the third clock difference, the method further includes: the first audio device or the second audio device determining that a first variance of multiple values of the first clock difference is less than a first threshold, and/or determining that the The second variance of the plurality of values of the second clock difference is less than the second threshold. It should be noted that if the differences between the multiple values of the first clock difference are not large and the differences between the multiple values of the second clock difference are not large, the measurement result is considered to be valid, which can be based on the multiple values of the first clock difference and the second clock difference. Multiple values of clock difference determine the final clock difference to improve accuracy.

In a possible design, the method further includes: determining that the first variance is greater than or equal to a first threshold, and determining that the second variance is greater than or equal to a second threshold; the first audio device or The second audio device outputs prompt information, and the prompt information is used to prompt to recalculate the clock difference. It should be noted that if the differences between the multiple values of the first clock difference are not large, or the differences between the multiple values of the second clock difference are not large, the measurement results are considered invalid. For example, the communication is interfered and the difference is large. In this case, , which can prompt the user to re-measure in order to obtain accurate measurement results.

In a possible design, the first communication connection is a wireless connection, and the second communication connection is a wired connection.

It should be noted that the first communication connection and the second communication connection are different communication connections. For example, one is a wired connection and the other is a wireless connection; or both are wireless connections, but one is a WIFI connection and the other is a wireless connection. Is it a Bluetooth connection and so on.

In a second aspect, a clock synchronization method for audio equipment is also provided. The method is applied to a first audio equipment, and the method includes: establishing a first communication connection between the first audio equipment and a second audio equipment; An audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection; the first audio device and the second audio device establish a second communication connection; The first audio device calculates a second clock difference between the first audio device and the second audio device based on the second communication connection; the first audio device calculates a second clock difference between the first audio device and the second audio device based on the first clock difference and the The second clock difference calculates a third clock difference; the first audio device and the second audio device perform clock synchronization based on the third clock difference.

In a possible design, the first audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection, including:

The first audio device sends a first signal to the second audio device, and records the first sending moment of the first signal;

The first audio device receives a second signal sent by the second audio device, and the second signal carries a first receiving time. The first receiving time is when the second audio device receives the first information. moment;

The first audio device receives a third signal from the second audio device, and records a second reception moment of the third signal;

The first audio device receives a fourth signal from the second audio device, the fourth signal carries a second sending time, and the second sending time is when the second audio device sends the third signal. time;

The first audio device calculates the first clock difference based on the first sending time, the first receiving time, the second sending time, and the second receiving time.

In a possible design, the first audio device calculates the second clock difference that exists when the first audio device and the second audio device are connected based on the second communication, including:

The first audio device sends a fifth signal to the second audio device, and records a third sending moment of the fifth signal;

The first audio device receives a sixth signal sent by the second audio device, and the sixth signal carries a third receiving time, and the sixth receiving time is when the second audio device receives the fifth moment of signal;

The first audio device receives a seventh signal from the second audio device, and records a fifth reception moment of the seventh signal;

The first audio device receives an eighth signal from the second audio device, the eighth signal carries a fifth sending time, and the fifth sending time is the time when the second audio device sends the seventh signal. time;

The first audio device calculates the second clock difference based on the third sending time, the third receiving time, the fourth sending time, and the fourth receiving time.

In a possible design, the third clock difference is an intermediate value of the first clock difference and the second clock difference.

In a possible design, the first clock difference includes multiple values, the second clock difference includes multiple values, and the third clock difference is an intermediate value between the first average value and the second average value, The first average value is an average value of multiple values of the first clock difference, and the second average value is an average value of multiple values of the second clock difference.

In a possible design, the first clock difference includes multiple values, and the second clock difference includes multiple values;

Before the first audio device calculates a third clock difference based on the first clock difference and the second clock difference, it further includes:

determining that a first variance of a plurality of values of the first clock difference is less than a first threshold, and/or,

It is determined that a second variance of the plurality of values of the second clock difference is less than a second threshold.

In a possible design, the method further includes:

It is determined that the first variance is greater than or equal to a first threshold, and it is determined that the second variance is greater than or equal to a second threshold;

Prompt information is output, and the prompt information is used to prompt to recalculate the clock difference.

In a third aspect, a communication system is also provided, including: a first audio device and a second audio device;

The first audio device performs the steps of the first audio device in the method described in the first aspect;

The second audio device performs the steps of the second audio device in the method described in the first aspect.

In a fourth aspect, an electronic device is also provided, including:

processor, memory, and, one or more programs;

Wherein, the one or more programs are stored in the memory, and the one or more programs include instructions that, when executed by the processor, cause the electronic device to perform the above second aspect The method steps described.

In a fifth aspect, a computer-readable storage medium is also provided. The computer-readable storage medium is used to store a computer program. When the computer program is run on a computer, it causes the computer to execute the above-mentioned first aspect or the above-mentioned aspect. The method described in the second aspect.

In a sixth aspect, a computer program product is also provided, including a computer program, which when the computer program is run on a computer, causes the computer to execute the method described in the first aspect or the second aspect.

In a seventh aspect, a graphical user interface on an electronic device is also provided, the electronic device having a display screen, a memory, and a processor, the processor being configured to execute one or more computer programs stored in the memory, The graphical user interface includes a graphical user interface displayed when the electronic device executes the method described in the first aspect or the second aspect.

In an eighth aspect, embodiments of the present application further provide a chip, which is coupled to a memory in an electronic device and used to call a computer program stored in the memory and execute the technical solution of the first aspect or the second aspect. The present application "Coupled" in the embodiments means that two components are directly or indirectly combined with each other. Exemplarily, the chip includes a processor, and the processor is configured to read the computer program in the memory and execute the technical solution of the first aspect or the second aspect.

For the beneficial effects of the second to eighth aspects mentioned above, please refer to the beneficial effects of the first aspect and will not be repeated.

Description of the drawings

Figure 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

Figure 2 is another schematic diagram of a communication system provided by an embodiment of the present application;

Figure 3 is a schematic flowchart of a clock synchronization method for audio equipment provided by an embodiment of the present application;

Figure 4 is a schematic diagram of a clock difference determination process provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In the following, some terms used in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

The at least one involved in the embodiments of this application includes one or more; where multiple means greater than or equal to two. In addition, it should be understood that in the description of this specification, words such as "first" and "second" are only used for the purpose of distinguishing the description, and cannot be understood to express or imply relative importance, nor can they be understood to express Or suggestive order. For example, the first operation and the second operation do not represent the importance of the two or the order of the two, but are only used to differentiate the description. In the embodiment of this application, "and/or" only describes the association relationship, indicating that three relationships can exist, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone. these three situations. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the specification. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

Embodiments of the present application provide a clock synchronization method for audio equipment, which may be applicable to communication systems. The communication system includes at least two devices. Clock synchronization needs to be established between the at least two devices. The at least two devices may be any type of devices, as long as clock synchronization needs to be established. In the embodiment of the present application, it is taken as an example that the communication system includes at least two audio devices, for example, a first audio device and a second audio device. Among them, the first audio device is the main device. The second audio device is an auxiliary device or a slave device; alternatively, the first audio device is an auxiliary device or a slave device and the second audio device is a master device.

For example, the first audio device may be a device capable of playing sound, such as a portable electronic device such as a speaker, earphones, mobile phone, tablet computer, laptop computer, etc.; or it may also be a wearable device such as a watch or bracelet; or, It can be smart home devices such as smart screens and refrigerators; or it can be vehicle-mounted equipment, etc.; or it can be virtual reality (Virtual Reality, VR) equipment, augmented reality (Augmented Reality, AR) equipment, mixed reality technology ( Mixed Reality, MR) equipment, etc. In short, the embodiments of this application do not limit the specific type of the first equipment.

For example, the second audio device may be a device capable of playing sound, such as a portable electronic device such as a speaker, earphones, mobile phone, tablet computer, or notebook computer; or it may also be a wearable device such as a watch or bracelet; or, It can also be smart home equipment such as smart screens and refrigerators; or it can be vehicle-mounted equipment, etc.; or it can be virtual reality (Virtual Reality, VR) equipment, augmented reality (Augmented Reality, AR) equipment, or mixed reality technology (Mixed Reality, MR) device, etc. In short, the embodiments of this application do not limit the specific type of the second device.

The first audio device and the second audio device may be the same type of device. For example, the first audio device and the second audio device are both speakers. Of course, the first audio device and the second audio device may also be different types of devices. The embodiments of this application are not limiting.

For the convenience of understanding, this article mainly takes the example that both the first audio device and the second audio device are speakers.

For example, please refer to Figure 1, which is a schematic diagram of a communication system provided by an embodiment of the present application. As shown in Figure 1, a communication system includes a first audio device and a second audio device. Among them, the first audio device and the second audio device are both speakers. Among them, the first audio device and the second audio device can use the clock synchronization method provided by this application to establish clock synchronization. In this way, the clock synchronization of the two audio devices can improve the stereo sound effect.

The equipment related to this application is introduced below.

Figure 2 is a schematic structural diagram of a first audio device and a second audio device provided by an embodiment of the present application. As shown in Figure 2, the left half is the structure of the first audio device, and the right half is the structure of the second audio device.

The first audio device includes a first timing module, a first communication interface and a second communication interface. Among them, the first timing synchronization module is used to regularly start the time synchronization function of the first audio device, and the time synchronization function is also called a clock synchronization function. The first communication interface is used to establish a first communication connection with the second audio device. The second communication interface is used to establish a second communication connection with the second audio device. For example, the first communication interface may be a wireless interface, such as a wifi interface. The second communication interface may be, for example, a wired interface, such as a powerline communication (PLC) interface.

The first audio device also includes a data filtering module for filtering valid data among multiple clock differences. The specific implementation process will be introduced later. In some embodiments, when the data filtering module does not filter out valid data, an instruction can be sent to the first timing synchronization module to instruct the first timing synchronization module to re-execute the clock synchronization process.

The first audio device also includes a clock setting module for setting the clock of the first audio device to synchronize it with the clock in the second audio device.

The second audio device includes a second timing synchronization module, a third communication interface, and a fourth communication interface. Wherein, the second timing synchronization module is used to regularly start the timing synchronization module in the second audio device. The third communication interface is used to establish a first communication connection with the first audio device. For example, the third communication interface establishes a first communication connection with the first communication interface in the first audio device. The fourth communication interface is used to establish a second communication connection with the first audio device. For example, the fourth communication interface establishes a second communication connection with the second communication interface in the second audio device. Exemplarily, the third communication interface may be a wireless interface, such as a wifi interface. The fourth communication interface may be a wired interface, such as a powerline communication (PLC) interface.

The second audio device also includes a data filtering module, which is used to filter valid data among multiple clock differences. The specific implementation process will be introduced later. In some embodiments, when the data filtering module does not filter out valid data, an instruction can be sent to the second timing synchronization module to instruct the second timing synchronization module to re-execute the clock synchronization process.

The second audio device also includes a clock setting module for setting the clock of the second audio device to synchronize it with the clock in the first audio device.

It should be noted that in some embodiments, when the first audio device has a data filtering module and a clock setting module, the second audio device may not have a data filtering module and a clock setting module. Alternatively, when the first audio device does not have a data filtering module and a clock setting module, a data filtering module and a clock setting module may be provided in the second audio device. Of course, both the first audio device and the second audio device may have a data filtering module and a clock setting module. For example, an audio device with a data filtering module and a clock setting module can serve as a master device, and an audio device without a data filtering module and a clock setting module can serve as a slave device; or, an audio device with a data filtering module and a clock setting module can serve as a slave device. As a master device, the audio device without data filtering module and clock setting module acts as a slave device.

The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a schematic flowchart of a clock synchronization method for audio equipment provided by an embodiment of the present application. The process includes:

S301, the first audio device starts clock synchronization.

For example, the first timing synchronization module in the first audio device will regularly start the clock synchronization function. For example, every other day or every 7 days, the first timing synchronization module will start the clock synchronization function regularly. In other embodiments, the first audio device may also initiate clock synchronization under user operation, and the user operation may be any type of operation input by the user on the first audio device.

S302, the second audio device starts clock synchronization.

For example, the second timing synchronization module in the second audio device will regularly start the clock synchronization function. For example, every other day or every 7 days, the second timing synchronization module will start the clock synchronization function regularly. The cycles in which the first timing synchronization module and the second timing synchronization module start the clock synchronization function may be the same or different. In other embodiments, the second audio device can also initiate clock synchronization under user operation, and the user operation can be any type of operation input by the user on the second audio device.

S303. The first audio device establishes a first communication connection with the second audio device.

Wherein, the first communication connection can be a wired connection or a wireless connection. If it is a wireless connection, it can be a variety of wireless connection methods such as Bluetooth and WIFI.

S304. The first audio device and the second audio device calculate a first clock difference.

The calculation process of the first clock difference will be described below with reference to FIG. 4 . The process includes the following steps:

Step a: The first audio device sends the first message to the second audio device, and records the sending time T1 of the first message. The first message may be a synchronization (synchronize, Sync) message.

Step b: The second audio device receives the first message and records the receiving time T2 of the first message.

Step c: The first audio device sends a second message to the second audio device, and the second message carries the sending time T1. The second message may be a Follow_Up message. Therefore, the second audio device obtains T1.

In step d, the second audio device sends the third message to the first audio device, and records the sending time T3 of the third message. The third message may be a delay request (Delay_Req) message.

Step e: The first audio device receives the third message and records the receiving time T4 of the third message.

Step f: The first audio device sends a fourth message to the second audio device, and the fourth message carries the reception time T4. The fourth message may be a delay request (Delay_Resp) response.

In other words, the second audio device side obtains four times, T1, T2, T3, and T4. The second audio device can calculate the first clock difference based on these four moments. For example, the first clock difference (not shown in Figure 4) between the first audio device and the second audio device is expressed as Tms and satisfies the following formula, Tmsd=T2+Tms-T1Tsmd=T4–(Tms+T3)

Among them, Tmsd represents the duration of information from the first audio device to the second audio device, and Tsmd represents the duration of information from the second audio device to the first audio device. Assuming the symmetry of the communication path, Tmsd==Tsmd, so the above two The formula is transformed into: T2+Tms–T1=T4–(Tms+T3)

Therefore, Tms=1/2*(T2–T1+T4-T3) can be solved through the above formula, that is, the first clock difference is 1/2*(T2–T1+T4-T3).

It should be noted that in Figure 4 above, it starts with the first audio device sending the first message to the second audio device until the second audio device obtains four times (T1, T2, T3, T4) according to these four times. Calculate the first clock difference at a moment as an example. In other embodiments, the second audio device may start sending the first information to the first audio device, wait until the first audio device obtains four moments, and determine the relationship between the first audio device and the second audio device based on the four moments. clock difference. To put it simply, the roles of the first audio device and the second audio device are reversed in the above steps a to f.

It should be noted that Figure 4 is an implementation manner of S304. In other embodiments, the first clock difference can also be calculated in other ways. For example, the first clock difference is equal to the first duration plus the second duration. half. The first duration is the duration of the message from the first audio device to the second audio device, and the second duration is the duration of the response to the message from the second audio device to the first audio device.

S305. The first audio device establishes a second communication connection with the second audio device.

Wherein, the second communication connection can be a wired connection or a wireless connection. If it is a wireless connection, it can be a variety of wireless connection methods such as Bluetooth and WIFI. The second communication connection and the first communication connection may be in the same connection mode, or may be in different connection modes. In order to improve the clock synchronization accuracy, the first communication connection and the second communication connection may be different connections, for example, one is a wired connection and the other is a wireless connection. In this case, the interference between the two connection methods is small and the calculated clock difference is more accurate.

In some embodiments, before the first audio device establishes the second communication connection with the second audio device, the first communication connection may or may not be interrupted. In order to improve the accuracy of clock synchronization, the first communication connection can be interrupted to reduce interference to the second communication connection and improve the calculated clock difference to be more accurate.

S306: The first audio device and the second audio device calculate a second clock difference.

The calculation method of the second clock difference is the same as the calculation method of the first clock difference mentioned above, and will not be repeated.

S307: The first audio device and the second audio device calculate a third clock difference based on the first clock difference and the second clock difference.

In this embodiment of the present application, the calculation method of the third clock difference includes at least one of the following:

Method 1, the first clock difference is a value, represented by A, and the second clock difference is a value, represented by B. The third clock difference is the intermediate value of the first clock difference and the second clock difference, for example, the average value of the first clock difference and the second clock difference, that is, (A+B)/2.

Method 2: the first clock difference has multiple values, such as multiple A's, and the second clock difference has multiple values, such as multiple B's. The third clock difference is a third average value of the first average value (the average value of multiple A's) and the second average value (the average value of multiple B's). Among them, the first clock difference has multiple values. It can be understood that the process in Figure 4 has been executed multiple times, because each time it is executed, one clock difference is obtained, and if it is repeated multiple times, multiple clock differences are obtained, so the first clock difference There are multiple values. The second clock difference has multiple values, and the same principle is used.

Method 3: The first clock difference is multiple values, such as multiple A's. Calculate the variance of multiple A's and obtain the variance 1. The second clock difference is multiple values, such as multiple Bs. Calculate the variance of multiple Bs and obtain the variance 2.

If variance 1 is less than threshold 1, and variance 2 is less than threshold 2, then the first clock difference and the second clock difference are considered to be valid data, and the third clock difference can be calculated based on the first clock difference and the second clock difference, for example, use Method 2 above calculates the third clock difference. Threshold 1 and threshold 2 may be the same or different, and are not limited in the embodiments of this application.

If variance 1 is greater than or equal to threshold 1, and/or variance 2 is greater than or equal to threshold 2, then the first clock difference and the second clock difference are considered to be invalid data, and there is no need to calculate the third clock difference based on the first clock difference and the second clock difference. Clock difference. At this time, the first audio device or the second audio device can re-execute the clock synchronization process, for example, re-execute S301.

S308: The first audio device and the second audio device perform clock configuration based on the third clock difference.

Assuming that the third clock difference is 500ms, the clock of the second audio device can be controlled to increase by 500ms. Assuming that the third clock difference is -500ms, the clock of the second audio device can be controlled to be reduced by 500ms.

FIG. 5 is a schematic structural diagram of an electronic device 500 provided by an embodiment of the present application. The electronic device 500 may be the first audio device or the second audio device mentioned above. As shown in Figure 5, the electronic device 500 may include: one or more processors 501; one or more memories 502; a communication interface 503, and one or more computer programs 504. Each of the above devices can communicate through one or more Bus 505 connection. Where the one or more computer programs 504 are stored in the memory 502 and configured to be executed by the one or more processors 501 , the one or more computer programs 304 include instructions. For example, the above instructions can be used to perform relevant steps of the first audio device or the second audio device in the above corresponding embodiments. The communication interface 503 is used to implement communication between the first audio device or the second audio device and other devices. For example, the communication interface may be a transceiver.

An embodiment of the present application also provides a communication system. The communication system includes a first audio device and a second audio device. For example, the first audio device may be a speaker, a mobile phone, a tablet, a PC, a watch, or other devices. The second audio device may be a speaker, mobile phone, tablet, PC, watch, etc. The structure of the first audio device and the second audio device can be seen in Figure 5 . For example, when the electronic device 500 shown in FIG. 5 is a first audio device, when the instructions of one or more computer programs 504 are executed by the processor, the first audio device is caused to execute the first audio device as described above ( For example, main speakers). When the electronic device 500 shown in FIG. 5 is a second audio device, when the instructions of one or more computer programs 504 are executed by the processor, the electronic device 500 is caused to execute the second audio device (such as , auxiliary speaker) steps.

In the above-mentioned embodiments provided by the present application, the method provided by the embodiments of the present application is introduced from the perspective of an electronic device (such as a first audio device or a second audio device) as the execution subject. In order to implement each function in the method provided by the above embodiments of the present application, the electronic device may include a hardware structure and/or a software module to implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is performed as a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.

As used in the above embodiments, depending on the context, the terms "when" or "after" may be interpreted to mean "if..." or "after" or "in response to determining..." or "in response to detecting …”. Similarly, depending on the context, the phrase "when determining..." or "if (stated condition or event) is detected" may be interpreted to mean "if it is determined..." or "in response to determining..." or "on detecting (stated condition or event)” or “in response to detecting (stated condition or event)”. In addition, in the above embodiments, relational terms such as first and second are used to distinguish one entity from another entity, without limiting any actual relationship and order between these entities.

Reference in this specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Therefore, the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in other embodiments", etc. appearing in different places in this specification are not necessarily References are made to the same embodiment, but rather to "one or more but not all embodiments" unless specifically stated otherwise. The terms “including,” “includes,” “having,” and variations thereof all mean “including but not limited to,” unless otherwise specifically emphasized.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with the embodiments of the present invention are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, e.g., the computer instructions may be transferred from a website, computer, server, or data center Transmission to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more available media integrated. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), etc. As long as there is no conflict, the solutions of the above embodiments can be used in combination.

It should be noted that part of this patent application document contains content protected by copyright. The copyright owner retains copyright except in making copies of the contents of the patent document or records in the Patent Office.

Claims

A clock synchronization method for audio equipment, characterized in that the method is applied to a system, the system includes a first audio equipment and a second audio equipment, and the method includes:

The first audio device establishes a first communication connection with the second audio device;

The first audio device or the second audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection;

The first audio device establishes a second communication connection with the second audio device;

The first audio device or the second audio device calculates a second clock difference between the first audio device and the second audio device based on the second communication connection;

The first audio device or the second audio device calculates a third clock difference based on the first clock difference and the second clock difference;

The first audio device and the second audio device perform clock synchronization based on the third clock difference.
The method of claim 1, wherein the second audio device calculates a first clock difference between the first audio device and the second audio device based on the first communication connection, including:

The first audio device sends a first signal to the second audio device, and records the first sending moment of the first signal;

The second audio device receives the first information and records the first reception moment of the first signal;

The first audio device sends a second signal to the second audio device, and the second signal carries the first sending time;

The second audio device sends a third signal to the first audio device, and records the second sending moment of the third signal;

The first audio device receives the third signal and records the second reception moment of the third signal;

The first audio device sends a fourth signal to the second audio device, where the fourth signal carries the second receiving time;

The second audio device calculates the first clock difference based on the first sending time, the first receiving time, the second sending time, and the second receiving time.
The method of claim 1, wherein the second audio device calculates a second clock difference between the first audio device and the second audio device based on the second communication connection, including:

The first audio device sends a fifth signal to the second audio device, and records a third sending moment of the fifth signal;

The second audio device receives the fifth information and records the third reception moment of the fifth signal;

The first audio device sends a sixth signal to the second audio device, where the sixth signal carries the third sending time;

The second audio device sends a seventh signal to the first audio device, and records a fourth sending moment of the seventh signal;

The first audio device receives the seventh signal and records a fourth reception moment of the seventh signal;

The first audio device sends an eighth signal to the second audio device, the eighth signal carries the fourth time of reception;

The second audio device calculates the second clock difference based on the third sending time, the third receiving time, the fourth sending time, and the fourth receiving time.
The method of claim 1, wherein the third clock difference is an intermediate value of the first clock difference and the second clock difference.
The method of claim 1, wherein the first clock difference includes a plurality of values, the second clock difference includes a plurality of values, and the third clock difference is a first average value and a second average value. The first average value is the average value of multiple values of the first clock difference, and the second average value is the average value of multiple values of the second clock difference.
The method of claim 1, wherein the first clock difference includes a plurality of values, the second clock difference includes a plurality of values; the first audio device is based on the first clock difference and the Before calculating the third clock difference, the second clock difference also includes:

The first audio device or the second audio device determines that a first variance of multiple values of the first clock difference is less than a first threshold, and/or determines that a first variance of multiple values of the second clock difference is less than a first threshold. The second variance is less than the second threshold.
The method of claim 6, further comprising:

It is determined that the first variance is greater than or equal to a first threshold, and it is determined that the second variance is greater than or equal to a second threshold;

The first audio device or the second audio device outputs prompt information, and the prompt information is used to prompt to recalculate the clock difference.
The method of claim 1, wherein the first communication connection is a wireless connection, and the second communication connection is a wired connection.
A communication system, characterized by including: a first audio device and a second audio device;

The first audio device performs the steps of the first audio device in the method according to any one of claims 1 to 8;

The second audio device performs the steps of the second audio device in the method according to any one of claims 1 to 8.
An electronic device, characterized by including:

processor, memory, and, one or more programs;

Wherein, the one or more programs are stored in the memory, and the one or more programs include instructions that, when executed by the processor, cause the electronic device to perform the tasks of claims 1 to The steps of the first audio device or the second audio device in the method described in any one of 8.
A computer-readable storage medium, characterized in that the computer-readable storage medium is used to store a computer program. When the computer program is run on a computer, it causes the computer to execute any one of claims 1 to 8. method described in the item.