CN111817812A - Clock synchronization method, system and medium of true wireless earphone and true wireless earphone - Google Patents
Clock synchronization method, system and medium of true wireless earphone and true wireless earphone Download PDFInfo
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- CN111817812A CN111817812A CN202010778329.6A CN202010778329A CN111817812A CN 111817812 A CN111817812 A CN 111817812A CN 202010778329 A CN202010778329 A CN 202010778329A CN 111817812 A CN111817812 A CN 111817812A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
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Abstract
The invention provides a clock synchronization method, a system and a medium of a real wireless earphone and the real wireless earphone, wherein the real wireless earphone comprises a main ear and an auxiliary ear, the main ear is connected with the auxiliary ear, and the method comprises the following steps: the method comprises the steps that a main ear is connected with an intelligent terminal, and a synchronization window of the main ear is opened when the main ear receives data sent by the intelligent terminal; judging whether the time for the main ear to receive the synchronous words sent by the intelligent terminal is in the center of the synchronous window; when the time is not in the right center of the synchronization window, dynamically adjusting the clock of the main ear to keep the clock synchronization of the main ear and the intelligent terminal; the invention keeps the clock of the main ear of the real wireless earphone and the clock of the intelligent terminal synchronous by dynamically adjusting the clock of the main ear of the real wireless earphone, thereby fundamentally avoiding the problem of overlapping transmission time when the intelligent terminal and the main ear of the real wireless earphone and the auxiliary ear of the real wireless earphone synchronously transmit data.
Description
Technical Field
The invention belongs to the technical field of clock synchronization, and particularly relates to a clock synchronization method, a clock synchronization system and a clock synchronization medium of a true wireless earphone and the true wireless earphone.
Background
The real wireless earphone refers to an earphone without a traditional connecting line, and comprises a Bluetooth earphone, an infrared earphone and the like; the existing true wireless earphone is a wireless Bluetooth earphone mode that a mobile phone is connected with a main ear and then connected with an auxiliary ear, so that real wireless transmission of voice call and stereo audio is realized, but when synchronous data transmission is carried out in some synchronous transmission scenes, due to the fact that clocks of the mobile phone and the main ear have deviation, the phenomenon that data receiving and sending moments of the mobile phone and two communication links of the main ear and the auxiliary ear are overlapped can be caused along with the advance of time.
Disclosure of Invention
In view of the above drawbacks of the prior art, an object of the present invention is to provide a clock synchronization method, system, medium and true wireless headset for solving the problem of overlapping of transmitting and receiving times due to clock skew when the true wireless headset performs synchronous data transmission in the prior art.
To achieve the above and other related objects, the present invention provides a clock synchronization method for a true wireless headset, the true wireless headset including a main ear and an auxiliary ear, the main ear being connected to the auxiliary ear, comprising the steps of: establishing connection between the main ear and an intelligent terminal, and opening a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal; judging whether the time for the main ear to receive the synchronous words sent by the intelligent terminal is in the center of the synchronous window; when the time is not at the exact center of the synchronization window, the clock of the main ear is dynamically adjusted to keep the clock synchronization of the main ear and the intelligent terminal.
In an embodiment of the present invention, the time being not at the exact center of the synchronization window includes the following two cases: the time is forward of the exact center of the synchronization window; the time is behind the exact center of the synchronization window; when the time is not at the exact center of the synchronization window, dynamically adjusting the clock of the master ear includes the following two cases: when the time is in front of the right center of the synchronous window, performing forward compensation on the clock of the main ear to accelerate the clock of the main ear; when the time is behind the exact center of the synchronization window, then the clock of the master ear is compensated in reverse to slow down the clock of the master ear.
In an embodiment of the present invention, when the time is not at the exact center of the synchronization window, dynamically adjusting the clock of the master ear includes: calculating a deviation between the time and a midpoint of the synchronization window to dynamically adjust a clock of the master ear based on the deviation.
In an embodiment of the present invention, dynamically adjusting the clock of the main ear includes: and adjusting the adjustable matching capacitor on the chip in the main ear.
In an embodiment of the invention, the adjustable matching capacitor adjusts a capacitance value by controlling a switch.
In an embodiment of the present invention, the method further includes: when the time is at the very center of the synchronization window, there is no need to adjust the clock of the master ear.
The invention provides a clock synchronization system of a real wireless earphone, wherein the real wireless earphone comprises a main ear and an auxiliary ear, the main ear is connected with the auxiliary ear, and the clock synchronization system comprises: the device comprises a connecting module, a judging module and an adjusting module; the connection module is used for establishing connection between the main ear and the intelligent terminal and opening a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal; the judging module is used for judging whether the time when the main ear receives the synchronous words sent by the intelligent terminal is in the center of the synchronous window; the adjusting module is used for dynamically adjusting the clock of the main ear when the time is not in the positive center of the synchronization window so as to keep the clock synchronization of the main ear and the intelligent terminal.
The present invention provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described method of clock synchronization for a true wireless headset.
The invention provides a true wireless earphone, comprising: a processor and a memory; the memory is used for storing a computer program; the processor is used for executing the computer program stored in the memory so as to enable the real wireless earphone to execute the clock synchronization method of the real wireless earphone.
The invention provides a clock synchronization system of a real wireless earphone, which comprises the real wireless earphone and an intelligent terminal; the intelligent terminal is used for sending data to the main ear of the true wireless earphone; the data includes a sync word.
As described above, the clock synchronization method, system, medium and true wireless headset of the present invention have the following advantages:
compared with the prior art, the clock of the main ear of the real wireless earphone is dynamically adjusted to keep synchronous with the clock of the intelligent terminal, so that the problem of overlapping transmission time when synchronous data transmission is simultaneously carried out between the intelligent terminal and the main ear of the real wireless earphone and between the main ear of the real wireless earphone and the auxiliary ear of the real wireless earphone is fundamentally avoided.
Drawings
Fig. 1 is a flowchart illustrating a clock synchronization method of a wireless headset according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a clock synchronization system of a real wireless headset according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a real wireless headset according to an embodiment of the invention.
Fig. 4 is a schematic structural diagram of a clock synchronization system of a real wireless headset according to another embodiment of the invention.
Description of the reference symbols
21 connection module
22 judging module
23 adjustment module
31 processor
32 memory
41 true wireless earphone
42 intelligent terminal
S1-S3
Detailed Description
The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Compared with the prior art, the clock synchronization method, the clock synchronization system, the clock synchronization medium and the real wireless earphone of the invention keep synchronization with the clock of the intelligent terminal by dynamically adjusting the clock of the main ear of the real wireless earphone, thereby fundamentally avoiding the problem of overlapping transmission time when the intelligent terminal and the main ear of the real wireless earphone, and the main ear of the real wireless earphone and the auxiliary ear of the real wireless earphone simultaneously carry out synchronous data transmission.
As shown in fig. 1, in an embodiment, the clock synchronization method of the present invention is for a real wireless headset, wherein the real wireless headset includes a main ear and an auxiliary ear, and the main ear is connected to the auxiliary ear.
It should be noted that, in the true wireless headset using the forwarding mechanism, a mode that the mobile phone is connected to the main ear and the main ear is connected to the sub-ear is adopted, in this connection mode, the main ear is a slave of the mobile phone, the sub-ear is a slave of the main ear, a clock used for communication in the bluetooth system is based on the host, and in some synchronous transmission scenarios, the time for the master and the slave of the bluetooth system to receive and transmit data is based on the clock of the host.
The method comprises the following steps:
and S1, establishing connection between the main ear and the intelligent terminal, and opening a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal.
It should be noted that the intelligent terminal includes, but is not limited to, a smart phone, a tablet computer, a PDA, and other terminal devices with a data processing function; generally, an intelligent terminal is a terminal device that has an independent operating system, can be used by a user to install programs provided by third-party service providers such as software and games, continuously expands the functions of a handheld device through the programs, and can realize wireless network access through a mobile communication network.
Specifically, after the main ear of the real wireless earphone is connected with the intelligent terminal, the main ear opens a synchronization window of the main ear when receiving data of the intelligent terminal.
It should be noted that a sync word is a term in data transmission, and it is actually a number, and this number may be a byte, two bytes, or multiple bytes, and its main function is to align data during data transmission and processing, and determine whether the data is valid data, and usually appears in a data frame; the synchronous window is a window for receiving the master synchronous head from the slave in a timing way in the Bluetooth system.
And step S2, judging whether the time when the main ear receives the synchronous words sent by the intelligent terminal is in the center of the synchronous window.
Specifically, whether the time when the main ear receives the synchronous word sent by the intelligent terminal is in the positive center of the synchronous window is determined by comparing the time when the main ear receives the synchronous word sent by the intelligent terminal with the positive center of the synchronous window.
And step S3, when the time is not at the exact center of the synchronization window, dynamically adjusting the clock of the main ear to keep the clock of the main ear and the clock of the intelligent terminal synchronous.
In one embodiment, the time being not at the exact center of the synchronization window includes the following two cases: the time is forward of the exact center of the synchronization window; the time is just behind the center of the synchronization window.
When the time is not at the exact center of the synchronization window, dynamically adjusting the clock of the master ear includes the following two cases:
(1) and when the time is in front of the right center of the synchronous window, performing forward compensation on the clock of the main ear to accelerate the clock of the main ear.
When the time is in front of the center of the synchronization window, it indicates that the clock of the main ear is slower than that of the smart terminal, and at this time, the clock of the main ear needs to be compensated in the forward direction to speed up the clock of the main ear and keep the clock of the main ear synchronized with the clock of the smart terminal.
(2) When the time is behind the exact center of the synchronization window, then the clock of the master ear is compensated in reverse to slow down the clock of the master ear.
It should be noted that, when the time is behind the center of the synchronization window, it indicates that the clock of the main ear is faster than that of the smart terminal, and at this time, the clock of the main ear needs to be compensated reversely to slow down the clock of the main ear so as to keep synchronization with the clock of the smart terminal.
In one embodiment, dynamically adjusting the clock of the master ear when the time is not at the exact center of the synchronization window comprises: calculating a deviation between the time and a midpoint of the synchronization window to dynamically adjust a clock of the master ear based on the deviation.
Specifically, the magnitude of the adjustment to the master ear clock is determined by calculating the deviation between the time and the exact center of the synchronization window.
Further, the amplitude is determined by the ratio of the deviation to the synchronization window width.
In one embodiment, dynamically adjusting the clock of the master ear comprises: and adjusting the adjustable matching capacitor on the chip in the main ear.
Specifically, an adjustable matching capacitor is arranged on a built-in chip of the main ear, and the clock of the main ear is dynamically adjusted by adjusting the capacitance value of the adjustable matching capacitor.
It should be noted that, the capacitance value of the adjustable matching capacitor becomes large, and the clock corresponding to the main ear becomes slow; on the contrary, when the capacitance value of the adjustable matching capacitor becomes smaller, the clock corresponding to the main ear becomes faster; therefore, for the two cases, if the clock of the main ear is slower than that of the intelligent terminal, the adjustable matching capacitance is correspondingly reduced, and the larger the deviation between the time and the right center of the synchronization window is, the larger the amplitude of clock adjustment for the main ear is; on the contrary, if the clock of the main ear is faster than that of the intelligent terminal, the adjustable matching capacitor is correspondingly increased, and the larger the deviation between the time and the right center of the synchronization window is, the larger the amplitude of the clock adjustment of the main ear is.
In an embodiment, the adjustable matching capacitor adjusts the capacitance value by controlling the switch.
Preferably, the control switch is controlled by software to adjust the capacitance value of the adjustable matching capacitor.
In one embodiment, the method further comprises adjusting the clock of the master ear when the time is at the very center of the synchronization window.
It should be noted that, when the time is located at the center of the synchronization window, it indicates that the clock of the master ear is synchronized with the clock of the smart terminal, and at this time, it is not necessary to adjust the clock of the master ear.
Furthermore, the clock synchronization method of the real wireless earphone enables the main ear of the real wireless earphone to be dynamically consistent with the clock of the intelligent terminal, and meanwhile, the auxiliary ear of the real wireless earphone also becomes to follow the intelligent terminal; the intelligent terminal and the main ear are a subsystem, and the clock of the subsystem is based on the intelligent terminal; the main ear and the auxiliary ear are a subsystem, and in the subsystem, the clock of the main ear is used as the standard, so that the problem of overlapping of synchronous transmission time is fundamentally avoided.
It should be noted that the protection scope of the clock synchronization method of the true wireless headset according to the present invention is not limited to the execution sequence of the steps listed in this embodiment, and all the solutions implemented by adding or subtracting steps and replacing steps in the prior art according to the principle of the present invention are included in the protection scope of the present invention.
As shown in fig. 2, in an embodiment of the invention, the clock synchronization system of the real wireless headset includes a main ear and an auxiliary ear, wherein the main ear is connected to the auxiliary ear, and the system includes a connection module 21, a determination module 22 and an adjustment module 23.
The connection module 21 is configured to establish a connection between the main ear and the intelligent terminal, and open a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal.
The judging module 22 is configured to judge whether the time when the main ear receives the synchronization word sent by the intelligent terminal is in the center of the synchronization window.
The adjusting module 23 is configured to dynamically adjust the clock of the main ear when the time is not at the very center of the synchronization window, so as to keep the clock of the main ear and the clock of the smart terminal synchronized.
It should be noted that the structures and principles of the connection module 21, the judgment module 22 and the adjustment module 23 correspond to the steps in the clock synchronization method of the real wireless headset one by one, and therefore, the description thereof is omitted.
It should be noted that the division of the modules of the above system is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these modules can be realized in the form of software called by processing element; or may be implemented entirely in hardware; and part of the modules can be realized in the form of calling software by the processing element, and part of the modules can be realized in the form of hardware. For example, the x module may be a processing element that is set up separately, or may be implemented by being integrated in a chip of the system, or may be stored in a memory of the system in the form of program code, and the function of the x module may be called and executed by a processing element of the system. Other modules are implemented similarly. In addition, all or part of the modules can be integrated together or can be independently realized. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in the form of software.
For example, the above modules may be one or more integrated circuits configured to implement the above methods, such as: one or more Application Specific Integrated Circuits (ASICs), or one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, when one of the above modules is implemented in the form of a Processing element scheduler code, the Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
The storage medium of the present invention stores thereon a computer program that, when executed by a processor, implements the above-described clock synchronization method for a true wireless headset. The storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
As shown in fig. 3, the true wireless headset of the present invention includes a processor 31 and a memory 32.
The memory 32 is for storing a computer program; preferably, the memory 32 comprises: various media that can store program codes, such as ROM, RAM, magnetic disk, U-disk, memory card, or optical disk.
The processor 31 is connected to the memory 32 and configured to execute the computer program stored in the memory 32, so that the real wireless headset performs the above-mentioned clock synchronization method of the real wireless headset.
Preferably, the Processor 31 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; the integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components.
As shown in fig. 4, in an embodiment, the clock synchronization system of the real wireless headset of the present invention includes the real wireless headset 41 and the intelligent terminal 42.
Specifically, the intelligent terminal 42 is configured to send data to the main ear of the true wireless headset 41; the data includes a sync word.
It should be noted that the intelligent terminal 42 includes, but is not limited to, a smart phone, a tablet computer, a PDA, and other terminal devices with data processing functions; generally, an intelligent terminal is a terminal device that has an independent operating system, can be used by a user to install programs provided by third-party service providers such as software and games, continuously expands the functions of a handheld device through the programs, and can realize wireless network access through a mobile communication network.
Further, the working principle of the clock synchronization system of the real wireless earphone is the same as that of the clock synchronization method of the real wireless earphone, and is not described herein again.
It should be noted that the clock synchronization system of the real wireless headset of the present invention can implement the clock synchronization method of the real wireless headset of the present invention, but the implementation apparatus of the clock synchronization method of the real wireless headset of the present invention includes but is not limited to the structure of the clock synchronization system of the real wireless headset enumerated in this embodiment, and all the structural modifications and substitutions of the prior art made according to the principles of the present invention are included in the protection scope of the present invention.
In summary, compared with the prior art, the clock synchronization method, the clock synchronization system, the clock synchronization medium and the real wireless earphone of the present invention keep synchronous with the clock of the intelligent terminal by dynamically adjusting the clock of the main ear of the real wireless earphone, thereby fundamentally avoiding the problem of overlapping transmission time when the intelligent terminal and the main ear of the real wireless earphone, and the main ear of the real wireless earphone and the auxiliary ear of the real wireless earphone simultaneously perform synchronous data transmission; therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A method of clock synchronization for a true wireless headset comprising a primary ear and a secondary ear, the primary ear being connected to the secondary ear, comprising the steps of:
establishing connection between the main ear and an intelligent terminal, and opening a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal;
judging whether the time for the main ear to receive the synchronous words sent by the intelligent terminal is in the center of the synchronous window;
when the time is not at the exact center of the synchronization window, the clock of the main ear is dynamically adjusted to keep the clock synchronization of the main ear and the intelligent terminal.
2. The method for clock synchronization of a true wireless headset according to claim 1, wherein the time not being at the exact center of the synchronization window comprises the following two cases: the time is forward of the exact center of the synchronization window; the time is behind the exact center of the synchronization window;
when the time is not at the exact center of the synchronization window, dynamically adjusting the clock of the master ear includes the following two cases:
when the time is in front of the right center of the synchronous window, performing forward compensation on the clock of the main ear to accelerate the clock of the main ear;
when the time is behind the exact center of the synchronization window, then the clock of the master ear is compensated in reverse to slow down the clock of the master ear.
3. The method of claim 1, wherein dynamically adjusting the clock of the primary ear when the time is not at the exact center of the synchronization window comprises: calculating a deviation between the time and a midpoint of the synchronization window to dynamically adjust a clock of the master ear based on the deviation.
4. The method of claim 1, wherein dynamically adjusting the clock of the primary ear comprises: and adjusting the adjustable matching capacitor on the chip in the main ear.
5. The clock synchronization method for the true wireless earphone according to claim 4, wherein the adjustable matching capacitor realizes the adjustment of the capacitance value by controlling a switch.
6. The clock synchronization method for a true wireless headset according to claim 1, further comprising: when the time is at the very center of the synchronization window, there is no need to adjust the clock of the master ear.
7. A clock synchronization system for a true wireless headset, the true wireless headset comprising a primary ear and a secondary ear, the primary ear being connected to the secondary ear, comprising: the device comprises a connecting module, a judging module and an adjusting module;
the connection module is used for establishing connection between the main ear and the intelligent terminal and opening a synchronization window of the main ear when the main ear receives data sent by the intelligent terminal;
the judging module is used for judging whether the time when the main ear receives the synchronous words sent by the intelligent terminal is in the center of the synchronous window;
the adjusting module is used for dynamically adjusting the clock of the main ear when the time is not in the positive center of the synchronization window so as to keep the clock synchronization of the main ear and the intelligent terminal.
8. A storage medium having stored thereon a computer program, characterized in that the computer program, when being executed by a processor, implements the method of clock synchronization of a true wireless headset according to any of the claims 1 to 6.
9. A true wireless headset, comprising: a processor and a memory;
the memory is used for storing a computer program;
the processor is configured to execute the computer program stored in the memory to cause the true wireless headset to perform the clock synchronization method of the true wireless headset of any one of claims 1 to 6.
10. A clock synchronization system of a true wireless headset, comprising the true wireless headset of claim 9 and a smart terminal;
the intelligent terminal is used for sending data to the main ear of the true wireless earphone; the data includes a sync word.
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| CN202010778329.6A CN111817812A (en) | 2020-08-05 | 2020-08-05 | Clock synchronization method, system and medium of true wireless earphone and true wireless earphone |
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| CN202010778329.6A CN111817812A (en) | 2020-08-05 | 2020-08-05 | Clock synchronization method, system and medium of true wireless earphone and true wireless earphone |
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| CN103813437A (en) * | 2012-11-07 | 2014-05-21 | 北京信威通信技术股份有限公司 | Mobile wireless ad hoc network clock synchronization method based on time domain narrow pulse |
| US10200803B1 (en) * | 2018-01-23 | 2019-02-05 | Bestechnic (Shanghai) Co., Ltd. | Synchronization of wireless headphones |
| CN110109643A (en) * | 2019-03-14 | 2019-08-09 | 恒玄科技（上海）有限公司 | A kind of the usb audio terminal system on chip and synchronous clock calibrating method of no crystal oscillator |
| CN110213691A (en) * | 2019-06-26 | 2019-09-06 | 上海富芮坤微电子有限公司 | A kind of synchronization mechanism of TWS audio transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103813437A (en) * | 2012-11-07 | 2014-05-21 | 北京信威通信技术股份有限公司 | Mobile wireless ad hoc network clock synchronization method based on time domain narrow pulse |
| US10200803B1 (en) * | 2018-01-23 | 2019-02-05 | Bestechnic (Shanghai) Co., Ltd. | Synchronization of wireless headphones |
| CN110109643A (en) * | 2019-03-14 | 2019-08-09 | 恒玄科技（上海）有限公司 | A kind of the usb audio terminal system on chip and synchronous clock calibrating method of no crystal oscillator |
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