CN106454420B - A kind of clock synchronizing method and device - Google Patents
A kind of clock synchronizing method and device Download PDFInfo
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- CN106454420B CN106454420B CN201610882810.3A CN201610882810A CN106454420B CN 106454420 B CN106454420 B CN 106454420B CN 201610882810 A CN201610882810 A CN 201610882810A CN 106454420 B CN106454420 B CN 106454420B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The embodiment of the invention provides a kind of clock synchronizing method and devices；The embodiment of the present invention uses to playback equipment and sends media data packet, then, receive the synchronous testing result of clock that the playback equipment is sent, judge whether the synchronous testing result of the clock meets pre-determined synchronization condition, if, then to the playback equipment tranmitting data register synch command, synchronized so that the playback equipment carries out clock according to the clock synchronization command；The program, which can be improved, plays multimedia synchronism between multiple multimedia play equipments.
Description
Technical field
The present invention relates to audio play-back technology fields, and in particular to a kind of clock synchronizing method and device.
Background technique
With the improvement of living standards, home audio-visual devices play important role in people's lives.Currently, will
Multiple multimedia play equipments (for example, speaker, player etc.) and control equipment are interconnected by wired or wireless network,
A multimedia play system is formed, identical multimedia such as music is played simultaneously, has been widely used.
In above-mentioned multimedia play system, each multimedia play equipment has independent clock system.Each broadcasting
Equipment plays multimedia according to the clock system of its own.However, each multimedia play equipment and reference device are (general
To control equipment) clock system be not always synchronous.Each playback equipment and reference device each other there may be
The subtle time difference.When multiple multimedia play equipments play identical multimedia such as music, the above-mentioned subtle time difference causes respectively
The playback progress of a multimedia play equipment is inconsistent, thereby result in improve played between multimedia play equipment it is multimedia same
Step property is relatively low.
Summary of the invention
The embodiment of the present invention provides a kind of clock synchronizing method and device, can be improved and plays between multimedia play equipment
Multimedia synchronism.
The embodiment of the present invention provides a kind of clock synchronizing method, comprising:
Media data packet is sent to playback equipment；
Receive the synchronous testing result of clock that the playback equipment is sent；
Judge whether the synchronous testing result of the clock meets pre-determined synchronization condition；
If so, to the playback equipment tranmitting data register synch command, so that the playback equipment is according to the clock
It is synchronous that synch command carries out clock.
Correspondingly, the embodiment of the present invention also provides a kind of clock synchronization apparatus, comprising:
Data transmission unit, for sending media data packet to playback equipment；
Receiving unit, for receiving the synchronous testing result of clock that the playback equipment is sent；
Judging unit, for judging whether the synchronous testing result of the clock meets pre-determined synchronization condition；
Command sending unit, for when judging unit judges that the synchronous testing result of clock meets pre-determined synchronization condition, to
The playback equipment tranmitting data register synch command, so that the playback equipment is same according to clock synchronization command progress clock
Step.
Correspondingly, the embodiment of the invention also provides another clock synchronizing methods, comprising:
The media data packet that receiving control apparatus is sent, and obtain the received quantity of current media data packet；
The synchronous detection of clock is carried out when the received quantity is greater than preset threshold, obtains the synchronous testing result of clock；
The synchronous testing result of the clock is sent to the control equipment；
The clock synchronization command that the control equipment is sent according to the synchronous testing result of the clock is received, and according to described
It is synchronous that clock synchronization command carries out clock.
Correspondingly, the embodiment of the invention also provides another clock synchronization apparatus, comprising:
Receiving unit for the media data packet that receiving control apparatus is sent, and obtains the reception of current media data packet
Quantity；
It is same to obtain clock for carrying out the synchronous detection of clock when the received quantity is greater than preset threshold for detection unit
Walk testing result；
Transmission unit, for the synchronous testing result of the clock to be sent to the control equipment；
Synchronization unit, the synchronous life of clock sent for receiving the control equipment according to the synchronous testing result of the clock
It enables, and clock is carried out according to the clock synchronization command and is synchronized.
The embodiment of the present invention uses to playback equipment and sends media data packet, then, receives what the playback equipment was sent
Clock synchronizes testing result, judges whether the synchronous testing result of the clock meets pre-determined synchronization condition, if so, broadcasting to described
Equipment tranmitting data register synch command is put, is synchronized so that the playback equipment carries out clock according to the clock synchronization command.It should
Scheme can be during playback equipment plays media data packet, and triggering playback equipment carries out clock and synchronizes, and makes multiple broadcastings
Reach between equipment and effect is played simultaneously well, in terms of existing technologies, multiple multimedia play equipments can be improved
Between play the broadcasting response speed of multimedia synchronism and media data.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.It should be evident that drawings in the following description are only some embodiments of the invention, for
For those skilled in the art, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the flow diagram for the clock synchronizing method that the embodiment of the present invention one provides.
Fig. 2 is the flow diagram of clock synchronizing method provided by Embodiment 2 of the present invention.
Fig. 3 is the schematic diagram of a scenario for the multimedia play system that the embodiment of the present invention three provides.
Fig. 4 is the flow diagram for the clock synchronizing method that the embodiment of the present invention three provides.
Fig. 5 is the structural schematic diagram for the clock synchronization apparatus that the embodiment of the present invention four provides.
Fig. 6 is the structural schematic diagram for the clock synchronization apparatus that the embodiment of the present invention five provides.
Fig. 7 is the structural schematic diagram for the terminal that the embodiment of the present invention six provides.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those skilled in the art's every other implementation obtained without creative efforts
Example, shall fall within the protection scope of the present invention.
Description and claims of this specification and term " first " in above-mentioned attached drawing, " second ", " third " etc.
(if present) is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be appreciated that this
The object of sample description is interchangeable under appropriate circumstances.In addition, term " includes " and " having " and their any deformation, meaning
Figure, which is to cover, non-exclusive includes.For example, containing the process, method of series of steps or containing a series of modules or list
The device of member, terminal, system those of are not necessarily limited to be clearly listed step or module or unit, can also include unclear
The step of ground is listed or module or unit also may include its intrinsic for these process, methods, device, terminal or system
Its step or module or unit.
The embodiment of the present invention provides a kind of clock synchronizing method and device, will be described in detail respectively below.
Embodiment one
The present embodiment will be described from the angle of clock synchronization apparatus, which specifically can integrate at end
In the control such as end equipment, which can be smart phone, tablet computer etc..
A kind of clock synchronizing method, comprising: send media data packet to playback equipment, then, receive playback equipment hair
The synchronous testing result of the clock sent, judges whether the synchronous testing result of the clock meets pre-determined synchronization condition, if so, broadcasting to this
Equipment tranmitting data register synch command is put, is synchronized so that the playback equipment carries out clock according to the clock synchronization command.
As shown in Figure 1, the clock synchronizing method, detailed process may include:
101, media data packet is sent to playback equipment.
Specifically, then available media data to be played is packaged media data, obtains multiple media
Data packet.
Wherein, there are many modes for obtaining media data, for example, can be by network (such as wireless network) from server
Obtain media data for another example can obtain media data from local storage unit.The media data may include: audio
Data, audio, video data etc..The audio data includes but is not limited to CD, WAV, MP3 (Moving Picture Experts
Group Audio Layer III), the audio datas of the formats such as WMA (Windows Media Audio).
In the present embodiment, can according to certain unit (using size of data, media frame etc. as unit) to media data into
Row is packaged, to obtain multiple media data packets.For example, media data can be packaged into the equal media number of multiple size of data
According to the equal media data packet of packet or playing duration.For example, it is 100ms that the audio data can be packaged into audio length
Multiple data packets
Wherein, in order to make playback equipment that media data packet be played simultaneously, the media data packet include package identification,
The play time information and segment of media data of data packet.At this point, when being packaged to media data, it is also necessary to be media data packet
Package identification and play time information (such as timestamp) are set.The package identification is that each data packet distinguishes over other numbers
According to the unique identification of packet, can be used for marking position of the data packet in the audio data.For example, the package identification can be
Serial number or number of data packet etc..Media data packet is arranged in first media data packet being packaged out is identified as 1,
Media data packet is arranged in second media data packet being packaged out is identified as 2, etc..
In the present embodiment, multiple media data packet can be successively sent to playback equipment.In practical application, Ke Yitong
Wired mode transmission is crossed, can also be sent by wireless modes such as WiFi (Wireless Fidelity, Wireless Fidelity), bluetooths.
102, the synchronous testing result of clock of playback equipment transmission is received.
Wherein, the synchronous testing result of clock may include: and be used to indicate the system time of playback equipment to be with reference clock
The instruction information of no synchronization e.g. may include: the first synchronous instruction information of instruction, indicate nonsynchronous second indication information.
The reference clock can be the system clock of control equipment, or the system clock of other playback equipments, tool
Body, reference clock can be selected according to actual needs.
In order to save the resource of playback equipment, judgement can be synchronized in control equipment side, be carried out in playback equipment side
Synchronous difference obtains；Namely the synchronous testing result of clock may include: between the system clock of playback equipment and reference clock
Synchronous difference.
103, judge whether the synchronous testing result of the clock meets pre-determined synchronization condition, if so, 104 are thened follow the steps, if
It is no, execute step 105.
Wherein, pre-determined synchronization condition can there are many, can be set according to the synchronous testing result of clock, for example,
The synchronous testing result of clock may include: to be used to indicate the system time instruction whether synchronous with reference clock of playback equipment to believe
When breath, which may include: to indicate that information is the system time and the nonsynchronous finger of reference clock of playback equipment
Show information；Namely when playback equipment detects that own system clock is asynchronous with reference clock can to carry out clock synchronous；
For another example, in the synchronization discrepancy that the synchronous testing result of clock includes between the system clock of playback equipment and reference clock
Value；The pre-determined synchronization condition may include: synchronization discrepancy not less than preset difference value；Step " judges the synchronous detection knot of the clock at this time
Whether fruit meets presynchronization condition " may include:
When the synchronization difference is less than preset difference value, determine that the synchronous testing result of the clock is unsatisfactory for presynchronization condition；
When the synchronization difference is not less than preset difference value, determine that the synchronous testing result of the clock meets presynchronization condition.
That is, it is smaller in synchronous difference, when not influencing that quality is played simultaneously, it is believed that the system clock and ginseng of playback equipment
Clock near-synchronous is examined, at this time without carrying out clock synchronous adjustment；If otherwise synchronous difference is larger, influences that quality is played simultaneously
When, it is believed that the system clock of playback equipment is asynchronous with reference clock, needs to carry out clock synchronous adjustment at this time.
104, to the playback equipment tranmitting data register synch command so that the playback equipment according to the clock synchronization command into
Row clock is synchronous.
For example, including: that be used to indicate playback equipment system clock asynchronous with reference clock in the synchronous testing result of clock
Instruction information or the synchronous testing result of clock in synchronous difference when being not less than preset difference value, at this point it is possible to playback equipment
Tranmitting data register synch command, the playback equipment clock synchronization command carry out clock synchronization operation.
To save bandwidth, the present embodiment can stop when judging that the synchronous testing result of clock meets pre-determined synchronization condition
Media data packet is sent to playback equipment, i.e. step " to the playback equipment tranmitting data register synch command " may include:
Stop sending media data packet to the playback equipment, and to the playback equipment tranmitting data register synch command.
105, continue to send media data packet to the playback equipment.
When the synchronous testing result of clock is unsatisfactory for pre-determined synchronization condition, when showing system clock and the reference of playback equipment
Clock is synchronous, at this point it is possible to continue to send media data packet to playback equipment, to play media data packet.
Optionally, to after the playback equipment tranmitting data register synch command, the present embodiment clock synchronizing method can be with
Include:
Receive the instruction information for being used to indicate clock and having synchronized of playback equipment return；
Continued to send media data packet to the playback equipment according to the instruction information.
For example, can send after playback equipment progress clock is synchronous and synchronously complete instruction information to equipment is controlled, control
Control equipment, which synchronously completes instruction information according to this, to be continued to send media data packet to playback equipment.
In order to enable playback equipment is restored to after carrying out clock and synchronizing and synchronizes broadcasting with other playback equipments,
The present embodiment method currently can need to be sent to the mark of the media data packet of other playback equipments according to instruction acquisition of information；
Then, continued to send corresponding media data packet to playback equipment according to the mark.
For example, equipment is controlled in the instruction information that the clock for receiving playback equipment a transmission has synchronized, according to the instruction
Acquisition of information currently needs to be sent to the number (such as data packet 10) of the media data packet of playback equipment b, at this point, control equipment can
To continue to send media data packet to playback equipment since data packet 10.
From the foregoing, it will be observed that then the embodiment of the present invention, which is used to playback equipment transmission media data packet, receives the playback equipment
The synchronous testing result of the clock of transmission, judges whether the synchronous testing result of the clock meets pre-determined synchronization condition, if so, to this
Playback equipment tranmitting data register synch command synchronizes so that the playback equipment carries out clock according to the clock synchronization command.The party
Case can be during playback equipment plays media data packet, and triggering playback equipment carries out clock and synchronizes, and sets multiple broadcastings
Reach between standby and effect be played simultaneously well, in terms of existing technologies, can be improved multiple multimedia play equipments it
Between play multimedia synchronism.
In addition, the embodiment of the present invention sends media data to playback equipment first, clock is then carried out again and is synchronized, is not necessarily to
It synchronizes and retransmits media data and play out after operation, broadcasting response speed can be promoted；Especially for playback equipment
In the case where having broadcasting and synchronous coordination to operate before, output can be played immediately, promote media play speed.
Embodiment two
The present embodiment will be described from the angle of another clock synchronization apparatus, which can specifically collect
At in the playback equipments such as terminal, speaker, which can be smart phone, tablet computer etc..
A kind of clock synchronizing method, comprising: the media data packet that receiving control apparatus is sent, and obtain current media data
The received quantity of packet carries out the synchronous detection of clock when the received quantity is greater than preset threshold, obtains the synchronous testing result of clock,
The synchronous testing result of the clock is sent to the control equipment, the control equipment is received and is sent according to the synchronous testing result of the clock
Clock synchronization command, and it is synchronous according to the clock synchronization command to carry out clock.
As shown in Fig. 2, the clock synchronizing method, detailed process can be such that
201, the media data packet that receiving control apparatus is sent, and obtain the received quantity of current media data packet.
Specifically, the media data packet that receiving control apparatus is sent, then, buffered media data packet and to the matchmaker received
Volume data packet is counted, and can obtain the received quantity of current media data packet according to count results at this time.
202, the synchronous detection of clock is carried out when the received quantity is greater than preset threshold, obtains the synchronous testing result of clock.
For example, wherein preset threshold can be set according to actual needs, for example, can be set to 5,6 etc..
Whether can for detection system clock with reference clock synchronous, this is constantly if the synchronous detection of clock is carried out in the present embodiment
Clock testing result includes: to be used to indicate the system clock instruction information whether synchronous with reference clock；Namely step " carries out clock
Synchronous detection " may include: whether detection system clock is consistent or synchronous with reference clock.
Clock is carried out in the present embodiment synchronizes the synchronization discrepancy that detect can also between detection system clock and reference clock
Value, i.e. clock difference；Clock synchronized result includes the synchronous difference between system clock and reference clock at this time；Namely step
" carrying out the synchronous detection of clock " may include:
Obtain reference clock and current system clock；
Detect the synchronous difference between the system clock and the reference clock.
Wherein, reference clock can be the system clock of reference device, which can be according to actual needs from control
It is selected in control equipment and playback equipment；For example, can choose control equipment is reference device, can be obtained at this time from control equipment
Reference clock.
The system clock can be the system clock of clock synchronization apparatus oneself, when the clock synchronization apparatus is integrated in broadcasting
When equipment, which is the system clock of playback equipment.
Wherein, the synchronous difference between the system clock and the reference clock can be between system clock and reference clock
Time difference, or the absolute value for the time difference.
203, the synchronous testing result of the clock is sent to the control equipment.
204, the clock synchronization command that the control equipment is sent according to the synchronous testing result of the clock is received, and when according to this
It is synchronous that clock synch command carries out clock.
For example, after receiving clock synchronization command synchronous difference can be obtained according to clock synchronization command, according to same
System clock is adjusted in step difference, so that system clock is synchronous with reference clock；It specifically, can be true according to synchronous difference
Surely then the adjusting direction being adjusted in synchronism and regulated quantity are adjusted system clock according to regulative mode and regulated quantity, so that
It is synchronous with reference clock.
The synchronization difference obtained in the present embodiment according to clock synchronization command, it is same to carry out clock for step 202 before can be
The synchronization difference that step detection obtains；It is also possible to carry out the synchronous detection of clock, obtained synchronization again according to clock synchronization command
The accuracy of clock synchronous adjustment can be improved in difference at this time.
Optionally, after the synchronous testing result of the clock is sent to the control equipment, if receiving control equipment hair
The media data packet sent will then reset the counting of data packet, if for example, receiving what control equipment was sent within a preset time
Media data packet will then reset the counting of data packet.
From the foregoing, it will be observed that the media data packet that receiving control apparatus of the embodiment of the present invention is sent, and obtain current media data
The received quantity of packet carries out the synchronous detection of clock when the received quantity is greater than preset threshold, obtains the synchronous testing result of clock,
The synchronous testing result of the clock is sent to the control equipment, the control equipment is received and is sent according to the synchronous testing result of the clock
Clock synchronization command, and it is synchronous according to the clock synchronization command to carry out clock.The program can play media data packet
It is synchronous to carry out clock in the process, makes to reach between multiple playback equipments effect is played simultaneously well, compared with the existing technology and
The broadcasting response speed that multimedia synchronism and media data are played between multiple multimedia play equipments can be improved in speech
Degree.
Embodiment three
According to clock synchronizing method described in embodiment one and two, citing is described in further detail below.
In the present embodiment, main control device, embodiment two will be integrated in clock synchronization apparatus described in embodiment one
Described clock synchronization apparatus is described in detail for being integrated in slave.
With reference to Fig. 3, a kind of multimedia play system is present embodiments provided, comprising: source device 10, main control device 20, extremely
A few slave 30；The source device 10, main control device 20 can be connected with each other between slave 30 by network.
Wherein, main control device 20 can be terminal, such as mobile phone, tablet computer, the master control for controlling slave
Equipment may be playback equipment, for example, the playback equipments such as speaker；The present embodiment will be carried out so that main control device 20 is terminal as an example
Explanation.
The slave 30 can be the playback equipment for being controlled by main control device, which can play for speaker etc.
Equipment.
Wherein, source device 10, can be with network equipments such as servers for providing multi-medium data to be played.
Clock synchronizing method provided by the invention will be introduced based on above-mentioned multimedia play system below.
As shown in figure 4, the clock synchronizing method, detailed process can be such that
301, source device 10 sends multi-medium data to main control device 20.
For example, source device 10 receive main control device send data acquisition request, then, according to the data acquisition request to
Main control device 20 sends the multi-medium data of response.
Wherein, which can be audio data, audio, video data etc..
In other embodiments, main control device 20 can be from being locally stored middle acquisition multi-medium data.
302, main control device 20 is packaged multi-medium data, obtains multiple media data packets.
Main control device 20 can carry out media data according to certain unit (using size of data, media frame etc. as unit)
It is packaged, to obtain multiple media data packets.For example, media data can be packaged into the equal media data of multiple size of data
Packet or the equal media data packet of playing duration.For example, it is 200ms's that the audio data can be packaged into audio length
Multiple data packets.
Wherein, media data packet may include: package identification, data packet play time information (such as timestamp) and
Segment of media data.
303, main control device 20 sends media data packet to each slave 30.
Main control device 20 can send media data packet to each slave 30 according to the mark of media data packet；Than
Such as, media data packet is successively sent to slave 30 according to the number of data packet.
304, it 30 buffered media data packet of slave and counts.
305, slave 30 judges whether current count value is greater than preset threshold, if so, step 306 is executed, if it is not, then
Return to step 305.
The preset threshold can be set according to actual needs, for example can be 7,8,9 etc..
306, slave 30 detects the synchronous difference between own system clock and the system clock of main control device 20, and
The synchronization difference is sent to main control device 20.
For example, slave 30 can request the system clock of main control device 20 (when also referred to as referring to main control device 20
Clock), then, the system clock of itself is compared by slave 30 with the reference clock, is obtained between 2 two clocks
Time error, i.e., synchronous difference.
307, main control device 20 judges whether the synchronization difference is less than preset difference value, if it is not, step 308 is executed, if so,
Execute step 310.
For example, synchronous difference is 2ms, if preset difference value is that it is default poor to may determine that the synchronization difference is greater than at this time for 1ms
Value it is synchronous to need to carry out clock, therefore execute step 308 at this point, clocking error is larger.
For another example, synchronous difference is 0.5ms, if preset difference value is that it is pre- to may determine that the synchronization difference is less than at this time for 1ms
If difference, at this point, clocking error is smaller, it can be synchronous without clock, therefore, it can go to and execute step 310 pair counting clearing,
Wait synchronous detection next time.
308, main control device 20 stops sending media data packet to the slave 30, and to when the slave 30 transmission
Clock synch command.
309, slave 30 is adjusted synchronously according to system clock of the clock synchronization command to its own, so that
The system clock of itself is synchronous with the system clock of main control device.
Specifically, slave 30 can obtain synchronous difference according to clock synchronization command, then, according to synchronous difference pair
The system clock of itself is adjusted.
Optionally, after being adjusted in synchronism completion, the synchronous difference between system clock and reference clock can be sent
To main control device 20, step 307 is then gone to.
310, main control device 20 continues to send media data packet to slave 30, and slave 30 will count clearly
Zero, go to step 304.
When it is implemented, the present invention is not limited by the execution sequence of described each step, conflict is not being generated
In the case of, certain steps can also be carried out using other sequences or be carried out simultaneously.
From the foregoing, it will be observed that the embodiment of the present invention sends media data packet to slave 30 using main control device 20, it is then, main
It controls equipment 20 and receives the synchronous testing result of clock that the slave 30 is sent, judge whether the synchronous testing result of the clock meets
Pre-determined synchronization condition, if so, to the playback equipment tranmitting data register synch command, so that the slave 30 is according to the clock
It is synchronous that synch command carries out clock.The program can be during slave 30 plays media data packet, by main control device
It is synchronous that 20 triggering slaves 30 carry out clocks, makes to reach between multiple slaves 30 effect is played simultaneously well, relatively
For the prior art, it can be improved and play multimedia synchronism between multiple multimedia play equipments.
In addition, the embodiment of the present invention sends media data from main control device 20 to slave 30 first, then carry out again
Clock is synchronous, plays out without retransmiting media data after synchronizing operation, can promote broadcasting response speed；Especially
It was for having broadcasting and synchronous coordination operation before playback equipment in the case that, output can be played immediately, promotes media
Broadcasting speed.
Example IV
In order to better implement above method, the embodiment of the present invention also provides a kind of clock synchronization apparatus, as shown in figure 5,
The clock synchronization apparatus 40 includes: data transmission unit 401, receiving unit 402, judging unit 403 and command sending unit
404, as follows:
Data transmission unit 401, for sending media data packet to playback equipment；
Receiving unit 402, the synchronous testing result of clock for receiving playback equipment transmission；
Judging unit 403, for judging whether the synchronous testing result of the clock meets pre-determined synchronization condition；
Command sending unit 404, for judging that the synchronous testing result of clock meets pre-determined synchronization condition in judging unit 403
When, to the playback equipment tranmitting data register synch command, so that the playback equipment is same according to clock synchronization command progress clock
Step.
Wherein, testing result may include a variety of, for example, may include playback equipment system clock and reference clock it
Between synchronization difference；
At this point, the judging unit 403, can be specifically used for:
Judge whether the synchronous testing result of the clock meets presynchronization condition, comprising:
When the synchronization difference is less than preset difference value, determine that the synchronous testing result of the clock is unsatisfactory for presynchronization condition；
When the synchronization difference is not less than preset difference value, determine that the synchronous testing result of the clock meets presynchronization condition.
For example, the command sending unit 404, can be specifically used for: controlling the data transmission unit 401 and stop setting to the broadcasting
Preparation send media data packet, and to playback equipment tranmitting data register synch command
Optionally, the present embodiment clock synchronization apparatus can also include:
Information receiving unit, for receiving the instruction information for being used to indicate clock and having synchronized of playback equipment return；
Control unit is sent, for continuing to send out to the playback equipment according to the instruction information control data transmission unit 401
Send media data packet.
When it is implemented, above each unit can be used as independent entity to realize, any combination can also be carried out, is made
It is realized for same or several entities, the specific implementation of above each unit can be found in the embodiment of the method for front, herein not
It repeats again.
The clock synchronization apparatus 40 can integrate in the terminal, which can be with mobile phone, tablet computer etc..
From the foregoing, it will be observed that the embodiment of the present invention sends media data packet to playback equipment using data transmission unit 401, so
Afterwards, the synchronous testing result of clock which sends is received by receiving unit 402, which is judged by judging unit 403
Whether synchronous testing result meets pre-determined synchronization condition, if so, from command sending unit 404 to the playback equipment tranmitting data register
Synch command synchronizes so that the playback equipment carries out clock according to the clock synchronization command.The program can be in playback equipment
During playing media data packet, triggering playback equipment carries out clock and synchronizes, and makes to reach good between multiple playback equipments
Effect is played simultaneously, in terms of existing technologies, can be improved played between multiple multimedia play equipments it is multimedia same
Step property.
In addition, the embodiment of the present invention sends media data to playback equipment first, clock is then carried out again and is synchronized, is not necessarily to
It synchronizes and retransmits media data and play out after operation, broadcasting response speed can be promoted；Especially for playback equipment
In the case where having broadcasting and synchronous coordination to operate before, output can be played immediately, promote media play speed.
Embodiment five
In order to better implement above method, the embodiment of the present invention also provides another clock synchronization apparatus, such as Fig. 6 institute
Show, which includes: receiving unit 501, detection unit 502, transmission unit 503 and synchronization unit 504, such as
Under:
Receiving unit 501 for the media data packet that receiving control apparatus is sent, and obtains connecing for current media data packet
Receive quantity；
It is same to obtain clock for carrying out the synchronous detection of clock when the received quantity is greater than preset threshold for detection unit 502
Walk testing result；
Transmission unit 503, for the synchronous testing result of the clock to be sent to the control equipment；
Synchronization unit 504, the synchronous life of clock sent for receiving the control equipment according to the synchronous testing result of the clock
It enables, and clock is carried out according to the clock synchronization command and is synchronized.
Wherein, detection unit 502 can be specifically used for: when the received quantity is greater than preset threshold, obtain reference clock
And current system clock；Detect the synchronous difference between the system clock and the reference clock.
When it is implemented, above each unit can be used as independent entity to realize, any combination can also be carried out, is made
It is realized for same or several entities, the specific implementation of above each unit can be found in the embodiment of the method for front, herein not
It repeats again.
Wherein, which can integrate in playback equipment, for example smart phone, plate, speaker etc. play
In equipment.
From the foregoing, it will be observed that the media data packet that the embodiment of the present invention uses 501 receiving control apparatus of receiving unit to send, and obtain
The received quantity of current media data packet is taken, then, when being carried out by detection unit 502 when the received quantity is greater than preset threshold
The synchronous detection of clock obtains the synchronous testing result of clock, and the synchronous testing result of the clock is sent to the control by transmission unit 503
Equipment receives the clock synchronization command that the control equipment is sent according to the synchronous testing result of the clock, and root by synchronization unit 504
It is synchronous that clock is carried out according to the clock synchronization command.The program can carry out clock during playing media data packet and synchronize,
Make to reach between multiple playback equipments and effect is played simultaneously well, in terms of existing technologies, multiple more matchmakers can be improved
The broadcasting response speed of multimedia synchronism and media data is played between body playback equipment.
Embodiment six
The embodiment of the present invention also provides a kind of terminal, as shown in fig. 7, the terminal 600 may include radio frequency (RF, Radio
Frequency) circuit 601, include one or more memory 602, the input unit of computer readable storage medium
603, display unit 604, sensor 605, voicefrequency circuit 606, Wireless Fidelity (WiFi, Wireless Fidelity) module
607, the components such as processor 608 and the power supply 609 of processing core are included one or more than one.Those skilled in the art
Member it is appreciated that terminal structure not structure paired terminal shown in Fig. 7 restriction, may include more more or fewer than illustrating
Component perhaps combines certain components or different component layouts.
Radio circuit 601 can be used for receiving and sending messages or communication process in signal send and receive, particularly, by base station
Downlink information receive after, transfer to one or more than one processor 608 processing；In addition, the data for being related to uplink are sent
To base station.In general, radio circuit 601 includes but is not limited to antenna, at least one amplifier, tuner, one or more oscillations
Device, subscriber identity module (SIM, Subscriber Identity Module) card, transceiver, coupler, low noise amplification
Device (LNA, Low Noise Amplifier), duplexer etc..In addition, radio circuit 601 can also by wireless communication with network
It is communicated with other equipment.Any communication standard or agreement, including but not limited to global system for mobile telecommunications can be used in the wireless communication
System (GSM, Global System of Mobile communication), general packet radio service (GPRS, General
Packet Radio Service), CDMA (CDMA, Code Division Multiple Access), wideband code division it is more
Location (WCDMA, Wideband Code Division Multiple Access), long term evolution (LTE, Long Term
Evolution), Email, short message service (SMS, Short Messaging Service) etc..
Memory 602 can be used for storing application program and data.It include that can hold in the application program that memory 602 stores
Line program code.Application program can form various functional modules.Processor 608 is stored in answering for memory 602 by operation
With program, thereby executing various function application and data processing.Memory 602 can mainly include storing program area and storage number
According to area, wherein storing program area can application program needed for storage program area, at least one function (for example sound plays function
Energy, image player function etc.) etc.；Storage data area can store according to terminal use created data (such as audio data,
Phone directory etc.) etc..In addition, memory 602 may include high-speed random access memory, it can also include non-volatile memories
Device, for example, at least a disk memory, flush memory device or other volatile solid-state parts.Correspondingly, memory
602 can also include Memory Controller, to provide the access of processor 608 and input unit 603 to memory 602.
Input unit 603 can be used for receiving number, character information or the user's characteristic information (such as fingerprint) of input, and
Generate keyboard related with user setting and function control, mouse, operating stick, optics or trackball signal input.Specifically
Ground, input unit 603 may include fingerprint recognition mould group.In some embodiments, input unit 603 can also include touch-sensitive table
Face.Touch sensitive surface, also referred to as touch display screen or Trackpad, collect user on it or nearby touch operation (such as
User uses the operations of any suitable object or attachment on touch sensitive surface or near touch sensitive surface such as finger, stylus), and
Corresponding attachment device is driven according to preset formula.Optionally, touch sensitive surface may include touch detecting apparatus and touch
Two parts of controller.Wherein, the touch orientation of touch detecting apparatus detection user, and touch operation bring signal is detected,
Transmit a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and is converted into touching
Point coordinate, then gives processor 608, and can receive order that processor 608 is sent and be executed.Furthermore, it is possible to using electricity
The multiple types such as resistive, condenser type, infrared ray and surface acoustic wave realize touch sensitive surface.In addition to touch sensitive surface, input unit 603
It can also include other input equipments.Specifically, other input equipments can include but is not limited to physical keyboard, function key (ratio
Such as volume control button, switch key), trace ball, mouse, one of operating stick etc. or a variety of.
Display unit 604 can be used for showing information input by user or be supplied to user information and terminal it is various
Graphical user interface, these graphical user interface can be made of figure, text, icon, video and any combination thereof.Display
Unit 604 may include display panel.Optionally, can using liquid crystal display (LCD, Liquid Crystal Display),
The forms such as Organic Light Emitting Diode (OLED, Organic Light-Emitting Diode) configure display panel.Further
, touch sensitive surface can cover display panel, after touch sensitive surface detects touch operation on it or nearby, send processing to
Device 608 is followed by subsequent processing device 608 and is provided on a display panel accordingly according to the type of touch event to determine the type of touch event
Visual output.Although touch sensitive surface and display panel are to realize input and input as two independent components in Fig. 7
Function, but in some embodiments it is possible to touch sensitive surface and display panel are integrated and realizes and outputs and inputs function.
Terminal may also include at least one sensor 605, such as optical sensor, motion sensor and other sensors.
Specifically, optical sensor may include ambient light sensor and proximity sensor, wherein ambient light sensor can be according to ambient light
Light and shade adjust the brightness of display panel, proximity sensor can close display panel and/or back when terminal is moved in one's ear
Light.As a kind of motion sensor, gravity accelerometer can detect (generally three axis) acceleration in all directions
Size can detect that size and the direction of gravity when static, can be used to identify mobile phone posture application (such as horizontal/vertical screen switching,
Dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, tap) etc.；It can also configure as terminal
The other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, details are not described herein.
Voicefrequency circuit 606 can provide the audio interface between user and terminal by loudspeaker, microphone.Voicefrequency circuit
The audio data received can be converted into electric signal by 606, be transferred to loudspeaker, be converted to voice signal output by loudspeaker；
On the other hand, the voice signal of collection is converted to electric signal by microphone, is converted to audio number after being received by voicefrequency circuit 606
According to then such as another terminal will be sent to through radio circuit 601 after audio data output processor 608 handles, or by sound
Frequency is further processed according to output to memory 602.Voicefrequency circuit 606 is also possible that earphone jack, to provide peripheral hardware
The communication of earphone and terminal.
Wireless Fidelity (WiFi) belongs to short range wireless transmission technology, and terminal can be helped by wireless fidelity module 607
User sends and receive e-mail, browses webpage and access streaming video etc., it provides wireless broadband internet access for user.
Although Fig. 7 shows wireless fidelity module 607, but it is understood that, and it is not belonging to must be configured into for terminal, completely may be used
To omit within the scope of not changing the essence of the invention as needed.
Processor 608 is the control centre of terminal, using the various pieces of various interfaces and the entire terminal of connection, is led to
It crosses operation or executes the application program being stored in memory 602, and call the data being stored in memory 602, execute
The various functions and processing data of terminal, to carry out integral monitoring to terminal.Optionally, processor 608 may include one or
Multiple processing cores；Preferably, processor 608 can integrate application processor and modem processor, wherein application processor
Main processing operation system, user interface and application program etc., modem processor mainly handles wireless communication.It is understood that
, above-mentioned modem processor can not also be integrated into processor 608.
Terminal further includes the power supply 609 (such as battery) powered to all parts.Preferably, power supply can pass through power supply pipe
Reason system and processor 608 are logically contiguous, to realize management charging, electric discharge and power managed by power-supply management system
Etc. functions.Power supply 609 can also include one or more direct current or AC power source, recharging system, power failure inspection
The random components such as slowdown monitoring circuit, power adapter or inverter, power supply status indicator.
Although being not shown in Fig. 7, terminal can also include camera, bluetooth module etc., and details are not described herein.
Specifically in the present embodiment, the processor 608 in terminal can be according to following instruction, will be one or more
The corresponding executable program code of the process of application program is loaded into memory 602, and is stored in by processor 608 to run
Application program in memory 602, to realize various functions:
Media data packet is sent to playback equipment, then, receives the synchronous testing result of clock that the playback equipment is sent,
Judge whether the synchronous testing result of the clock meets pre-determined synchronization condition, if so, same to the playback equipment tranmitting data register
Step command synchronizes so that the playback equipment carries out clock according to the clock synchronization command.
Preferably, the synchronous testing result of the clock includes: same between the system clock of playback equipment and reference clock
Walk difference；
Judge whether the synchronous testing result of the clock meets presynchronization condition, comprising:
When the synchronous difference is less than preset difference value, determine that the synchronous testing result of the clock is unsatisfactory for presynchronization item
Part；
When the synchronous difference is not less than preset difference value, determine that the synchronous testing result of the clock meets presynchronization item
Part.
It is preferably, described to the playback equipment tranmitting data register synch command, comprising:
Stop sending media data packet to the playback equipment, and to the playback equipment tranmitting data register synch command.
Preferably, processor 608 also implements function such as:
To after the playback equipment tranmitting data register synch command, receiving that the playback equipment returns when being used to indicate
The instruction information that clock has synchronized；Continued to send media data packet to the playback equipment according to the instruction information.
Aforesaid operations are for details, reference can be made to the embodiment of the method for front, and details are not described herein.
From the foregoing, it will be observed that the terminal sends media data packet to playback equipment, so the embodiment of the invention provides a kind of terminal
Afterwards, the synchronous testing result of clock that the playback equipment is sent is received, it is pre- to judge whether the synchronous testing result of the clock meets
If synchronous condition, if so, to the playback equipment tranmitting data register synch command so that the playback equipment according to it is described when
It is synchronous that clock synch command carries out clock.The program can be during playback equipment plays media data packet, and triggering is played and set
The standby clock that carries out is synchronous, makes to reach between multiple playback equipments effect is played simultaneously well, in terms of existing technologies, can
To improve the broadcasting response speed for playing multimedia synchronism and media data between multiple multimedia play equipments.
It should be noted that those of ordinary skill in the art will appreciate that whole in the various methods of above-described embodiment or
Part steps are relevant hardware can be instructed to complete by program, which can store in computer-readable storage medium
In matter, storage medium may include: read-only memory (ROM, Read Only Memory), random access memory (RAM,
Random Access Memory), disk or CD etc..
It is provided for the embodiments of the invention a kind of clock synchronizing method above and device is described in detail, herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand method and its core concept of the invention；Meanwhile for those skilled in the art, according to the thought of the present invention, having
There will be changes in body embodiment and application range, in conclusion the content of the present specification should not be construed as to the present invention
Limitation.
Claims (10)
1. a kind of clock synchronizing method characterized by comprising
Media data to be played is obtained, and the media data is packaged, obtains multiple media data packets；
The media data packet is sent to playback equipment；
Receive the synchronous testing result of clock that the playback equipment is sent；
Judge whether the synchronous testing result of the clock meets pre-determined synchronization condition；
If so, to the playback equipment tranmitting data register synch command, so that the playback equipment is synchronous according to the clock
It is synchronous that order carries out clock.
2. clock synchronizing method as described in claim 1, which is characterized in that the synchronous testing result of the clock includes: to play
Synchronous difference between the system clock of equipment and reference clock；
Judge whether the synchronous testing result of the clock meets presynchronization condition, comprising:
When the synchronous difference is less than preset difference value, determine that the synchronous testing result of the clock is unsatisfactory for presynchronization condition；
When the synchronous difference is not less than preset difference value, determine that the synchronous testing result of the clock meets presynchronization condition.
3. clock synchronizing method as described in claim 1, which is characterized in that described synchronous to the playback equipment tranmitting data register
Order, comprising:
Stop sending media data packet to the playback equipment, and to the playback equipment tranmitting data register synch command.
4. clock synchronizing method as claimed in claim 3, which is characterized in that ordered to the playback equipment tranmitting data register is synchronous
After order, the clock synchronizing method further include:
Receive the instruction information for being used to indicate clock and having synchronized that the playback equipment returns；
Continued to send media data packet to the playback equipment according to the instruction information.
5. a kind of clock synchronizing method characterized by comprising
The media data packet that receiving control apparatus is sent, and obtain the received quantity of current media data packet；
When the received quantity is greater than preset threshold, reference clock and current system clock are obtained；
The synchronous difference between the system clock and the reference clock is detected, the synchronous testing result of clock is obtained；
The synchronous testing result of the clock is sent to the control equipment；
The clock synchronization command that the control equipment is sent according to the synchronous testing result of the clock is received, and according to the clock
It is synchronous that synch command carries out clock.
6. a kind of clock synchronization apparatus characterized by comprising
Data transmission unit is packaged for obtaining media data to be played, and to the media data, obtains multiple matchmakers
Volume data packet；The media data packet is sent to playback equipment；
Receiving unit, for receiving the synchronous testing result of clock that the playback equipment is sent；
Judging unit, for judging whether the synchronous testing result of the clock meets pre-determined synchronization condition；
Command sending unit, for when judging unit judges that the synchronous testing result of clock meets pre-determined synchronization condition, Xiang Suoshu
Playback equipment tranmitting data register synch command synchronizes so that the playback equipment carries out clock according to the clock synchronization command.
7. clock synchronization apparatus as claimed in claim 6, which is characterized in that the synchronous testing result of the clock includes: to play
Synchronous difference between the system clock of equipment and reference clock；
The judging unit, is specifically used for:
Judge whether the synchronous testing result of the clock meets presynchronization condition, comprising:
When the synchronous difference is less than preset difference value, determine that the synchronous testing result of the clock is unsatisfactory for presynchronization condition；
When the synchronous difference is not less than preset difference value, determine that the synchronous testing result of the clock meets presynchronization condition.
8. clock synchronization apparatus as claimed in claim 6, which is characterized in that the command sending unit is specifically used for:
It controls the data transmission unit to stop sending media data packet to the playback equipment, and is sent to the playback equipment
Clock synchronization command.
9. a kind of clock synchronization apparatus characterized by comprising
Receiving unit for the media data packet that receiving control apparatus is sent, and obtains the received quantity of current media data packet；
Detection unit, for obtaining reference clock and current system clock when the received quantity is greater than preset threshold；
The synchronous difference between the system clock and the reference clock is detected, the synchronous testing result of clock is obtained；
Transmission unit, for the synchronous testing result of the clock to be sent to the control equipment；
Synchronization unit, the clock synchronization command sent for receiving the control equipment according to the synchronous testing result of the clock,
And clock is carried out according to the clock synchronization command and is synchronized.
10. a kind of computer readable storage medium is stored with the computer program synchronous for clock, wherein the calculating
Machine program makes computer execute the method as described in claim 1 or claim 5.
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| CN112787742B (en) * | 2021-03-16 | 2022-11-22 | 芯原微电子（成都）有限公司 | Clock synchronization method and device, wireless earphone and readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514925A (en) * | 2012-06-29 | 2014-01-15 | 致伸科技股份有限公司 | Audio playing method, digital media controller and digital audio media player |
| CN103747316A (en) * | 2013-12-23 | 2014-04-23 | 乐视致新电子科技（天津）有限公司 | Audio and video synchronizing method and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090086089A1 (en) * | 2007-09-27 | 2009-04-02 | Takayuki Matsui | Video/audio output apparatus |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103514925A (en) * | 2012-06-29 | 2014-01-15 | 致伸科技股份有限公司 | Audio playing method, digital media controller and digital audio media player |
| CN103747316A (en) * | 2013-12-23 | 2014-04-23 | 乐视致新电子科技（天津）有限公司 | Audio and video synchronizing method and electronic device |
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