CN104426624B - A kind of image synchronous display method and device - Google Patents
A kind of image synchronous display method and device Download PDFInfo
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- CN104426624B CN104426624B CN201310375655.2A CN201310375655A CN104426624B CN 104426624 B CN104426624 B CN 104426624B CN 201310375655 A CN201310375655 A CN 201310375655A CN 104426624 B CN104426624 B CN 104426624B
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Abstract
The invention discloses a kind of image synchronous display method and device, the method includes the current time value determining the business board in image synchronization display system；And described current time value is written to image specific field to be shown；And determine the described image propagation delay time when transmitting each business board arrived in image synchronization display system；And obtain the maximum transmitted time delay in the propagation delay time determined；Above or equal to the described maximum transmitted time delay obtained as display time delay corresponding to described image, described display time delay be each business board after obtaining image, time delay shows the time of described image；Described display time delay is sent to business board, and instruction business board is initial with the current time value of write in the described image received, and at the end of described display time delay, shows described image.Can preferably improve the versatility that image synchronization shows, promote the utilization rate of image display system, save resource.
Description
Technical field
The present invention relates to tiled display technical field, especially relate to a kind of image synchronous display method and dress
Put.
Background technology
Along with computer technology, the progress of the network communications technology, set up distributed networked application system, carry
High testing efficiency, shared information resources, it has also become the direction of modern mainframe computer system development.
Image, including static picture, also includes dynamic video.In multi-screen image display system,
Each display screen can be able to link together between multiple business boards, as one as a business board
Individual display screen shows image.Multiple business boards are connected together as a display screen to show figure
During picture, the corresponding transmission channel of each business board, it is used for transmitting image etc..Need between multiple business boards
Retention time synchronize, can the most free from error by same width image shows out.Use under normal circumstances
Image synchronization displaying scheme be: each business board comprised in image display system display image before,
Simultaneously to clock module tranmitting data register synchronization request, clock module synchronizes at the clock receiving predetermined number please
After asking, output clock synchronizes to allow signal.Wherein, this predetermined number can be business in image display system
The quantity of plate.The clock of this output synchronizes to allow directly to transmit between signal and each business board, and each business board connects
After receiving this clock synchronization permission signal, start to show image.
But it is phase that the clock between the transmission channel that under this kind of mode, first, each business board is corresponding synchronizes
To synchronization, therefore in image display system, the configuration of each business board have to be perfectly the same, such as, have identical
Display frame rate.If the configuration of the business board in image display system is incomplete same, such as display frame rate
Differing, the most each business board is when showing image, it is impossible to simultaneous display, therefore this kind of mode has certain office
Sex-limited.Secondly, business board to clock module tranmitting data register synchronization request time, need whole image display system
All business boards tranmitting data register synchronization request together in system, the follow-up clock that just can receive clock module
Synchronize to allow signal, when the single business board in image display system breaks down, whole image can be made
Display system cannot show image, and therefore the utilization rate of whole system is relatively low.
In sum, when generally realizing image synchronization display, limitation is relatively strong, and whole image shows
The utilization rate of system is relatively low, and compares waste resource.
Summary of the invention
Embodiments provide a kind of image synchronous display method and device, it is possible to preferably improve image
The versatility of simultaneous display, promotes the utilization rate of image display system.
A kind of image synchronous display method, comprises determining that the current of business board in image synchronization display system
Time value；And described current time value is written to image specific field to be shown；And determine described figure
As the propagation delay time when transmitting each business board arrived in image synchronization display system；And obtain and determine
Maximum transmitted time delay in propagation delay time；Above or equal to the described maximum transmitted time delay obtained as described
The display time delay that image is corresponding, described display time delay is each business board after obtaining image, described in time delay show
The time of image；Described display time delay is sent to business board, and instruction business board is with the described image received
The current time value of middle write is initial, at the end of described display time delay, shows described image.
From technique scheme it can be seen that for each business board image synchronization display system, respectively
Being made without information between business board mutual, preferably save resource, each business board uses current time
Value is as lock in time, and the time between each business board is exhausted with unified current time value as foundation
To synchronization, even if the configuration of each business board in image synchronization display system is incomplete same, the most all according to being somebody's turn to do
Current time value does absolute synchronization, therefore overcomes the circumscribed problem of image synchronization display system application,
When there being business board to break down, do not interfere with other business board yet, improve making of liter image display system
By rate.
Determine the current time value of business board in described image synchronization display system, including to described image with
Business board in step display system sends system time initial value；Receiving the sound when described business board sends
When answering message, send correcting delay signal to business board, instruction business board use when correcting delay signal arrives described in connect
The system time initial value received is as current time value, and wherein said response message is that business board is receiving
Send during described system time initial value.
From technique scheme it can be seen that the time between each business board is the current time unified with
Value is the absolute synchronization of foundation, and fault-tolerant ability is relatively strong, and single business board fault does not results in the card of whole system
Extremely.
After transmission correcting delay signal is to business board, also include: if it is determined that described image synchronization display system
In comprise newly inserted business board, business board in described image synchronization display system sends system time school
Quasi-value；And at the unit of time transmission correcting delay signal through predetermined number to business board, indicate newly inserted
Business board use when receiving described correcting delay signal described in the system time calibration value that receives as currently
Time value, and indicate the current time value of other business plate report self, and at other business plate reports
When current time value and described system time calibration value are inconsistent, again in described image synchronization display system
Business board send system time initial value.
From technique scheme it can be seen that between each business board synchronous efficiency higher, each business board it
Between be made without mutual, can arbitrarily increase newly or reduce business board.
A kind of image synchronization display device, including: current time value determines module, is used for determining described image
The current time value of the business board in synchronous display system；Writing module, for writing described current time value
Enter to image specific field to be shown；Propagation delay time determines module, is used for determining that image is at transmission arrival figure
As propagation delay time during each business board in synchronous display system；Display time delay determines module, is used for obtaining really
Maximum transmitted time delay in the propagation delay time made；Make above or equal to the described maximum transmitted time delay obtained
For the display time delay that described image is corresponding, described display time delay be each business board after obtaining image, time delay shows
Show the time of described image；Sending module, for described display time delay is sent to business board, indicates business
Plate is initial with the current time value of write in the described image received, at the end of described display time delay,
Show described image.
From technique scheme it can be seen that for each business board image synchronization display system, respectively
Being made without information between business board mutual, preferably save resource, each business board uses current time
Value is as lock in time, and the time between each business board is exhausted with unified current time value as foundation
To synchronization, even if the configuration of each business board in image synchronization display system is incomplete same, the most all according to being somebody's turn to do
Current time value does absolute synchronization, therefore overcomes the circumscribed problem of image synchronization display system application,
When there being business board to break down, do not interfere with other business board yet, improve making of liter image display system
By rate.
Described current time value determines module, specifically for the business board in described image synchronization display system
Send system time initial value；When receiving when the response message that described business board sends, letter when sending school
Number give business board, instruction business board use when correcting delay signal arrives described in the system time initial value that receives
As current time value, wherein said response message is that business board is when receiving described system time initial value
Send.
From technique scheme it can be seen that the time between each business board is the current time unified with
Value is the absolute synchronization of foundation, and fault-tolerant ability is relatively strong, and single business board fault does not results in the card of whole system
This.
Described sending module, is additionally operable to after transmission correcting delay signal is to business board, however, it is determined that go out described image
Comprising newly inserted business board in synchronous display system, the business board in described image synchronization display system is sent out
Send system time calibration value；And at the unit of time transmission correcting delay signal through predetermined number to business board,
Indicate newly inserted business board use when receiving described correcting delay signal described in the system time school that receives
Quasi-value is as current time value, and indicates the current time value of other business plate report self, and at other
When the current time value of business plate report and described system time calibration value are inconsistent, again same to described image
Business board in step display system sends system time initial value.
From technique scheme it can be seen that between each business board synchronous efficiency higher, each business board it
Between be made without mutual, can arbitrarily increase newly or reduce business board.
Accompanying drawing explanation
Fig. 1 is in the embodiment of the present invention, the image synchronous display method flow chart of proposition；
Fig. 2 is in the embodiment of the present invention, and a kind of correcting delay signal of proposition triggers schematic diagram；
Fig. 3 is in the embodiment of the present invention, the image synchronization display device structure composition schematic diagram of proposition.
Detailed description of the invention
For when generally realizing image synchronization display, limitation is relatively strong, whole image display system
The problem that utilization rate is relatively low, in the technical scheme that the embodiment of the present invention proposes, is determined by image synchronization and shows
The current time value of the business board in system, and current time value is written to image designated word to be shown
Duan Zhong, and determine that image arrives the propagation delay time of each business board, and then determine the display time delay that image is corresponding,
This display time delay is sent to business board, and instruction business board is with in the described image that receives during write current
Between value be initial, at the end of described display time delay, show described image.For image synchronization display system
In each business board for, the information that is made without between each business board is mutual, preferably saves resource,
Each business board uses current time value as lock in time, and the time between each business board is with a unification
Current time value is the absolute synchronization of foundation, even if the configuration of each business board in image synchronization display system is not
Identical, the most all do absolute synchronization according to this current time value, therefore overcome image synchronization display system
The circumscribed problem of application, when there being business board to break down, does not interferes with other business board yet, improves
Rise the utilization rate of image display system.
Embodiment of the present invention technical scheme main is realized principle below in conjunction with each accompanying drawing, is embodied as
Mode and the beneficial effect that should be able to reach is set forth in.
The embodiment of the present invention proposes a kind of image synchronous display method, as it is shown in figure 1, its handling process is as follows
State:
Step 11, determines the current time value of business board in image synchronization display system.
The embodiment of the present invention propose technical scheme in, image synchronization display system include at least one piece for
The business board of display image.Any one piece of business board at least one piece of business board, can comprise a signal
Processor, it is also possible to be that in whole image synchronization display system, whole business boards or partial service plate share one
Individual signal processor.Business board in image synchronization display system can be further divided into according to concrete function
For obtaining the collection plate of image to be displayed, for the decoding deck that image to be displayed is decoded, for right
Decoded image to be displayed carries out the output board etc. shown.In the technical scheme that the embodiment of the present invention proposes,
For ease of illustrating, it is referred to as business board.
Signal processor can be central processing unit (English: central processing unit, abbreviation: CPU),
Or CPU and the combination of hardware chip.Signal processor 802 can also is that network processing unit (English:
Network processor, abbreviation: NP).Or the combination of CPU and NP, or NP and hardware
The combination of chip.
Above-mentioned hardware chip can be the combination of one or more of: special IC (English:
Application-specific integrated circuit, abbreviation: ASIC), field programmable gate array (English
Literary composition: field-programmable gate array, abbreviation: FPGA), CPLD (English:
Complex programmable logic device, abbreviation: CPLD).
Alternatively, in the case of signal processor is the CPU or the CPU combination with hardware chip, in
Continuing and can also include memorizer, memorizer is used for storing program code, and residing signal processor is from memorizer
Obtain the program code of storage, perform correspondingly to process according to the programmatic agent obtained.
Memorizer can be volatile memory (English: volatile memory), such as random access memory
Device (English: random-access memory, abbreviation: RAM)；Or nonvolatile memory (English:
Non-volatile memory), such as read only memory (English: read-only memory, abbreviation: ROM),
Flash memory (English: flash memory), and hard disk (English: hard disk drive, abbreviation: HDD)
Or solid state hard disc (English: solid-state drive, abbreviation: SSD)；Or the memorizer of mentioned kind
Combination.
In image synchronization display system, can be connected by bus between business board and business board, business board
The data such as the image to be shown that can be transmitted by interface transmission channel and current time value.
Interface can be one or more of: be provided with line interface network interface controller (English:
Network interface controller, abbreviation: NIC), such as Ethernet NIC, this Ethernet NIC can
To provide copper cash and/or optical fiber interface；The NIC of wave point is provided, such as WLAN (English:
Wireless local area network, abbreviation: WLAN) NIC.
Can determine the current time value of business board in image synchronization display system in the following manner:
Step one: the business board in image synchronization display system sends system time initial value.
Step 2: receive when business board send response message time, send correcting delay signal to business board,
Instruction business board uses the system time initial value received as current time value when correcting delay signal arrives.
Wherein response message is that business board sends when receiving described system time initial value.
It is preferred that in above-mentioned steps two after transmission correcting delay signal is to business board, it is also possible to including:
Step 3: if it is determined that comprise newly inserted business board in image synchronization display system, to image synchronization
Business board in display system sends system time calibration value, and sends out at the unit of time through predetermined number
Send correcting delay signal to business board, indicate newly inserted business board to use when receiving correcting delay signal and receive
System time calibration value is as current time value, and indicates the current time of other business plate report self
Value, and when the current time value of other business plate reports and system time calibration value are inconsistent, again to figure
As the business board in synchronous display system sends system time initial value.
In image synchronization display system, if there being newly inserted business board, then this newly inserted business board obtains
The detailed description of the invention of current time value can comprise following several ways:
First kind of way: the mode of active obtaining.Under this kind of mode, receive newly inserted business board and actively send out
The acquisition current time value request sent.
When receiving the acquisition current time value request that newly inserted business board actively sends, to image synchronization
Business board in display system sends system time calibration value.
The unit of time of the current time value+predetermined number of system time calibration value=image synchronization display system
T
Correcting delay signal is sent to business board, the most newly inserted business board at the unit of time T through predetermined number
Use the system time calibration value received as current time value when receiving correcting delay signal.Believe during this school
Number can be rising edge or the trailing edge of a certain waveform.Such as, as in figure 2 it is shown, this correcting delay signal is permissible
It it is the rising edge of pulse signal.After the unit of time T of predetermined number, when arriving the upper of pulse signal
Rise along time, send correcting delay signal to business board, indicate newly inserted business board to use the system time received
Calibration value is as current time value.
In above-mentioned first kind of way, before sending correcting delay signal, need to wait the unit of time of predetermined number,
Just can send correcting delay signal to each business board.This is because in image synchronization display system, each business board
The position arranged is incomplete same, and therefore signal is when transmission, and the time arriving each business board is the most incomplete
Identical.It is described in detail as an example.Assume that the business board in image synchronization display system sends system
Time calibration, value was 23 seconds, but the current time value of the business board actually in image synchronization display system
It is 20 seconds, owing to signal is in transmission to the time delay in each business board, a certain in image synchronization display system
Business board receive be worth 23 seconds time calibration when, the now business board in image synchronization display system
Current time value have arrived at 22 seconds, therefore for ensureing each business board in image synchronization display system
Can use and be worth identical time calibration 23 seconds, then need, 23 seconds when, to draw high correcting delay signal, protect
Demonstrate,proving each business board can use be worth 23 seconds as current time value time calibration according to the correcting delay signal received.
And between 20～22 seconds, maintenance correcting delay signal is low level.
Wherein, unit of time T set forth above can take empirical value according to actual motion.
For in image synchronization display system except other business boards of newly inserted business board, when receiving
During correcting delay signal, the current time value of self can be reported, and at the current time value of other business plate reports
Time inconsistent with system time calibration value, when the business board in image synchronization display system sends system again
Between initial value.If the current time value of other business plate reports is consistent with system time calibration value, then terminate
Process.
The second way: the passive mode obtained.Under this kind of mode, newly inserted business board does not send acquisition
The request of current time value.But detected, when the system determined has newly inserted business board by timing
Time, the business board in image synchronization display system sends system time calibration value, and through predetermined number
Unit of time time send correcting delay signal to business board.
The unit of time of the current time value+predetermined number of system time calibration value=image synchronization display system
T
Correcting delay signal is sent to business board, the most newly inserted business board at the unit of time T through predetermined number
Use the system time calibration value received as current time value when receiving correcting delay signal.Believe during this school
Number can be rising edge or the trailing edge of a certain waveform.
Wherein, correcting delay signal is elaborated and refers to elaborating in above-mentioned first kind of way, this
Mode repeats no more.
In the technical scheme that the embodiment of the present invention is set forth above, for whole image synchronization display system,
Share a unified elapsed time clock, such as, take 100Mhz.(such as gather or aobvious during the work of each business board
Show) all using this unified elapsed time clock as clock source, the i.e. embodiment of the present invention set forth above with this
Unified elapsed time clock determines current time value.Such as under 100Mhz elapsed time clock, basic unit of time
Can be 10ns, T the i.e. 10Tns of unit of time.
For in image synchronization display system except other business boards of newly inserted business board, when receiving
During correcting delay signal, the current time value of self can be reported, and at the current time value of other business plate reports
Time inconsistent with system time calibration value, when the business board in image synchronization display system sends system again
Between initial value.If the current time value of other business plate reports is consistent with system time calibration value, then terminate
Process.
The third mode: when there being newly inserted business board in the system determined, unified aobvious to image synchronization
Show that each business board in system resends a new time value, and at the unit of time through predetermined number
T sends correcting delay signal and when correcting delay signal arrives, makes to each business board, each business board in instruction system
By new time value as current time value.
Step 12, is written to image specific field to be shown by current time value.
For image to be shown, this image to be shown can be decoded the current time that will determine
Value is written in the specific field of image to be shown.Image to be shown can also be extended, ought
Front time value is written in the field after extension.
Step 13, when determining the image transmission when transmitting each business board arrived in image synchronization display system
Prolong.
Owing to each business board is disposing when, its position in image synchronization display system also differs,
Therefore image is the most incomplete same, therefore in the time gone through being transferred to each business board by transmission channel
Determine propagation delay time during image transmitting each business board of arrival respectively.
Step 14, according to the propagation delay time determined, determines the display time delay that image is corresponding.
Obtain the maximum transmitted time delay in the propagation delay time determined, and above or equal to the maximum biography obtained
Defeated time delay is as display time delay corresponding to image.
For example, it is assumed that image synchronization display system comprises altogether three pieces of business boards, be respectively business board 1,
Business board 2 and business board 3, image is being transferred to business board 1, business board 2 and business by transmission channel
The time that plate 3 is gone through is 2ms, 3ms and 4.5ms respectively, then this time is that image transmitting arrives each industry
Propagation delay time during business plate.Owing to the propagation delay time of image transmitting to business board 3 is 4.5ms, more than transmission
To business board 1, the propagation delay time of business board 2, therefore show that time delay may determine that as 4.5ms, or
Numerical value more than 4.5ms.
Step 15, is sent to business board by display time delay.
Business board is initial with the current time value of write in the image received, at the end of display time delay,
Show described image.
Under initial condition, display time delay can be to preset an empirical value, when detecting that image passes through to pass
Defeated channel transfer to a certain business board time more than this empirical value time, then can revise this display by bus
Time delay, and it is sent to each business board.Business board is initial with the current time value of write in the image received,
At the end of display time delay, the image that display receives.
Correspondingly, the embodiment of the present invention also proposes a kind of image synchronization display device, and its structure forms such as Fig. 3
Shown in, including:
Current time value determines module 201, for determining business board in described image synchronization display system
Current time value.
Writing module 202, for being written to image specific field to be shown by described current time value.
Propagation delay time determines module 203, for determining that image is in transmission arrives image synchronization display system
Propagation delay time during each business board.
Display time delay determines module 204, for obtaining the maximum transmitted time delay in the propagation delay time determined；
Above or equal to the described maximum transmitted time delay obtained as display time delay corresponding to described image, described aobvious
Showing that time delay is each business board after obtaining image, time delay shows the time of described image.
Sending module 205, for described display time delay is sent to business board, instruction business board is to receive
Described image in write current time value be initial, at the end of described display time delay, show described figure
Picture.
Specifically, above-mentioned current time value determines module 201, specifically for the display of described image synchronization being
Business board in system sends system time initial value；Receiving the response message when described business board sends
Time, send correcting delay signal to business board, instruction business board use when correcting delay signal arrives described in receive
System time initial value is as current time value, and wherein said response message is that business board is receiving described system
Send during system time initial value.
Specifically, above-mentioned sending module 205, it is additionally operable to after transmission correcting delay signal is to business board, if really
Make in described image synchronization display system and comprise newly inserted business board, to described image synchronization display system
In business board send system time calibration value；And send school letter at the unit of time through predetermined number
Number give business board, indicate newly inserted business board use when receiving described correcting delay signal described in receive
System time calibration value is as current time value, and indicates the current time of other business plate report self
Value, and when the current time value of other business plate reports and described system time calibration value are inconsistent, again
Business board in described image synchronization display system sends system time initial value.
The image synchronization display device that the embodiment of the present invention is set forth above, can be as image synchronization display system
In an autonomous device, it is also possible to as an integration module, be integrated on any one business board.Relatively
Goodly, the embodiment of the present invention here using this image synchronization display device as an independent component devices, example
As can be as the time service central apparatus of whole image synchronization display system.When this image synchronization display device is made
During for the time service central apparatus of whole image synchronization display system, each business board in image synchronization display system
All use the clock that this image synchronization display device provides as homology clock, determine current time value.
It will be understood by those skilled in the art that embodiments of the invention can be provided as method, device (equipment),
Or computer program.Therefore, the present invention can use complete hardware embodiment, complete software implementation,
Or combine the form of embodiment in terms of software and hardware.And, the present invention can use one or more its
In include the computer-usable storage medium of computer usable program code and (include but not limited to disk storage
Device, read-only optical disc, optical memory etc.) form of the upper computer program implemented.
The present invention is with reference to method, device (equipment) and computer program according to embodiments of the present invention
Flow chart and/or block diagram describe.It should be understood that can by computer program instructions flowchart and/or
Flow process in each flow process in block diagram and/or square frame and flow chart and/or block diagram and/or square frame
In conjunction with.These computer program instructions can be provided to general purpose computer, special-purpose computer, Embedded Processor
Or the processor of other programmable data processing device is to produce a machine so that by computer or other
The instruction that the processor of programmable data processing device performs produce for realizing in one flow process of flow chart or
The device of the function specified in multiple flow processs and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (2)
1. an image synchronous display method, it is characterised in that including:
Determine the current time value of business board in image synchronization display system；And
Described current time value is written to image specific field to be shown；And
Determine propagation delay time during the described image each business board in transmission arrives image synchronization display system；
And
Obtain the maximum transmitted time delay in the propagation delay time determined；
Above or equal to the described maximum transmitted time delay obtained as display time delay corresponding to described image, institute
Stating display time delay is each business board after obtaining image, and time delay shows the time of described image；
Described display time delay is sent to business board, and instruction business board is with write in the described image that receives
Current time value is initial, at the end of described display time delay, shows described image, wherein:
Determine the current time value of business board in described image synchronization display system, including: to described image
Each business board in synchronous display system sends system time initial value；Receiving the response that business board sends
During message, transmission correcting delay signal, to business board, indicates each business board to use when correcting delay signal arrives and receives
Described system time initial value as current time value, wherein said response message is that business board is receiving
Send during described system time initial value；
After transmission correcting delay signal is to each business board, also include: if it is determined that the display of described image synchronization is
System comprises newly inserted business board, when each business board in described image synchronization display system sends system
Between calibration value；And at the unit of time transmission correcting delay signal through predetermined number to each business board, instruction is new
The business board inserted uses the described system time calibration value received to make when receiving described correcting delay signal
For current time value, and indicate the current time value of other business plate report self, and at other business boards
When the current time value reported and described system time calibration value are inconsistent, again show to described image synchronization
Business board in system sends system time initial value.
2. an image synchronization display device, it is characterised in that described image synchronization display device applications exists
In image synchronization display system, described device includes:
Current time value determines module, for determining the current time of the business board in image synchronization display system
Value；
Writing module, for being written to image specific field to be shown by described current time value；
Propagation delay time determines module, for determining the image each industry in transmission arrives image synchronization display system
Propagation delay time during business plate, it is thus achieved that the maximum transmitted time delay in the propagation delay time determined；
Display time delay determines module, for obtaining the maximum transmitted time delay in the propagation delay time determined；Will be big
In or equal to the described maximum transmitted time delay obtained as display time delay corresponding to described image, during described display
Prolonging is each business board after obtaining image, and time delay shows the time of described image；
Sending module, for described display time delay is sent to business board, instruction business board is with the institute received
It is initial for stating the current time value of write in image, at the end of described display time delay, shows described image；
Described current time value determines module, specifically for the business board in described image synchronization display system
Send system time initial value；When receiving when the response message that described business board sends, letter when sending school
Number give business board, instruction business board use the described system time initial value received when correcting delay signal arrives
As current time value, wherein said response message is that business board is when receiving described system time initial value
Send；
Described sending module, is additionally operable to after transmission correcting delay signal is to business board, however, it is determined that go out described image
Comprising newly inserted business board in synchronous display system, the business board in described image synchronization display system is sent out
Send system time calibration value；And at the unit of time transmission correcting delay signal through predetermined number to business board,
Newly inserted business board is indicated to use the described system time school received when receiving described correcting delay signal
Quasi-value is as current time value, and indicates the current time value of other business plate report self, and at other
When the current time value of business plate report and described system time calibration value are inconsistent, again same to described image
Business board in step display system sends system time initial value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375655.2A CN104426624B (en) | 2013-08-26 | 2013-08-26 | A kind of image synchronous display method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375655.2A CN104426624B (en) | 2013-08-26 | 2013-08-26 | A kind of image synchronous display method and device |
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| CN105657511B (en) * | 2015-12-29 | 2019-03-26 | 广州视源电子科技股份有限公司 | Image synchronous display method and device |
| CN107562397B (en) * | 2017-09-04 | 2020-11-10 | 歌尔科技有限公司 | Dynamic frequency modulation method and device |
| CN111083309B (en) * | 2018-10-18 | 2022-04-01 | 北京魔门塔科技有限公司 | Time alignment method of multi-sensor data and data acquisition equipment |
| CN113691837B (en) * | 2021-08-25 | 2024-03-19 | 京东方科技集团股份有限公司 | Method, device, system and storage medium for controlling playing of video |
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