CN107197174A - Video controller and video control method - Google Patents
Video controller and video control method Download PDFInfo
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- CN107197174A CN107197174A CN201710335394.XA CN201710335394A CN107197174A CN 107197174 A CN107197174 A CN 107197174A CN 201710335394 A CN201710335394 A CN 201710335394A CN 107197174 A CN107197174 A CN 107197174A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/268—Signal distribution or switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The embodiment of the invention discloses a kind of Video Controller and a kind of video control method, it cuts source operation the first control signal of generation and cut source operation according to second according to first produces the second control signal, current input source according to first control signal by display window layer state attribute for the picture passage of bottom switches to target source to be cut, and according to second control signal by the display window layer state attribute of the picture passage from underlay handovers to top layer, with target source to be cut described in output display.The embodiment of the present invention can effectively lift the speed that premonitoring cuts source.
Description
Technical field
The present invention relates to video control and processing technology field, more particularly to a kind of Video Controller and a kind of video control
Method processed.
Background technology
LED display is in actual applications, it is often necessary to which various video source is shown on LED display, or is broadcasting
The midway of A video sources is put, it is necessary to the broadcasting of B video sources be switched to, if directly switched over, in fact it could happen that after video source switching
It was found that video source abnormal state, cause that LED display shows is not that user wants display or expected content.And premonitoring,
The video source signal of desired switching can then be included on the premonitoring display screen such as monitor or LCD color screens in advance, realization is being cut
The function of cut source contents is learnt before source, preferably to realize control and to prevent unexpected generation.Therefore, how to realize under premonitoring
The quick source of cutting is that have technical problem to be solved at present.
The content of the invention
Embodiments of the invention provide a kind of Video Controller and a kind of video control method, quick under premonitoring to realize
Cut the technique effect in source.
On the one hand there is provided a kind of Video Controller, including：Micro-control unit, for cutting source operation generation according to first
First control signal and according to second cut source operation produce the second control signal；And video processing unit, connect described micro-
Control unit, it is bottom by display window layer state attribute that the video processing unit, which is used for according to first control signal,
The current input source of picture passage switches to target source to be cut, and for being led to the picture according to second control signal
The display window layer state attribute in road is from underlay handovers to top layer, with target source to be cut described in output display.
Another further aspect there is provided a kind of video control method, including：Source operation generation the first control letter is cut according to first
Number；Current input source according to first control signal by display window layer state attribute for the picture passage of bottom is switched to
Target source to be cut；Source operation the second control signal of generation is cut according to second；And drawn according to second control signal by described
The display window layer state attribute of face passage is from underlay handovers to top layer, with target source to be cut described in output display.
A technical scheme in above-mentioned technical proposal has the following advantages that or beneficial effect：While premonitoring at video
Reason unit carries out cutting source action in advance in bottom, thus can be substantially improved and cut source speed.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, being used required in being described below to embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Fig. 1 be the embodiment of the present invention in a kind of Video Controller primary structure schematic diagram；
Fig. 2 is a kind of detailed construction schematic diagram in Video Controller shown in Fig. 1；
Fig. 3 is a kind of operation principle schematic diagram of the Video Controller of the embodiment of the present invention；
Fig. 4 actually cuts source schematic flow sheet for one kind of the Video Controller of the embodiment of the present invention；
Fig. 5 is a kind of schematic flow sheet of video control method of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
As shown in figure 1, a kind of Video Controller 10 provided in the embodiment of the present invention, including：Micro-control unit 11 and regard
Frequency processing unit 15；And the PLD 13 controlled for premonitoring.In the present embodiment, the connection of micro-control unit 11 can
Programmed logic device 13 and video processing unit 15 using the control end as PLD 13 and video processing unit 15,
The vision signal of input is delivered to and is connected thereto by PLD 13 as front end under the control of micro controller unit 11
Video processing unit 15 handled after export so that upper screen is shown.
Specifically, micro-control unit 11 is used to produce premonitoring control signal and according to described pre- according to the operation of pre-cut source
Cut the source operation generation of actually cutting after source is operated and cut source control signal；PLD 13 is used for according to the pre- monitoring
Target source to be cut is exported to premonitoring and shows screen display by signal processed；Video processing unit 15 is used to be controlled to believe according to the premonitoring
Number by display window layer state attribute for bottom a picture passage current input source switch to the target source to be cut, with
And for cutting source control signal by the display window layer state attribute of the picture passage from underlay handovers to top layer according to
With target source to be cut described in output display.
The present embodiment is understood for ease of clearer, below with micro-control unit 11, PLD 13 and video
The Video Controller of the present embodiment is described exemplified by respectively MCU, FPGA and STDP8028 video frequency processing chip of processing unit 15
Operation principle.
When carrying out premonitoring and cutting source, MCU because the operation of pre-cut source produce premonitoring control signal send to FPGA and
STDP8028 video frequency processing chips, now FPGA progress premonitoring action is with defeated by the target source to be cut corresponding to premonitoring control signal
Go out to be shown on premonitoring display screen, while STDP8028 video frequency processing chips are also in processing, STDP8028 video frequency processing chips will
The layer state attribute changes of its main channel are bottom, are top layer by the layer state attribute changes of its picture-in-picture (PIP) passage, then
Target source to be cut is cut into bottom in main channel.When MCU is because actually cutting that source operation produces when cutting the arrival of source control signal,
STDP8028 video frequency processing chips operate the layer state attribute upset of main channel and picture-in-picture passage, also i.e. by the stratiform of main channel
State attribute recovers to the layer state attribute that top layer and picture-in-picture lead to recover to bottom, realizes that top bottom is exchanged, you can reach the source of cutting
Effect.
Referring to Fig. 2, it illustrates for a kind of detailed construction of the Video Controller 10 of the present embodiment.As shown in Fig. 2 except micro-
Outside control unit 11, PLD 13 and video processing unit 15, it is additionally provided with：Video input interface 12, premonitoring
Interface 14, output interface 16 and human-computer interaction device；Wherein human-computer interaction device is, for example, that to cut source button 18a and man-machine interaction aobvious
Display screen 18b.Wherein, video input interface 12 connection PLD 13, its be typically multichannel interface for example simulate and/
Or digital visual interface is as DVI, HDMI etc..Premonitoring interface 14 connects PLD 13, and it can be that each is regarded
Frequency interface is such as LCD screen interface, DVI interface, HDMI, USB interface, and generally in premonitoring interface 14 and FPGA
Video coding chip can be provided between device 13 to carry out Video coding processing.Output interface 16 connects video processing unit
15, can be various video interfaces such as DVI interface, HDMI；Can certainly be other style interfaces, such as video
The rear end of controller 10 will connect LED display, then output interface 16 herein can also be network interface, be in output interface 16 certainly
The front end of output interface 16 can set sending card circuit for example including PLD and network transmission in the case of network interface
Module, and network transmission module is for example including PHY chip and network transformer.It is noted that in other embodiments, it is defeated
Outgoing interface 16 can also be not directly connected video processing unit 15, but connection PLD 13.Cut source button 18a companies
Micro-control unit 11 is connect, it is to be equipped with one per video input interface 12 all the way to cut source button 18a that it, which is, for example,, is easy to user to carry out
Pre-cut source operates and actually cut source operation.Man-machine interaction display screen 18b connections micro-control unit 11, it is, for example, LCDs
As single color LCD screen.In addition, it is noted that in other embodiments, can not also be equipped with and cut source button 18a, but it is logical
Operation premonitoring is crossed to cut source menu to realize the operation of pre-cut source and actually cut source operation.
Hold above-mentioned, be still respectively with micro-control unit 11, PLD 13 and video processing unit 15 below
A kind of work that Fig. 3 describes Video Controller shown in the present embodiment Fig. 2 is tied exemplified by MCU, FPGA and STDP8028 video frequency processing chip
Make process.
As shown in figure 3, exemplified by switching to DVI sources by HDMI sources, when user presses DVI sources for the first time cuts source button 18a,
MCU issues premonitoring control signal while also sending premonitoring control signal to STDP8028 video frequency processing chips, now to FPGA
FPGA performs following operate with STDP8028 video frequency processing chips：FPGA exports the image in DVI sources to premonitoring interface 14 to brush
It is new in the premonitoring window of premonitoring display screen, STDP8028 video frequency processing chips are in bottom (the now layer state attribute of main channel
It is switched to bottom) switch to DVI sources to be cut.When user presses same DVI sources for the second time cuts source button 18a, MCU to
STDP8028 video frequency processing chips, which are issued, cuts source control signal, and now STDP8028 video frequency processing chips need to will only push up the figure of bottom
As upset, also the layer state attribute of main channel is recovered to top layer, the DVI sources to be cut that just will can be completed in advance in underlay handovers
It is shown on target display screen.The present embodiment due to during premonitoring STDP8028 video frequency processing chips have begun in bottom
Carry out cutting source action in advance, thus can be substantially improved and cut source speed, speed has been compressed into the time of upset once, and experiment is surveyed
Source speed must be cut to control substantially within 1/5th seconds, and the not advance bottom of STDP8028 video frequency processing chips in the prior art
The source speed of cutting for cutting source mode is about 2 seconds or so, it is seen that cut source speed lifting amplitude quite big.
As seen from the above description, main channel of the premonitoring process in STDP8028 video frequency processing chips is completed after underlay handovers
At once stop without operation, being awaited orders in bottom, wait is real to cut source control signal arrival.Source control signal ought be cut afterwards to arrive
When coming, STDP8028 video frequency processing chips are overturn by carrying out top bottom layer image, you can source is cut in realization.However, in actual premonitoring
Cut in source procedure, source button not operates first cuts source button for cutting of can operating again, therefore in order to ensure cutting each time
Premonitoring process is all passed through in source, and it is therefore preferred to set up one before STDP8028 video frequency processing chips carry out top bottom layer image upset
Detection module, for judging that working as the target source to be cut corresponding to the button of source and the main channel in bottom is cut in the operation again
Whether preceding input source is consistent.
Referring to Fig. 4, when source button is cut in operation again after the completion of premonitoring, STDP8028 video frequency processing chips are detected again first
Target source to be cut corresponding to secondary operation whether and main channel in bottom current input source (namely at STDP8028 videos
The target source to be cut that reason chip bottom switches in advance) it is whether consistent, judge consistent just progress top bottom layer image turning operation, otherwise
It is considered another new premonitoring.Do not represent and terminate after the completion of the bottom layer image upset of top, STDP8028 video frequency processing chips
Also need to carry out all status informations of main channel current input source to be back to MCU, to help MCU to carry out man-machine interaction display screen
The refreshing that 18b is shown, in order to allow user to understand the specifying information of the current target source for having switched completion, lifts friendly interface
Property.
After whole flow process includes top bottom layer image upset and status information passback terminates, main channel is already present in top
Layer and bottom is picture-in-picture passage, now in order to be prepared to the source of cutting next time, it is necessary to which the picture-in-picture passage of bottom is adjusted to
It is consistent with the image of the main channel of top layer.
It is noted that previous embodiment is using MCU, FPGA and STDP8028 video frequency processing chip as micro-control
The citing of unit 11 processed, PLD 13 and video processing unit 15 illustrates structure and the work of Video Controller
Principle/process, but the present invention is not limited thereto, and for example video processing unit 15 can use other dedicated video process chips
As FLI32626 family chips, or even it can also be the video frequency processing chip based on FPGA.
Furthermore, previous embodiment is pre- to realize using the main channel of video processing unit and picture-in-picture passage (subaisle)
Prison cuts source, but in actual applications, is configured with not differentiating between two or more major and minor pictures in video processing unit 15
Passage, so, can also be directly pre- by the input source of the picture passage in bottom in the presence of premonitoring control signal
Target source to be cut is first switched to, the picture of the target source to be cut will be switched in advance in the presence of source control signal is cut afterwards
The Image Reversal of face passage by layer state attribute to top layer (also switching to top layer), and it can equally realize that premonitoring cuts the mesh in source
's.
In addition, according to previous embodiment on the structure of Video Controller and operation principle/process, summarizing a kind of video
Control method, such as including the following steps shown in Fig. 5：
S51：Source operation the first control signal of generation is cut according to first；
S52：The first target source to be cut is exported to premonitoring according to first control signal and shows screen display；
S53：According to first control signal by display window layer state attribute for bottom picture passage it is current defeated
Enter source and switch to the described first target source to be cut；
S54：According to described first cut source operation after second cut source operation generation the second control signal；
S55：Judge the current defeated of the second target source to be cut corresponding to second control signal and the picture passage
Whether consistent enter source；
S56：When the described second target source to be cut is consistent with the current input source of the picture passage, the picture is led to
The display window layer state attribute in road is from underlay handovers to top layer, with the described in output display first target source to be cut.
In the video control method shown in Fig. 5, if first cut source operation and second cut source operation for successively operate twice
It is same to cut source button, then first cut source operation be premonitoring cut source operation and second cut source operation be actually cut source operation, its will
So that second target source to be cut is consistent with the current input source of the picture passage.Further, it is to be appreciated that at other
Under situation, if first cut source operation and second cut source operation for successively operate twice it is different cut source button, first cuts source behaviour
Make and second cut source operation be premonitoring cut source operation, namely second cut source operation not actually cut source operation, its will cause institute
The current input source for stating the second target source to be cut and the picture passage is inconsistent, consequently, it is possible to which step S56 would not be performed.
In addition, step S53 is for example specifically included：According to the premonitoring control signal by key frame passage (or main channel)
Display window layer state attribute switch to bottom and the display window by secondary picture passage (such as picture-in-picture passage) from top layer
Mouth layer state attribute is from underlay handovers to top layer；And cut in the display window layer state attribute of the key frame passage from top layer
Shift to after bottom, the current input source of the key frame passage is switched into the described first target source to be cut.
In addition, when the described second target source to be cut is consistent with the current input source of the picture passage, according to described
The display window layer state attribute of the secondary picture passage is switched to low layer from top layer and draws the pair by two control signals
The current input source of face passage switches to the described first target source to be cut.
Detail as each step S51 to S56 refers to be relevant to Fig. 1 to Fig. 4 specification description, therefore herein
Repeat no more.
In summary, present invention controls video processing unit progress bottom to cut in advance while premonitoring
Source, which increases the utilization rate of video processing unit, improves the overall switch speed when premonitoring cuts source, enhances user's body
Test.Furthermore, do not conflict with existing source scheme of cutting, compatible equipment.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with
Realize by another way.For example, device embodiment described above is only schematical, for example, the unit
Divide, only a kind of division of logic function can have other dividing mode, such as multichannel unit or component when actually realizing
Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or
The coupling each other discussed or direct-coupling or communication connection can be the indirect couplings of device or unit by some interfaces
Close or communicate to connect, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multichannel
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ hardware adds the form of SFU software functional unit to realize.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (14)
1. a kind of Video Controller, it is characterised in that including：
Micro-control unit, for cutting source operation the first control signal of generation according to first and cutting source operation generation according to second
Second control signal；
Video processing unit, connects the micro-control unit, and the video processing unit is used for according to first control signal
Current input source by display window layer state attribute for the picture passage of bottom switches to target source to be cut, and for basis
Second control signal by the display window layer state attribute of the picture passage from underlay handovers to top layer, with output display
The target source to be cut.
2. Video Controller according to claim 1, it is characterised in that the Video Controller also includes：Source button is cut,
Connect the micro-control unit；Described first cut source operation and described second cut source operation for successively twice operation described in cut source by
Button, first control signal and second control signal are produced to trigger the micro-control unit respectively.
3. Video Controller according to claim 1, it is characterised in that the video processing unit includes：
First switching subelement, for according to first control signal by the display window layer state attribute of key frame passage from
Top layer switches to bottom and by the display window layer state attribute of secondary picture passage from underlay handovers to top layer；
Second switching subelement, for the current input source of the key frame passage to be switched into the target source to be cut.
4. Video Controller according to claim 3, it is characterised in that the video processing unit also includes：
3rd switching subelement, for being belonged to the display window layer state of the secondary picture passage according to second control signal
Property switches to low layer from top layer and the current input source of the secondary picture passage is switched into the target source to be cut.
5. Video Controller according to claim 1, it is characterised in that the video processing unit includes：
Judging unit, for judging the current defeated of target source to be cut corresponding to second control signal and the picture passage
Whether consistent enter source；
4th switch unit, in the current input of the target source to be cut corresponding to second control signal and the picture passage
When source is consistent, by the display window layer state attribute of the picture passage from underlay handovers to top layer.
6. Video Controller according to claim 5, it is characterised in that the video processing unit also includes：
Feedback unit, for the current input in the target source to be cut corresponding to second control signal and the picture passage
When source is consistent, the micro-control unit is given by the status information feedback of the current input source of the picture passage.
7. according to any described Video Controller of claim 1 to 6, it is characterised in that the Video Controller also includes：
PLD, connects the micro-control unit, and the PLD is used for according to the described first control
The target source to be cut is exported to premonitoring and shows screen display by signal.
8. a kind of video control method, it is characterised in that including：
Source operation the first control signal of generation is cut according to first；
Display window layer state attribute is switched for the current input source of the picture passage of bottom according to first control signal
Into target source to be cut；
Source operation the second control signal of generation is cut according to second；
According to second control signal by the display window layer state attribute of the picture passage from underlay handovers to top layer, with
Target source to be cut described in output display.
9. video control method according to claim 8, it is characterised in that first operation and the described second operation are
Successively operate twice and same cut source button.
10. video control method according to claim 8, it is characterised in that described to be incited somebody to action according to first control signal
Display window layer state attribute switches to target source to be cut for the current input source of the picture passage of bottom to be included：
According to first control signal by the display window layer state attribute of key frame passage from top layer switch to bottom and
By the display window layer state attribute of secondary picture passage from underlay handovers to top layer；
The current input source of the key frame passage is switched into the target source to be cut.
11. video control method according to claim 10, it is characterised in that the video control method also includes：
According to second control signal by the display window layer state attribute of the secondary picture passage from top layer switch to low layer,
And the current input source of the secondary picture passage is switched into the target source to be cut.
12. video control method according to claim 8, it is characterised in that described to be incited somebody to action according to second control signal
The display window layer state attribute of the picture passage is from underlay handovers to top layer, with target source bag to be cut described in output display
Include：
Judge whether the target source to be cut corresponding to second control signal is consistent with the current input source of the picture passage；
When the target source to be cut corresponding to second control signal is consistent with the current input source of the picture passage, by institute
The display window layer state attribute of picture passage is stated from underlay handovers to top layer.
13. video control method according to claim 12, it is characterised in that the video control method also includes：
When the target source to be cut corresponding to second control signal is consistent with the current input source of the picture passage, by institute
The status information feedback for stating the current input source of picture passage is gone out.
14. according to any described video control method of claim 8 to 13, it is characterised in that the video control method is also
Including：
The target source to be cut is exported to premonitoring according to first control signal and shows screen display.
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|---|---|---|---|
| CN201710335394.XA CN107197174A (en) | 2017-05-12 | 2017-05-12 | Video controller and video control method |
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| CN201710335394.XA CN107197174A (en) | 2017-05-12 | 2017-05-12 | Video controller and video control method |
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| CN111324322A (en) * | 2018-12-14 | 2020-06-23 | 西安诺瓦星云科技股份有限公司 | Multi-picture pre-monitoring configuration method, device, system and computer readable medium |
| CN111372048A (en) * | 2020-03-04 | 2020-07-03 | 深圳市迈普视通科技有限公司 | Image pre-monitoring processing equipment and method thereof, and field programmable logic gate array |
| CN111429832A (en) * | 2018-12-21 | 2020-07-17 | 西安诺瓦星云科技股份有限公司 | Synchronous control system for display controller and L ED display screen |
| CN113486020A (en) * | 2021-07-27 | 2021-10-08 | 中国银行股份有限公司 | Source switching method of basic data platform, related device and computer storage medium |
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| CN111324322A (en) * | 2018-12-14 | 2020-06-23 | 西安诺瓦星云科技股份有限公司 | Multi-picture pre-monitoring configuration method, device, system and computer readable medium |
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| CN113486020A (en) * | 2021-07-27 | 2021-10-08 | 中国银行股份有限公司 | Source switching method of basic data platform, related device and computer storage medium |
| CN113486020B (en) * | 2021-07-27 | 2024-02-23 | 中国银行股份有限公司 | Source cutting method of basic data platform, related device and computer storage medium |
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Application publication date: 20170922 |