CN107995452A - A kind of method that double-screen synchronous is shown - Google Patents
A kind of method that double-screen synchronous is shown Download PDFInfo
- Publication number
- CN107995452A CN107995452A CN201711083185.7A CN201711083185A CN107995452A CN 107995452 A CN107995452 A CN 107995452A CN 201711083185 A CN201711083185 A CN 201711083185A CN 107995452 A CN107995452 A CN 107995452A
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- China
- Prior art keywords
- data
- pixel
- output
- view data
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/015—High-definition television systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/06—Systems for the simultaneous transmission of one television signal, i.e. both picture and sound, by more than one carrier
- H04N7/063—Simultaneous transmission of separate parts of one picture
Abstract
The present invention includes a kind of method that double-screen synchronous is shown, it is characterised in that this method includes：Twice when extending display identification data are initialized when equipment starts, and the valid pixel output of extending display identification data being arranged to initialize；When the valid pixel output of output terminal detection extending display identification data doubles, the image data amount exported to needs doubles and performs output；When receiving terminal receives the view data of corresponding output terminal, odd even pixel separation is carried out to view data by hardware, and separated odd even pixel is sent by binary channels respectively；The valid pixel for the view data that adjustment binary channels is sent is reduced to Initialize installation, and view data is sent to display device and is shown.Beneficial effects of the present invention are：Using the characteristic of current mainstream conversion chip, a shuangping san is completed, it is not necessary to additional designs hardware circuit, it is not required that software carries out the operation such as data copy, and Performance And Reliability is better than other schemes.
Description
Technical field
The present invention relates to a kind of method that double-screen synchronous is shown, belong to computer realm.
Background technology
With the continuous development in AR fields, many Related products have a demand that double-screen synchronous is shown, these products it is defeated
It is all much HDMI to enter source, in order to realize shuangping san, it is necessary to design special circuit to realize after receiving data from HDMI ends
Simultaneous display.
Existing technical solution：The shuangping san technical solution of current existing HDMI is all to receive data from HDMI ends
Afterwards, special circuit is designed to realize two independent display channels, and data to be shown are copied, and is then distinguished
Two independent display channels are sent to be shown.
The shortcomings that existing technology is locally to carry out the replication work of data, and wants data to be sent to two respectively solely
Vertical display channel, these processes are required for software to complete, and can influence the real-time and synchronism of data to a certain extent.
Current display chips many on the market all support binary channels to show, if such as LVDS interface to support 1080p's
Resolution ratio, single pass bandwidth are inadequate, it is necessary to support binary channels, and one frame data are split as odd even picture when binary channels is shown
Element, then exports from two LVDS passages respectively, and display screen receives that two paths of data is merged into a frame again after data is complete
Image is shown.
EDID:Extended Display Identification Data (extending display identification data) are a kind of VESA
Standard data format, wherein including the parameter in relation to monitor and its performance, including supplier information, maximum image size, face
Color is set, factory default is put, the limitation of frequency range and display name and the character string of sequence number.
LVDS：Low-Voltage Differential Signaling (low-voltage differential signal), a kind of signal transmission
Pattern.
HDMI：High Definition Multimedia Interface, high-definition multimedia interface.
The content of the invention
Technical scheme provides a kind of method that double-screen synchronous is shown, the twin-channel physics of display device is special
Property, the reprocessing of pixel data is carried out in high-definition multimedia interface output terminal, is then output to high-definition multimedia
Interface chip, switching chip need to open binary channels characteristic when exporting, odd even pixel are separated, is directly divided into two-way
Low-voltage differential signal exports, and solves the deficiencies in the prior art.
Technical scheme includes a kind of method that double-screen synchronous is shown, it is characterised in that this method includes：Equipment
When extending display identification data are initialized during startup, and the valid pixel output of extending display identification data being arranged to initialization
Twice；B. it is right when the valid pixel output of high-definition multimedia interface output terminal detection extending display identification data doubles
The image data amount for needing to export doubles and performs output；C. high-definition multimedia interface receiving terminal receives corresponding output
During the view data at end, odd even pixel separation is carried out to view data by hardware, and separated odd even pixel is passed through respectively
Binary channels is sent；D. the valid pixel for adjusting the view data that binary channels is sent is reduced to Initialize installation, and by view data
Send to corresponding display device.
Effective output setting of the method shown according to the double-screen synchronous, wherein step A further includes：For arbitrarily depositing
Extending display identification data in image output resolution ratio is M*N and pixel clock is T setting, then pixel effectively output sets
Put including resolution ratio to be revised as to (2M) * N or M* (2N), while pixel clock is revised as 2T, while configuration information is sent
To high-definition multimedia interface output terminal.
The method shown according to the double-screen synchronous, wherein step B are further included：High-definition multimedia interface output terminal
The view data that detecting will export after extending display identification data message is reprocessed, and by data volume plus is twice so
Exported afterwards from high-definition multimedia interface output terminal, the wherein reprocessing of output terminal is included continuous view data
Replicated and keep data sorting constant.
The method shown according to the double-screen synchronous, wherein step C are further included：High-definition multimedia interface input terminal
The separation for completing odd even pixel after data by hardware is received, is directly divided into two paths of data and believes respectively from two-way low voltage difference
Number output, wherein strange pixel and dual pixel are carried out at the same time output from first passage or second channel.
The method shown according to the double-screen synchronous, wherein step D are further included：After odd even pixel separation first passage and
The output pixel clock of second channel rolls back output frequency during initialization, i.e., when image output resolution ratio is M*N and pixel
Clock is T, and view data is sent to corresponding display device and is shown.
Beneficial effects of the present invention are：Using the characteristic of current mainstream conversion chip, a shuangping san is completed, is not required to
Want additional designs hardware circuit, it is not required that software carries out the operation such as data copy, and Performance And Reliability is better than other schemes.
Brief description of the drawings
Fig. 1 show the overview flow chart of embodiment according to the present invention.
Embodiment
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings with specific embodiment pair
The present invention is described in detail.The method that the double-screen synchronous of the present invention is shown is applicable in based on available high-definition multimedia interface
Shuangping san.
Fig. 1 show the overview flow chart of embodiment according to the present invention.Its is specific as follows：
Equipment initializes EDID (extending display identification data) after starting, before the horizontal valid pixel of EDID is arranged to
2 times, such as the resolution ratio of 1280x720 is revised as the resolution ratio of 2560x720, corresponding pixel clock be also changed into before 2
Again, for example 74.25Mhz is changed into 148.5Mhz；
HDMI (high-definition multimedia interface) output terminal detects that the view data that will be exported after EDID information carries out
Then reprocessing, by data volume plus is twice from HDMI outputs, is " 1234 " than data as in the previous, is changed into after repeating
" 11223344 ", data volume doubles；
HDMI input terminals receive the separation for completing odd even pixel after data by hardware, are directly divided into two paths of data difference
Exported from two-way LVDS, for example strange pixel is exported from passage A, dual pixel is exported from passage B.
Frequency before being rolled back after odd even pixel separation per output pixel clock all the way, such as the resolution of 1280x720
Rate, pixel clock are still 74.25Mhz, ensure the normal output of image.
Pay attention to the configuration of output terminal and input terminal resolution ratio, output terminal is if 1280x720, then input terminal is namely
The resolution ratio at HDMI ends is 2560x720, be in the bandwidth range that hardware allows.HDMI output terminals need to support to produce repetition
Pixel, HDMI receiving terminals need to support binary channels.
The above, is presently preferred embodiments of the present invention, the invention is not limited in the above embodiment, as long as
It reaches the technique effect of the present invention with identical means, should all belong to protection scope of the present invention.In the protection model of the present invention
Its technical solution and/or embodiment can have a variety of modifications and variations in enclosing.
Claims (5)
1. a kind of method that double-screen synchronous is shown, it is characterised in that this method includes：
A. extending display identification data are initialized when equipment starts, and the valid pixel of extending display identification data is exported and is set
Twice during to initialize；
B. when the valid pixel output of high-definition multimedia interface output terminal detection extending display identification data doubles, to needing
The image data amount of output doubles and performs output；
C. when high-definition multimedia interface receiving terminal receives the view data of corresponding output terminal, by hardware to view data into
Row odd even pixel separation, and separated odd even pixel is sent by binary channels respectively；
D. the valid pixel for adjusting the view data that binary channels is sent is reduced to Initialize installation, and view data is sent to right
The display device answered.
2. the method that double-screen synchronous according to claim 1 is shown, it is characterised in that effective output of the step A
Setting further includes：
For the setting that image output resolution ratio is M*N and pixel clock is T in any existing extending display identification data, then
Pixel, which effectively exports setting, to be included resolution ratio being revised as (2M) * N or M* (2N), while pixel clock is revised as 2T, at the same time
Configuration information is sent to high-definition multimedia interface output terminal.
3. the method that double-screen synchronous according to claim 1 is shown, it is characterised in that the step B is further included：
High-definition multimedia interface output terminal detect the view data that will be exported after extending display identification data message into
Row reprocessing, by data volume plus is twice and then is exported from high-definition multimedia interface output terminal, wherein output terminal
Reprocessing include continuous view data is replicated and keeps data sorting constant.
4. the method that double-screen synchronous according to claim 1 is shown, it is characterised in that the step C is further included：
High-definition multimedia interface input terminal receives the separation for completing odd even pixel after data by hardware, is directly divided into two
Circuit-switched data is exported from two-way low-voltage differential signal respectively, wherein strange pixel and dual pixel from first passage or second channel at the same time
Exported.
5. the method shown according to any double-screen synchronous of claim 1,2,4, it is characterised in that the step D is also
Including：
The output frequency when output pixel clock of first passage and second channel rolls back initialization after odd even pixel separation, i.e.,
Image output resolution ratio is M*N and pixel clock is T, and view data is sent to corresponding display device and is shown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083185.7A CN107995452B (en) | 2017-11-07 | 2017-11-07 | Double-screen synchronous display method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711083185.7A CN107995452B (en) | 2017-11-07 | 2017-11-07 | Double-screen synchronous display method |
Publications (2)
| Publication Number | Publication Date |
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| CN107995452A true CN107995452A (en) | 2018-05-04 |
| CN107995452B CN107995452B (en) | 2020-09-29 |
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| CN201711083185.7A Active CN107995452B (en) | 2017-11-07 | 2017-11-07 | Double-screen synchronous display method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060055626A1 (en) * | 2004-09-16 | 2006-03-16 | Stephane Tremblay | Dual screen display using one digital data output |
| CN103106889A (en) * | 2013-02-25 | 2013-05-15 | 南京欧帝科技有限公司 | Method utilizing automatic correction extended display identification data (EDID) to improve output resolution |
| CN103164182A (en) * | 2011-12-16 | 2013-06-19 | 联想(北京)有限公司 | Extension method of display port and electronic equipment |
| CN106293588A (en) * | 2016-08-26 | 2017-01-04 | 青岛海信移动通信技术股份有限公司 | Double-screen display method and device |
| CN106354458A (en) * | 2016-08-26 | 2017-01-25 | 青岛海信移动通信技术股份有限公司 | Double-screen display method and device |
| CN106791649A (en) * | 2016-12-21 | 2017-05-31 | Tcl数码科技（深圳）有限责任公司 | A kind of display system and display methods of achievable shuangping san |
-
2017
- 2017-11-07 CN CN201711083185.7A patent/CN107995452B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060055626A1 (en) * | 2004-09-16 | 2006-03-16 | Stephane Tremblay | Dual screen display using one digital data output |
| CN103164182A (en) * | 2011-12-16 | 2013-06-19 | 联想(北京)有限公司 | Extension method of display port and electronic equipment |
| CN103106889A (en) * | 2013-02-25 | 2013-05-15 | 南京欧帝科技有限公司 | Method utilizing automatic correction extended display identification data (EDID) to improve output resolution |
| CN106293588A (en) * | 2016-08-26 | 2017-01-04 | 青岛海信移动通信技术股份有限公司 | Double-screen display method and device |
| CN106354458A (en) * | 2016-08-26 | 2017-01-25 | 青岛海信移动通信技术股份有限公司 | Double-screen display method and device |
| CN106791649A (en) * | 2016-12-21 | 2017-05-31 | Tcl数码科技（深圳）有限责任公司 | A kind of display system and display methods of achievable shuangping san |
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| Publication number | Publication date |
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| CN107995452B (en) | 2020-09-29 |
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