CN104935999A - VGA signal selection switching module and method applied to OSD menu - Google Patents
VGA signal selection switching module and method applied to OSD menu Download PDFInfo
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- CN104935999A CN104935999A CN201510294583.8A CN201510294583A CN104935999A CN 104935999 A CN104935999 A CN 104935999A CN 201510294583 A CN201510294583 A CN 201510294583A CN 104935999 A CN104935999 A CN 104935999A
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- signal
- rgb
- osd
- hsync
- vsync
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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
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
-
- 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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention discloses a VGA signal selection switching module and method applied to an OSD menu. The structure of the module comprises a Hsync and Vsync determination and generation module, a DA conversion module, and an RGB analog selection switch, wherein the Hsync and Vsync determination and generation module is used for the determination of Hsync and Vsync signals which are inputted from the outside or generated internally. The DA conversion module is used for converting a logically-generated OSD RGB signal into an analog signal. The RGB analog selection switch is used for selecting RGB signals of OSD RGB and external video stream, i.e., the OSD RGB signal. The selection switching method is achieved based on the module. Compared with the prior art, the module and method are high in compatibility, are flexible in design, are simple and convenient in enforcement, are wide in application prospect, are not limited by an external VGA signal source, can achieve the overlapped display of the OSD menu and an external VGA signal, and facilitate users' operation, are high in practicality, and are easy to popularize.
Description
Technical field
The present invention relates to computer kvm system field, specifically a kind of selection handover module of practical, the VGA signal that is applied to OSD menu and method.
Background technology
VGA (Video Graphics Array) is a kind of video transmission standard that IBM releases, and has the advantages such as resolution is high, display speed is fast, various colors, is widely used in color monitor field.Along with the raising of system complexity, OSD menu seems more and more important.Such as, but in many scenes when the VGA signal source of outside does not have, master dormant, VGA holding wire fault etc., OSD menu just cannot normally show, and brings a great difficult problem to the operation of people.
Based on this, now provide a kind of the selection handover module and the method that are applied to the VGA signal of OSD menu.This module and method meter periodically can detect outside H, V signal, and when not having outside H, V, inner H, the V signal of equally can producing is for the display of OSD menu, and H here, V signal refer to Hsync, Vsync signal.
Summary of the invention
Technical assignment of the present invention is for above weak point, provides a kind of selection handover module and method of practical, the VGA signal that is applied to OSD menu.
Be applied to a selection handover module for the VGA signal of OSD menu, its structure comprises judgement and generation module, D/A conversion module and the RGB analog selection switch of Hsync, Vsync, wherein:
The judgement of Hsync, Vsync and generation module, for judging outside input or inner generation Hsync, Vsync signal;
D/A conversion module, is transformed into analog signal for OSD rgb signal logic produced;
RGB analog selection switch, for selecting the rgb signal of OSD RGB and external video stream, i.e. OSD rgb signal.
The judgement of described Hsync, Vsync and generation module judge generative process as: first determine whether outside Hsync, Vsync signal inputted, if had, Hsync, Vsync signal adopting this external, otherwise just inner generation Hsync, Vsync signal, then uses Hsync, Vsync signal of this generation.
Described Hsync, Vsync judge that the judgement timing of generation module completes, and this timing judges that the rolling counters forward by producing inner Hsync, Vsync signal realizes.
The high speed of RGB analog selection switch is selected to refer to: the selection signal of effective coverage as RGB analog selection switch adopting OSD, when exporting the rgb signal of OSD when OSD viewing area, otherwise, the rgb signal of outputting video streams.
Use above-mentioned handover module to be applied to a VGA signal behavior changing method of OSD, its specific implementation process is:
1) the above-mentioned input of selection handover module is connected with the USB interface of external host, output is connected with display;
2) when there being outside VGA signal source, the rgb signal of this VGA is switched by the selection of analog selection switch, realizes the RGB of OSD and the outside Overlapping display of RGB on screen;
3) when not having outside VGA signal source, inner Hsync, Vsync signal is adopted to realize the display of OSD menu.
Described step 2) detailed process be:
When there is signal in the VGA source of outside, Hsync, Vsync judge that generation module periodically detects the rising edge of VGA_Hsync and VGA_Vsync, in time both detecting, and this module outputting VGA _ Hsync and VGA_Vsync;
First the rgb signal of OSD converts analog signal to through D/A conversion module and enters RGB analog selection switch, and the selection carrying out RGB in conjunction with OSD_area signal exports, and realizes Overlapping display over the display.
The detailed process of described step 3) is:
When the VGA source of outside does not have signal, Hsync, Vsync judge that generation module module exports inner Hsync and Vsync produced, and RGB analog selection switch only exports the RGB of OSD, and such display only shows OSD menu;
The selection signal of RGB analog selection switch adopts the effective coverage of OSD, and when selecting the RGB of OSD in screen during OSD region, otherwise select outside rgb signal, this signal is produced by the logic producing OSD RGB.
A kind of selection handover module and method being applied to the VGA signal of OSD menu of the present invention, has the following advantages:
A kind of selection handover module and method being applied to the VGA signal of OSD menu that the present invention proposes, can realize not having the OSD of outside VGA signal source to show, and the RGB of OSD and outside rgb signal Overlapping display when having an outside VGA signal source, compatible strong, flexible design, be easy to implement and have a extensive future, not by the restriction of outside VGA signal source, the Overlapping display of OSD menu and outside VGA signal can be realized, facilitate the operation of user, practical, be easy to promote.
Accompanying drawing explanation
Accompanying drawing 1 is for being applied to the VGA signal behavior handover module design principle block diagram of OSD;
Accompanying drawing 2 is the connection block diagram of this module in practical application.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The invention provides a kind of selection handover module being applied to the VGA signal of OSD menu, as shown in Figure 1, its structure comprises judgement and generation module, D/A conversion module and the RGB analog selection switch of Hsync, Vsync, wherein:
The judgement of Hsync, Vsync and generation module, for judging outside input or inner generation Hsync, Vsync signal;
D/A conversion module, is transformed into analog signal for OSD rgb signal logic produced;
RGB analog selection switch, for selecting the rgb signal of OSD RGB and external video stream, i.e. OSD rgb signal.
The judgement of described Hsync, Vsync and generation module judge generative process as: first determine whether outside Hsync, Vsync signal inputted, if had, Hsync, Vsync signal adopting this external, otherwise just inner generation Hsync, Vsync signal, then uses Hsync, Vsync signal of this generation.
Described Hsync, Vsync judge that the judgement timing of generation module completes, and this timing judges that the rolling counters forward by producing inner Hsync, Vsync signal realizes.
The high speed of RGB analog selection switch is selected to refer to: the selection signal of effective coverage as RGB analog selection switch adopting OSD, when exporting the rgb signal of OSD when OSD viewing area, otherwise, the rgb signal of outputting video streams.
As shown in Figure 2, a kind of VGA signal behavior changing method using above-mentioned handover module to be applied to OSD, its specific implementation process is:
1) the above-mentioned input of selection handover module is connected with the USB interface of external host, output is connected with display;
2) when there being outside VGA signal source, the rgb signal of this VGA is switched by the selection of analog selection switch, realizes the RGB of OSD and the outside Overlapping display of RGB on screen;
3) when not having outside VGA signal source, inner Hsync, Vsync signal is adopted to realize the display of OSD menu.
Described step 2) detailed process be:
When there is signal in the VGA source of outside, Hsync, Vsync judge that generation module periodically detects the rising edge of VGA_Hsync and VGA_Vsync, in time both detecting, and this module outputting VGA _ Hsync and VGA_Vsync;
First the rgb signal of OSD converts analog signal to through D/A conversion module and enters RGB analog selection switch, and the selection carrying out RGB in conjunction with OSD_area signal exports, and realizes Overlapping display over the display.
The detailed process of described step 3) is:
When the VGA source of outside does not have signal, Hsync, Vsync judge that generation module module exports inner Hsync and Vsync produced, and RGB analog selection switch only exports the RGB of OSD, and such display only shows OSD menu;
The selection signal of RGB analog selection switch adopts the effective coverage of OSD, and when selecting the RGB of OSD in screen during OSD region, otherwise select outside rgb signal, this signal is produced by the logic producing OSD RGB.
The rgb signal of OSD is produced by logic, and it judges that the CLK that the H after generating produces through PLL produces by Hsync, Vsync, and guarantee rgb signal is synchronous with H's.
The present invention is mainly used in kvm system, can realize not having the OSD of outside VGA signal source to show, and the RGB of OSD and outside rgb signal Overlapping display when having an outside VGA signal source.
Above-mentioned embodiment is only concrete case of the present invention; scope of patent protection of the present invention includes but not limited to above-mentioned embodiment; the selection handover module of VGA signal of any a kind of OSD of being applied to menu according to the invention and claims of method and the those of ordinary skill of any described technical field to its suitable change done or replacement, all should fall into scope of patent protection of the present invention.
Claims (7)
1. be applied to a selection handover module for the VGA signal of OSD menu, it is characterized in that, its structure comprises judgement and generation module, D/A conversion module and the RGB analog selection switch of Hsync, Vsync, wherein:
The judgement of Hsync, Vsync and generation module, for judging outside input or inner generation Hsync, Vsync signal;
D/A conversion module, is transformed into analog signal for OSD rgb signal logic produced;
RGB analog selection switch, for selecting the rgb signal of OSD RGB and external video stream, i.e. OSD rgb signal.
2. a kind of selection handover module being applied to the VGA signal of OSD menu according to claim 1, it is characterized in that, the judgement of described Hsync, Vsync and generation module judge generative process as: first determine whether outside Hsync, Vsync signal inputted, if had, Hsync, Vsync signal adopting this external, otherwise just inner generation Hsync, Vsync signal, then uses Hsync, Vsync signal of this generation.
3. a kind of selection handover module being applied to the VGA signal of OSD menu according to claim 1 and 2, it is characterized in that, described Hsync, Vsync judge that the judgement timing of generation module completes, and this timing judges that the rolling counters forward by producing inner Hsync, Vsync signal realizes.
4. a kind of selection handover module being applied to the VGA signal of OSD menu according to claim 1, it is characterized in that, the high speed of RGB analog selection switch is selected to refer to: the selection signal of effective coverage as RGB analog selection switch adopting OSD, when exporting the rgb signal of OSD when OSD viewing area, otherwise, the rgb signal of outputting video streams.
5. use above-mentioned handover module to be applied to a VGA signal behavior changing method of OSD, it is characterized in that, specific implementation process is:
1) the above-mentioned input of selection handover module is connected with the USB interface of external host, output is connected with display;
2) when there being outside VGA signal source, the rgb signal of this VGA is switched by the selection of analog selection switch, realizes the RGB of OSD and the outside Overlapping display of RGB on screen;
3) when not having outside VGA signal source, inner Hsync, Vsync signal is adopted to realize the display of OSD menu.
6. a kind of selection changing method being applied to the VGA signal of OSD menu according to claim 5, is characterized in that, described step 2) detailed process be:
When there is signal in the VGA source of outside, Hsync, Vsync judge that generation module periodically detects the rising edge of VGA_Hsync and VGA_Vsync, in time both detecting, and this module outputting VGA _ Hsync and VGA_Vsync;
First the rgb signal of OSD converts analog signal to through D/A conversion module and enters RGB analog selection switch, and the selection carrying out RGB in conjunction with OSD_area signal exports, and realizes Overlapping display over the display.
7. a kind of selection changing method being applied to the VGA signal of OSD menu according to claim 1, it is characterized in that, the detailed process of described step 3) is:
When the VGA source of outside does not have signal, Hsync, Vsync judge that generation module module exports inner Hsync and Vsync produced, and RGB analog selection switch only exports the RGB of OSD, and such display only shows OSD menu;
The selection signal of RGB analog selection switch adopts the effective coverage of OSD, and when selecting the RGB of OSD in screen during OSD region, otherwise select outside rgb signal, this signal is produced by the logic producing OSD RGB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510294583.8A CN104935999A (en) | 2015-06-02 | 2015-06-02 | VGA signal selection switching module and method applied to OSD menu |
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| CN201510294583.8A CN104935999A (en) | 2015-06-02 | 2015-06-02 | VGA signal selection switching module and method applied to OSD menu |
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| CN104935999A true CN104935999A (en) | 2015-09-23 |
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| CN201510294583.8A Pending CN104935999A (en) | 2015-06-02 | 2015-06-02 | VGA signal selection switching module and method applied to OSD menu |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105681703A (en) * | 2016-01-19 | 2016-06-15 | 浪潮集团有限公司 | OSD chip compatible to multiple interfaces |
| CN108874276A (en) * | 2018-06-11 | 2018-11-23 | 山东超越数控电子股份有限公司 | A kind of system and method for realizing OSD menu function on VGA display |
| CN114371763A (en) * | 2020-10-14 | 2022-04-19 | 苏州佳世达电通有限公司 | Display device and operation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020075256A1 (en) * | 2000-09-13 | 2002-06-20 | Nokia Multimedia Terminals Oy | Method and arrangement for synchronising on-screen display functions during analog signal reception |
| CN1393009A (en) * | 2000-09-20 | 2003-01-22 | 松下电器产业株式会社 | Video device and video display method |
| KR20060125353A (en) * | 2005-06-02 | 2006-12-06 | 주식회사 대우일렉트로닉스 | Device and method for switching osd language on the multisound receive system |
| CN102479491A (en) * | 2010-11-23 | 2012-05-30 | 汉王科技股份有限公司 | Dual-source liquid crystal display screen for on screen display and liquid crystal display device |
| CN203243440U (en) * | 2013-03-08 | 2013-10-16 | 珠海英图电子科技有限公司 | Video signal conversion apparatus for converting HDMI to VGA |
-
2015
- 2015-06-02 CN CN201510294583.8A patent/CN104935999A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020075256A1 (en) * | 2000-09-13 | 2002-06-20 | Nokia Multimedia Terminals Oy | Method and arrangement for synchronising on-screen display functions during analog signal reception |
| CN1393009A (en) * | 2000-09-20 | 2003-01-22 | 松下电器产业株式会社 | Video device and video display method |
| KR20060125353A (en) * | 2005-06-02 | 2006-12-06 | 주식회사 대우일렉트로닉스 | Device and method for switching osd language on the multisound receive system |
| CN102479491A (en) * | 2010-11-23 | 2012-05-30 | 汉王科技股份有限公司 | Dual-source liquid crystal display screen for on screen display and liquid crystal display device |
| CN203243440U (en) * | 2013-03-08 | 2013-10-16 | 珠海英图电子科技有限公司 | Video signal conversion apparatus for converting HDMI to VGA |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105681703A (en) * | 2016-01-19 | 2016-06-15 | 浪潮集团有限公司 | OSD chip compatible to multiple interfaces |
| CN108874276A (en) * | 2018-06-11 | 2018-11-23 | 山东超越数控电子股份有限公司 | A kind of system and method for realizing OSD menu function on VGA display |
| CN114371763A (en) * | 2020-10-14 | 2022-04-19 | 苏州佳世达电通有限公司 | Display device and operation method thereof |
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Application publication date: 20150923 |