CN100357877C - Screen display control method - Google Patents
Screen display control method Download PDFInfo
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- CN100357877C CN100357877C CNB021024944A CN02102494A CN100357877C CN 100357877 C CN100357877 C CN 100357877C CN B021024944 A CNB021024944 A CN B021024944A CN 02102494 A CN02102494 A CN 02102494A CN 100357877 C CN100357877 C CN 100357877C
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Abstract
The present invention relates to a method for controlling OSD (on screen display). The present invention comprises: a display buffer is used for storing the data of a picture, and the display buffer is corresponding to a display picture; a storage is used for storing the data of an OSD, and a display picture corresponding to the storage comprises an OSD picture; a data processing method is used for writing OSD data into a temporary storage unit corresponding to the OSD picture of the display buffer.
Description
Technical field
The invention relates to a kind of screen show (on screen display, OSD) control method, particularly relevant for a kind of OSD of storage data in display register to reach the method for setting up the OSD viewing area.
Background technology
But OSD is the display frame parameter usually, provide the user to do further adjustment, common person such as brightness color code (hue), brightness (brightness), saturation degree (saturation), contrast (contrast), horizontal size (H-size), horizontal level (H-phase), vertical size (V-size), vertical centre (V-center), pincushion shape (pin-cushion) or the like.
Because the kind of computer graphic data and video data is more and more, and the condition that control is selected is also complicated more, make the hardware circuit (hardware circuit) of controlling OSD must promote circuit complexity relatively, with the deposited user demand of the OSD of hardware circuit guiding.
Fig. 1 represents the display of the known OSD of having Presentation Function.In Fig. 1, R (red), G (green), B (blue) represent the tricolor signal that transmitted by picture frame working storage 110 respectively, and this is the signal of video signal that institute's desire shows under the normal condition.Under general show state, R, G, B signal are sent into display panel 170 by mixer 130 and output buffer 160.The signal that wherein is used for controlling the video picture position comprises horizontal-drive signal (horizontal synchronizing signal) HSYNC and vertical synchronizing signal (vertical synchronizing signal) VSYNC.Horizontal-drive signal HSYNC and vertical synchronizing signal VSYNH are a kind of pulse wave signals, horizontal-drive signal HSYNH pulse wave is shorter at interval, in order to define each bar horizontal scanning line, vertical synchronizing signal VSYNC pulse wave is longer at interval, comprises the picture frame of a plurality of horizontal scanning lines in order to definition.
When the user triggered the OSD Presentation Function, microcontroller promptly read character data to display from EEPROM in the display, delivered in the osd circuit 120, produced tristimulus signal Rosd (red), Gosd (green), the Bosd (indigo plant) of corresponding this OSD viewing area.As shown in the figure, osd circuit 120 is sent Rosd, Gosd, Bosd signal and blanking signal BLANK into mixer 130 in the lump.Blanking signal BLANK is used for defining OSD viewing area scope on fluorescent screen, that is, when blanking signal BLANK=1 represents that the zone that is showing at present is normal viewing area, mixer can cut out the character data of Rosd, Gosd, Bosd, and by R, G, B signal inputoutput buffer 160; Represent just to be the OSD viewing area in the viewing area at present as blanking signal BLANK=0, mixer can cut out R, G, B signal, and by Rosd, Gosd, Bosd character data inputoutput buffer 160.Blanking signal BLANK is decided by the relative timing relation of OSD gating circuit 180 according to horizontal-drive signal HSYNC and vertical synchronizing signal VSYNC.That is to say that nationality defines corresponding OSD viewing area by the decision scanning line range.Illustrate, if the 240th sweep trace is defined as the reference position of OSD viewing area and high 120 sweep traces in OSD viewing area; Then OSD gating circuit 180 can occur beginning calculating from vertical synchronizing signal VSYNC, calculates the 240th scanning position, begins to export blanking signal BLANK=0, to the 360th scanning position, begins to export blanking signal BLANK=1.
Yet, when multiple OSD data, known hardware osd circuit just lacks use elasticity, expend very much hardware circuit, when cost of manufacture also increases thereupon, above-mentioned known OSD method is by particular electrical circuit, as random-access memory (ram), the read only memory (ROM) record OSD data, nationality is by the time of occurrence of calculated level synchronizing signal and vertical synchronizing signal, output OSD data realizes the OSD viewing area, and the method for this hardware circuit guiding is applied in when showing multiple OSD simultaneously, can't provide various use patterns, as synthetic alpha-blended of A Erfa or color keying color-keying are provided in the OSD viewing area.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of application-oriented OSD control.
According to above-mentioned purpose, the present invention proposes the method for a kind of OSD of control, comprising: utilize a display buffer, in order to store a picture data, its corresponding display frame; Utilize a storer, store an OSD data, its corresponding above-mentioned display frame comprises an OSD picture; Utilize a data processing method, write above-mentioned OSD data pairing temporary storage location of above-mentioned OSD picture in above-mentioned display buffer, and display frame not corresponding temporary storage location in above-mentioned fluorescent screen remains unchanged.
Wherein above-mentioned data processing method is that direct block is moved.
Wherein above-mentioned data processing method can also be that video signal is overlapping.
A kind of method of controlling OSD, it comprises the following steps:
Judge whether activation of osd function;
If above-mentioned osd function activation judges then whether the OSD data changes in the storer;
If above-mentioned OSD data changes, then judge the overlapping whether activation of video signal;
If the overlapping activation of above-mentioned video signal is then set direct block and is moved flag;
Move with direct block and to duplicate above-mentioned OSD data pairing temporary storage location of OSD picture in a display buffer, and display frame corresponding temporary storage location in above-mentioned fluorescent screen remains unchanged;
If the overlapping disabled of above-mentioned video signal is provided with the overlapping form of video signal;
The overlapping working storage of one video signal is set;
Make and the overlapping activation of above-mentioned video signal show above-mentioned OSD picture;
If above-mentioned osd function disabled is then judged the overlapping whether activation of above-mentioned video signal;
If the overlapping activation of above-mentioned video signal makes the overlapping disabled of above-mentioned video signal;
Remove the overlapping flag of above-mentioned video signal;
If the overlapping disabled of above-mentioned video signal; Judge that then direct block moves whether activation;
If directly block is moved activation, then restore the above-mentioned picture data of the pairing temporary storage location of above-mentioned OSD picture in the above-mentioned display buffer; And
Remove above-mentioned direct block and move flag.
Description of drawings
Fig. 1 represents the display of the known OSD of having Presentation Function.
Fig. 2 represents to move the block schematic diagram of realizing OSD with direct block in the present embodiment.
Fig. 3 represents in the present embodiment block schematic diagram with the overlapping realization of video signal OSD.
Fig. 4 represents the process flow diagram of OSD control method in the present embodiment.
Embodiment
Display OSD function control method of the present invention, mainly be to duplicate the OSD content in display buffer, the number of OSD form no longer is subject to the number of carrying out osd circuit, OSD can more resilient execution, driver is resilient to duplicate in the storer OSD in display buffer, and known direct block is moved (bitblock transfer bitblt) and video signal overlapping (video overlay) and can be used and need specific osd circuit in the method and not.For making presenting of OSD more diversified, can use more kinds of direct blocks and move with video signal and be overlapped in this method.Another advantage of this method is to utilize existing hardware configuration to finish, and does not need to increase new hardware.
Fig. 2 represents to move the block schematic diagram of realizing OSD with direct block in the present embodiment.As shown in Figure 2, basically, the interface card 100 of carrying out OSD comprises storer 40,42 display buffers 20, microcontroller 30.Storer the 40, the 42nd is used for storing the OSD content.The device of display frame then comprises display screen 60, display driver circuit 50.
Fig. 3 represents in the present embodiment block schematic diagram with the overlapping realization of video signal OSD.As shown in Figure 3, basically, the interface card 100 of carrying out OSD comprises storer 40,42 display buffers 20, microcontroller 30.Storer the 40, the 42nd is used for storing the OSD content.The overlapping working storage 32 of video signal is in order to store overlapping needed display parameter of video signal such as form control, color control, colourity control etc.The device of display frame then comprises display screen 60, display driver circuit 50.
Fig. 4 represents the process flow diagram of OSD control method in the present embodiment, that is in microcontroller 30 process flow diagram of control program.In Fig. 4, at first, microcontroller 30 judges that whether OSD is in enabled status, shown in S20, if OSD is in enabled status, shown in S21, judge then whether the OSD content needs to upgrade, shown in S22, then upgrade the OSD content if desired, shown in S23, otherwise judge that video signal is overlapping whether in enabled status, shown in S24, if video signal overlapping be enabled status, direct block then is set moves flag, shown in S25, move by direct block, duplicate the OSD content of storer 40,42 and be stored among the display buffer 20, shown in S26.If video signal is overlapping is not enabled status, and the overlapping flag of video signal then is set, and shown in S27, the overlapping form of video signal is set, and shown in S28, the overlapping working storage of video signal is set, and shown in S29, makes the overlapping OSD of providing of video signal, shown in S30.
If OSD is at the disabled state, then judge whether to have used video signal overlapping, shown in S31, if used video signal overlapping, then eliminate the overlapping enabled status of video signal, shown in S32, eliminate the overlapping flag of video signal, shown in S33,, then judge whether to use direct block to move if do not use video signal overlapping, shown in S34, if used direct block to move, then restore in the display buffer 20 the picture display data that direct block is moved the temporary storage location that uses, shown in S35, remove direct block and move flag, shown in S36, reply general picture display operation, shown in S37.
For the demonstration that makes OSD more diversified, more flexible, directly block is moved, video signal is overlapping can to use how different two dimensions, and for example the synthetic direct block of A Erfa is moved alpha-blended bitblt, transparent direct block is moved transparent bitblt, color keying color keying etc.
Though the present invention discloses as above with a preferred embodiment, so it is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention, and when doing a little change and retouching.Therefore protection scope of the present invention is defined by claims.
Claims (5)
1. control the method that the fluorescent screen shows for one kind, comprising:
Utilize a display buffer, in order to store a picture data, its corresponding display frame;
Utilize a storer, store a fluorescent screen display data, its corresponding above-mentioned display frame comprises a fluorescent screen display frame;
Utilize a data processing method, write above-mentioned fluorescent screen display data display frame pairing temporary storage location in above-mentioned fluorescent screen in above-mentioned display buffer, and display frame not corresponding temporary storage location in above-mentioned fluorescent screen remains unchanged.
2. a kind of method that the fluorescent screen shows of controlling as claimed in claim 1, wherein above-mentioned data processing method is that direct block is moved.
3. a kind of method that the fluorescent screen shows of controlling as claimed in claim 1, wherein above-mentioned data processing method is that video signal is overlapping.
4. a kind of method that the fluorescent screen shows of controlling as claimed in claim 1, it comprises the following steps:
Judge whether activation of osd function;
If the Presentation Function activation of above-mentioned fluorescent screen judges then whether the fluorescent screen display data changes in the above-mentioned storer;
If above-mentioned fluorescent screen display data changes, then judge the overlapping whether activation of video signal;
If the overlapping activation of above-mentioned video signal is then set direct block and is moved flag;
Move with direct block and to duplicate above-mentioned fluorescent screen display data display frame pairing temporary storage location in above-mentioned fluorescent screen in above-mentioned display buffer;
If the overlapping disabled of above-mentioned video signal is provided with the overlapping flag of video signal;
The overlapping form of video signal is set;
The overlapping working storage of video signal is set;
Make and the overlapping activation of above-mentioned video signal show the display frame of above-mentioned fluorescent screen;
If above-mentioned fluorescent screen Presentation Function disabled is then judged the overlapping whether activation of above-mentioned video signal;
If the overlapping activation of above-mentioned video signal makes the overlapping disabled of above-mentioned video signal;
Remove the overlapping flag of above-mentioned video signal;
If the overlapping disabled of above-mentioned video signal judges that then direct block moves whether activation;
If directly block is moved activation, then restore the above-mentioned picture data of the pairing temporary storage location of above-mentioned fluorescent screen display frame in the above-mentioned display buffer; And
Remove above-mentioned direct block and move flag.
5. control the method that the fluorescent screen shows for one kind, it comprises the following steps:
Judge the whether activation of fluorescent screen Presentation Function;
If the Presentation Function activation of above-mentioned fluorescent screen judges then whether the fluorescent screen display data changes in the storer;
If above-mentioned fluorescent screen display data changes, then judge the overlapping whether activation of video signal;
If the overlapping activation of above-mentioned video signal is then set direct block and is moved flag;
Move with direct block and to duplicate above-mentioned fluorescent screen display data display frame pairing temporary storage location in fluorescent screen in a display buffer, and do not change the corresponding temporary storage location of fluorescent screen display frame;
If the overlapping disabled of above-mentioned video signal is provided with the overlapping form of video signal;
The overlapping working storage of one video signal is set;
Make and the overlapping activation of above-mentioned video signal show the display frame of above-mentioned fluorescent screen;
If above-mentioned fluorescent screen Presentation Function disabled is then judged the overlapping whether activation of above-mentioned video signal;
If the overlapping activation of above-mentioned video signal makes the overlapping disabled of above-mentioned video signal;
Remove the overlapping flag of above-mentioned video signal;
If the overlapping disabled of above-mentioned video signal; Judge that then direct block moves whether activation;
If directly block is moved activation, then restore the above-mentioned picture data of the pairing temporary storage location of above-mentioned fluorescent screen display frame in the above-mentioned display buffer; And
Remove above-mentioned direct block and move flag.
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CNB021024944A CN100357877C (en) | 2002-01-21 | 2002-01-21 | Screen display control method |
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CN100357877C true CN100357877C (en) | 2007-12-26 |
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CN101419781B (en) * | 2007-10-25 | 2011-06-22 | 中兴通讯股份有限公司 | Graphics display method and device for video control system on embedded terminal |
JP2017169086A (en) * | 2016-03-17 | 2017-09-21 | セイコーエプソン株式会社 | Display device, control method for display device, and program |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1014713A1 (en) * | 1998-12-21 | 2000-06-28 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for providing OSD data for OSD display in a video signal having an encoded format |
EP1110385A1 (en) * | 1999-06-30 | 2001-06-27 | Koninklijke Philips Electronics N.V. | Video processing |
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1014713A1 (en) * | 1998-12-21 | 2000-06-28 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for providing OSD data for OSD display in a video signal having an encoded format |
EP1110385A1 (en) * | 1999-06-30 | 2001-06-27 | Koninklijke Philips Electronics N.V. | Video processing |
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