CN1671180A - A video processor for LED full-color display screen - Google Patents
A video processor for LED full-color display screen Download PDFInfo
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- CN1671180A CN1671180A CN 200410016991 CN200410016991A CN1671180A CN 1671180 A CN1671180 A CN 1671180A CN 200410016991 CN200410016991 CN 200410016991 CN 200410016991 A CN200410016991 A CN 200410016991A CN 1671180 A CN1671180 A CN 1671180A
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Abstract
A video processor for LED all color screen, which contains video process main control module, microprocess unit, read only memory module and frame buffer module, signal interface, output interface module and communication interface, series communication module, power supply module and interface, wherein the microprocess unit respectively connected with ROM module and series communication module which is connected with communication interface, power supply module connected with power interface and providing power to all equipment, said invention reinforces display function.
Description
Technical field
The present invention relates to vision signal and handle and the image display technology field, particularly be applicable to video signal collective, processing and the Display Technique of LED colorful display screen.
Background technology
LED video full color display need carry out special disposal to vision signal before the displaying video image.Owing to still there be not image source and the standard thereof that is specifically designed to the LED full color display at present, therefore for a long time, this work is to be finished by the multimedia video card based on PC.Image video signal is handled through multimedia card, shows on computer display screen, and is sent to the LED display demonstration synchronously.
The shortcoming of multimedia video card is:
1) depend on the environment of computer: if without computer, video source signal just can't directly enter LED display and show that this is irrational.
2) vision signal is handled coarse: because the restriction of the function of multimedia card main control chip, vision signal is being converted to digital quantity from analog quantity, become the process of lining by line scan from interlacing scan, multimedia card has only been finished basic translation function, make its Presentation Function and picture quality of being reproduced on the LED display on treatment of details, still have many deficiencies, such as: the A/D conversion accuracy is low; The enhancement process function that lacks multiple dynamic image quality such as dynamic instantaneous light emission compensation, dynamic colourity improvement; There is not the screen superposition function of text/image etc.
3) be unsuitable for upgrading: because multimedia card is not to specialize in the parts product that LED display uses, so the application development requirement of incompatibility LED display, software is difficult for upgrading, makes its function lag significantly behind market demand development.
4) there is some congenital circuit design defective in the main control chip that the multimedia card that has adopts, also can impact for for no reason the LED display quality.
Also there is the dedicated video card that is applicable to LED display to come out in recent years, for example: the JMC-LED dedicated video card of Beijing milky way computer company exploitation.But still exist such as depend on computer, the rgb signal gray scale is regulated performance drawbacks on the low side such as progression or A/D conversion accuracy, and image detail handles the influence that is subjected to main control chip, function is also perfect not to the utmost.
Summary of the invention
The object of the present invention is to provide a kind of video processor that can significantly improve the picture display quality of LED full color display, make the Video processing of LED full color display no longer depend on computer, to remedy the defective that multimedia card exists.
A kind of video processor that is used for the LED full color display provided by the present invention, comprise Video processing main control module, microprocessing unit, read-only storage module and frame buffer module, signaling interface, output interface module and communication interface, serial communication modular, power module and power interface, it is characterized in that:
Described Video processing main control module respectively with described signaling interface, output interface module, frame buffer module, microprocessing unit links to each other, described microprocessing unit links to each other with serial communication modular with read-only storage module respectively, described serial communication modular links to each other with communication interface, described power module with after power interface links to each other respectively to the Video processing main control module, frame buffer module, microprocessing unit, output interface module, read-only storage module, the serial communication modular power supply, wherein: the Video processing main control module, by the various video analog signals of signaling interface reception different systems, carry out pattern of the input and select, automatic gain control (AGC), 10 digital video analog-to-digital conversion (ADC), the comb filtering decoding, according to clock and row, field sync signal is stored the data division processing, and interlacing becomes line by line, edge smooth treatment and 14D dynamic image enhancement function, processing such as γ correction; Frame buffer module, receiver, video is handled the digital processing signal through division processing in the main control module, for Video processing main control module read/write access; Microprocessing unit, pass through serial communication modular, the received communication interface is sent system's configuration information of relevant video and is handled, microprocessing unit (MCU) can also be from the graph text information of communication interface reception with the screen superposition, and information delivered to the Video processing main control module, the digital video signal of lining by line scan that after multiple processed, produces, perhaps the picture and text screen superposition signal of Chu Xianing is exported by output interface module; Serial communication modular in order to finish the level conversion between communication interface and the microprocessing unit, realizes that serial received/transmission drives function; Read-only storage module, the memory memory as microprocessing unit is used for storage system data and little handling procedure.
Adopted above-mentioned technical scheme, actual demand according to LED full color display Video processing, select powerful Video processing main control module for use, interlacing analog signal processed from various video source is become to have R, G, each 8bit of B, the digital signal of lining by line scan of 256 grades of gray-scale Control, drive demonstration for the LED full color display, simultaneously to have realized the enhancement process function that picture and text screen superposition and other multiple dynamic images show in the screen display mode.The present invention compares with the video processor (or card) that other LED displays use, not only improved the universality of product, Presentation Function is enhanced, improved the LED display quality, and make the Video processing of LED display no longer depend on computer, the system integration, upgrading and the function of being more convenient for expanded, and also therefore improved the combination property price ratio of LED video display screen systems.
Description of drawings
Fig. 1 is the theory diagram of LED full color display dedicated video processor of the present invention.
Embodiment
As shown in Figure 1, the present invention, be a kind of video processor of the LED of being used for full color display, comprise Video processing main control module 1, microprocessing unit 2, read-only storage module 3 and frame buffer module 4, signaling interface 5, output interface module 6 and communication interface 7, serial communication modular 8, power module 10 and power interface 9.
Video processing main control module 1 links to each other with signaling interface 5, output interface module 6, frame buffer module 4, microprocessing unit 2 respectively, microprocessing unit 2 links to each other with serial communication modular 8 with read-only storage module 3 respectively, serial communication modular 8 links to each other with communication interface 7, power module 10 with after power interface 9 links to each other respectively to Video processing main control module 1, frame buffer module 4, microprocessing unit 2, output interface module 6, read-only storage module 3, serial communication modular 8 power supplies.
Video processing main control module 1, by signaling interface 5 receiver, video analog signals, carry out that pattern of the input is selected, automatic gain control (AGC), 10 digital video analog-to-digital conversion (ADC), comb filtering decoding, according to clock and row, field sync signal to storage of data division processing and interlacing become line by line, edge smooth treatment and processing such as 14D dynamic image enhancement function, γ correction.The model that this Video processing main control module 1 can adopt Trident company to produce is the integrated chip of DPTV-3D.
Microprocessing unit (MCU) 2, by serial communication modular (8), received communication interface 7 is sent system's configuration information of relevant video and is handled, MCU microprocessing unit 2 can also be from the graph text information of communication interface (RS-232) 7 receptions with the screen superposition, and information delivered to Video processing main control module 1, the digital video signal of lining by line scan that produces after multiple processed, perhaps the picture and text screen superposition signal of Chu Xianing is by output interface module 6 outputs.The model that this microprocessing unit 2 can adopt Winbond company to produce is the integrated chip of 78E52.
Serial communication modular 8 in order to finish the level conversion between communication interface (7) and the microprocessing unit (2), realizes that serial received/transmission drives function.The model that this serial communication modular 8 can adopt Maxim company to produce is the integrated chip of MAX202E.
The model that read-only storage module 3 can adopt Atmel company to produce is the integrated chip of AT24C56.
Workflow of the present invention:
Desiring the video source that shows on the LED colorful display screen, is various analog video signals.Signaling interface 5 of the present invention provides S-Video, YC
bCr and two composite video signal ports, to receive corresponding signal to be processed, and support NTSC (abbreviation of the National Television SystemsCommittee of the American National television system committee is called quadrature amplitude balance system), PAL (abbreviation of alternation line by line of Phase Alternation Line phase place) and SECAM (French Sequential Couleur a Memoire transmits abbreviation colored and storage in proper order) standard.
Video processing main control module 1 available programs mode realizes the selection of different pattern of the inputs, and the video analog signal of choosing is controlled through automatic gain, converts digital quantity to by 10 analog-to-digital conversion ADC, after decoding brightness, colourity is separated; According to clock and row, field sync signal data are carried out division processing and deposited frame buffer module 4 in, call for showing in real time; The digital video signal that shows as key frame is before for output, handle by further key frame, comprise become interlacing into line by line, edge smooth treatment and 14D dynamic image enhancement function, further to improve and to strengthen its display quality, after handling (γ correction), high vision exports the digital video signal that the three primary colors RGB that lines by line scan has each 256 grades of gray-scale Control then from output interface module 6.
For making things convenient for the demonstration debugging of LED display, simultaneously through the conversion of 10 figure place moulds, the analog quantity of output RGB is used as the debugging supervisory signal for external display.
MCU2 is one eight bit microprocessor, it and electrically erasable read-only memory E
2PROM connects, and accepts the system's configuration information (as screen size, standard, contrast, brightness, saturation etc.) from RS-232 communication interface 7.Desire the non-video text graphic information of superposition on key frame and also pass through communication interface 7 and MCU 2, mail to Video processing main control module 1 and handle.
For the non-video image, text and data (being called osd data) of desiring superposition, MCU 2 can deposit it in the frame buffer module 4 OSD memory by Video processing main control module 1.When frame buffer 4 arranged this superposition to show, new osd data can write another OSD storage zone of frame buffer 4, is provided with the back and shows.MCU 2 can be that also superposition shows selected screen area, and plane convergent-divergent adjustment can be done in screen superposition zone, the superposition content displayed can be in this zone about turnup.
The non-video image, text and data shows through OSD to be handled, and mixes from the final picture signal of output channel 6 outputs with the key frame superposition and as α.Wherein α mix be with the non-video graph text information with transparent, translucent or opaque mode superposition is on key frame, to realize higher definition and resolution, perfect prospect and the background that embodies picture.
Effect behind enforcement the present invention shows:
1,24 of output line by line digital signal realize every kind of primary colours 8bit, 256 grades of gray scale display capabilities;
2, support NTSC, PAL, various standards such as SECAM;
3, utilize VBI (Vertical Blank Interval) industrial standard, for video pictures increases closed caption; Realized the screen superposition function of character and graphic and video pictures;
4, have senior image processing such as γ correction and α mixing;
5,10 ADC analog-digital conversion function;
6, the output display frame of maximum support 1280 * 768;
7, support 14 kinds of dynamic image enhancement function (being called for short 14D):
1) dynamic brightness is improved
2) dynamically colourity is improved
3) dynamic scan speed regulation
4) dynamic digital comb filtering
5) dynamically adapting progressive signal static instrumentation
6) dynamic frame filters noise reduction process
7) dynamically γ control
8) dynamically black level adjustment
9) dynamic brightness/contrast adjustment
10) dynamic frame/scan rate conversion
11) dynamically adapting smothing filtering
12) dynamically white peak restriction
13) dynamic brightness is surveyed
14) dynamic digital SVGA superposition
Claims (1)
1. video processor that is used for the LED full color display, comprise Video processing main control module (1), microprocessing unit (2), read-only storage module (3) and frame buffer module (4), signaling interface (5), output interface module (6) and communication interface (7), serial communication modular (8), power module (10) and power interface (9), it is characterized in that:
Described Video processing main control module respectively with described signaling interface (5), output interface module (6), frame buffer module (4), microprocessing unit (2) links to each other, described microprocessing unit (2) links to each other with serial communication modular (8) with read-only storage module (3) respectively, described serial communication modular (8) links to each other with communication interface (7), described power module (10) with after power interface (9) links to each other respectively to Video processing main control module (1), frame buffer module (4), microprocessing unit (2), output interface module (6), read-only storage module (3), serial communication modular (8) power supply, wherein:
Video processing main control module (1), receive the various video analog signals of different systems by signaling interface (5), carry out pattern of the input selections, automatic gain control, 10 digital video analog-to-digital conversion, comb filtering decoding, according to clock and row, field sync signal to the storage of data division processing and interlacing change line by line, the processing of edge smooth treatment and 14D dynamic image enhancement function, γ correction;
Frame buffer module (4), receiver, video is handled the digital processing signal through division processing in the main control module (1), for Video processing main control module (1) read/write access;
Microprocessing unit (2), by serial communication modular (8), received communication interface (7) is sent system's configuration information of relevant video and is handled, microprocessing unit (2) can also be from the graph text information of communication interface (7) reception with the screen superposition, and information delivered to Video processing main control module (1), the digital video signal of lining by line scan that after multiple processed, produces, perhaps the picture and text screen superposition signal of Chu Xianing is exported by output interface module (6);
Serial communication modular (8) in order to finish the level conversion between communication interface (7) and the microprocessing unit (2), realizes that serial received/transmission drives function;
Read-only storage module (3), the memory memory as microprocessing unit (2) is used for storage system data and little handling procedure.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410016991 CN1671180A (en) | 2004-03-17 | 2004-03-17 | A video processor for LED full-color display screen |
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| CN 200410016991 CN1671180A (en) | 2004-03-17 | 2004-03-17 | A video processor for LED full-color display screen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461827C (en) * | 2006-07-06 | 2009-02-11 | 深圳帝光电子有限公司 | Video control LED backlight and its control method |
| CN101944326A (en) * | 2010-09-09 | 2011-01-12 | 杭州士兰微电子股份有限公司 | LED display screen control chip and control method thereof |
-
2004
- 2004-03-17 CN CN 200410016991 patent/CN1671180A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100461827C (en) * | 2006-07-06 | 2009-02-11 | 深圳帝光电子有限公司 | Video control LED backlight and its control method |
| CN101944326A (en) * | 2010-09-09 | 2011-01-12 | 杭州士兰微电子股份有限公司 | LED display screen control chip and control method thereof |
| CN101944326B (en) * | 2010-09-09 | 2012-07-04 | 杭州士兰微电子股份有限公司 | LED display screen control chip and control method thereof |
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