CN1878239A - Image quality improving apparatus utilizing auto-regulation gain for image device - Google Patents
Image quality improving apparatus utilizing auto-regulation gain for image device Download PDFInfo
- Publication number
- CN1878239A CN1878239A CN 200510046605 CN200510046605A CN1878239A CN 1878239 A CN1878239 A CN 1878239A CN 200510046605 CN200510046605 CN 200510046605 CN 200510046605 A CN200510046605 A CN 200510046605A CN 1878239 A CN1878239 A CN 1878239A
- Authority
- CN
- China
- Prior art keywords
- signal
- image
- level
- picture
- maximum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Picture Signal Circuits (AREA)
Abstract
The invention discloses an image quality improving device of image equipment to reproduce the same image brightness without relating input signal kind through automate adjusting gain, which comprises the following parts: signal transformation part, image signal disposal part and system control part, wherein the signal transformation part transforms outer received image signal into digital signal; the image signal disposal part adjusts gain of digital image signal, which disposes the gain into signal level with maximum output; the system control part controls image signal disposal part, which outputs image signal at maximum signal level. The invention provides highest image quality without adjusting brightness, which is convenient to operate for user.
Description
Affiliated technical field
The present invention relates to a kind of image documentation equipment; Especially utilize regulate automatically that same picture brightness is reproduced in gain and with the picture quality improving apparatus of the irrelevant image documentation equipment of input signal kind.
Background technology
Usually, television set is designed to a kind of by tuner received RF broadcast singal, carries out the broadcasting of demodulation audiovisual surface wave then, meanwhile also is used for the multiple Voice ﹠ Video signal that audiovisual receives from the outside.
Now, along with television system utilize the scope constantly to obtain enlarging and advanced, offer TV from various sources, as radio frequency, Voice ﹠ Video, the S-video, composite signal, RGB-personal computer, the RGB-Digital Television, DVI (Digital Video Interactive)-Digital Television, the DVI-personal computer, HDMI etc. are with multiple input pattern received signal.
Decoder and analog/digital converter spare that the various picture signals of the inner reception of television system are handled, most of output digital signal offers next step video process apparatus, and the sort signal transformation device is different separately along with different input sources.
In addition, except the signal transforming device of decoder or analog/digital converter spare separately the difference, the signal magnitude that may be input to them is also all different.
That is to say, signal by the reception of various sources, as: by the radiofrequency signal of tuner reception, AV signal from the reception of external audio video equipment, from the personal computer signal of personal computer reception, from the composite signal of outside DVD reception, and the DVI signal etc., along with the product difference that connects, the size of its signal is also all different.
Even if the signal magnitude of input is identical, but along with using which type of decoder or analog/digital converter spare the digital signal size of its output, may be just different; Therefore the output size that receives by video process apparatus will will be different along with the peak value of different its white levels of input source.
Certainly, the input size of each input source is all being stipulated the scope of signal level, varies in size but problem is the mould/number output between the input source.
Although all received identical 0.7V white signal, different input sources, their mould/transformation of variables output size is also different, under the situation of TV or AV signal, its digital value is 235, is 250 under the situation of composite signal, is 235 or 255 under the situation of DVI; Equally, received identical 0V black signal, pressed the input source difference, its mould/transformation of variables output size is also had any different.
In sum, traditional television system exists following problem, that is:
The first, because the signal magnitude of the image input source of input is different separately, although perhaps the signal magnitude of image input source is identical, but in television system inside, mould/transformation of variables output is different, and therefore the image brightness of exporting on picture is different along with the difference of input source.
That is to say,, therefore can not reproduce best white peak, perhaps export identical image brightness because along with the picture signal kind difference of importing, its maximum white level is also different with black level.
The second, because different input sources, its picture brightness is also different, so the user will go to adjust the brightness of image in case of necessity in person according to the state of picture, and is pretty troublesome.
Summary of the invention
The present invention develops in order to address the above problem, and its purpose is to provide a kind of and utilizes automatic adjusting gain to realize best peak white and identical image brightness, and with the picture quality improving apparatus of the irrelevant image documentation equipment of the signal kinds of input.
In order to achieve the above object, the present invention utilizes the picture quality improving apparatus of the image documentation equipment of automatic adjusting gain, and have following structure: be provided with signal transformation portion, the image signal transformation that is used for receiving from the outside becomes digital signal; Be provided with the picture signal handling part, be used for adjusting gain, and it is processed into the maximum signal level of output from the data image signal of signal transformation portion output; Be provided with systems control division, be used for control chart image signal handling part, allow it that the picture signal of current input is exported with the signal level of maximum.
The above-mentioned picture signal that receives from the outside, is exported with simulation or digital form the maximum white level and the black level signal that show in the invalid interval of picture signal for the image output device of each input source is provided.
Above-mentioned picture signal handling part for the picture signal that will receive from the outside, is exported with the maximum signal level that image documentation equipment can be exported, and the view data with the view data conversion input source of maximum forms a plurality of look-up tables of formization with this.
Above-mentioned systems control division, the maximum white level and the black level of reception picture signal, control chart image signal handling part allows it select corresponding to the input source look-up table with maximum white level and black level that is transfused to then.
Beneficial effect of the present invention is:
The first, irrelevant with the kind of picture signal, owing to can reproduce best white peak, therefore can provide the highest image quality.
The second, irrelevant with the kind of picture signal, owing to can realize identical picture brightness, do not need to adjust separately brightness, therefore can provide convenience for the user.
Description of drawings
Fig. 1 a and Fig. 1 b are the picture signal state diagrams that contains maximum white level and black level information.
Fig. 2 is the structured flowchart of the picture quality improving apparatus of the present invention's image documentation equipment of utilizing automatic adjusting gain.
Fig. 3 is the structured flowchart that contains the picture signal handling part of a plurality of look-up tables in order to regulate gain automatically.
Fig. 4 is the curve chart of Data Matching between expression input signal and the look-up table.
Among the figure:
10: signal transformation portion 20: multiplexer
30: picture signal handling part 31: frame buffer
32: output control part 33: look-up table
40: systems control division
Embodiment
Other purpose of the present invention, characteristics and advantage describe in detail with reference to drawings and Examples.
Below, illustrate that with reference to drawings and Examples the present invention utilizes the picture quality improving apparatus of the image documentation equipment of automatic adjusting gain.
The invention is characterized in that utilizing numeral to regulate the method that gains automatically reproduces best peak white, and irrelevant with the kind of input signal.
In order to realize this requirement, in the image output device of various input sources is provided, 2～3 pulse signals of the maximum white level of representative image signal output reference and black level are inserted between non-effective image area, rather than (Fig. 1 a) effectively sending between image area.That is to say, the pulse signal of maximum white level of representative and black level is exported with analog signal.
In addition, at non-valid interval,, send black level and peak white digital signal value (Fig. 1 b) just at vertical blanking period.
The present invention utilizes the picture quality improving apparatus of the image documentation equipment of automatic adjusting gain, and as shown in Figure 2, be made up of following structure: be provided with signal transformation portion 10, the various image signal transformations that are used for receiving from the outside become digital signal; Be provided with multiplexer (MUX) 20, be used for from the data image signal of signal transformation portion 10 outputs,, exporting the corresponding digital picture signal selectively according to user's model selection; Be provided with picture signal handling part 30, be used for adjusting gain, make the maximum signal level of its output from the data image signal of multiplexer 20 outputs; Be provided with systems control division 40, be used for control chart image signal handling part 30, allow it that the picture signal of current input is exported with the signal level of maximum.
Picture signal handling part 30 is made of following several sections: being provided with frame buffer 31, being used for to the data image signal from multiplexer 20 outputs, is that unit stores temporarily with the frame; Be provided with output control part 32, be used for the level and the vertical synchronizing signal of data image signal according to input, the output that comes the control chart image signal; To be provided with look-up table 33, to be used for picture signal in order receiving, export with the maximum signal level that image documentation equipment can be exported, the view data with the view data conversion input source of maximum forms formization with this.
Below, describe the picture quality improving apparatus course of work that the present invention with said structure utilizes the image documentation equipment of automatic adjusting gain in detail.
At first, each picture signal from the outside input, transformation component by separately is transformed into digital signal respectively, as: radio frequency and AV signal, by first 10a of signal transformation portion (such as ntsc decoder), and composite signal is passed through secondary signal transformation component (such as the A/D transformation component) 10b, and the DVI signal is by the 10n of n signal transformation portion (such as the DVI decoder).That is to say that the picture signal of each input source is transformed into after the data image signal line output again by different separately signal transformation portions 10 respectively.
At this moment, multiplexer 20 from the data image signal by 10 outputs of signal transformation portion, is selected the data image signal corresponding to the input pattern of user's selection, outputs to picture signal handling part 30 then; Simultaneously, transmit white level and the black level that is included in the maximum in the picture signal to systems control division 40.
In addition, systems control division 40 becomes maximum signal level for the picture signal that realizes current input, according to the white level and the black level of the maximum of exporting from multiplexer 20, control chart image signal handling part 30; And picture signal handling part 30 then according to the control of systems control division 40, is adjusted the gain of data image signal.
When adjusting the gain of data image signal, the course of work of picture signal handling part 30 is as follows.
As shown in Figure 3, picture signal handling part 30 is built-in with a plurality of look-up tables 33, and it is the view data each input source, and the view data (0～255) of the maximum that can export with image documentation equipment is carried out after the conversion, in addition a kind of look-up table of formization.
For instance, it has the look-up table 33 of each input source, and it is that handle has various level ranges, as: 0-219,0-235,16-235,16-250, each picture signal of level ranges such as 1-255 all is transformed into the view data of maximum signal level (0-255), then formization in addition.
At this moment, systems control division 40, by maximum white level and black level from multiplexer 20 inputs, can judge the level range of the picture signal of current input, and select the look-up table 33 of corresponding input source according to the result who judges, control chart image signal handling part 30 allows it adjust the gain of picture signal then.
Then, picture signal handling part 30 according to the control of systems control division 40, is the Path selection of image processing a look-up table 33 corresponding to the input source of current input.
In addition, by selected look-up table 33, the line output of going forward side by side from the maximum signal level (0-255) of each R/G/B digital data converting one-tenth of frame buffer 31 outputs.
For instance, if the picture signal of current input is the composite signal with 16-250 level range, so by look-up table 33 corresponding to the 16-250 input source, the data that the view data of 16 level are transformed to 0 level are exported, and the view data of 250 level are transformed into the view data output of 255 level.
From the R/G/B numerical data of frame buffer 31 outputs, through corresponding look-up table 33, can export final R/G/B numerical data with maximum signal level (0-255), perhaps can export with the R/G/B analogue data by after the D/A switch.
So, the present invention as shown in Figure 4, though be 0-219 from the data of frame buffer 31 output, the signal level of 0-235 can be exported the signal level (0-255) of maximum by the look-up table 33 of corresponding input source.
That is to say, irrelevant with the kind of input signal, can both export with identical signal level range, to reproduce identical image brightness.
By the content of above-mentioned explanation, if the insider can know so that under the situation that does not break away from technological thought scope of the present invention multiple change and correction can be arranged.
And technical scope of the present invention is not limited on the foregoing description content, but should be limited by the claim scope of applying for a patent.
Claims (4)
1, a kind of picture quality improving apparatus that utilizes the image documentation equipment of automatic adjusting gain is characterized in that having following structure:
Be provided with signal transformation portion, the image signal transformation that is used for receiving from the outside becomes digital signal;
Be provided with the picture signal handling part, be used for adjusting gain, and it is processed into the maximum signal level of output from the data image signal of signal transformation portion output;
Be provided with systems control division, be used for control chart image signal handling part, allow it that the picture signal of current input is exported with the signal level of maximum.
2, the picture quality improving apparatus of the image documentation equipment of gain is regulated in utilization according to claim 1 automatically, it is characterized in that the described picture signal that receives from the outside is for during providing the image output device of each input source, the maximum white level and the black level signal that in the invalid interval of picture signal, show, export with simulation or digital form.
3, the picture quality improving apparatus of the image documentation equipment of gain is regulated in utilization according to claim 2 automatically, it is characterized in that described picture signal handling part, for the picture signal that will receive from the outside, export with the maximum signal level that image documentation equipment can be exported, view data with the view data conversion input source of maximum forms a plurality of look-up tables of formization with this.
4, the picture quality improving apparatus of the image documentation equipment of gain is regulated in utilization according to claim 3 automatically, it is characterized in that described systems control division, receive the maximum white level and the black level of picture signal, control chart image signal handling part allows it select corresponding to the input source look-up table with maximum white level and black level that is transfused to then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046605 CN1878239A (en) | 2005-06-09 | 2005-06-09 | Image quality improving apparatus utilizing auto-regulation gain for image device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510046605 CN1878239A (en) | 2005-06-09 | 2005-06-09 | Image quality improving apparatus utilizing auto-regulation gain for image device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1878239A true CN1878239A (en) | 2006-12-13 |
Family
ID=37510520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510046605 Pending CN1878239A (en) | 2005-06-09 | 2005-06-09 | Image quality improving apparatus utilizing auto-regulation gain for image device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1878239A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256084A (en) * | 2010-05-19 | 2011-11-23 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
| CN102256085A (en) * | 2010-05-21 | 2011-11-23 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
-
2005
- 2005-06-09 CN CN 200510046605 patent/CN1878239A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102256084A (en) * | 2010-05-19 | 2011-11-23 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
| CN102256084B (en) * | 2010-05-19 | 2013-03-06 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
| CN102256085A (en) * | 2010-05-21 | 2011-11-23 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
| CN102256085B (en) * | 2010-05-21 | 2013-01-23 | 北京创毅视讯科技有限公司 | Automatic gain control method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1240219C (en) | Receiver | |
| CN1165159C (en) | Method for displaying digital broadcasting signals through digital proadcasting receiver | |
| CN1874525A (en) | Picture display system for adjusting image quality of a picture signal having higher number of scanning lines | |
| CN1581943A (en) | Digital TV and channel setting method | |
| CN1890960A (en) | Display device and method of driving the same | |
| CN1330490A (en) | Multi-screen display equipment and multi-screen display method | |
| CN1960451A (en) | Broadcasting receiver, broadcasting transmitter, broadcasting system and control method thereof | |
| CN1878239A (en) | Image quality improving apparatus utilizing auto-regulation gain for image device | |
| CN102316246A (en) | Video process apparatus and method for processing video frequency | |
| CN1710942A (en) | Broadcast receiving apparatus having combined mode set-up function and method thereof | |
| CN1197354C (en) | System and method of beseband digital television | |
| CN1949841A (en) | Captions treater for image display and method thereof | |
| CN1913599A (en) | Media player and control method thereof | |
| CN1913581A (en) | Display apparatus to output an audio signal and method thereof | |
| CN101076101A (en) | Combination system and controlling method thereof | |
| CN100387057C (en) | Method and system of treatment television signal | |
| CN1220368C (en) | Controller and method for preventing repeated signal processing in signal processing system | |
| CN1956493A (en) | Multi-channel broadcast Tv signal receiving device | |
| CN1921603A (en) | Apparatus and method for performing image processor arrangement according to broadcast signals | |
| CN1893635A (en) | Digital video-frequency interface transmission device of set-top box and method therefor | |
| CN1893552A (en) | Video processing apparatus and video processing method | |
| CN1595972A (en) | Format conversion device | |
| CN1684509A (en) | Audio frequency processing device and method for digital TV set | |
| CN1143529C (en) | Channel entry for selection of a channel | |
| CN1324886C (en) | Processing device and method of digital video frequeney data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |