CN104702878B - Based on the method that OSD and Video signals are distinguished under HDMI agreements - Google Patents
Based on the method that OSD and Video signals are distinguished under HDMI agreements Download PDFInfo
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- CN104702878B CN104702878B CN201510091819.8A CN201510091819A CN104702878B CN 104702878 B CN104702878 B CN 104702878B CN 201510091819 A CN201510091819 A CN 201510091819A CN 104702878 B CN104702878 B CN 104702878B
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Abstract
A kind of method that OSD and Video signals are distinguished based on agreement under HDMI of present invention offer, including step are as follows：1), the signal of video signal of HDMI transmission is carried out to the division of block, signal type is marked by block；2), carry out the signal of video signal type of separator HDMI transmission using flag bit, Video and osd signal are subjected to separated processing on the premise of signal of video signal quality is not reduced；3), to being used to the flag bit of marking signal type, estimate its original image information using the pixel in neighborhood, further improve signal of video signal quality.According to the inventive method, it can will be transmitted after Video signals and osd signal fusion, reduce transmission bandwidth and data space；Video signals and osd signal are separately handled during image processing, it is ensured that good display result.
Description
Technical field
The present invention relates to display screen technology field, more particularly to it is a kind of be based on distinguishing under HDMI agreements OSD and
The method of Video signals.
Background technology
The display terminal that image plays can show two kinds of signals：Video signals and osd signal.Wherein Video signals are logical
Cross the external image vision signal that display device input interface receives；Osd signal be screen display include DVD player,
The image frames such as the television receiver processing setting menu signal related to display.In image frame display device, to input
Then some processing operations (such as frame per second is changed, the processing such as Color Gamut Mapping) of signal are, it is necessary to distinguish Video signals and osd signal
Optionally handled, the display result that just can ensure that.But if Video signals and osd signal are separately passed
Defeated storage, then very high requirement can be proposed to transmission bandwidth and data space, be unfavorable for hardware realization.
The content of the invention
The present invention is for technical problem present in above-mentioned prior art, there is provided one kind is based on distinguishing OSD under HDMI agreements
With the method for Video signals, transmission bandwidth and data space are reduced, it is ensured that good display result.
To reach above-mentioned purpose, the technical solution adopted in the present invention is as follows：
A kind of method that OSD and Video signals are distinguished under agreement based on HDMI, including step are as follows：
1), the signal of video signal of HDMI transmission is carried out to the division of block, signal type is marked by block；
2), carry out the signal of video signal type of separator HDMI transmission using flag bit, do not reduce signal of video signal quality
Under the premise of by Video and osd signal carry out separate processing；
3), to being used to the flag bit of marking signal type, estimate that its original image is believed using the pixel in neighborhood
Breath, further improve signal of video signal quality.
It is described 1) to be specifically：The HDMI signal of video signal transmitted is divided into the blocks of M × N sizes, wherein, each block will be by
One flag bit improves system processing speed to mark this block be Video signals or osd signal, it is assumed that image size is
Wd × Ht, then M, N value are the arbitrary values in 1~Wd, 1~Ht.
M, N value is even number.
M=N.
It is described 2) to be specifically：To each block, the bit i-bit of one of pixel is chosen as flag bit, is used for
Block corresponding to mark is Video signals or osd signal, 1~M of i values × N.
I=1.
It is described 3) to be specifically：Using neighborhood information come the signal of video signal of recovering mark position, in signal processing, contain
The pixel component of flag bit have lost the image information contained by itself, if do not repaired, can reduce signal of video signal quality,
Using the pixel in its a certain size neighborhood, the image information of its loss is solved using interpolation, is lifted and recovers signal of video signal
Quality.
Based on different size of contiguous range, using different interpolation algorithms.
Above-mentioned technical proposal of the present invention, it is caused to have the beneficial effect that：
According to the inventive method, it can will be transmitted after Video signals and osd signal fusion, reduce transmission bandwidth
And data space；Video signals and osd signal are separately handled during image processing, it is ensured that good display result.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is block schematic diagram in one embodiment of the invention；
Fig. 2 is current block and neighborhood block position view in one embodiment of the invention；
Fig. 3 is mark place value identical method schematic diagram in Fig. 2 embodiments；
Fig. 4 is the method schematic diagram for entering row interpolation solution to Fig. 3；
Fig. 5 is to indicate the different method schematic diagram of place value in Fig. 2 embodiments；
Fig. 6 is the method schematic diagram for entering row interpolation solution to Fig. 5.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill to this area
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection domain.
The method that OSD and Video signals are distinguished under the agreement provided by the present invention based on HDMI, embodiment as shown in Figure 1,
From the lowest bit position 1-bit of small component is contributed visual effect in 2 × 2 pieces of lower right corner pixel as flag bit, such as
In Fig. 1It is shown.If there is pixel to belong to osd signal in this 2 × 2 pieces, mark position 1, otherwise set to 0.
In shown in Fig. 1~Fig. 6,Represent the pixel of flag bit；Expression does not contain the pixel of flag bit；Represent
Neighborhood territory pixel for interpolation pixel to be solved.
Based on the pixel in neighborhood, interpolation, which solves the method containing flag bit pixel, is：Based on using current block as the upper left corner
The information of 2 × 2 neighborhood blocks of block, as shown in Fig. 2 wherein block C is current block, R/D/RD refer respectively to current block left/right/
The neighborhood block in the above/below/upper left corner/upper right corner/lower left corner/lower right corner.
If C, R, D, RD mark place value all same, as shown in figure 3, based on 3 centered on pixel to be solved in block C
× 3 Pixel Informations enter row interpolation；Otherwise, as shown in figure 5, entering row interpolation based on all pixels information in block C.
As shown in figure 4, the process for entering row interpolation using 3 × 3 neighborhood territory pixel information of pixel to be solved in block C is：First
Half-tone information based on 3 × 3 pixels calculates APL_8 and SAD_8, and (APL_8 is the gray average (average of 8 pixels of neighborhood
Pixel level), SAD_8 is the absolute difference and (sum of absolute of 8 pixels of neighborhood and pixel to be solved
difference)).Wherein Σ is that accumulation operations accord with, gkPixel k (k=0~7) grey decision-making is represented, gx is that pixel to be solved is false
If marker bit corresponding bit is the grey decision-making after 0；
Then according to a predetermined threshold value Th0, the interpolation result of final pixel to be solved is determined：
As shown in fig. 6, using in block C 2 × 2 pixel grey scale information, calculate APL_3 and SAD_3 (APL_3 represent be
The gray average of 3 pixels of neighborhood, SAD_3 represent 3 pixels of neighborhood and pixel to be solved absolute difference and)：
Then according to a predetermined threshold value Th1, it is resolved that the interpolation result of final pixel to be solved：
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow
Ring the substantive content of the present invention.
Claims (6)
1. the method for OSD and Video signals is distinguished under a kind of agreement based on HDMI, it is characterised in that as follows including step：
1), the HDMI signal of video signal transmitted is divided into the block of M × N sizes, wherein, each block will be marked by a flag bit
Remember that this block is Video signals or osd signal, improve system processing speed, it is assumed that image size is Wd × Ht, then M, N
Value is the arbitrary value in 1~Wd, 1~Ht, and signal type is marked by block；
2), carry out the signal of video signal type of separator HDMI transmission using flag bit, Video and osd signal are carried out to separate place
Reason；
3), to being used to the flag bit of marking signal type, its original image information is estimated using the pixel in neighborhood.
2. the method for OSD and Video signals is distinguished under the agreement according to claim 1 based on HDMI, it is characterised in that M,
N value is even number.
3. the method for OSD and Video signals is distinguished under the agreement according to claim 2 based on HDMI, it is characterised in that M
=N.
4. the method for OSD and Video signals is distinguished under the agreement according to claim 1 based on HDMI, it is characterised in that institute
State and 2) be specifically：To each block, the bit 1-bit of one of pixel is chosen as flag bit, corresponding to marking
Block is Video signals or osd signal.
5. the method for OSD and Video signals is distinguished under the agreement according to claim 1 based on HDMI, it is characterised in that institute
State and 3) be specifically：Using neighborhood information come the signal of video signal of recovering mark position, in signal processing, the picture containing flag bit
Prime component have lost the image information contained by itself, if do not repaired, can reduce signal of video signal quality, certain using its
Pixel in the neighborhood of size, the image information of its loss is solved using interpolation, and lifting recovers signal of video signal quality.
6. the method for OSD and Video signals is distinguished under the agreement according to claim 5 based on HDMI, it is characterised in that base
In different size of contiguous range, using different interpolation algorithms.
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Citations (5)
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| CN1567170A (en) * | 2003-06-13 | 2005-01-19 | 钰创科技股份有限公司 | Method for displaying form partition on screen |
| KR20070048388A (en) * | 2005-11-04 | 2007-05-09 | 엘지전자 주식회사 | Screen select capable video display apparatus and control method thereof |
| CN1969314A (en) * | 2004-06-15 | 2007-05-23 | 索尼株式会社 | Image processing device and method, recording medium, and program |
| CN101127847A (en) * | 2007-08-29 | 2008-02-20 | 杭州华三通信技术有限公司 | A screen display synthesis method and synthesis device |
| CN102186035A (en) * | 2010-12-29 | 2011-09-14 | 友达光电股份有限公司 | Method for displaying screen display information |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5614098B2 (en) * | 2010-05-19 | 2014-10-29 | ソニー株式会社 | Video display device, frame rate conversion device, and display method |
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- 2015-02-28 CN CN201510091819.8A patent/CN104702878B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1567170A (en) * | 2003-06-13 | 2005-01-19 | 钰创科技股份有限公司 | Method for displaying form partition on screen |
| CN1969314A (en) * | 2004-06-15 | 2007-05-23 | 索尼株式会社 | Image processing device and method, recording medium, and program |
| KR20070048388A (en) * | 2005-11-04 | 2007-05-09 | 엘지전자 주식회사 | Screen select capable video display apparatus and control method thereof |
| CN101127847A (en) * | 2007-08-29 | 2008-02-20 | 杭州华三通信技术有限公司 | A screen display synthesis method and synthesis device |
| CN102186035A (en) * | 2010-12-29 | 2011-09-14 | 友达光电股份有限公司 | Method for displaying screen display information |
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