CN101127847A - A screen display synthesis method and synthesis device - Google Patents
A screen display synthesis method and synthesis device Download PDFInfo
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- CN101127847A CN101127847A CNA2007101210878A CN200710121087A CN101127847A CN 101127847 A CN101127847 A CN 101127847A CN A2007101210878 A CNA2007101210878 A CN A2007101210878A CN 200710121087 A CN200710121087 A CN 200710121087A CN 101127847 A CN101127847 A CN 101127847A
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Abstract
The utility model provides an OSD synthesization way and a device in which OSD video data and original video data are synchronized previously and OSD is synthesized on original video data according to coordinate locations of recognized pixels of an OSD image. The utility model has the advantages of low system cost and less time delay caused by OSD processing.
Description
Technical field
The present invention relates to the video data processing technology field, be specifically related to a kind of synthetic method and synthesizer that shows (OSD, OnScreen Display) at screen
Background technology
In recent years, various digital video monitor systems have obtained in fields such as highway, electric power, banks using very widely.Digital video monitor system usually adopts the OSD technology to realize the mutual of man-machine interface.The OSD technology is used quite flexible, for example, and behind synthetic OSD image on the local video data, again the video data after synthetic being carried out video coding handles, then, the data behind the coding are sent to far-end by network, the data that receive are decoded and play by far-end.At present, the form of the OSD that is adopted aspect video specifically can be divided into two kinds of character and bitmaps.By the OSD Display Technique, can show the information such as time, place of current video, can also on live video stream, realize functions such as menu, mouse, greatly facilitate operations such as identification to video, storage.
How on video data, to synthesize OSD, to this, one of solution of prior art is to realize by software mode, promptly, accessed every frame video data is buffered in earlier in internal memory or the external memory space, calculate the coordinate that OSD shows by software, and in internal memory or external memory space, find the memory cell of relevant position, insert the osd information that needs demonstration.This method is applicable to and shows simple OSD literal, colouring information, its very flexible.When the large information capacity of display menu, icon class, multicoloured OSD, because these osd data amounts are bigger, the workload of computed in software is also very big, owing to need do the osd information stack to every frame video data, causes whole computing to take a large amount of cpu resources simultaneously.When being used for monitoring in real time, this method is because amount of calculation is bigger, and the time-delay that causes is comparatively obvious.In order to reduce time-delay, need adopt more the CPU process chip and the high-speed cache of high primary frequency, the cost of whole system is significantly increased.
The another kind of scheme of the synthetic OSD of prior art is to realize the function of OSD stack by logic.Promptly by extensive logical device and corresponding metadata cache, the digital video signal that modulus (AD) is converted to carries out buffer memory, generates corresponding character library and OSD stack mechanism in logic.CPU only need provide information such as the coordinate, color, display font of OSD, can realize that OSD's is synthetic.Though this method has alleviated the burden of CPU, need to increase large-scale logical device simultaneously, need to consume a large amount of logical resources.And logical device need carry out OSD dot matrix coordinate Calculation.This can also calculate for assignment graph and literal, but then comparatively difficult for unknown figure and image, thereby its application has certain limitation.
Can also adopt the OSD special integrated chip to realize osd function in the prior art.This mode needs word-base chip, and can only show the simple graph of character default in the character library and menu and so on, can't show the character information that does not have in complicated figure, random figure or sign (logo) icon and the character library, and its autgmentability is relatively poor.
Summary of the invention
Technical problem to be solved by this invention provides synthetic method and the synthesizer of a kind of OSD, realizes that at lower cost OSD is synthetic, and reduces the synthetic time delay of being brought of handling of OSD.
For solving the problems of the technologies described above, it is as follows to the invention provides scheme:
A kind of synthetic method at screen demonstration OSD is used for synthetic OSD image on original video data, comprises step:
A, synchronously OSD video data and original video data, and the effective image-region of OSD video data and original video data is arranged to consistent, wherein, background pixel is different with the color value of OSD image pixel in the described OSD video data;
B according to color of pixel value in the OSD video data, identifies the position coordinates of OSD image pixel, synthesizes the OSD image corresponding to this position coordinates place in original video data.
Method of the present invention wherein, also comprises step:
C carries out exporting behind the video coding to the original video data of having synthesized the OSD image.
Method of the present invention, wherein, in the described steps A, described synchronous OSD video data and original video data comprise: for writing reference clock, original video data is write a fifo fifo buffer memory with the pixel clock signal of original video data; For reading reference clock, read the original video data of the preservation in the FIFO buffer memory with the pixel clock signal of OSD video data, wherein, the pixel clock signal of described OSD video data is identical with the frequency of the pixel clock signal of original video data.
Method of the present invention, wherein, the original video data that writes the FIFO buffer memory comprises: the line synchronizing signal of original video data, field sync signal and view data.
Method of the present invention, wherein, among the described step B, describedly in original video data be corresponding to the synthetic OSD image in this position coordinates place: in original video data corresponding to this position coordinates place, the color of replacing current pixel is the color of the OSD image pixel of correspondence, and the color of perhaps replacing current pixel is a predetermined color.
Method of the present invention, wherein, among the described step B, describedly in original video data be corresponding to the synthetic OSD image in this position coordinates place: in original video data corresponding to this position coordinates place, color value to current pixel carries out inversion operation, perhaps whether the color value according to current pixel reaches reservation threshold, resets the color value of current pixel.
A kind of OSD synthesizer comprises:
Lock unit is used for synchronous OSD video data and original video data, and the effective image-region of OSD video data and original video data is arranged to consistent, and wherein, background pixel is different with the color value of OSD image pixel in the described OSD video data;
Synthesis unit is used for identifying the position coordinates of OSD image pixel according to OSD video data color of pixel value, synthesizes the OSD image corresponding to this position coordinates place in original video data.
Synthesizer of the present invention wherein, also comprises:
Coding unit, the original video data that is used for described synthesis unit has been synthesized the OSD image carries out exporting behind the video coding.
Synthesizer of the present invention, wherein, described lock unit is further used for pixel clock signal with original video data for writing reference clock, and original video data is write a FIFO buffer memory; For reading reference clock, read the original video data of preserving in the FIFO buffer memory with the pixel clock signal of OSD video data, wherein, the pixel clock signal of described OSD video data is identical with the frequency of the pixel clock signal of original video data.
Synthesizer of the present invention, wherein, described synthesis unit is further used in original video data corresponding to described position coordinates place, the color of replacing current pixel is the color of the OSD image pixel of correspondence, and the color of perhaps replacing current pixel is a predetermined color.
Synthesizer of the present invention, wherein, described synthesis unit, be further used in original video data corresponding to described position coordinates place, color value to current pixel carries out inversion operation, perhaps whether the color value according to current pixel reaches reservation threshold, resets the color value of current pixel.
From the above as can be seen, the synthetic method of OSD provided by the invention and synthesizer, by in advance OSD video data and original video data being carried out Synchronous Processing, it is synthetic to carry out OSD again, can significantly reduce amount of calculation, reduce CPU usage, reduce the time delay that OSD handles greatly, also save a large amount of cache resources simultaneously, reduced system cost.And the present invention also provides the control method of OSD Show Color, by the configuration color register, can realize the arbitrary graphic color, thereby OSD control has very big flexibility.
Description of drawings
Fig. 1 is the flow chart of the synthetic method of the described OSD of the embodiment of the invention;
Fig. 2 is the schematic diagram of the synchronous regime of OSD video data and original video data;
Fig. 3 is for carrying out the schematic diagram of Synchronous Processing by the FIFO buffer memory;
Fig. 4 is the example schematic of original video data in the embodiment of the invention;
Fig. 5 is the example schematic of OSD video data in the embodiment of the invention;
Fig. 6 is for having synthesized the example schematic of the original video data of OSD image in the embodiment of the invention;
Fig. 7 is the structural representation of the described OSD synthesizer of the embodiment of the invention.
Embodiment
The invention provides synthetic method and the synthesizer of a kind of OSD,, realize the synthetic processing of OSD by OSD video data and original video data are superposeed synchronously.The present invention is described in detail by specific embodiment below in conjunction with accompanying drawing.
In the present embodiment, by CPU and middle and small scale logical device, CPLD (CPLD) is for example finished the generation of OSD, synthetic, control etc. jointly.The synthetic method of the described OSD of the embodiment of the invention as shown in Figure 1, may further comprise the steps:
Here, described OSD video data is to utilize cpu chip to carry OSD Presentation Function in the decoder module, generates also output OSD video data, wherein, described OSD video data comprises background pixel and OSD image pixel, and background pixel is configured to different color values with the OSD image pixel.What the OSD image was concrete can be character and bitmap etc., wherein comprises the piece that blocks that is used for shielded image information in the bitmap again.OSD image for concrete can be set to different colors.For example, be respectively character or block piece different colors is set, certainly, character can not be identical with the color of background pixel with the color of blocking piece.
Here, described original video data is the video data that needs stack OSD image, normally by video modulus (AD) conversion chip the original analog signal in outside is carried out obtaining after AD changes, and comprises various synchronizing signals and view data.
Here, described original video data and OSD video data are live video stream, present embodiment is to reach the synchronous purpose of output to carry out the mass data buffer memory to avoid when OSD is synthetic, thereby has saved a large amount of spatial caches by in advance above-mentioned two kinds of video datas being carried out Synchronous Processing.Need synchronous signal to comprise between above-mentioned two kinds of video datas: row is (HS), field synchronization (VS) and parity field signal (FD) and corresponding pixel clock (PCLK) etc. synchronously, and the PCLK frequency of wherein above-mentioned two kinds of signals is identical, and may there be skew in phase place.As shown in Figure 2, after original video data and OSD video data reach fully synchronously, signals such as their HS, VS, FD and PCLK will be overlapping fully (not shown FD and PCLK among Fig. 2).
Here, described Synchronous Processing can realize by first in first out (FIFO, First In First Out) buffer memory: as writing reference clock, original video data is write the FIFO buffer memory with the PCLK of original video data; Simultaneously,, the original video data of storing in the FIFO buffer memory is read, thereby original video data is synchronized on the PCLK of OSD video data as reading reference clock with the PCLK of OSD video data.For example, as shown in Figure 3, it is the FIFO buffer memory of 4 memory cell that length is set, and the bit wide of each memory cell is set according to concrete applied environment.Begin to write original video data from the P1 position, read this video data from the P2 position again, wherein, the position of P1 and P2 is according to P1:1-〉2-〉3-〉4-〉1, P2:3-〉4-〉1-〉2-〉3 in the FIFO buffer memory, circulate, that is, differ about 2 memory cell between P1 and the P2 all the time.Because mobile data not only in data synchronization process by changing memory location P1, P2.Therefore, if having phase difference between OSD video data and the original video data, just can realize synchronously by this FIFO buffer memory.Here, carrying out synchronous original video data by the FIFO buffer memory specifically comprises: the line synchronizing signal of original video data, field sync signal and view data etc.For the line synchronizing signal and the field sync signal of the original video data of from the FIFO buffer memory, reading, can be respectively as the line synchronizing signal and the field sync signal of OSD video data, with realize between original video data and OSD video data synchronously.
Here, after finishing synchronously, also need further to be arranged to the effective image-region of OSD video data and original video data consistent, the value of concrete related register that can be by adjusting video AD conversion chip or CPU realizes, for example, the effective image-region of OSD video data and original video data has been shown among Fig. 2, by regulating related register, make the original position of every capable valid data district (HVALID) and every effective coverage (VVALID) of two kinds of video datas, end position is all identical, to guarantee the effective image-region unanimity of above-mentioned two kinds of video datas.
Here, because background pixel is different with the color value of OSD image pixel in the OSD video data, thereby, can be according to the difference between the color value, identify the position coordinates of OSD image pixel, under OSD video data and the complete synchronous situation of original video data, the position coordinates of the OSD image pixel that is identified, be exactly the position coordinates of OSD image on original video data after synthesizing, thereby can in original video data, carry out OSD and synthesize according to the position coordinates that is identified corresponding to this position coordinates place.Please refer to Fig. 4～6, provided an example that OSD is synthetic, the original video data that Fig. 4～6 are respectively original video data, OSD video data and have synthesized the OSD image.In each figure, represent different colors with different lines filling modes, wherein, the OSD image among Fig. 5 comprises character " WORD ", arrow and the rectangular piece that blocks.In Fig. 6,, synthesized above-mentioned OSD image respectively corresponding to the position of above-mentioned OSD image.
Here, after the position coordinates of OSD identifies, when on original video data, synthesizing the OSD image, color for the OSD image has multiple processing mode, for example, corresponding to the position coordinates place of OSD image pixel, replacing current pixel is the pairing OSD image pixel of this position coordinates in original video data, promptly directly the color of the OSD image pixel at this position coordinates place is substituted in the original video data on the pixel corresponding to this position coordinates; Perhaps control the color of OSD image pixel by color register, promptly after OSD image pixel coordinate identifies, after for example identifying character and blocking the position coordinates of piece, according to character and the value of blocking the pairing color register of piece, color of pixel is set in the corresponding position of original video data.CPU can be by the value of the above-mentioned color register of configuration, the just color of may command OSD image.This mode can be very easy on original video, realize multiple effects such as menu, color graphics, literal.
In addition, can also be in original video data corresponding to the position coordinates place of OSD image, color value to current pixel carries out inversion operation, perhaps whether the color value according to current pixel reaches reservation threshold, reset the color value of current pixel, to reach the adaptive control of OSD display effect.
Here, because the synthetic operation in the step 12 is based on two kinds of synchronous video datas fully, and only carries out OSD to the effective image-region in two kinds of video datas and handle, kept the capable field blanking and the corresponding synchronous head of former video data.The operation of step 12 is transparent concerning original video data is handled for follow-up, therefore, can handle the original video data of having synthesized the OSD image by normal video input.The original video data of having synthesized the OSD image can be stored behind video coding, perhaps arrives terminal by Network Transmission, the decoded and broadcast demonstration in end.
Above embodiment has illustrated the synthetic method of OSD, as can be seen, owing in advance OSD video data and original video data are carried out Synchronous Processing, it is synthetic to carry out OSD again, and present embodiment can significantly reduce amount of calculation, reduces CPU usage, save a large amount of cache resources, reduced system cost.And present embodiment also provides the control method of OSD Show Color, by the configuration color register, can realize the arbitrary graphic color, thereby OSD control has very big flexibility.
Based on the synthetic method of above-mentioned OSD, present embodiment also provides a kind of OSD synthesizer accordingly, and as shown in Figure 7, this OSD synthesizer 70 comprises:
In sum,, can realize at lower cost that OSD is synthetic, and significantly reduce the synthetic time delay of being brought of handling of OSD according to synthetic method and the OSD synthesizer of the described OSD of the embodiment of the invention.
The synthetic method of OSD of the present invention and OSD synthesizer, be not restricted to listed utilization in specification and the execution mode, it can be applied to various suitable the present invention's field fully, for those skilled in the art, can easily realize additional advantage and make amendment, therefore under the situation of the spirit and scope of the universal that does not deviate from claim and equivalency range and limited, the examples shown that the present invention is not limited to specific details, representational equipment and illustrates here and describe.
Claims (11)
1. the synthetic method at screen demonstration OSD is used for synthetic OSD image on original video data, it is characterized in that, comprises step:
A, synchronously OSD video data and original video data, and the effective image-region of OSD video data and original video data is arranged to consistent, wherein, background pixel is different with the color value of OSD image pixel in the described OSD video data;
B according to color of pixel value in the OSD video data, identifies the position coordinates of OSD image pixel, synthesizes the OSD image corresponding to this position coordinates place in original video data.
2. the method for claim 1 is characterized in that, also comprises step:
C carries out exporting behind the video coding to the original video data of having synthesized the OSD image.
3. the method for claim 1, it is characterized in that, in the described steps A, described synchronous OSD video data and original video data comprise: for writing reference clock, original video data is write a fifo fifo buffer memory with the pixel clock signal of original video data; For reading reference clock, read the original video data of the preservation in the FIFO buffer memory with the pixel clock signal of OSD video data, wherein, the pixel clock signal of described OSD video data is identical with the frequency of the pixel clock signal of original video data.
4. method as claimed in claim 3 is characterized in that, the original video data that writes the FIFO buffer memory comprises: the line synchronizing signal of original video data, field sync signal and view data.
5. the method for claim 1, it is characterized in that, among the described step B, describedly in original video data be corresponding to the synthetic OSD image in this position coordinates place: in original video data corresponding to this position coordinates place, the color of replacing current pixel is the color of the OSD image pixel of correspondence, and the color of perhaps replacing current pixel is a predetermined color.
6. the method for claim 1, it is characterized in that, among the described step B, describedly in original video data be corresponding to the synthetic OSD image in this position coordinates place: in original video data corresponding to this position coordinates place, color value to current pixel carries out inversion operation, perhaps whether the color value according to current pixel reaches reservation threshold, resets the color value of current pixel.
7. an OSD synthesizer is characterized in that, comprising:
Lock unit is used for synchronous OSD video data and original video data, and the effective image-region of OSD video data and original video data is arranged to consistent, and wherein, background pixel is different with the color value of OSD image pixel in the described OSD video data;
Synthesis unit is used for identifying the position coordinates of OSD image pixel according to OSD video data color of pixel value, synthesizes the OSD image corresponding to this position coordinates place in original video data.
8. synthesizer as claimed in claim 7 is characterized in that, also comprises:
Coding unit, the original video data that is used for described synthesis unit has been synthesized the OSD image carries out exporting behind the video coding.
9. synthesizer as claimed in claim 7 is characterized in that, described lock unit is further used for pixel clock signal with original video data for writing reference clock, and original video data is write a FIFO buffer memory; For reading reference clock, read the original video data of preserving in the FIFO buffer memory with the pixel clock signal of OSD video data, wherein, the pixel clock signal of described OSD video data is identical with the frequency of the pixel clock signal of original video data.
10. synthesizer as claimed in claim 7, it is characterized in that described synthesis unit is further used in original video data corresponding to described position coordinates place, the color of replacing current pixel is the color of the OSD image pixel of correspondence, and the color of perhaps replacing current pixel is a predetermined color.
11. synthesizer as claimed in claim 7, it is characterized in that, described synthesis unit, be further used in original video data corresponding to described position coordinates place, color value to current pixel carries out inversion operation, perhaps whether the color value according to current pixel reaches reservation threshold, resets the color value of current pixel.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244739A (en) * | 2010-05-10 | 2011-11-16 | 联想(北京)有限公司 | Image processing device, image processing method and image processing system |
| CN103974007A (en) * | 2013-01-28 | 2014-08-06 | 杭州海康威视数字技术股份有限公司 | Superposition method and device of on-screen display (OSD) information |
| CN104065895A (en) * | 2013-03-22 | 2014-09-24 | 索尼公司 | Image processing apparatus, source device, image processing system, image processing method, and program |
| CN104702878A (en) * | 2015-02-28 | 2015-06-10 | 宏祐图像科技(上海)有限公司 | Method for differentiating OSD and Video signals based on HDMI protocol |
| CN107483846A (en) * | 2017-08-29 | 2017-12-15 | 西安全志科技有限公司 | Video and graph compound method, stacking apparatus, code device and storage medium |
| CN110266977A (en) * | 2014-06-10 | 2019-09-20 | 株式会社索思未来 | The control method that semiconductor integrated circuit and image are shown |
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2007
- 2007-08-29 CN CNA2007101210878A patent/CN101127847A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244739A (en) * | 2010-05-10 | 2011-11-16 | 联想(北京)有限公司 | Image processing device, image processing method and image processing system |
| CN103974007A (en) * | 2013-01-28 | 2014-08-06 | 杭州海康威视数字技术股份有限公司 | Superposition method and device of on-screen display (OSD) information |
| CN103974007B (en) * | 2013-01-28 | 2017-10-03 | 杭州海康威视数字技术股份有限公司 | The stacking method and device of screen menu type regulative mode information |
| CN104065895A (en) * | 2013-03-22 | 2014-09-24 | 索尼公司 | Image processing apparatus, source device, image processing system, image processing method, and program |
| CN104065895B (en) * | 2013-03-22 | 2019-04-19 | 索尼公司 | For the source device of image procossing, device, system, methods and procedures |
| CN110266977A (en) * | 2014-06-10 | 2019-09-20 | 株式会社索思未来 | The control method that semiconductor integrated circuit and image are shown |
| CN110266977B (en) * | 2014-06-10 | 2021-06-25 | 株式会社索思未来 | Semiconductor integrated circuit and control method of image display |
| CN104702878A (en) * | 2015-02-28 | 2015-06-10 | 宏祐图像科技(上海)有限公司 | Method for differentiating OSD and Video signals based on HDMI protocol |
| CN104702878B (en) * | 2015-02-28 | 2018-03-16 | 宏祐图像科技(上海)有限公司 | Based on the method that OSD and Video signals are distinguished under HDMI agreements |
| CN107483846A (en) * | 2017-08-29 | 2017-12-15 | 西安全志科技有限公司 | Video and graph compound method, stacking apparatus, code device and storage medium |
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