CN107888863A - It is a kind of to take out frame method to what standard analog video circulation was changed for superelevation frame frequency image stream - Google Patents
It is a kind of to take out frame method to what standard analog video circulation was changed for superelevation frame frequency image stream Download PDFInfo
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- CN107888863A CN107888863A CN201711221456.0A CN201711221456A CN107888863A CN 107888863 A CN107888863 A CN 107888863A CN 201711221456 A CN201711221456 A CN 201711221456A CN 107888863 A CN107888863 A CN 107888863A
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- frame
- frequency image
- analog video
- superelevation
- image stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
- H04N7/0102—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving the resampling of the incoming video signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
Abstract
The present invention relates to a kind of frame method is taken out for superelevation frame frequency image stream to what standard analog video circulation was changed, utilize the trigger signal synchronization criterion analog video stream trigger signal of superelevation frame frequency image stream, the phase relation of the trigger signal of automatic adjusument superelevation frame frequency image stream and standard analog video stream trigger signal simultaneously, according to the analog video cycle frame image signal is extracted from superelevation frame frequency image stream, the timing conflict that superelevation frame frequency image procossing sequential is shown with standard analog video can effectively be evaded, and then realize conversion of the superelevation frame frequency image stream to standard analog video stream.This method has been engineered realization, in the case where not influenceing superelevation frame frequency image stream processing sequential and not increasing hardware store resource consumption, superelevation frame frequency image stream can be achieved to the conversion of standard analog video stream, be easy to Visual Observations Observations, have good engineering practicability.
Description
Technical field
The invention belongs to technical field of image processing, is related to a kind of superelevation frame frequency image stream that is used for standard analog video stream
Frame method is taken out in conversion.
Background technology
In infrared imaging guidance system, as the distance of guided missile and target approaches, the gradual increase of target forms unstable
Plaque-like, whole visual field is finally full of with speed quickly, the supersonic speed epoch process may occur only at some seconds it
It is interior.And the analog video of standard, by taking pal mode as an example, it is per second in be only capable of collecting 40 frame image datas, for high speed guidance be
The speed is obvious excessively slow for system, and this requires infrared detector to be operated under high speed external trigger pattern, and output frame can
Reach hundreds of or even thousand hertz.Still need to realize that analog video is shown in this case for ease of Visual Observations Observations.Used in the past
Method be from superelevation frame frequency image stream by the analog video cycle directly extract a two field picture realize simulative display, but this method
Following drawback be present：First, directly taking out the method that frame is shown requires that the cycle of the trigger signal of superelevation frame frequency image stream is necessary for mould
Intend the integral multiple of video cycle；Second, the phase determined is not present with the trigger signal of superelevation frame frequency image stream for analog video signal
Relation, easy generation timing sequence conflict；Third, when the frequency of superelevation frame frequency image stream is too high, a frame data are directly extracted from multiframe
Realize that the process of simulative display is extremely loaded down with trivial details.For above drawback, propose a kind of superelevation frame frequency image stream that is used for standard analog
Frame algorithm is taken out in video flowing conversion.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of superelevation frame frequency image stream that is used for standard analog
Frame method is taken out in video flowing conversion, and elimination realizes that superelevation frame frequency image stream circulates to standard analog video using frame method is directly taken out
The drawbacks of changing, improve simplicity and stability that superelevation frame frequency image stream is changed to standard analog video circulation.
Technical scheme
It is a kind of to take out frame method to what standard analog video circulation was changed for superelevation frame frequency image stream, it is characterised in that step is such as
Under：
Step 1：By the trigger signal of outside host computer input superelevation frame frequency image stream；
Step 2：Trigger collection signal, completion edge, which disappears, to be trembled；Pulsewidth deburring is realized according to trigger signal pulsewidth；
Step 3：Phase synchronization counter, subsequent Phase synchronization counter are reset with the trigger signal of superelevation frame frequency image stream
Start counting up, infrared detector is triggered on the basis of counter and exports useful signal, and the trigger mode on the basis of counter by frame
Intend the beginning of video flowing, realize the phase relation for having determination of standard analog video stream and superelevation frame frequency image stream, realize phase
It is synchronous；
Step 4：With the reading enable signal of standard analog video stream, the reading of picture frame deposit data is triggered；
Step 5：Read frame deposit data after, set frame deposit run through mark and closure frame deposit and write mark, start simultaneously at
The effective commencing signal of frame of superelevation frame frequency image stream is monitored, after monitoring that frame starts useful signal, with frame useful signal and data
Mark is run through mutually with rear as the enable signal write frame and deposited, and then the valid data of infrared detector output are write into frame and deposited；
Step 6：Write after frame deposits, set frame to deposit and write mark and closure frame is deposited and runs through mark and no longer write new image
It data, can so ensure to write the complete view data of a frame in frame is deposited, it is required when read cycle arrives to meet that next frame is deposited
View data, realize conversion of the superelevation frame frequency image stream to standard analog video stream.
Beneficial effect
A kind of frame method of taking out changed that circulated for superelevation frame frequency image stream to standard analog video proposed by the present invention, is utilized
The trigger signal synchronization criterion analog video stream trigger signal of superelevation frame frequency image stream, while automatic adjusument superelevation frame frequency image
The trigger signal of stream and the phase relation of standard analog video stream trigger signal, according to the analog video cycle from superelevation frame frequency image
A frame image signal is extracted in stream, can effectively evade superelevation frame frequency image procossing sequential and be rushed with the sequential that standard analog video is shown
It is prominent, and then realize conversion of the superelevation frame frequency image stream to standard analog video stream.This method has been engineered realization, is not influenceing to surpass
High frame frequency image stream process sequential and in the case of not increasing hardware store resource consumption, superelevation frame frequency image stream can be achieved to marking
The conversion of quasi- analog video stream, is easy to Visual Observations Observations, has good engineering practicability.
Brief description of the drawings
Fig. 1 is the specific implementation program circuit schematic diagram of the present invention.
Fig. 2 is time diagram involved in the present invention.
Embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described：
1) trigger signal of superelevation frame frequency image stream is inputted by outside host computer；
2) trigger collection signal, completion edge, which disappears, to be trembled；Pulsewidth deburring is realized according to trigger signal pulsewidth, to avoid triggering
The problems of Signal Integrity such as signal jitter, burr cause the false triggering of image stream to export；
3) it is guarantee standard analog video stream and the simultaneous display of superelevation frame frequency image stream, standard analog video stream and superelevation
Frame frequency image stream need to have the phase relation of determination, and the Phase synchronization of two kinds of video flowings is completed according to step 4；
4) Phase synchronization counter is reset with the trigger signal of superelevation frame frequency image stream, subsequent Phase synchronization counter starts
Count, infrared detector is triggered on the basis of counter by frame output useful signal, and trigger simulation on the basis of counter and regard
The beginning of frequency stream, it can so ensure the phase relation for having determination of standard analog video stream and superelevation frame frequency image stream, Jin Ershi
Existing Phase synchronization；
5) with the reading enable signal of standard analog video stream, the reading of picture frame deposit data is triggered
6) read frame deposit data after, set frame deposit run through mark and closure frame deposit and write mark, start simultaneously at monitoring
The effective commencing signal of frame of superelevation frame frequency image stream, after monitoring that frame starts useful signal, is run through with frame useful signal and data
The valid data of infrared detector output are write frame and deposited by mark mutually with rear as the enable signal write frame and deposited；
7) write after frame deposits, set frame to deposit and write mark and closure frame is deposited and runs through mark and no longer write new picture number
According to, can so ensure to write the complete view data of a frame in frame is deposited, meet next frame deposit read cycle arrive when it is required
View data, realize conversion of the superelevation frame frequency image stream to standard analog video stream.
Claims (1)
1. a kind of take out frame method for superelevation frame frequency image stream to what standard analog video circulation was changed, it is characterised in that step is such as
Under：
Step 1：By the trigger signal of outside host computer input superelevation frame frequency image stream；
Step 2：Trigger collection signal, completion edge, which disappears, to be trembled；Pulsewidth deburring is realized according to trigger signal pulsewidth；
Step 3：Phase synchronization counter is reset with the trigger signal of superelevation frame frequency image stream, subsequent Phase synchronization counter starts
Count, infrared detector is triggered on the basis of counter by frame output useful signal, and trigger simulation on the basis of counter and regard
The beginning of frequency stream, realizes the phase relation for having determination of standard analog video stream and superelevation frame frequency image stream, realizes Phase synchronization；
Step 4：With the reading enable signal of standard analog video stream, the reading of picture frame deposit data is triggered；
Step 5：Read frame deposit data after, set frame deposit run through mark and closure frame deposit and write mark, start simultaneously at monitoring
The effective commencing signal of frame of superelevation frame frequency image stream, after monitoring that frame starts useful signal, is run through with frame useful signal and data
The valid data of infrared detector output are write frame and deposited by mark mutually with rear as the enable signal write frame and deposited；
Step 6：Write after frame deposits, set frame to deposit and write mark and closure frame is deposited and runs through mark and no longer write new picture number
According to, can so ensure to write the complete view data of a frame in frame is deposited, meet next frame deposit read cycle arrive when it is required
View data, realize conversion of the superelevation frame frequency image stream to standard analog video stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221456.0A CN107888863B (en) | 2017-11-29 | 2017-11-29 | Frame extraction method for converting ultrahigh frame frequency image stream into standard analog video stream |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711221456.0A CN107888863B (en) | 2017-11-29 | 2017-11-29 | Frame extraction method for converting ultrahigh frame frequency image stream into standard analog video stream |
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| Publication Number | Publication Date |
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| CN107888863A true CN107888863A (en) | 2018-04-06 |
| CN107888863B CN107888863B (en) | 2020-02-14 |
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Citations (7)
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| CN1538736A (en) * | 2003-04-18 | 2004-10-20 | 成都威斯达芯片有限责任公司 | Method of conversing image framel field frequency in video signal processing |
| CN1627359A (en) * | 2003-09-25 | 2005-06-15 | 佳能株式会社 | Frame rate conversion device, overtaking prediction method for use in the same, display control device and video receiving display device |
| CN1719888A (en) * | 2005-08-08 | 2006-01-11 | 北京中星微电子有限公司 | Apparatus for implementing video frequency sequential to interlaced conversion and converting method |
| US20090040373A1 (en) * | 2007-08-08 | 2009-02-12 | Alpha Networks Inc. | Interface converting circuit |
| CN201892936U (en) * | 2010-12-06 | 2011-07-06 | 中国航空工业集团公司第六三一研究所 | Video conversion device |
| CN103518369A (en) * | 2011-04-01 | 2014-01-15 | 松下电器产业株式会社 | Video signal frame rate conversion device and method, and video processing device using said frame rate conversion |
| CN104639951A (en) * | 2013-11-06 | 2015-05-20 | 杭州海康威视数字技术股份有限公司 | Video bitstream frame extraction process and device |
-
2017
- 2017-11-29 CN CN201711221456.0A patent/CN107888863B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1538736A (en) * | 2003-04-18 | 2004-10-20 | 成都威斯达芯片有限责任公司 | Method of conversing image framel field frequency in video signal processing |
| CN1627359A (en) * | 2003-09-25 | 2005-06-15 | 佳能株式会社 | Frame rate conversion device, overtaking prediction method for use in the same, display control device and video receiving display device |
| CN1719888A (en) * | 2005-08-08 | 2006-01-11 | 北京中星微电子有限公司 | Apparatus for implementing video frequency sequential to interlaced conversion and converting method |
| US20090040373A1 (en) * | 2007-08-08 | 2009-02-12 | Alpha Networks Inc. | Interface converting circuit |
| CN201892936U (en) * | 2010-12-06 | 2011-07-06 | 中国航空工业集团公司第六三一研究所 | Video conversion device |
| CN103518369A (en) * | 2011-04-01 | 2014-01-15 | 松下电器产业株式会社 | Video signal frame rate conversion device and method, and video processing device using said frame rate conversion |
| CN104639951A (en) * | 2013-11-06 | 2015-05-20 | 杭州海康威视数字技术股份有限公司 | Video bitstream frame extraction process and device |
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| CN107888863B (en) | 2020-02-14 |
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