CN105657412B - A kind of test method of video frame rate - Google Patents
A kind of test method of video frame rate Download PDFInfo
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- CN105657412B CN105657412B CN201511031324.2A CN201511031324A CN105657412B CN 105657412 B CN105657412 B CN 105657412B CN 201511031324 A CN201511031324 A CN 201511031324A CN 105657412 B CN105657412 B CN 105657412B
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- luminescence unit
- frame rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The present invention relates to video measurement technical field more particularly to a kind of test methods of video frame rate, can be applied in the whole picture signal test of digital end opposite equip., and the digital end opposite equip. includes the pattern generator for being provided with LED light array；By on LED light array along preset direction select several LED light be used as test lamp group, the test lamp group include multiple luminescence units, each luminescence unit include adjacent multiple LED light；Each luminescence unit is lighted successively and gradually promotes the ignition frequency of luminescence unit；Obtain the image that test lamp group is presented in real time using image-capturing apparatus, and when the image of the luminescence unit of acquisition is presented stationary, using the ignition frequency value on pictcure generator at this time as the value of the video frame rate of digital end opposite equip., and then complete above-mentioned whole picture signal test.Since above-mentioned technical proposal is simple, easily implements, and with higher testing efficiency and reliability, and then above-mentioned whole picture signal test can be rapidly completed.
Description
Technical field
The present invention relates to video measurement technical field more particularly to a kind of test methods of video frame rate.
Background technology
At present, no standard interface or transport protocol are non-standard or take the digital end opposite equip. of encryption technology very more,
Existing electric signal-picture signal test method, which such as can be used, can not carry out Validity Test, but its can only use it is end-to-end complete
Journey picture signal is tested.Wherein, exemplified by residing intercom system by house safety technological prevention product building, because its transport protocol is non-standard
It is non-standard with interface, make the test of its voice quality can only carry out whole picture signal test.Such as, in family's building talkback
In machine, video becomes a kind of effective tool of information identification, and being loaded with the building speakerphone of video can not only allow owner to catch
The sound of guest more can effectively identify the person that has come as whom, and change to a certain extent improves the safety of family, however, therein
Video equipment is not that clearly image can be provided for client once producing, and the generation of the clear image is based on a series of effective surveys
The result of examination carries out loop test and debugging, is tested wherein just including frame per second.But the test of frame per second at present can not meet by
The requirement of the building speakerphone gradually developed.
Therefore, how efficiently to complete the test of video frame rate becomes a great problem that those skilled in the art face.
The content of the invention
In view of the above problems, the present invention provides a kind of test method of video frame rate, can be applied to no standard interface or
Transport protocol is non-standard or takes (such as house safety technological prevention product building residence intercommunication of the digital end opposite equip. of encryption technology
Equipment) the whole picture signal test that carries out, and above-mentioned digital end opposite equip. may include the figure for being provided with LED light array
Generator, the method may include；
Video capturing device is provided；
In selecting several LED light as test lamp group along preset direction on the LED light array, the test lamp group includes
Multiple luminescence units, and each luminescence unit includes adjacent multiple LED light；
Along it is described test lamp group extending direction according to rearwardly put in order from the test lamp group head light successively it is each
Luminescence unit, while capture equipment using described image and obtain the image tested lamp group and presented in real time；
Gradually promote the ignition frequency of the luminescence unit on described image generator；And
When the image presentation of the luminescence unit in the test lamp group that described image capture equipment captures is static not
During dynamic state, the ignition frequency on pictcure generator at this time is recorded；
Wherein, using the value of the ignition frequency of record as the value of the video frame rate of the digital end opposite equip..
As a preferred embodiment, the test method of above-mentioned video frame rate further includes：
The image presentation that described image captures the luminescence unit in the test lamp group that equipment captures is stationary
During state, stop being promoted the ignition frequency of the luminescence unit on described image generator；
Judge whether the motionless state of image remains stationary of the luminescence unit in the test lamp group reaches preset time；
If reaching preset time, the ignition frequency on pictcure generator is recorded, and using the value of the ignition frequency as institute
State the value of the video frame rate of digital end opposite equip.；
Otherwise, the ignition frequency of the luminescence unit on described image generator is continued to lift up.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
The preset time is 5~15s, such as 5s, 10s, 12s or 15s.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
Each luminescence unit includes four or five LED light that adjacent continuous is set.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
The pattern generator further includes programmable controller；
The programmable controller is connected with the LED light array, to control the ignition frequency of the luminescence unit.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
The test lamp group is selected along the column direction or line direction of the LED light array.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
When the pattern generator lights the test lamp group, when the lighting time of each luminescence unit is first
Between, and interval time is lighted as the second time between the luminescence unit being disposed adjacent；
Wherein, the value of second time is more than the value of the first time.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
Relational expression between the first time and second time is：
T1=k*T2；
Wherein, T1 is the first time, and T2 is second time, and k is the positive number less than 1.
As a preferred embodiment, in the test method of above-mentioned video frame rate：
The k is 0.5.
Above-mentioned technical proposal has the following advantages that or advantageous effect：
The technical program tests luminescence unit in lamp group by gradually being promoted on pattern generator in digital end opposite equip.
Ignition frequency, and using video capturing device come in real time obtain test lamp group present image, with according to the image present it is quiet
The ignition frequency of lamp group is only tested during state to obtain the video frame rate of the pattern generator；The technical solution is simple, easily implements,
And with higher testing efficiency and reliability, and then it can effectively reduce the frame per second test of digital end opposite equip. whole system
Cost and the accuracy for promoting test substantially increase the efficiency of the whole picture signal test of digital end opposite equip..
Description of the drawings
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
It illustrates, and is not meant to limit the scope of the invention.
Fig. 1 is the flow chart of the test method of video frame rate in one embodiment of the invention；
Fig. 2 is the structure diagram of LED light array in one embodiment of the invention.
Specific embodiment
The specific embodiment of the present invention is further described below in conjunction with the accompanying drawings：
Fig. 1 is the flow chart of the test method of video frame rate in one embodiment of the invention, and Fig. 2 is in one embodiment of the invention
The structure diagram of LED light array；As shown in Fig. 1~2, a kind of test method of video array can be applied to such as without standard
Interface or transport protocol it is non-standard or take the digital end opposite equip. of encryption technology (such as house safety technological prevention product building reside
The equipment such as intercommunication) carry out whole picture signal test (it is above-mentioned to realize to test (Frame rate test) such as by frame per second
The test of whole picture signal), and the digital end opposite equip. may include the pattern generator by LED light array, the method
It may include；
First, the video capturing device for picture catching is provided；The video capturing device can be being capable of actual test need
The audio and video picture pick-up device such as video recorder (such as Video Disk Recorder (Video Disk Recorder, abbreviation VDR) etc.) asked.
Preferably, above-mentioned pattern generator may also include the programmable controller being connected with LED light array, should with control
Part or all of LED light carries out lighting test in LED light array；And LED light array then may include it is several equidistant according to ranks
The identical LED light of several performances of arrangement, as shown in Fig. 2, the LED light array may include the matrix arrangement totally 100 of 10*10
LED light 1.
Secondly, at least a portion LED light in above-mentioned LED light array is selected according to default condition and forms test lamp group,
And in the test lamp group it is that adjacent continuous is set successively in LED light array；It can extend in the LED light array along row or column
Direction select a row or column LED light as test lamp group or along with line direction or the oblique line that intersects of row select it is several according to
Secondary adjacent LED light is as test lamp group；The preferable test lamp group be arranged in order on the same line selected one group it is adjacent
LED light is as test lamp group.For example, as shown in Fig. 2, can the center of the matrix arrangement LED light array of above-mentioned 10*10 along
Line direction (such as horizontal direction) selectes 1*10 adjacent successively LED light as test lamp group 2 (choose one1*
10horizontal led array in the center of LED matrix to test)；
Further, above-mentioned test lamp group includes the luminescence unit that several continuous adjacents are set, each luminescence unit
In include at least a LED light, and for the ease of follow-up imaging observation, multiple continuous adjacents are included in each luminescence unit
The LED light of setting, the LED light as may each comprise four or five continuous adjacent settings in each luminescence unit, shines single certainly
The quantity of specific LED light can carry out accommodation according to actual video testing requirement in member.
Preferably, in same luminescence unit, all LED light same time when carrying out subsequently lighting test shines
Or close, i.e. a luminescence unit is to carry out video measurement as a luminous basic element.
Afterwards, using the selected test lamp group of above-mentioned pattern generator control along the test lamp group extending direction from one
It holds and lights each luminescence unit successively to the other end；The BIS audio/video communication circuits (initiate of LED light array can such as be connected
The BIS audio/video communication) so that lighting for test lamp group can be controlled using programmable controller
Frequency, to test pattern generator.
Further, when testing pattern generator, the point of test lamp group can be adjusted by programmable controller
Bright frequency, for example, adjustable pattern generator ignition frequency from 1 hertz (i.e. so that per second in test lamp group light one and shine
Unit, and the glittering time of each luminescence unit is 0.1s), the corresponding each luminescence unit tested in lamp group can be according to setting
Ignition frequency one by one be in (such as from the direction that extends to its afterbody of head of test lamp group) according to default direction
Visual effect (adjust the rate of LIG (f) from1Hz (each led is activated now moved gradually
once every second with a flash time of 1/(10f)s)upward so the 10LEDs will
move one by one horizontally according to the rate set)。
Meanwhile it when adjusting the ignition frequency of pattern generator, can also in real time be obtained using above-mentioned video capturing device
It tests the image that lamp group is presented, and video survey can be carried out by judging whether image that the test lamp group is presented is stationary state
Examination (step can artificial vision judge also by set a judgment module by obtain in real time analysis video capturing device catch
The image that obtains is realized)；For example, when obtaining the image of test lamp group in real time using video capturing device, figure is observed at this time
As mobile status should be presented, therefore the ignition frequency that can gradually promote pattern generator (can be set according to actual test demand
The frequency values adjusted every time, as according to the frequency that video equipment minimum can obtain or minimum frequency that can be distinguished etc. can be observed
Parameter is set, and can specifically promote 0.5Hz, 1Hz, 1.75Hz etc. every time)；Until stationary state is presented in the image of observation
When, the value of the ignition frequency of the pattern generator recorded at this time can be as the value of the video frame rate of digital end opposite equip..
As shown in Fig. 2, it can be set by visual observation or using image multilevel iudge device to detect video capture in real time
Whether the realtime graphic of standby upper acquisition is presented stationary state, such as observes or judges the luminescence unit lighted in above-mentioned test lamp group 2
When (LED light 1 set including four continuous adjacents) stops mobile, then it can stop increasing the ignition frequency of pattern generator, and
The value of current ignition frequency is recorded using the value of the video frame rate as pattern generator.Preferably, can stop observing image
It only moves (i.e. remains stationary state) and is maintained at preset time (preset time can be that a time preset is alternatively one
Specific time value, such as default any time value such as 5s, 10s, 12s or the 15s that can be in 5~15s of value or [5,
10] time threshold can specifically be set according to actual testing requirement) after, just record lighting for pattern generator at this time
Frequency, to ensure the real effectiveness of record value (watch the image on VRD and stop increasing the
rate of LIG when the LEDs appears to moving on VRD.This state must be
maintained over 10s to ensure its validity.Record the value of rate on
LIG.This value is the frame rate(fr)of EUT)。
Certainly, video capturing device is being detected in real time above by visual observation or using image multilevel iudge device
When whether the realtime graphic of upper acquisition is presented stationary state, such as observes or judge the luminescence unit lighted in above-mentioned test lamp group 2
When mobile status is presented in (LED light 1 set including four continuous adjacents), then can continue to lift up pattern generator lights frequency
Rate until stationary state is presented in realtime graphic, just stops being promoted the ignition frequency of pattern generator.
Further, if above-mentioned real-time graph can not maintain stationary state in preset time, can also continue to lift up
The ignition frequency of pattern generator, until realtime graphic is presented stationary state and keeps preset time.
Specifically, the lighting time for testing each luminescence unit in lamp group is set as T1, and adjacent light-emitting units interval time
For T2, and T2 is more than T1；And when using programmable controller test lamp group being controlled to be tested, it can be made by being gradually reduced T2
Lamp group must be tested, preset pattern is presented.
In addition, T1 and T2 can be in preset ratio relation during the test, i.e., T1 during the test subtracts also with T2's
It is small and reduce, increase or immobilize；The preferred preset ratio relation presented between T2 and T1 can be T1=k*T2, and k is
Positive number less than 1, such as k can be 0.5 when (when such as T2 is 100ms, for T1 then for 50ms, corresponding pattern generator lights week
Phase is then 100ms, and the frame per second of pattern generator is then 10fps at this time).
Middle video frame rate test method in the present embodiment and not merely suitable for digital building residence intercom system, you can right
It is all suitable in the delay test of conventional end-to-end non-standard interface, standard transmission agreement and encrypted transmission, number
Building residence intercom system is a preferred embodiment, is not limitation of the present invention.
In conclusion the present invention provides a kind of test method of video frame rate, the complete of digital end opposite equip. can be applied to
In the test of journey picture signal, and the digital end opposite equip. includes the pattern generator for being provided with LED light array, by LED
Several LED light are selected as test lamp group along preset direction on lamp array row, which includes multiple luminescence units, and each
Luminescence unit includes adjacent multiple LED light；And it is rearwardly arranged according to from its head along above-mentioned test lamp group extending direction
Order lights each luminescence unit successively；Afterwards, the ignition frequency of luminescence unit is gradually promoted, while utilizes image-capturing apparatus
Come in real time obtain test lamp group present figure, and when image capture device capture to test lamp group on luminescence unit image
When stationary state is presented, the ignition frequency on pictcure generator at this time is recorded, i.e. the value of the ignition frequency can be used as number
The value of the video frame rate of the end-to-end equipment of word, and then complete above-mentioned whole picture signal test.Due to the technical side of the present invention
Case is simple, easily implements, and with higher testing efficiency and reliability, and then it is entire effectively to reduce digital end opposite equip.
The frame per second testing cost of system and the accuracy for promoting test, the whole picture signal for substantially increasing digital end opposite equip. are surveyed
The efficiency of examination.
It should be appreciated that the present invention can be implemented in different forms, and it should not be construed as being limited to what is proposed here
Embodiment.On the contrary, providing these embodiments disclosure will be made thoroughly and complete, and will fully convey the scope of the invention to
Those skilled in the art.In the accompanying drawings, for clarity, the size and relative size in Ceng He areas may be exaggerated.From beginning to end
Same reference numerals represent identical element.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this field
It applies；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the disclosure above
Methods and technical content technical solution of the present invention is made many possible changes and modifications or be revised as equivalent variations etc.
Embodiment is imitated, this is not affected the essence of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within the present invention to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of technical solution protection.
Claims (10)
1. a kind of test method of video frame rate, which is characterized in that this method is applied to the whole image of digital end opposite equip.
In signal testing, and the digital end opposite equip. includes the pattern generator for being provided with LED light array, the described method includes：
Video capturing device is provided；
In selecting several LED light as test lamp group along preset direction on the LED light array, the test lamp group includes multiple
Luminescence unit, and each luminescence unit includes adjacent multiple LED light；
Each shine is lighted successively according to rearwardly putting in order from the test lamp group head along the test lamp group extending direction
Unit, while the image tested lamp group and presented is obtained in real time using the video capturing device；
Gradually promote the ignition frequency of the luminescence unit on the pattern generator；And
When stationary shape is presented in the image of the luminescence unit in the test lamp group that the video capturing device captures
During state, the ignition frequency on pattern generator at this time is recorded；
Wherein, using the value of the ignition frequency of record as the value of the video frame rate of the digital end opposite equip..
2. the test method of video frame rate as described in claim 1, which is characterized in that the method further includes：
Stationary state is presented in the image of the luminescence unit in the test lamp group that the video capturing device captures
When, stopping promotes the ignition frequency of the luminescence unit on the pattern generator；
Judge whether the motionless state of image remains stationary of the luminescence unit in the test lamp group reaches preset time；
If reaching preset time, the ignition frequency on pattern generator is recorded, and using the value of the ignition frequency as the number
The value of the video frame rate of the end-to-end equipment of word；
Otherwise, the ignition frequency of the luminescence unit on the pattern generator is continued to lift up.
3. the test method of video frame rate as claimed in claim 2, which is characterized in that the preset time is 5~15s.
4. the test method of video frame rate as claimed in claim 3, which is characterized in that the preset time is 10s.
5. the test method of video frame rate as described in claim 1, which is characterized in that in the method：
Each luminescence unit includes four or five LED light that adjacent continuous is set.
6. the test method of video frame rate as described in claim 1, which is characterized in that the pattern generator further includes programming
Controller；
The programmable controller is connected with the LED light array, to control the ignition frequency of the luminescence unit.
7. the test method of video frame rate as described in claim 1, which is characterized in that in the method：
The test lamp group is selected along the column direction or line direction of the LED light array.
8. the test method of video frame rate as claimed in claim 2, which is characterized in that in the method：
When the pattern generator lights the test lamp group, the lighting time of each luminescence unit is first time, and
Interval time is lighted as the second time between the luminescence unit being disposed adjacent；
Wherein, the value of second time is more than the value of the first time.
9. the test method of video frame rate as claimed in claim 8, which is characterized in that when the first time is with described second
Between between relational expression be：
T1=k*T2；
Wherein, T1 is the first time, and T2 is second time, and k is the positive number less than 1.
10. the test method of video frame rate as claimed in claim 9, which is characterized in that the k is 0.5.
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| CN110933397B (en) * | 2019-10-19 | 2021-05-18 | 中国航空工业集团公司洛阳电光设备研究所 | High-precision imaging delay testing device and method |
| CN112147439A (en) * | 2020-09-10 | 2020-12-29 | 北京罗克维尔斯科技有限公司 | Instrument detection method, device, equipment, storage medium and system |
| CN114210043B (en) * | 2021-12-15 | 2022-09-27 | 杨键 | Multi-dimensional shadow imaging method and system based on rope skipping movement |
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| CN100496133C (en) * | 2004-12-13 | 2009-06-03 | 武汉大学 | Method for testing audio and video frequency out of step of audio and video frequency coding-decoding system |
| CN100396108C (en) * | 2004-12-13 | 2008-06-18 | 武汉大学 | A method for testing video frame rate of video coding-decoding system |
| CN101368992B (en) * | 2007-08-15 | 2012-08-29 | 鸿富锦精密工业（深圳）有限公司 | Test system and method of video signal generator |
| CN101345892B (en) * | 2008-08-19 | 2012-10-31 | 北京中星微电子有限公司 | Video display method and system |
| CN201467383U (en) * | 2009-07-27 | 2010-05-12 | 北京汉邦高科数字技术有限公司 | Video frequency frame rate tester |
| CN103796005A (en) * | 2012-10-29 | 2014-05-14 | 腾讯科技（深圳）有限公司 | Video frame rate test method and device |
| CN102937480A (en) * | 2012-11-21 | 2013-02-20 | 广东欧珀移动通信有限公司 | Method, device and mobile terminal for detecting ambient light frequency |
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