CN105704485A - Display device performance parameter detection method and system - Google Patents

Display device performance parameter detection method and system Download PDF

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CN105704485A
CN105704485A CN201610074147.4A CN201610074147A CN105704485A CN 105704485 A CN105704485 A CN 105704485A CN 201610074147 A CN201610074147 A CN 201610074147A CN 105704485 A CN105704485 A CN 105704485A
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video sequence
display device
alignment
mosaic effect
cycle tests
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CN105704485B (en
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雷延强
罗忠辉
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

The invention relates to a display device performance parameter detection method and system. The method comprises the following steps: a first video sequence which is currently output is obtained from video sequences, output from a display device, of which the signal strength is a preset value; the first video sequence is subjected to aligning operation according to pre-stored test sequences; the signal strength of the aligned first video sequence is adjusted to a first signal strength; the first signal strength is a threshold signal strength, between a non-triggering strength for mosaic effect and a mosaic effect triggering strength, of the aligned first video sequence after the aligned first video sequence is output via the display device; performance parameters of the display device are determined according to the first signal strength. The display device performance parameter detection method and system can realize automatic detection of the performance parameters, manual adjustment is not needed, no extra hardware device is required, and low cost and high efficiency can be achieved.

Description

The performance parameter detection method of display device and system
Technical field
The present invention relates to signal detection technique field, particularly relate to performance parameter detection method and the system of a kind of display device。
Background technology
Display device is a kind of exportable image or the equipment of thoughts and feelings information。If input signal is electronic signal, this display device will be referred to as electronic display unit, and relative also has mechanical display device。Common display device includes television set, computer etc.。In order to ensure display device normal operation, it usually needs some performance parameters of display device are detected。For television set, the sensitivity of TV SKD is an important performance performance parameter of television set。
The scheme of existing detection TV SKD sensitivity is: sending video signal by special equipment, output, to TV SKD, is then then displayed on television screen；Whether emphasizing of tester's manual adjustment special equipment output signal, there is mosaic effect on view screen simultaneously。In the critical link that mosaic occurs, corresponding signal intensity is the sensitivity of this TV SKD。Also a kind of scheme is: directly obtained the bit error rate (form of expression of the bit error rate is mosaic effect) by decoding chip。The shortcoming of prior art is:
(1) adopting manual adjustment signal intensity, whether manual observation there is mosaic effect, and cost of labor is higher。
(2) calculating the bit error rate by chip, hardware cost is high。
In sum, prior art is high to the performance parameter testing cost of display device。
Summary of the invention
Based on this, it is necessary to for the problem that prior art cost is high, it is provided that the performance parameter detection method of a kind of display device and system。
The performance parameter detection method of a kind of display device, comprises the following steps:
The first video sequence of current output is obtained from the video sequence that signal intensity is preset value of display device output；
According to the cycle tests prestored, described first video sequence is carried out alignment operation；Wherein, the part that content is described cycle tests of described first video sequence；
The signal intensity of the first video sequence after alignment is adjusted to the first signal intensity；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
The performance parameter of described display device is determined according to described first signal intensity。
A kind of performance parameter detection system of display device, including:
Acquisition module, for obtaining the first video sequence of current output the video sequence that signal intensity is preset value from display device output；
Alignment module, for carrying out alignment operation according to the cycle tests prestored to described first video sequence；Wherein, the part that content is described cycle tests of described first video sequence；
Adjusting module, for being adjusted to the first signal intensity by the signal intensity of the first video sequence after alignment；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
Determine module, for determining the performance parameter of described display device according to described first signal intensity。
The performance parameter detection method of above-mentioned display device and system, by the video sequence that signal intensity is preset value that exports from display device obtains the first video sequence of current output, described first video sequence is carried out alignment operation, the signal intensity of the first video sequence after alignment is adjusted to after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect, and the performance parameter of described display device is determined according to this critical signal strength, it is capable of the automatic detection of described performance parameter, without manual adjustment, without extra hardware device, cost is low, efficiency is high。
Accompanying drawing explanation
Fig. 1 is the performance parameter detection method flow chart of the display device of the present invention；
Fig. 2 is the structural representation of the performance parameter detection system of the display device of the present invention。
Detailed description of the invention
Below in conjunction with accompanying drawing, the performance parameter detection method of the display device of the present invention and the embodiment of system are described。
Fig. 1 is the performance parameter detection method flow chart of the display device of the present invention。As it is shown in figure 1, the performance parameter detection method of described display device can comprise the following steps that
S1, obtains the first video sequence of current output from the video sequence that signal intensity is preset value of display device output；
In this step, described video sequence can be the video sequence that quality is higher, and wherein, described quality is higher can refer to that described signal intensity is signal intensity corresponding without mosaic effect after the decoding output of described display device。Can passing through control equipment and regulate video signal generation equipment, export, to described display device, the video signal that quality is higher, described display device to described decoding video signal, can obtain described video sequence。In general, signal intensity exceedes certain limit, and video quality is higher。
The first video sequence that described display device currently exports can be set as X=[x0,x1,...xn], wherein, xi, i=1,2 ... n is each frame in described video sequence。
S2, carries out alignment operation according to the cycle tests prestored to described first video sequence；Wherein, the part that content is described cycle tests of described first video sequence；
Described cycle tests can be set as Y=[y0,y1,...ym], wherein, yi, i=1,2 ... m is each frame in described cycle tests, m > > n。Described first video sequence can be a part for described cycle tests, but the signal intensity of described first video sequence can be different from the signal intensity of described cycle tests。
The output video signal that video signal generation equipment is lasting, but it and do not denote that the image in this moment is which frame in whole cycle tests。This step is by described first video sequence X and cycle tests Y=[y0,y1,...ym] (m > > n) alignment, in whole cycle tests, the position of described first video sequence is namely precisely located, thus being the ready work of subsequent operation。
The distance metric function between described first video sequence and described cycle tests can be calculated, and according to described distance metric function, described first video sequence is carried out alignment operation。Wherein, described distance metric function is for characterizing the similarity between described first video sequence and described cycle tests。Described distance metric function can be the function of arbitrary metric range, as long as satisfaction value is more little more similar。Described distance metric function can be calculated according to equation below:
d ( X , Y j ) = 1 n Σ k = 0 n d ( x k , y j + k ) - - - ( 1 )
In formula, X is described first video sequence, YjFor sequence isometric with the first video sequence in described cycle tests, d (X, Yj) for the distance metric function between described first video sequence and described cycle tests, n is the frame number of described first video sequence, xkFor the kth frame of video in described first video sequence, yj+kFor the jth+k in described cycle tests frame of video, k is the integer between 0 to n, and j is the constant between 0 to m-k, and m is the frame length of cycle tests。
Alignment operation can be carried out according to equation below:
J = argmin j d ( X , Y j ) - - - ( 2 )
In formula, X is described first video sequence, YjFor sequence isometric with the first video sequence in described cycle tests, d (X, Yj) for the distance metric function between described first video sequence and described cycle tests, J is the time unifying point of described first video sequence and described cycle tests, and j is the constant between 0 to m-k, and m is the frame length of cycle tests。
S3, is adjusted to the first signal intensity by the signal intensity of the first video sequence after alignment；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
Once after the first video sequence aligns with cycle tests, it is possible to take the mode contrasted frame by frame, it is determined that whether current time exists mosaic effect。If mosaic effect does not occur, can continue to adjust the signal intensity of the first video sequence, again judge whether that mosaic effect occurs；, until there is mosaic effect in so circulation。The first video sequence after described alignment can be set to the first signal intensity from without mosaic effect to critical signal strength mosaic effect occur。
Can judge whether the first video sequence after alignment mosaic effect occurs in the following manner:
Step 1: the frame of video of the first video sequence after alignment is divided into several nonoverlapping regions；
Step 2: calculate the quality evaluation function of regional the intensity of the mosaic effect according to the first video sequence after the quality evaluation function described alignment of calculating of regional；Wherein, described quality evaluation function is used for the picture quality of the first video sequence after characterizing described alignment；
Wherein, described quality evaluation function can be the arbitrary function for evaluation image quality, such as conventional PSNR (PeakSignaltoNoiseRatio, Y-PSNR), SSIM (structuralsimilarity, structural similarity) etc., as long as satisfaction value is more big more similar。In this way, it is possible to easy, obtain the picture quality of the first video sequence after described alignment neatly。
The intensity of described mosaic effect can be calculated according to equation below:
I = Σ k Σ a I ( t k a ) Σ k Σ a 1 - - - ( 3 )
Wherein,
In formula, I is the intensity of the mosaic effect of the first video sequence after described alignment,It is that 1 expression mosaic effect occurs,It is that 0 expression mosaic effect does not occur,For quality evaluation function,For a region of kth frame of video in the first video sequence after alignment,For a region of the kth frame of video of video sequence corresponding with described first video sequence in described cycle tests, thr1For default first threshold。
Step 3: whether the first video sequence after judging alignment according to the intensity of described mosaic effect mosaic effect occurs。
The intensity of described mosaic effect can be compared with the Second Threshold preset；If the intensity of described mosaic effect is more than described Second Threshold, can determine that mosaic effect occurs in the first video sequence after alignment；Otherwise, can determine that mosaic effect does not occur in the first video sequence after alignment。
S4, determines the performance parameter of described display device according to described first signal intensity。
Described first signal intensity can as the foundation of the performance parameter detecting described display device。Such as, can as the evaluation index of TV SKD sensitivity。
The performance parameter detection method of the display device of the present invention has the advantage that
(1) without whether manual adjustment signal intensity, manual observation mosaic effect occur, cost of labor is low, and method is easy, and efficiency is high。
(2) without extra hardware device, hardware cost is low。
Fig. 2 is the structural representation of the performance parameter detection system of the display device of the present invention。As in figure 2 it is shown, the performance parameter detection system of described display device comprises the steps that
Acquisition module 10, for obtaining the first video sequence of current output the video sequence that signal intensity is preset value from display device output；
Described video sequence can be the video sequence that quality is higher, and wherein, described quality is higher can refer to that described signal intensity is signal intensity corresponding without mosaic effect after the decoding output of described display device。Can passing through control equipment and regulate video signal generation equipment, export, to described display device, the video signal that quality is higher, described display device to described decoding video signal, can obtain described video sequence。In general, signal intensity exceedes certain limit, and video quality is higher。
The first video sequence that described display device currently exports can be set as X=[x0,x1,...xn], wherein, xi, i=1,2 ... n is each frame in described video sequence。
Alignment module 20, for carrying out alignment operation according to the cycle tests prestored to described first video sequence；Wherein, the part that content is described cycle tests of described first video sequence；
Described cycle tests can be set as Y=[y0,y1,...ym], wherein, yi, i=1,2 ... m is each frame in described cycle tests, m > > n。Described first video sequence can be a part for described cycle tests, but the signal intensity of described first video sequence can be different from the signal intensity of described cycle tests。
The output video signal that video signal generation equipment is lasting, but it and do not denote that the image in this moment is which frame in whole cycle tests。This step is by described first video sequence X and cycle tests Y=[y0,y1,...ym] (m > > n) alignment, in whole cycle tests, the position of described first video sequence is namely precisely located, thus being the ready work of subsequent operation。
The distance metric function between described first video sequence and described cycle tests can be calculated, and according to described distance metric function, described first video sequence is carried out alignment operation。Wherein, described distance metric function is for characterizing the similarity between described first video sequence and described cycle tests。Described distance metric function can be the function of arbitrary metric range, as long as satisfaction value is more little more similar。Described distance metric function can be calculated according to formula (1)。Then, video sequence alignment operation can be carried out according to formula (2)。
Adjusting module 30, for being adjusted to the first signal intensity by the signal intensity of the first video sequence after alignment；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
Once after the first video sequence aligns with cycle tests, it is possible to take the mode contrasted frame by frame, it is determined that whether current time exists mosaic effect。If mosaic effect does not occur, can continue to adjust the signal intensity of the first video sequence, again judge whether that mosaic effect occurs；, until there is mosaic effect in so circulation。The first video sequence after described alignment can be set to the first signal intensity from without mosaic effect to critical signal strength mosaic effect occur。
Adjusting module 30 can judge whether the first video sequence after aliging mosaic effect occurs in the following manner:
First, the frame of video of the first video sequence after alignment can be divided into several nonoverlapping regions；
Then, the quality evaluation function of regional the intensity of the mosaic effect according to the first video sequence after the quality evaluation function described alignment of calculating of regional can be calculated；Wherein, described quality evaluation function is used for the picture quality of the first video sequence after characterizing described alignment；
Wherein, described quality evaluation function can be the arbitrary function for evaluation image quality, such as conventional PSNR (PeakSignaltoNoiseRatio, Y-PSNR), SSIM (structuralsimilarity, structural similarity) etc., as long as satisfaction value is more big more similar。In this way, it is possible to easy, obtain the picture quality of the first video sequence after described alignment neatly。
The intensity of described mosaic effect can be calculated according to formula (3)。
Finally, whether the first video sequence after can judging alignment according to the intensity of described mosaic effect there is mosaic effect。
The intensity of described mosaic effect can be compared with the Second Threshold preset；If the intensity of described mosaic effect is more than described Second Threshold, can determine that mosaic effect occurs in the first video sequence after alignment；Otherwise, can determine that mosaic effect does not occur in the first video sequence after alignment。
Determine module 40, for determining the performance parameter of described display device according to described first signal intensity。
Described first signal intensity can as the foundation of the performance parameter detecting described display device。Such as, can as the evaluation index of TV SKD sensitivity。
The performance parameter detection system of the display device of the present invention has the advantage that
(1) without whether manual adjustment signal intensity, manual observation mosaic effect occur, cost of labor is low, and method is easy, and efficiency is high。
(2) without extra hardware device, hardware cost is low。
The performance parameter detection system of the display device of the present invention and the performance parameter detection method one_to_one corresponding of the display device of the present invention, above-mentioned display device performance parameter detection method embodiment set forth technical characteristic and beneficial effect all be applicable to display device performance parameter detection system embodiment, hereby give notice that。
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded。
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent。It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention。Therefore, the protection domain of patent of the present invention should be as the criterion with claims。

Claims (10)

1. the performance parameter detection method of a display device, it is characterised in that comprise the following steps:
The first video sequence of current output is obtained from the video sequence that signal intensity is preset value of display device output；
According to the cycle tests prestored, described first video sequence is carried out alignment operation；Wherein, the part that content is described cycle tests of described first video sequence；
The signal intensity of the first video sequence after alignment is adjusted to the first signal intensity；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
The performance parameter of described display device is determined according to described first signal intensity。
2. the performance parameter detection method of display device according to claim 1, it is characterised in that include according to the step that described first video sequence is carried out alignment operation by the cycle tests prestored:
Calculate the distance metric function between described first video sequence and described cycle tests；Wherein, described distance metric function characterizes described first video sequence and similarity between the sequence of corresponding length in described cycle tests；
According to described distance metric function, described first video sequence is carried out alignment operation。
3. the performance parameter detection method of display device according to claim 2, it is characterised in that the step calculating the distance metric function between described first video sequence and described cycle tests includes:
Described distance metric function is calculated according to equation below:
d ( X , Y j ) = 1 n Σ k = 0 n d ( x k , y j + k ) ,
In formula, X is described first video sequence, YjFor sequence isometric with the first video sequence in described cycle tests, d (X, Yj) for the distance metric function between described first video sequence and described cycle tests, n is the frame number of described first video sequence, xkFor the kth frame of video in described first video sequence, yj+kFor the jth+k in described cycle tests frame of video, k is the integer between 0 to n, and j is the constant between 0 to m-k, and m is the frame length of cycle tests。
4. the performance parameter detection method of display device according to claim 3, it is characterised in that include according to the step that described first video sequence is carried out alignment operation by described distance metric function:
Alignment operation is carried out according to equation below:
J = argmin j d ( X , Y j )
In formula, X is described first video sequence, YjFor sequence isometric with the first video sequence in described cycle tests, d (X, Yj) for the distance metric function between described first video sequence and described cycle tests, J is the time unifying point of described first video sequence and described cycle tests, and j is the constant between 0 to m-k, and m is the frame length of cycle tests。
5. the performance parameter detection method of display device according to claim 1, it is characterised in that the step that the signal intensity of the first video sequence after alignment is adjusted to the first signal intensity is included:
Judge whether the first video sequence after alignment mosaic effect occurs；
If there is not mosaic effect, then adjusting the signal intensity of the first video sequence after alignment, the first video sequence after described alignment stops when there is mosaic effect, and corresponding signal intensity is set to described first signal intensity。
6. the performance parameter detection method of display device according to claim 5, it is characterised in that described first signal intensity is that the first video sequence after described alignment is from without mosaic effect to critical signal strength mosaic effect occur。
7. the performance parameter detection method of display device according to claim 5, it is characterised in that judge whether the first video sequence after alignment occurs that the step of mosaic effect includes:
The frame of video of the first video sequence after alignment is divided into several nonoverlapping regions；
Calculate the quality evaluation function of regional the intensity of the mosaic effect according to the first video sequence after the quality evaluation function described alignment of calculating of regional；Wherein, the picture quality of the first video sequence after the described alignment of described quality evaluation function sign；
Intensity according to described mosaic effect judges whether the first video sequence after aliging mosaic effect occurs。
8. the performance parameter detection method of display device according to claim 7, it is characterised in that the step of the intensity of the mosaic effect of the first video sequence after calculating described alignment according to the quality evaluation function of regional includes:
The intensity of described mosaic effect is calculated according to equation below:
I = Σ k Σ a I ( t k a ) Σ k Σ a 1 ,
Wherein,
In formula, I is the intensity of the mosaic effect of the first video sequence after described alignment,For quality evaluation function,For a region of kth frame of video of the first video sequence after alignment,For a region of the kth frame of video of video sequence corresponding with described first video sequence in described cycle tests, thr1For default first threshold。
9. the performance parameter detection method of display device according to claim 7, it is characterised in that whether the first video sequence after judging alignment according to the intensity of described mosaic effect occurs that the step of mosaic effect includes:
The intensity of described mosaic effect is compared with the Second Threshold preset；
If the intensity of described mosaic effect is more than described Second Threshold, then there is mosaic effect in the first video sequence after judging alignment；Otherwise, it is determined that there is not mosaic effect in the first video sequence after alignment。
10. the performance parameter detection system of a display device, it is characterised in that including:
Acquisition module, for obtaining the first video sequence of current output the video sequence that signal intensity is preset value from display device output；
Alignment module, for carrying out alignment operation according to the cycle tests prestored to described first video sequence；Wherein, the part that content is described cycle tests of described first video sequence；
Adjusting module, for being adjusted to the first signal intensity by the signal intensity of the first video sequence after alignment；Wherein, described first signal intensity be the first video sequence after described alignment after described display device exports without mosaic effect and the critical signal strength that occurs between mosaic effect；
Determine module, for determining the performance parameter of described display device according to described first signal intensity。
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CN106572387A (en) * 2016-11-09 2017-04-19 广州视源电子科技股份有限公司 Video sequence alignment method and video sequence alignment system
CN106612457A (en) * 2016-11-09 2017-05-03 广州视源电子科技股份有限公司 Method and system for video sequence alignment
CN106657996A (en) * 2016-11-09 2017-05-10 广州视源电子科技股份有限公司 Performance parameter detection method and system of display equipment
WO2018086231A1 (en) * 2016-11-09 2018-05-17 广州视源电子科技股份有限公司 Method and system for video sequence alignment
CN106657996B (en) * 2016-11-09 2019-03-26 广州视源电子科技股份有限公司 Show the performance parameter detection method and system of equipment
CN106612457B (en) * 2016-11-09 2019-09-03 广州视源电子科技股份有限公司 Video sequence alignment schemes and system
CN106572387B (en) * 2016-11-09 2019-09-17 广州视源电子科技股份有限公司 Video sequence alignment schemes and system

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