SJ/T 11590-2025 (SJ/T 11590-2016) PDF English
US$425.00 · In stock · Download in 9 secondsSJ/T 11590-2016: A subjective method for the evaluation of the displaying quality of LED displays Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid SJ/T 11590: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| SJ/T 11590-2025 | English | RFQ |
ASK
|
3 days
|
Subjective assessment method for image quality of LED display
| Valid |
| SJ/T 11590-2016 | English | 425 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
A subjective method for the evaluation of the displaying quality of LED displays
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: SJ/T 11590-2016
SJ/T 11590-2016: A subjective method for the evaluation of the displaying quality of LED displays---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/SJT11590-2016
SJ
ELECTRONIC INDUSTRY STANDARD
ICS 31.120
L 63
Filing No..
A subjective method for the evaluation of the
displaying quality of LED displays
Issued on. JANUARY 15, 2016
Implemented on. JUNE 01, 2016
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Basic conditions and scoring criteria... 5
5 Testing and evaluation... 7
6 Evaluation procedures and guidelines... 13
Appendix A (Normative) List of formats of test file number... 15
Appendix B (Normative) Scoring table by times... 16
Appendix C (Normative) Summary of scores by observer... 19
Appendix D (Normative) Weight and score of evaluation item... 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that certain contents of this standard may involve patents. The
issuing organization of this standard does not bear the responsibility for
identifying these patents.
This standard shall be under the jurisdiction of the Electronics Industry
Standardization Research Institute of the Ministry of Industry and Information
Technology.
Drafting organizations of this standard. Shanghai Sansi Technology
Development Co., Ltd., Xi'an Qingsong Technology Co., Ltd., Shenzhen
Lianjian Optoelectronics Co., Ltd., Nanjing Luopu Co., Ltd.
The main drafters of this standard. Cheng Deshi, Li Dahong, Xu Yongfu, Liu
Hanping, Lan Lan.
A subjective method for the evaluation of the
displaying quality of LED displays
1 Scope
This standard specifies the subjective evaluation method for the displaying
quality of LED displays.
This standard applies to the subjective evaluation, of the displaying quality of
indoor and outdoor full-color LHD displays, that are broadcast and controlled
by a computer AND mainly display video images, animations, pictures.
This standard does not apply to LED displays, that mainly display text
information, such as variable information signs, urban traffic guidance signs,
bank and securities market information.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 7401-1987 Method of subjective assessment of quality of color TV
pictures
SJ/T 11141-2012 Generic specification for LED panels
SJ/T 11281-2007 Test methods of LED panels
3 Terms and definitions
3.1
Subjective evaluation
A method, that directly uses the observer's subjective reaction to the image
of the system under test, to determine the performance of the system under
test.
3.2
Quality evaluation
A subjective evaluation of the performance of the tested display system,
under certain viewing conditions.
3.3
Test image
An image or image sequence, which has specific requirements on the image
material, AND is used for the subjective evaluation of the system under test.
3.4
Rating scale
The scoring scale, which is used in subjective evaluation.
4 Basic conditions and scoring criteria
4.1 Basic observation conditions
Unless otherwise specified, subjective evaluation shall be carried out under the
conditions, which are specified in Table 1.When other observation conditions
are required for individual specific evaluation items, they shall be explained
separately in the evaluation items.
4.2 Test material
A set of discs, which contain static images and moving images, of different
resolutions. During evaluation, select the appropriate test image resolution,
according to the resolution and aspect ratio of the display.
4.4 Scoring criteria
It adopts a five-level subjective image quality evaluation method. Table 2 shows
the corresponding relationship, between the subjective evaluation and the
score.
5 Testing and evaluation
5.1 Definition of static image
According to the resolution of the display under test, select a set of sharpness
test card SD-01 and SD-02, which is suitable for its resolution AND can reflect
the details of the image.
5.2 Definition of moving images
According to the resolution of the tested display, select a group of dynamic
definition test videos MD-01 ~ MD-02, that are suitable for its resolution AND
can reflect the definition of the moving image. Observe from the front, on
whether the license plate of the car, which is driving at high speed, is identifiable;
whether the face of athletes, who is running, is clearly identifiable; whether there
is obvious tailing phenomenon.
5.5 Assembly precision
Under the condition that the 128-level full-white image test card (W-128) is
displayed on the full screen, observe from the front and side, respectively, on
whether there are bright lines, which are higher than normal brightness, OR
dark lines, which are lower than normal brightness, at the joints of the module
and cabinet. It will be evaluated, according to the quality degree. See Table 7,
for the scoring of assembly precision.
5.7 Grayscale performance 2 (false contour phenomenon)
According to the resolution of the display under test, display the "round moon"
video test file MOON-01; the ambient brightness is the low value under the
conditions of use.
5.8 Flyback line or stroboscopic phenomenon
Select the horizontal bar test image (the bar height is greater than 64 pixels)
HLINE-01, that can display non-grayscale (dark, low-bright, medium-bright,
high-bright). The observer observes the display, by clicking teeth, shaking
heads (nodding), blink, shaking the palm of hand, etc.
5.9 Virtual image phenomenon
The test image DLINE-01 (low-density diagonal stripes), which shows the white
diagonal stripes on a black background; the ambient brightness is the low value
under the conditions of use; the observation distance is about 1000 times the
pixel pitch.
5.10 Image stability
On the test image DLINE-02 (high-density diagonal stripes), which shows white
diagonal stripes on black background, observe whether the displayed image
has unstable phenomena such as jitter, fluctuation, bounce, twitch. According
to the degree of instability, make grading and scoring. See Table 12 for the
scoring of image stability.
6 Evaluation procedures and guidelines
6.1 Test broadcast control device
The standard output interface of the test broadcast control device is DVI or
HDMI. If there are N displays, for comparison and evaluation, it must use a DVI
splitter or HDMI splitter with N interfaces, that meets the requirements of N
displays working at the same time.
6.3 Scoring steps for observation evaluation
Perform two evaluation scoring on the display. The content and methods of
these two evaluations are the same. See Appendix B for the scoring table for
each time; summarize the scoring according to Appendix C. The specific steps
for scoring are as follows.
6.4 Scoring criteria
6.4.1 Criteria 1 (eliminate invalid scores for individual stage deviations)
When an observer gives a score, which differs two or more grades, to the same
image of the same display, under the same observation conditions, in the two
test stages, the individual score is judged to be an invalid score for stage
deviation.
6.4.2 Criteria 2 (eliminate invalid scores for individual extreme deviations)
According to criteria 1, after removing the invalid score of the individual stage
deviation, the highest score of the two totals of the single item AND the lowest
score of the two totals of the single item, in the remaining scores, are judged as
the invalid score of the extreme value deviation of this single item.
6.4.5 Criteria 5 (Determine the final total score)
The final individual scores of all evaluation items of the evaluated display are
summed, to obtain the final total score of the display.
SJ/T 11590-2016
SJ
ELECTRONIC INDUSTRY STANDARD
ICS 31.120
L 63
Filing No..
A subjective method for the evaluation of the
displaying quality of LED displays
Issued on. JANUARY 15, 2016
Implemented on. JUNE 01, 2016
Issued by. Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Basic conditions and scoring criteria... 5
5 Testing and evaluation... 7
6 Evaluation procedures and guidelines... 13
Appendix A (Normative) List of formats of test file number... 15
Appendix B (Normative) Scoring table by times... 16
Appendix C (Normative) Summary of scores by observer... 19
Appendix D (Normative) Weight and score of evaluation item... 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
Please note that certain contents of this standard may involve patents. The
issuing organization of this standard does not bear the responsibility for
identifying these patents.
This standard shall be under the jurisdiction of the Electronics Industry
Standardization Research Institute of the Ministry of Industry and Information
Technology.
Drafting organizations of this standard. Shanghai Sansi Technology
Development Co., Ltd., Xi'an Qingsong Technology Co., Ltd., Shenzhen
Lianjian Optoelectronics Co., Ltd., Nanjing Luopu Co., Ltd.
The main drafters of this standard. Cheng Deshi, Li Dahong, Xu Yongfu, Liu
Hanping, Lan Lan.
A subjective method for the evaluation of the
displaying quality of LED displays
1 Scope
This standard specifies the subjective evaluation method for the displaying
quality of LED displays.
This standard applies to the subjective evaluation, of the displaying quality of
indoor and outdoor full-color LHD displays, that are broadcast and controlled
by a computer AND mainly display video images, animations, pictures.
This standard does not apply to LED displays, that mainly display text
information, such as variable information signs, urban traffic guidance signs,
bank and securities market information.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) is applicable to this standard.
GB/T 7401-1987 Method of subjective assessment of quality of color TV
pictures
SJ/T 11141-2012 Generic specification for LED panels
SJ/T 11281-2007 Test methods of LED panels
3 Terms and definitions
3.1
Subjective evaluation
A method, that directly uses the observer's subjective reaction to the image
of the system under test, to determine the performance of the system under
test.
3.2
Quality evaluation
A subjective evaluation of the performance of the tested display system,
under certain viewing conditions.
3.3
Test image
An image or image sequence, which has specific requirements on the image
material, AND is used for the subjective evaluation of the system under test.
3.4
Rating scale
The scoring scale, which is used in subjective evaluation.
4 Basic conditions and scoring criteria
4.1 Basic observation conditions
Unless otherwise specified, subjective evaluation shall be carried out under the
conditions, which are specified in Table 1.When other observation conditions
are required for individual specific evaluation items, they shall be explained
separately in the evaluation items.
4.2 Test material
A set of discs, which contain static images and moving images, of different
resolutions. During evaluation, select the appropriate test image resolution,
according to the resolution and aspect ratio of the display.
4.4 Scoring criteria
It adopts a five-level subjective image quality evaluation method. Table 2 shows
the corresponding relationship, between the subjective evaluation and the
score.
5 Testing and evaluation
5.1 Definition of static image
According to the resolution of the display under test, select a set of sharpness
test card SD-01 and SD-02, which is suitable for its resolution AND can reflect
the details of the image.
5.2 Definition of moving images
According to the resolution of the tested display, select a group of dynamic
definition test videos MD-01 ~ MD-02, that are suitable for its resolution AND
can reflect the definition of the moving image. Observe from the front, on
whether the license plate of the car, which is driving at high speed, is identifiable;
whether the face of athletes, who is running, is clearly identifiable; whether there
is obvious tailing phenomenon.
5.5 Assembly precision
Under the condition that the 128-level full-white image test card (W-128) is
displayed on the full screen, observe from the front and side, respectively, on
whether there are bright lines, which are higher than normal brightness, OR
dark lines, which are lower than normal brightness, at the joints of the module
and cabinet. It will be evaluated, according to the quality degree. See Table 7,
for the scoring of assembly precision.
5.7 Grayscale performance 2 (false contour phenomenon)
According to the resolution of the display under test, display the "round moon"
video test file MOON-01; the ambient brightness is the low value under the
conditions of use.
5.8 Flyback line or stroboscopic phenomenon
Select the horizontal bar test image (the bar height is greater than 64 pixels)
HLINE-01, that can display non-grayscale (dark, low-bright, medium-bright,
high-bright). The observer observes the display, by clicking teeth, shaking
heads (nodding), blink, shaking the palm of hand, etc.
5.9 Virtual image phenomenon
The test image DLINE-01 (low-density diagonal stripes), which shows the white
diagonal stripes on a black background; the ambient brightness is the low value
under the conditions of use; the observation distance is about 1000 times the
pixel pitch.
5.10 Image stability
On the test image DLINE-02 (high-density diagonal stripes), which shows white
diagonal stripes on black background, observe whether the displayed image
has unstable phenomena such as jitter, fluctuation, bounce, twitch. According
to the degree of instability, make grading and scoring. See Table 12 for the
scoring of image stability.
6 Evaluation procedures and guidelines
6.1 Test broadcast control device
The standard output interface of the test broadcast control device is DVI or
HDMI. If there are N displays, for comparison and evaluation, it must use a DVI
splitter or HDMI splitter with N interfaces, that meets the requirements of N
displays working at the same time.
6.3 Scoring steps for observation evaluation
Perform two evaluation scoring on the display. The content and methods of
these two evaluations are the same. See Appendix B for the scoring table for
each time; summarize the scoring according to Appendix C. The specific steps
for scoring are as follows.
6.4 Scoring criteria
6.4.1 Criteria 1 (eliminate invalid scores for individual stage deviations)
When an observer gives a score, which differs two or more grades, to the same
image of the same display, under the same observation conditions, in the two
test stages, the individual score is judged to be an invalid score for stage
deviation.
6.4.2 Criteria 2 (eliminate invalid scores for individual extreme deviations)
According to criteria 1, after removing the invalid score of the individual stage
deviation, the highest score of the two totals of the single item AND the lowest
score of the two totals of the single item, in the remaining scores, are judged as
the invalid score of the extreme value deviation of this single item.
6.4.5 Criteria 5 (Determine the final total score)
The final individual scores of all evaluation items of the evaluated display are
summed, to obtain the final total score of the display.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
|