This standard specifies the general technical requirements for editing and producing subjective evaluation program sources for television broadcast receivers and the corresponding program source content. This standard is applicable to editing and producing standard samples of subjective evaluation program sources for television sets, and using program source samples to conduct subjective evaluation of television image and sound quality. GB/T 15639-1995 Subjective Evaluation Program Sources for Television Broadcast Receivers GB/T15639-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
GB/T15639—1995
Subjective assessment for
television broadcast receiversPromulgated on July 24, 1995
State Administration of Technical Supervision
Implementation on March 1, 1996
National Standard of the People's Republic of China
Subjective assessment for
television broadcast receivers1 Subject content and scope of application
GB/T15639—1995
This standard specifies the general technical requirements for the editing and production of subjective assessment program sources for television broadcast receivers (hereinafter referred to as televisions), as well as the corresponding program source content.
This standard is applicable to editing and producing standard samples of subjective evaluation program sources for television sets, and using standard samples of program sources to conduct subjective evaluation of the image and sound quality of television sets.
2 Reference standards
Color television broadcast test chart
GB2097
GB3174Color television broadcast
GB3175.4Transmissive skin color test chart
GB317625.4Recording and exchange of mm television program tapesSubjective test evaluation method for television broadcast receiversGB9379
GSBM61001Standard sample of program source for subjective evaluation of sound quality of electroacoustic products3 Terminology
3.1 Subjective assessment of picture qualityJudgment of the image quality level of a television set by visual inspection. 3.2 Subjective assessment of sound quality Subjective assessment of sound quality of a television set is determined by hearing. 3.3 Typical program typical program
A program that can represent the characteristics of a certain type of program and facilitates subjective evaluation of the image and sound quality of a television set. 3.4 Original type of typical program Various typical programs recorded in accordance with the requirements of Chapter 4 of this standard and used to make program source masters. 3.5 Master typical program edited and produced by the original typical program in accordance with the sequence of Chapter 5 and only used to copy the program source application version. 3.6 Application type of program source Program source copied from the program source master and directly used for subjective evaluation of the image and sound quality of a television set. 3.7 Program segment programs sequence
In the subjective evaluation program source, the image or sound of different plots and contents presented continuously. Approved by the State Bureau of Technical Supervision on July 24, 1995 and implemented on March 1, 1996
4 Requirements for the original content of typical programs
GB/T15639-1995
Should include the program segments of the typical program with the machine tuning signal, image and accompanying sound. 4.1 Requirements for program segments for subjective evaluation of image quality 4.1.1 For each program segment in the subjective evaluation of image quality, the accompanying sound content should not distract the evaluation personnel. 4.1.2 The plot content of the image should not distract the evaluation personnel. 4.1.3 It should include test signals, still images, moving images and other contents. The color and picture structure of the selected image should have a certain degree of sensitivity to different distortions. 4.1.4
4.1.5 It should include common colors, such as skin color, sky blue, grass green and red flag color. There should be different average brightness, contrast, different richness of details and different picture structures, such as indoor, 4.1.6
outdoor, distant view, medium view, close view, characters, scenery, many details, medium details, few details and complex, simple, bright and dark backgrounds. 4.1.7 There should be multiple tones and more saturation levels. 4.2 Requirements for program segments for subjective evaluation of accompaniment quality 4.2.1 The program segments selected from GSBM61001 should include male and female voices, instrumental music, vocal music, etc. All program segments are two-channel stereo signals and have good mono compatibility. 4.2.2
The image content should not distract the evaluator's attention. 5 Requirements for the content of the program source master
For the content of the program source master tuning signal and tuning instructions, see Table 15.1
Table 1 Contents of the program source master tuning signal and tuning instructions Serial number
Tuning signal classification
Color test chart (PM5534 color test
Generated by signal generator)
Skin color test chart (see GB3175.4)
Accompanying sound content
1kHz single tone
Tuning instructions
Achieve the best reception state on the given channel, and adjust the contrast and brightness knobs to make the image reach the best state. Adjust the color saturation knob to make the image skin color reach the best reproduction state
5.2 For the content of the program source master program segment and the main evaluation elements, see Table 2. Table 2 Contents and main evaluation factors of program source master program segments Serial number
Program segment classification
Test signal
Image content
Color TV broadcast test pattern (see GB2097) Black and white test pattern
Cross grid and circle signal
Dot grid test pattern
Chessboard test pattern
Accompanying sound content
Light music
Main evaluation factors
Geometric distortion, clarity, grayscale reproduction, overlap between brightness and chromaticity components, etc.
Image reproduction rate (including geometric center deviation), geometric distortion, etc.
Focus, convergence
Geometric distortion
Program segment classification
Test signal
Still image
Moving image||tt ||Natural sound
Image content
Step test chart
10% white field signal
GB/T15639—1995
Continued Table 2
Accompanying sound content
Main evaluation factors
Grayscale adjustment, grayscale reproduction
Dark balance, image interference (interference of grating under dark field)
Skin color test chart (see GB3175.4)
Girl’s portrait
Vase and bouquet
Stage characters
Street scenery
Ancient buildings (near, medium and distant views), flowers, trees, snow, water (medium and distant views), animals, indoor characters, solo, stage plays, etc.
Color test chart
Note: The program time is for reference only.
Light music
Or accompaniment related to the image
Male recitation
Female recitation
Piano solo
Woodwind quartet
Children's chorus
Color satisfaction (skin color) Clarity
Color satisfaction, overlap between brightness and chromaticity components, etc.
Grayscale reproduction, grayscale tuning, image interference (background noise, fringing)
Grayscale tuning, image interference (background noise) Clarity, ghosting, brightness Overlap between chromaticity components, etc.
Grayscale reproduction, convergence, clarity, etc.
Color satisfaction
Color satisfaction, grayscale coordination, overall image quality
Sound clarity Fullness, brightness, strength Overall sound quality (realism, stereoscopic feeling, etc.) Sound interference (hum, noise, machine vibration, etc.) Time
Program source version production and delivery
GB/T15639—1995
Program source version production and delivery requirements are shown in Appendix A (supplement). Evaluation items and requirements
Evaluation items and requirements are shown in Appendix B (reference). 4
A1 Requirements for equipment, systems and instruments
GB/T15639—1995
Appendix A
Production and delivery of program source copies
(Supplement)
A1.1 The equipment used for the production of typical program originals and program source masters must be radio and television dedicated equipment. The recording of programs must comply with the requirements of GB3176.
A1.2 The production of program source application copies should use recording equipment that is not less than quasi-broadcast level. A2 Number and use of program source master tapes
A2.1 The number of program source masters shall be at least two sets. A2.2 The program source master tape can only be used to copy the program source application version and cannot be used for evaluating the program source. A3 Use and preservation of the program source application version
A3.1 The playback equipment for replaying the program source application version should not be lower than the quasi-broadcast level. Before replaying the program, a strict inspection should be carried out to prevent damage to the program source. In subjective test evaluation, if it is necessary to simulate the radio signal, the radio frequency modulation should be carried out according to the provisions of GB3174 to generate the required channel and the signal level should be selected according to the provisions of GB9379. A3.2 Environmental conditions for the storage of the program source application version: Ambient temperature: 15~35℃;
Relative humidity: 45%~65%
There is no strong electromagnetic field around the environment that affects the tape. A4 Publication of the program source application version
The publishing unit of the program source application version must be technically certified by the State Bureau of Technical Supervision. Copying of the program source application version is strictly prohibited. Appendix B
Program source description and evaluation requirements
(reference)
B1 Evaluation items and requirements
Evaluation items and requirements are shown in Table B1.
Table B1 Evaluation items and requirements
Evaluation items
Test signal
Test chart (full-field monochrome signal)
Dot grid test chart
Evaluation requirements
Any part of the red, green and blue primary color gratings should not be color-biased. Horizontal and vertical white lines should not have obvious color separation. 5
Evaluation items
Overlap between brightness and chromaticity components
Grayscale adjustment
Color satisfaction
Clearance
Grayscale reproduction
Geometric distortion and
Image reproduction rate
Sound interference
Image interference
Total image quality
Total sound quality||tt ||Overall reproduction quality
GB/T15639—1995
Continued Table B1
Test signal
Color test pattern
Step signal, color test pattern
Still and moving images
Black and white test pattern Still and moving images
Step signal Color and black and white test pattern
Test pattern Cross and circle signal
Moving image signal accompanied by music, text or
language
Test pattern Still and moving images
Still and moving images
Test pattern Moving images
Various evaluation program segments
Various program contents
Note: For black and white TVs, evaluation starts from item 6. B2 Subjective evaluation instructions for still images
B2.1 Skin color test chart
Evaluation requirements
The colored parts and their outlines should overlap without separation. The black and white images should not be obviously colored
The colors are bright and pleasing to the eye, and the skin colors are natural and harmonious. The image details are discernible and the outlines are clear. There is no border or tailing on the edges of the image, and the horizontal line structure is clearly outlined
The black and white grayscale levels can be reproduced evenly. The horizontal and vertical parts of each part of the screen maintain approximately unchanged linearity, without deformities on the edges, and the straight lines have no bends, waves or angles. The image amplitude reaches the full screen and has sufficient reproduction rate
The accompanying sound signal-to-noise ratio is high, and there should be no field frequency sound, AC sound, metal sound, click, machine vibration, etc.
The image has a high signal-to-noise ratio, no rolling bars or black bands in the background brightness, no vertical bright bars in the grating, no horizontal interference with the change of the accompanying sound, no dot-shaped or mesh-shaped brightness patterns, no irregular jumps and motions in the image, no obvious wave-like motion in the static part of the image, no ghosting, and no fringing
The comprehensive effect of viewing the image is clear and stable, the color is satisfactory and realistic, and there is no color cast and noise interference
The comprehensive effect of listening to the accompanying sound is excellent, the bass is full, the treble is clear, there is no noise interference, and the three-dimensional sense is strong
Comprehensive evaluation of the image and accompanying sound quality
It is mainly used to observe the restoration of skin color and common colors, and the sharpness of the image can also be observed from the texture of hair and sweater, petals, etc. B2.2 Girl's head portrait
This is a close-up picture of a person with medium to high average brightness and rich brightness levels. The female skin color area in the picture is large, and the colors of the background, scarf, and clothes are common colors. The restoration of skin color and common colors directly reflects the impact of color, brightness and brightness gain difference on the color quality of the image. The background and red scarf have uniform tones. The area is large, so the influence of random clutter can be observed. The strong contrast between the blue background and the yellow clothes makes the outline of the figure particularly clear. The outline of the figure can be used to observe the distortion of echo and brightness delay difference. B2.3 Vase and bouquet
GB/T15639—1995
This is a picture of a vase and bouquet with low average brightness, rich dark levels and brightness details. The background in the picture is clearly layered, and the brightness and darkness of the bouquet and vase are clear. The grayscale level can be observed by the background, and the balance adjustment of brightness and darkness and the image clarity can be observed by the bouquet and vase.
B2.4 Stage characters
This is a panoramic picture of stage characters with low average brightness, rich dark levels and bright details. The background brightness in the picture is low, and the brightness levels of the dark part are rich. It is easy to clearly observe from the background how the dark level and details of the image are affected when random clutter interferes with the image. The soldiers have bright colors that can reflect the distortion of brightness and chromaticity and fine color patterns that can reflect the overlap of bright and one-color signals. The fine patterns are very sensitive to changes in image clarity. In addition, the background brightness in the picture is low, and the recovery ability of the DC component can be observed. B2.5 Street Scenery
This is a street view picture with high average brightness and rich details. The picture contains a variety of common colors, especially sky blue, plant green and light khaki. Their changes can reflect the distortion of color and brightness, as well as the impact of the transition response of the brightness signal on the image quality. The uniform blue sky as the background sets off the clear outline of the trapezoidal building. The ghosting caused by the echo distortion is easily reflected on this bright wheel line. In addition, there are several red and blue road signs in the picture that can reflect the changes in image clarity and the overlap between bright and one-color signals. They have high color saturation.
B2.6 Seaside
It can be used to observe the depth of field of the whole picture and the realism of the water surface, and through the ripples on the water surface, it is possible to clearly observe the comprehensive characteristics such as resolution, focus and color grayscale. The color of the distant forest is difficult to reproduce and should be carefully observed. The olive pole of the yacht is suitable for observing the transition response. The fruits and underwater breathing apparatus in the near distance can be observed to see whether these items can be reproduced realistically. B2.7 Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The color of each fruit is a common color and the color is eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on the color quality of the image. Various fruits have bright and clear color edges and form a strong color contrast. These edges are sensitive to the distortion and saturation adjustment of the echo and bright-color delay difference.
B3 Color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional Notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the TV Drama Production Center of China Central Television. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai.2 Environmental conditions for storage of program source application version: Ambient temperature: 15~35℃;
Relative humidity: 45%~65%
There is no strong electromagnetic field around the environment that affects the tape. A4 Publication of program source application version
The publishing unit of the program source application version must be technically certified by the State Bureau of Technical Supervision. Copying of the program source application version is strictly prohibited. Appendix B
Program source description and evaluation requirements
(reference)
B1 Evaluation items and requirements
See Table B1 for evaluation items and requirements.
Table B1 Evaluation items and requirements
Evaluation items
Test signal
Test chart (full-field monochrome signal)
Dot grid test chart
Evaluation requirements
Any part of the red, green and blue primary color gratings should not be color-biased. Horizontal and vertical white lines should not have obvious color separation. 5
Evaluation items
Overlap between brightness and chromaticity components
Grayscale adjustment
Color satisfaction
Clearance
Grayscale reproduction
Geometric distortion and
Image reproduction rate
Sound interference
Image interference
Total image quality
Total sound quality||tt ||Overall reproduction quality
GB/T15639—1995
Continued Table B1
Test signal
Color test pattern
Step signal, color test pattern
Still and moving images
Black and white test pattern Still and moving images
Step signal Color and black and white test pattern
Test pattern Cross and circle signal
Moving image signal accompanied by music, text or
language
Test pattern Still and moving images
Still and moving images
Test pattern Moving images
Various evaluation program segments
Various program contents
Note: For black and white TVs, evaluation starts from item 6. B2 Subjective evaluation instructions for still images
B2.1 Skin color test chart
Evaluation requirements
The colored parts and their outlines should overlap without separation. The black and white images should not be obviously colored
The colors are bright and pleasing to the eye, and the skin colors are natural and harmonious. The image details are discernible and the outlines are clear. There is no border or tailing on the edges of the image, and the horizontal line structure is clearly outlined
The black and white grayscale levels can be reproduced evenly. The horizontal and vertical parts of each part of the screen maintain approximately unchanged linearity, without deformities on the edges, and the straight lines have no bends, waves or angles. The image amplitude reaches the full screen and has sufficient reproduction rate
The accompanying sound signal-to-noise ratio is high, and there should be no field frequency sound, AC sound, metal sound, click, machine vibration, etc.
The image has a high signal-to-noise ratio, no rolling bars or black bands in the background brightness, no vertical bright bars in the grating, no horizontal interference with the change of the accompanying sound, no dot-shaped or mesh-shaped brightness patterns, no irregular jumps and motions in the image, no obvious wave-like motion in the static part of the image, no ghosting, and no fringing
The comprehensive effect of viewing the image is clear and stable, the color is satisfactory and realistic, and there is no color cast and noise interference
The comprehensive effect of listening to the accompanying sound is excellent, the bass is full, the treble is clear, there is no noise interference, and the three-dimensional sense is strong
Comprehensive evaluation of the image and accompanying sound quality
It is mainly used to observe the restoration of skin color and common colors, and the sharpness of the image can also be observed from the texture of hair and sweater, petals, etc. B2.2 Girl's head portrait
This is a close-up picture of a person with medium to high average brightness and rich brightness levels. The female skin color area in the picture is large, and the colors of the background, scarf, and clothes are common colors. The restoration of skin color and common colors directly reflects the impact of color, brightness and brightness gain difference on the color quality of the image. The background and red scarf have uniform tones. The area is large, so the influence of random clutter can be observed. The strong contrast between the blue background and the yellow clothes makes the outline of the figure particularly clear. The outline of the figure can be used to observe the distortion of echo and brightness delay difference. B2.3 Vase and bouquet
GB/T15639—1995
This is a picture of a vase and bouquet with low average brightness, rich dark levels and brightness details. The background in the picture is clearly layered, and the brightness and darkness of the bouquet and vase are clear. The grayscale level can be observed by the background, and the balance adjustment of brightness and darkness and the image clarity can be observed by the bouquet and vase.
B2.4 Stage characters
This is a panoramic picture of stage characters with low average brightness, rich dark levels and bright details. The background brightness in the picture is low, and the brightness levels of the dark part are rich. It is easy to clearly observe from the background how the dark level and details of the image are affected when random clutter interferes with the image. The soldiers have bright colors that can reflect the distortion of brightness and chromaticity and fine color patterns that can reflect the overlap of bright and one-color signals. The fine patterns are very sensitive to changes in image clarity. In addition, the background brightness in the picture is low, and the recovery ability of the DC component can be observed. B2.5 Street Scenery
This is a street view picture with high average brightness and rich details. The picture contains a variety of common colors, especially sky blue, plant green and light khaki. Their changes can reflect the distortion of color and brightness, as well as the impact of the transition response of the brightness signal on the image quality. The uniform blue sky as the background sets off the clear outline of the trapezoidal building. The ghosting caused by the echo distortion is easily reflected on this bright wheel line. In addition, there are several red and blue road signs in the picture that can reflect the changes in image clarity and the overlap between bright and one-color signals. They have high color saturation.
B2.6 Seaside
It can be used to observe the depth of field of the whole picture and the realism of the water surface, and through the ripples on the water surface, it is possible to clearly observe the comprehensive characteristics such as resolution, focus and color grayscale. The color of the distant forest is difficult to reproduce and should be carefully observed. The olive pole of the yacht is suitable for observing the transition response. The fruits and underwater breathing apparatus in the near distance can be observed to see whether these items can be reproduced realistically. B2.7 Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The color of each fruit is a common color and the color is eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on the color quality of the image. Various fruits have bright and clear color edges and form a strong color contrast. These edges are sensitive to the distortion and saturation adjustment of the echo and bright-color delay difference.
B3 Color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional Notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the TV Drama Production Center of China Central Television. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai.2 Environmental conditions for storage of program source application version: Ambient temperature: 15~35℃;
Relative humidity: 45%~65%
There is no strong electromagnetic field around the environment that affects the tape. A4 Publication of program source application version
The publishing unit of the program source application version must be technically certified by the State Bureau of Technical Supervision. Copying of the program source application version is strictly prohibited. Appendix B
Program source description and evaluation requirements
(reference)
B1 Evaluation items and requirements
See Table B1 for evaluation items and requirements.
Table B1 Evaluation items and requirements
Evaluation items
Test signal
Test chart (full-field monochrome signal)
Dot grid test chart
Evaluation requirements
Any part of the red, green and blue primary color gratings should not be color-biased. Horizontal and vertical white lines should not have obvious color separation. 5
Evaluation items
Overlap between brightness and chromaticity components
Grayscale adjustment
Color satisfaction
Clearance
Grayscale reproduction
Geometric distortion and
Image reproduction rate
Sound interference
Image interference
Total image quality
Total sound quality||tt ||Overall reproduction quality
GB/T15639—1995
Continued Table B1
Test signal
Color test pattern
Step signal, color test pattern
Still and moving images
Black and white test pattern Still and moving images
Step signal Color and black and white test pattern
Test pattern Cross and circle signal
Moving image signal accompanied by music, text or
language
Test pattern Still and moving images
Still and moving images
Test pattern Moving images
Various evaluation program segments
Various program contents
Note: For black and white TVs, evaluation starts from item 6. B2 Subjective evaluation instructions for still images
B2.1 Skin color test chart
Evaluation requirements
The colored parts and their outlines should overlap without separation. The black and white images should not be obviously colored
The colors are bright and pleasing to the eye, and the skin colors are natural and harmonious. The image details are discernible and the outlines are clear. There is no border or tailing on the edges of the image, and the horizontal line structure is clearly outlined
The black and white grayscale levels can be reproduced evenly. The horizontal and vertical parts of each part of the screen maintain approximately unchanged linearity, without deformities on the edges, and the straight lines have no bends, waves or angles. The image amplitude reaches the full screen and has sufficient reproduction rate
The accompanying sound signal-to-noise ratio is high, and there should be no field frequency sound, AC sound, metal sound, click, machine vibration, etc.
The image has a high signal-to-noise ratio, no rolling bars or black bands in the background brightness, no vertical bright bars in the grating, no horizontal interference with the sound, no dot-shaped or mesh-shaped brightness patterns, no irregular jumps and motions in the image, no obvious wave-like motion in the static part of the image, no ghosting, and no fringing
The comprehensive effect of viewing the image is clear and stable, the color is satisfactory and realistic, and there is no color cast and noise interference
The comprehensive effect of listening to the sound is excellent, the bass is full, the treble is clear, there is no noise interference, and the three-dimensional sense is strong
Comprehensive evaluation of the image and sound quality
It is mainly used to observe the restoration of skin color and common colors, and the sharpness of the image can also be observed from the texture of hair and sweater, petals, etc. B2.2 Girl's head portrait
This is a close-up picture of a person with medium to high average brightness and rich brightness levels. The female skin color area in the picture is large, and the colors of the background, scarf, and clothes are common colors. The restoration of skin color and common colors directly reflects the impact of color, brightness and brightness gain difference on the color quality of the image. The background and red scarf have uniform tones. The area is large, so the influence of random clutter can be observed. The strong contrast between the blue background and the yellow clothes makes the outline of the figure particularly clear. The outline of the figure can be used to observe the distortion of echo and brightness delay difference. B2.3 Vase and bouquet
GB/T15639—1995
This is a picture of a vase and bouquet with low average brightness, rich dark levels and brightness details. The background in the picture is clearly layered, and the brightness and darkness of the bouquet and vase are clear. The grayscale level can be observed by the background, and the balance adjustment of brightness and darkness and the clarity of the image can be observed by the bouquet and vase.
B2.4 Stage characters
This is a panoramic picture of stage characters with low average brightness, rich dark levels and bright details. The background brightness in the picture is low, and the brightness levels of the dark part are rich. It is easy to clearly observe from the background how the dark level and details of the image are affected when random clutter interferes with the image. The soldiers have bright colors that can reflect the distortion of brightness and chromaticity and fine color patterns that can reflect the overlap of bright and one-color signals. The fine patterns are very sensitive to changes in image clarity. In addition, the background brightness in the picture is low, and the recovery ability of the DC component can be observed. B2.5 Street Scenery
This is a street view picture with high average brightness and rich details. The picture contains a variety of common colors, especially sky blue, plant green and light khaki. Their changes can reflect the distortion of color and brightness, as well as the impact of the transition response of the brightness signal on the image quality. The uniform blue sky as the background sets off the clear outline of the trapezoidal building. The ghosting caused by the echo distortion is easily reflected on this bright wheel line. In addition, there are several red and blue road signs in the picture that can reflect the changes in image clarity and the overlap between bright and one-color signals. They have high color saturation.
B2.6 Seaside
It can be used to observe the depth of field of the whole picture and the realism of the water surface, and through the ripples on the water surface, it is possible to clearly observe the comprehensive characteristics such as resolution, focus and color grayscale. The color of the distant forest is difficult to reproduce and should be carefully observed. The olive pole of the yacht is suitable for observing the transition response. The fruits and underwater breathing apparatus in the near distance can be observed to see whether these items can be reproduced realistically. B2.7 Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The color of each fruit is a common color and the color is eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on the color quality of the image. Various fruits have bright and clear color edges and form a strong color contrast. These edges are sensitive to the distortion and saturation adjustment of the echo and bright-color delay difference.
B3 Color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional Notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the TV Drama Production Center of China Central Television. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai.1 Skin color test chart
Evaluation requirements
The colored part and its outline should overlap without separation. The black and white image has no obvious coloring
The color is bright and pleasing to the eye, the skin color is natural and harmonious. The image details are discernible and the outline is clear. There is no border or tailing at the edge of the image, and the horizontal line structure is clearly outlined
The black and white grayscale levels can be reproduced evenly at intervals. The horizontal and vertical parts of each part of the screen maintain approximately unchanged linearity, without deformities at the edges, straight lines without bending, wavy or tilted deformation, the image amplitude reaches the full screen, and there is sufficient reproduction rate
The accompanying sound signal-to-noise ratio is high, and there should be no field frequency sound, AC sound, metal sound, click, machine vibration sound, etc.
Image signal-to-noise ratio High, no rolling bars or black bands in the background brightness, no vertical bright bars in the grating, no horizontal interference with the sound, no dot-shaped or mesh-shaped brightness patterns, no irregular jumping and shaking in the image, no obvious wave-like motion in the static part of the image, no ghosting or fringing
Comprehensive effect of viewing the image, clear and stable image, satisfactory and realistic color, no color cast and noise interference
Comprehensive effect of listening to the sound, excellent sound quality, full bass, clear treble, no noise interference, strong stereo sense
Comprehensive evaluation of image and sound quality
Mainly used to observe the restoration of skin color and common colors, and the sharpness of the image can also be observed from the texture of hair and sweater, petals, etc. B2.2 Girl's head
This is a close-up picture of a person with medium to high average brightness and rich brightness levels. The female skin color area in the picture is large, and the colors of the background, scarf, and clothes are common colors. The restoration of skin color and common colors directly reflects the impact of color, brightness and brightness gain difference on the color quality of the image. The background and red scarf have uniform tones. The area is large, so the influence of random clutter can be observed. The strong contrast between the blue background and the yellow clothes makes the outline of the figure particularly clear. The outline of the figure can be used to observe the distortion of echo and brightness delay difference. B2.3 Vase and bouquet
GB/T15639—1995
This is a picture of a vase and bouquet with low average brightness, rich dark levels and brightness details. The background in the picture is clearly layered, and the brightness and darkness of the bouquet and vase are clear. The grayscale level can be observed by the background, and the balance adjustment of brightness and darkness and the image clarity can be observed by the bouquet and vase.
B2.4 Stage characters
This is a panoramic picture of stage characters with low average brightness, rich dark levels and bright details. The background brightness in the picture is low, and the brightness levels of the dark part are rich. It is easy to clearly observe from the background how the dark level and details of the image are affected when random clutter interferes with the image. The soldiers have bright colors that can reflect the distortion of brightness and chromaticity and fine color patterns that can reflect the overlap of bright and one-color signals. The fine patterns are very sensitive to changes in image clarity. In addition, the background brightness in the picture is low, and the recovery ability of the DC component can be observed. B2.5 Street Scenery
This is a street view picture with high average brightness and rich details. The picture contains a variety of common colors, especially sky blue, plant green and light khaki. Their changes can reflect the distortion of color and brightness, as well as the impact of the transition response of the brightness signal on the image quality. The uniform blue sky as the background sets off the clear outline of the trapezoidal building. The ghosting caused by the echo distortion is easily reflected on this bright wheel line. In addition, there are several red and blue road signs in the picture that can reflect the changes in image clarity and the overlap between bright and one-color signals. They have high color saturation.
B2.6 Seaside
It can be used to observe the depth of field of the whole picture and the realism of the water surface, and through the ripples on the water surface, it is possible to clearly observe the comprehensive characteristics such as resolution, focus and color grayscale. The color of the distant forest is difficult to reproduce and should be carefully observed. The olive pole of the yacht is suitable for observing the transition response. The fruits and underwater breathing apparatus in the near distance can be observed to see whether these items can be reproduced realistically. B2.7 Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The color of each fruit is a common color and the color is eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on the color quality of the image. Various fruits have bright and clear color edges and form a strong color contrast. These edges are sensitive to the distortion and saturation adjustment of the echo and bright-color delay difference.
B3 Color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional Notes:
This standard was proposed by the Ministry of Electronics Industry. www.bzxz.net
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the TV Drama Production Center of China Central Television. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai.1 Skin color test chart
Evaluation requirements
The colored part and its outline should overlap without separation. The black and white image has no obvious coloring
The color is bright and pleasing to the eye, the skin color is natural and harmonious. The image details are discernible and the outline is clear. There is no border or tailing at the edge of the image, and the horizontal line structure is clearly outlined
The black and white grayscale levels can be reproduced evenly at intervals. The horizontal and vertical parts of each part of the screen maintain approximately unchanged linearity, without deformities at the edges, straight lines without bending, wavy or tilted deformation, the image amplitude reaches the full screen, and there is sufficient reproduction rate
The accompanying sound signal-to-noise ratio is high, and there should be no field frequency sound, AC sound, metal sound, click, machine vibration sound, etc.
Image signal-to-noise ratio High, no rolling bars or black bands in the background brightness, no vertical bright bars in the grating, no horizontal interference with the sound, no dot-shaped or mesh-shaped brightness patterns, no irregular jumping and shaking in the image, no obvious wave-like motion in the static part of the image, no ghosting or fringing
Comprehensive effect of viewing the image, clear and stable image, satisfactory and realistic color, no color cast and noise interference
Comprehensive effect of listening to the sound, excellent sound quality, full bass, clear treble, no noise interference, strong stereo sense
Comprehensive evaluation of image and sound quality
Mainly used to observe the restoration of skin color and common colors, and the sharpness of the image can also be observed from the texture of hair and sweater, petals, etc. B2.2 Girl's head
This is a close-up picture of a person with medium to high average brightness and rich brightness levels. The female skin color area in the picture is large, and the colors of the background, scarf, and clothes are common colors. The restoration of skin color and common colors directly reflects the impact of color, brightness and brightness gain difference on the color quality of the image. The background and red scarf have uniform tones. The area is large, so the influence of random clutter can be observed. The strong contrast between the blue background and the yellow clothes makes the outline of the figure particularly clear. The outline of the figure can be used to observe the distortion of echo and brightness delay difference. B2.3 Vase and bouquet
GB/T15639—1995
This is a picture of a vase and bouquet with low average brightness, rich dark levels and brightness details. The background in the picture is clearly layered, and the brightness and darkness of the bouquet and vase are clear. The grayscale level can be observed by the background, and the balance adjustment of brightness and darkness and the image clarity can be observed by the bouquet and vase.
B2.4 Stage characters
This is a panoramic picture of stage characters with low average brightness, rich dark levels and bright details. The background brightness in the picture is low, and the brightness levels of the dark part are rich. It is easy to clearly observe from the background how the dark level and details of the image are affected when random clutter interferes with the image. The soldiers have bright colors that can reflect the distortion of brightness and chromaticity and fine color patterns that can reflect the overlap of bright and one-color signals. The fine patterns are very sensitive to changes in image clarity. In addition, the background brightness in the picture is low, and the recovery ability of the DC component can be observed. B2.5 Street Scenery
This is a street view picture with high average brightness and rich details. The picture contains a variety of common colors, especially sky blue, plant green and light khaki. Their changes can reflect the distortion of color and brightness, as well as the impact of the transition response of the brightness signal on the image quality. The uniform blue sky as the background sets off the clear outline of the trapezoidal building. The ghosting caused by the echo distortion is easily reflected on this bright wheel line. In addition, there are several red and blue road signs in the picture that can reflect the changes in image clarity and the overlap between bright and one-color signals. They have high color saturation.
B2.6 Seaside
It can be used to observe the depth of field of the whole picture and the realism of the water surface, and through the ripples on the water surface, it is possible to clearly observe the comprehensive characteristics such as resolution, focus and color grayscale. The color of the distant forest is difficult to reproduce and should be carefully observed. The olive pole of the yacht is suitable for observing the transition response. The fruits and underwater breathing apparatus in the near distance can be observed to see whether these items can be reproduced realistically. B2.7 Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The color of each fruit is a common color and the color is eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on the color quality of the image. Various fruits have bright and clear color edges and form a strong color contrast. These edges are sensitive to the distortion and saturation adjustment of the echo and bright-color delay difference.
B3 Color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional Notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the TV Drama Production Center of China Central Television. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai.7Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The colors of each fruit are common and eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on image color quality. Various fruits have bright and clear color edges and form a strong tonal contrast. These edges are sensitive to the distortion of echo and bright-color delay difference and the adjustment of saturation.
B3 color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the CCTV TV Drama Production Center. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai. 77Fruit
This is a close-up picture of fruits with high average brightness, rich tones and details. The colors of each fruit are common and eye-catching. Their changes can reflect the impact of demodulation phase, demodulation amplitude and bright-color signal gain difference on image color quality. Various fruits have bright and clear color edges and form a strong tonal contrast. These edges are sensitive to the distortion of echo and bright-color delay difference and the adjustment of saturation.
B3 color test chart
Color test chart and its application are in accordance with the requirements of GB2097. Additional notes:
This standard was proposed by the Ministry of Electronics Industry.
This standard was drafted by the Television and Electroacoustic Research Institute of the Ministry of Electronics Industry and the National Radio and Television Product Quality Inspection Center. The physical sample of the program source of this standard was produced by the CCTV TV Drama Production Center. The main drafters of this standard are Wang Lianbo, An Yongcheng, Zhang Chaying, Ji Jianmin, and Ren Honglei. The main producers of the program source sample of this standard are Sun Xinyuan and Li Dai. 7
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