WO2017133359A1 - 显示设备的性能参数检测方法和系统 - Google Patents
显示设备的性能参数检测方法和系统 Download PDFInfo
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- WO2017133359A1 WO2017133359A1 PCT/CN2016/112880 CN2016112880W WO2017133359A1 WO 2017133359 A1 WO2017133359 A1 WO 2017133359A1 CN 2016112880 W CN2016112880 W CN 2016112880W WO 2017133359 A1 WO2017133359 A1 WO 2017133359A1
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
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- 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
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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
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Definitions
- the present invention relates to the field of signal detection technologies, and in particular, to a method and system for detecting performance parameters of a display device.
- a display device is a device that can output images or touch information. If the input signal is an electronic signal, such a display device will be referred to as an electronic display device, as opposed to a mechanical display device. Common display devices include televisions, computers, and the like. In order to ensure the normal operation of the display device, it is usually necessary to detect some performance parameters of the display device. Taking the TV as an example, the sensitivity of the TV motherboard is an important performance parameter of the TV.
- the existing scheme for detecting the sensitivity of the TV motherboard is: sending a video signal through a dedicated device, outputting it to the TV main board, and then displaying it on the TV screen; the tester manually adjusts the emphasis of the output signal of the dedicated device, and observes whether the screen is on the screen.
- a mosaic effect appears.
- the corresponding signal strength is the sensitivity of the TV motherboard.
- Another solution is to obtain the bit error rate directly through the decoding chip (the representation of the bit error rate is the mosaic effect).
- the prior art has high cost for detecting performance parameters of the display device.
- a method for detecting performance parameters of a display device includes the following steps:
- a performance parameter detecting system for a display device comprising:
- An acquiring module configured to obtain a first video sequence of the current output from a video sequence whose signal strength outputted by the display device is a preset value
- An aligning module configured to perform an alignment operation on the first video sequence according to a pre-stored test sequence; wherein content of the first video sequence is part of the test sequence;
- An adjustment module configured to adjust a signal strength of the aligned first video sequence to a first signal strength; wherein the first signal strength is that the aligned first video sequence is outputted by the display device without a mosaic The critical signal strength between the effect and the appearance of the mosaic effect;
- a determining module configured to determine a performance parameter of the display device according to the first signal strength.
- the method and system for detecting a performance parameter of the display device by acquiring a first video sequence currently outputted from a video sequence whose signal strength is a preset value outputted from the display device, performing alignment operation on the first video sequence, and then aligning
- the signal strength of the first video sequence is adjusted to a critical signal strength between the mosaicless effect and the mosaic effect after output by the display device, and the performance parameter of the display device is determined according to the critical signal strength, and the Automatic detection of performance parameters, no manual adjustment, no additional hardware equipment, low cost and high efficiency.
- FIG. 1 is a flow chart of a method for detecting performance parameters of a display device of the present invention
- FIG. 2 is a schematic structural view of a performance parameter detecting system of a display device of the present invention.
- the performance parameter detecting method of the display device may include the following steps:
- the video sequence may be a higher quality video sequence, wherein the higher quality may mean that the signal strength is a signal strength corresponding to a mosaicless effect after being decoded and output by the display device.
- Control device The video signal generating device is adjusted to output a higher quality video signal to the display device, and the display device can decode the video signal to obtain the video sequence.
- the signal strength exceeds a certain range and the video quality is high.
- the first video sequence may be part of the test sequence, but the signal strength of the first video sequence may be different from the signal strength of the test sequence.
- the video signal generating device continuously outputs the video signal, but it does not indicate which frame in the entire test sequence the image at that moment is.
- the location of the video sequence to prepare for subsequent operations.
- a distance metric function between the first video sequence and the test sequence may be calculated, and the first video sequence may be aligned according to the distance metric function.
- the distance metric function is used to characterize the similarity between the first video sequence and the test sequence.
- the distance metric function may be a function of any metric distance, as long as the metric value is smaller and more similar.
- the distance metric function can be calculated according to the following formula:
- X is the first video sequence
- Y j is a sequence of the test sequence that is the same length as the first video sequence
- d(X, Y j ) is the first video sequence and the test sequence
- n is the number of frames of the first video sequence
- x k is the kth video frame in the first video sequence
- y j+k is the j+k in the test sequence
- Video frames k is an integer between 0 and n
- j is a constant between 0 and mk
- m is the frame length of the test sequence.
- the alignment can be done according to the following formula:
- X is the first video sequence
- Y j is a sequence of the test sequence that is the same length as the first video sequence
- d(X, Y j ) is the first video sequence and the test sequence
- J is the time alignment point of the first video sequence and the test sequence
- j is a constant between 0 and mk
- m is the frame length of the test sequence.
- a frame-by-frame comparison can be taken to determine if there is a mosaic effect at the current time. If the mosaic effect does not appear, continue to adjust the signal strength of the first video sequence to determine again whether the mosaic effect occurs; this cycle until the mosaic effect occurs.
- the critical signal strength of the aligned first video sequence from a no-mosaic effect to a mosaic effect may be set as the first signal strength.
- Step 1 dividing the video frame of the aligned first video sequence into a plurality of non-overlapping regions
- Step 2 calculating a quality evaluation function of each region, and calculating a strength of a mosaic effect of the aligned first video sequence according to a quality evaluation function of each region; wherein the quality evaluation function is used to characterize the aligned Image quality of the first video sequence;
- the quality evaluation function may be any function for evaluating image quality, such as a commonly used PSNR (Peak Signal to Noise Ratio), SSIM (structural similarity), etc., as long as the metric is satisfied. The larger the value, the more similar it is. In this way, the image quality of the aligned first video sequence can be obtained simply and flexibly.
- PSNR Peak Signal to Noise Ratio
- SSIM structural similarity
- I is the intensity of the mosaic effect of the aligned first video sequence
- a value of 1 indicates a mosaic effect. 0 means no mosaic effect
- I is the a-th region of the kth video frame in the aligned first video sequence
- thr 1 is a preset first threshold.
- Step 3 Determine whether a mosaic effect occurs in the aligned first video sequence according to the intensity of the mosaic effect.
- the first signal strength can be used as a basis for detecting performance parameters of the display device. For example, it can be used as an evaluation index for the sensitivity of a TV motherboard.
- the performance parameter detecting system of the display device may include:
- the obtaining module 10 is configured to obtain a first video sequence that is currently outputted from a video sequence whose signal strength outputted by the display device is a preset value;
- the video sequence may be a higher quality video sequence, wherein the higher quality may mean that the signal strength is a signal strength corresponding to a mosaicless effect after being decoded and output by the display device.
- the video signal generating device can be adjusted by the control device to output a higher quality video signal to the display device, and the display device can decode the video signal to obtain the video sequence.
- the signal strength exceeds a certain range and the video quality is high.
- the aligning module 20 is configured to perform an alignment operation on the first video sequence according to a pre-stored test sequence; wherein, the content of the first video sequence is part of the test sequence;
- the first video sequence may be part of the test sequence, but the signal strength of the first video sequence may be different from the signal strength of the test sequence.
- the video signal generating device continuously outputs the video signal, but it does not indicate which frame in the entire test sequence the image at that moment is.
- the location of the video sequence to prepare for subsequent operations.
- a distance metric function between the first video sequence and the test sequence may be calculated, and the first video sequence may be aligned according to the distance metric function.
- the distance metric function is used to characterize the similarity between the first video sequence and the test sequence.
- the distance metric function may be a function of any metric distance, as long as the metric value is smaller and more similar.
- the distance metric function can be calculated according to equation (1). Then, the video sequence alignment operation can be performed according to the formula (2).
- the adjustment module 30 is configured to adjust the signal strength of the aligned first video sequence to a first signal strength; wherein the first signal strength is after the aligned first video sequence is output by the display device The critical signal strength between the mosaic effect and the mosaic effect;
- a frame-by-frame comparison can be taken to determine if there is a mosaic effect at the current time. If the mosaic effect does not appear, continue to adjust the signal strength of the first video sequence to determine again whether the mosaic effect occurs; this cycle until the mosaic effect occurs.
- the critical signal strength of the aligned first video sequence from a no-mosaic effect to a mosaic effect may be set as the first signal strength.
- the adjustment module 30 can determine whether the aligned first video sequence has a mosaic effect by:
- the video frame of the aligned first video sequence may be divided into a plurality of non-overlapping regions
- a quality evaluation function of each region may be calculated, and an intensity of a mosaic effect of the aligned first video sequence is calculated according to a quality evaluation function of each region; wherein the quality evaluation function is used to characterize the aligned Image quality of the first video sequence;
- the quality evaluation function may be any function for evaluating image quality, such as a commonly used PSNR (Peak Signal to Noise Ratio), SSIM (structural similarity), etc., as long as the metric is satisfied. The larger the value, the more similar it is. In this way, the image quality of the aligned first video sequence can be obtained simply and flexibly.
- PSNR Peak Signal to Noise Ratio
- SSIM structural similarity
- the intensity of the mosaic effect can be calculated according to formula (3).
- the determining module 40 is configured to determine a performance parameter of the display device according to the first signal strength.
- the first signal strength can be used as a basis for detecting performance parameters of the display device. For example, it can be used as the main TV Evaluation index of board sensitivity.
- the performance parameter detecting system of the display device of the present invention has a one-to-one correspondence with the performance parameter detecting method of the display device of the present invention, and the technical features and beneficial effects described in the embodiments of the performance parameter detecting method of the above display device are all applicable to the display device. In the embodiment of the performance parameter detection system, it is hereby declared.
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Abstract
Description
Claims (10)
- 一种显示设备的性能参数检测方法,其特征在于,包括以下步骤:从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;根据所述第一信号强度确定所述显示设备的性能参数。
- 根据权利要求1所述的显示设备的性能参数检测方法,其特征在于,根据预存的测试序列对所述第一视频序列进行对齐操作的步骤包括:计算所述第一视频序列与所述测试序列之间的距离度量函数;其中,所述距离度量函数表征所述第一视频序列与所述测试序列中对应长度的序列之间的相似度;根据所述距离度量函数对所述第一视频序列进行对齐操作。
- 根据权利要求3所述的显示设备的性能参数检测方法,其特征在于,根据所述距离度量函数对所述第一视频序列进行对齐操作的步骤包括:根据如下公式进行对齐操作:式中,X为所述第一视频序列,Yj为所述测试序列中与第一视频序列等长的序列,d(X,Yj)为所述第一视频序列与所述测试序列之间的距离度量函数,J为所述第一视频序列与所述测试序列的时间对齐点,j是0到m-k之间的常数,m为测试序列的帧长度。
- 根据权利要求1所述的显示设备的性能参数检测方法,其特征在于,将对齐后的第一视频序列的信号强度调整为第一信号强度的步骤包括:判断对齐后的第一视频序列是否出现马赛克效应;若未出现马赛克效应,则调整对齐后的第一视频序列的信号强度,在所述对齐后的第一视频序列出现马赛克效应时止,并将对应的信号强度设为所述第一信号强度。
- 根据权利要求5所述的显示设备的性能参数检测方法,其特征在于,所述第一信号强度为所述对齐后的第一视频序列从无马赛克效应到出现马赛克效应的临界信号强度。
- 根据权利要求5所述的显示设备的性能参数检测方法,其特征在于,判断对齐后的第一视频序列是否出现马赛克效应的步骤包括:将对齐后的第一视频序列的视频帧划分为若干个不重叠的区域;计算各个区域的质量评价函数,并根据各个区域的质量评价函数计算所述对齐后的第一视频序列的马赛克效应的强度;其中,所述质量评价函数表征所述对齐后的第一视频序列的图像质量;根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应。
- 根据权利要求7所述的显示设备的性能参数检测方法,其特征在于,根据所述马赛克效应的强度判断对齐后的第一视频序列是否出现马赛克效应的步骤包括:将所述马赛克效应的强度与预设的第二阈值进行比较;若所述马赛克效应的强度大于所述第二阈值,则判定对齐后的第一视频序列出现马赛克效应;否则,判定对齐后的第一视频序列未出现马赛克效应。
- 一种显示设备的性能参数检测系统,其特征在于,包括:获取模块,用于从显示设备输出的信号强度为预设值的视频序列中获取当前输出的第一视频序列;对齐模块,用于根据预存的测试序列对所述第一视频序列进行对齐操作;其中,所述第一视频序列的内容为所述测试序列的一部分;调整模块,用于将对齐后的第一视频序列的信号强度调整为第一信号强度;其中,所述第一信号强度为所述对齐后的第一视频序列经所述显示设备输出后无马赛克效应与出现马赛克效应之间的临界信号强度;确定模块,用于根据所述第一信号强度确定所述显示设备的性能参数。
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| CN105704485B (zh) * | 2016-02-02 | 2018-05-25 | 广州视源电子科技股份有限公司 | 显示设备的性能参数检测方法和系统 |
| CN106572387B (zh) * | 2016-11-09 | 2019-09-17 | 广州视源电子科技股份有限公司 | 视频序列对齐方法和系统 |
| CN106657996B (zh) * | 2016-11-09 | 2019-03-26 | 广州视源电子科技股份有限公司 | 显示设备的性能参数检测方法和系统 |
| CN106612457B (zh) * | 2016-11-09 | 2019-09-03 | 广州视源电子科技股份有限公司 | 视频序列对齐方法和系统 |
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| GB0706496D0 (en) * | 2007-04-03 | 2007-05-09 | British Telecomm | Method and system for video quality assessment |
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| CN103581663B (zh) * | 2012-08-03 | 2015-07-29 | 展讯通信(上海)有限公司 | 电路板的测试方法及系统 |
| CN104427333A (zh) * | 2013-08-20 | 2015-03-18 | 北京市博汇科技股份有限公司 | 一种高清电视信号检测方法及系统 |
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| CN101511039A (zh) * | 2009-02-25 | 2009-08-19 | 深圳创维数字技术股份有限公司 | 一种数字电视接收终端的灵敏度测试方法及系统 |
| CN102740109A (zh) * | 2011-04-15 | 2012-10-17 | 中国移动通信集团公司 | 一种确定终端接收灵敏度的方法、系统及设备 |
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| US20150256825A1 (en) * | 2014-03-04 | 2015-09-10 | Black Diamond Video | Apparatuses, methods, and systems for troubleshooting multimedia network communication systems |
| CN105704485A (zh) * | 2016-02-02 | 2016-06-22 | 广州视源电子科技股份有限公司 | 显示设备的性能参数检测方法和系统 |
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| CN105704485B (zh) | 2018-05-25 |
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