WO2017133359A1 - Procédé et système de mesure de paramètre de performances de dispositif d'affichage - Google Patents

Procédé et système de mesure de paramètre de performances de dispositif d'affichage Download PDF

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Publication number
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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WO
WIPO (PCT)
Prior art keywords
video sequence
sequence
signal strength
display device
aligned
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PCT/CN2016/112880
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English (en)
Chinese (zh)
Inventor
雷延强
罗忠辉
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广州视源电子科技股份有限公司
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Publication of WO2017133359A1 publication Critical patent/WO2017133359A1/fr

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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
    • 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
    • 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

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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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)
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Abstract

L'invention concerne un procédé et un système destinés à mesurer un paramètre de performances d'un dispositif d'affichage. Le procédé comporte les étapes consistant à: acquérir une première séquence vidéo actuellement délivrée parmi des séquences vidéo présentant une valeur prédéfinie d'intensité de signal et délivrées par un dispositif d'affichage; effectuer, selon une séquence de test pré-stockée, une opération d'alignement sur la première séquence vidéo; régler une intensité de signal de la première séquence vidéo alignée à une première intensité de signal, la première intensité de signal étant une intensité critique de signal à laquelle un effet de mosaïque se produit après que la première séquence vidéo alignée est délivrée par le dispositif d'affichage; et déterminer, d'après la première intensité de signal, un paramètre de performances du dispositif d'affichage. Le procédé et le système de mesure d'un paramètre de performances d'un dispositif d'affichage peuvent réaliser une mesure automatique du paramètre de performances sans nécessiter un réglage manuel et des dispositifs matériels supplémentaires, et présentent des coûts faibles et un rendement élevé.
PCT/CN2016/112880 2016-02-02 2016-12-29 Procédé et système de mesure de paramètre de performances de dispositif d'affichage WO2017133359A1 (fr)

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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
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
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

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