Method and system for detecting video/audio signal circuit board
A signal circuit and audio signal technology, which is applied in the field of detection of video and audio signal circuit boards, can solve the problems of low test efficiency, easy missed test, and low accuracy, so as to improve data transmission speed, improve efficiency, and reduce misjudgment and missed The effect of the test
Active Publication Date: 2011-06-08
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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Problems solved by technology
[0002] In the mass production of traditional LCD TV panels and plasma display signal processing boards, audio and video performance testing adopts the subjective evaluation method of manual listening and watching, which has problems such as low testing efficiency, easy missed testing, and low accuracy.
At present, there is no special test system that can automatically test various circuit boards with video and audio signals, such as LCD display signal processing boards, LCD TV signal processing boards, plasma TV signal processing boards, projector signal processing boards, DVD decoder boards, multimedia playback boards, etc. Circuit boards including audio and video interfaces, such as circuit boards, for fast and accurate detection
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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0024] Such as figure 1 As shown, Embodiment 1 of the present invention provides a method for detecting an audio-visual signal circuit board, comprising steps:
[0025] 101. Put the tested video and audio signal circuit board into the test frame of the test system, turn on the power supply to test the voltage, and input a variety of signals corresponding to the TV mode or game mode;
[0026] 102. Collect the LVDS format image signal, audio signal, voltage, and current output by the video and audio signal circuit board, compare them with the standard parameters stored in the test system, and convert the LVDS format image signal into a PCI-E format signal And compare according to the three primary color pixels to determine whether it is within the preset normal thr...
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The invention discloses a method and system for detecting a video/audio signal circuit board. The method comprises the following steps: A, placing at least two video/audio signal circuit boards in a test frame of a test system, opening a power test voltage, and inputting multiple kinds of signals corresponding to a TV mode or game mode; B, acquiring the image signal of LVDS format (low voltage differential signaling), audio signal, voltage and current output by the video/audio signal circuit board, comparing with the parameters stored in the test system, and comparing the image signal of LVDS format according to pixels of three primary colors to judge whether the image signal is in a preset normal threshold range; and comparing the audio signal according to the frequency characteristic to judge whether the frequency and signal-to-noise ratio are in the preset normal threshold range; and C, testing the key function and software version of the video/audio signal circuit board, and finally displaying a corresponding test report. According to the invention, a plurality of circuit boards with video/audio signal function can be quickly and accurately detected, and the product detection efficiency is improved.
Description
technical field [0001] The invention relates to the field of electronic testing, in particular to a method and system for testing video and audio signal circuit boards. Background technique [0002] In the mass production of traditional LCD TV panels and plasma display signal processing boards, audio and video performance testing adopts the subjective evaluation method of manual listening and watching, which has problems such as low test efficiency, easy to miss, and low accuracy. At present, there is no special test system that can automatically test a variety of circuit boards with video and audio signals, such as LCD display signal processing boards, LCD TV signal processing boards, plasma TV signal processing boards, projector signal processing boards, DVD decoder boards, multimedia playback boards, etc. Circuit boards including audio and video interfaces, such as circuit boards, for fast and accurate detection. Contents of the invention [0003] The purpose of the pr...
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IPC IPC(8): G01R31/28
Inventor 任锐余杰
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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