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Delay test method for video image processing system

A processing system, delay detection technology, applied in the direction of image communication, television, electrical components, etc., can solve the problem of not finding the system delay and so on

Inactive Publication Date: 2011-08-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a method that can accurately test system delay has not been found in the prior art

Method used

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  • Delay test method for video image processing system
  • Delay test method for video image processing system
  • Delay test method for video image processing system

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Embodiment Construction

[0015] The preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0016] Taking the PAL system video processing system as an example, the present invention will be further described.

[0017] Such as figure 2 , to test the video generator, with FPGA 2 as the core device, equipped with flash 6, SRAM 7 and video DA 8. The specific model currently in use is XC5VLX50T-FF11362. The flash 6 model K9F4G08UOA has a capacity of 4Gbit, the minimum read and write cycle can reach 25ns, and the data width is 8bit. PAL system DA8 chooses SAA7121H, which can convert CCIR656 digital video to PAL analog video. Its parameters can be configured through the I2C bus. The model of synchronous SRAM 7 is IDT71V65803 and the alternative model is GS880z183236b. The read and write speed of this type of SRAM can reach 150MHz, and the data width is 16bit.

[0018] Before the test, the host computer (PC) 1 edits the test im...

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Abstract

The invention relates to a delay test method for a video image processing system, which comprises the following steps: 1) editing a to-be-tested image by the using of a PC (personal computer), sending the to-be-tested image to a tested video generator, storing the to-be-tested image in a flash by the tested video generator, and standing by; 2) at the moment of testing, selecting the to-be-tested image by an upper computer according to a video standard of tested system and testing the specific sequence form and video format; 3) sending a to-be-tested video into the tested system; and 4) sending the to-be-tested video generated from the step 2) and the video outputted by the tested system to an oscilloscope or logic analysis meter, and reading the time difference of input and output, namely acquiring the system delayed volume. The tested images in the tested video are continuously outputted at intervals. The invention provides a simple, direct and practical method, which can be used for accurately testing the delay of the video image processing system.

Description

technical field [0001] The invention relates to a time-delay detection method, in particular to a time-delay method for a video image processing system, and belongs to the field of video image processing. Background technique [0002] The detection technology of various sensors (such as visible light, long-wave infrared, medium-wave infrared, near infrared, etc.) has been developed rapidly, so video image processing systems for various sensor applications have emerged as the times require. The video image processing system will always delay the video signal stream when performing video processing, and the system delay is an extremely important parameter in some application environments with strict real-time requirements. If it is applied to a vehicle driving observation system, when an obstacle is found in front, if the system delay is large, the driver's reaction speed of avoidance will be seriously reduced, and it is very likely to cause bad consequences when driving at hi...

Claims

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Application Information

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IPC IPC(8): H04N17/00
Inventor 金伟其范永杰骆媛李家坤
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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