Digital video encoder function testing method

Abstract

The invention provides a digital video encoder function testing method. A digital video encoder is respectively connected with a decoder and a central processing unit (CPU), wherein, the decoder is connected with the CPU; the decoder comprises a high-speed analog-to-digital (AD) converter (1); and the CPU comprises a liquid crystal display (LCD) controller and a high-speed AD converter (2). The method comprises the following steps: 10. a video signal is transmitted to a television signal encoder by the CPU through the LCD controller, and the video signal is encoded into a digital television signal; 20. the television signal is converted into an analog video signal through a video analog-to-digital converter, and is processed through a filter; 30. the signal processed by the filter is transmitted to the high-speed AD converter (1) through a multi-path switch, and is converted into a digital signal; and 40. the digital signal is received by the CPU through the high-speed AD converter (2), and analysis processing is carried out to obtain the testing result. The method of the invention has simple operation process, can reduce the cost, can improve the efficiency, and has wide use range.

Description

【Technical field】 [0001] The invention relates to a digital video, in particular to a method for functional testing of a digital video encoder. 【Background technique】 [0002] In the digital video encoder in the digital video system, the decoded digital video signal is input and separated into chrominance and luminance signals, and the signals separated by the response clock, vertical synchronization signal, horizontal synchronization signal and field signal are converted into analog composite video baseband signal. Digital video encoder: It includes a TV signal encoder and a video DA converter. The TV signal encoder refers to converting analog LCD data into digital TV signals, and the video DA converter converts digital video signals into Analog video signal. [0003] Usually, it is difficult to test the interface of this kind of digital video encoder. Generally, it is necessary to use a special test instrument to analyze the encoded and decoded signal, which is low in ef...

AI Technical Summary

Problems solved by technology

[0003] Usually, it is difficult to test the interface of this kind of digital video encoder. Generally, it is necessary to use a special test instrument to analyze the encoded and decoded signal, which is low in efficiency and high in cost for the test of batch chips. And the current function, if each interface needs a special test instrument, then a chip needs to be tested many times to judge whether it is good or bad, which is very inefficient and not an effective method

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