Video output quality detection method and device

Abstract

The invention discloses a video output quality detection method which comprises the following steps: providing a signal source, wherein the signal source contains S numbered identical continuous frame signals, and the total frame number S is a positive integer greater than 1; a video output device to be detected receives the input of the signal source and outputs a video; detecting the intra-frame quality of each frame in the S numbered frames of the output video according to the average value (Paverage) of the weighted average peak signal-to-noise ratio of the S numbered frames of the output video; detecting the interframe quality of the adjacent frames in the S numbered frames of the output video; if both the intra-frame quality and the interframe quality are qualified, judging that the video output quality of the video output device to be detected is qualified; and else, judging that the video output quality is not qualified. The invention also discloses a video output quality detection device. The method and the device can enhance the detection precision of the output quality of the video.

Description

technical field [0001] The invention relates to the field of video detection, in particular to a method and device for detecting video output quality. Background technique [0002] With the development of technology, video output devices, such as set-top boxes, have been widely used. In the actual production process, before the video output device leaves the factory, the video output quality of the video output device needs to be tested to verify whether the produced video output device is qualified. Common fault types of video output devices are generally the following: no video signal output, output video signal interruption, or low image quality. Among them, low image quality usually manifests as image blur, image distortion, or image mosaic. [0003] The prior art provides three detection methods for video output quality, and the three methods are briefly introduced below. [0004] Existing technology 1: Provide a signal source, input the video signal output by the vid...

AI Technical Summary

Problems solved by technology

However, this method relies on the comparison of macroblock data, and the macroblock data is sampled and quantized data. Due to the difference in sampling precision or quantization precision between the reference frame and the current frame, the data of the macroblock may also be different, which will affect the search. In addition, searching for frames with the same data as all macroblocks in the current frame in the saved reference frame requires a large amount of calculation and is not practical

[0007] It can be seen that the detection accuracy of the three video output quality detection methods provided by the prior art is relatively low

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