Sound and image synchronization test method and device

Abstract

The invention discloses a sound and image synchronization test method. The sound and image synchronization test method includes: adding frame numbers in all frames of video in sequence; when reading audio data of the video through an audio decoder, determining playing moments that audio signals arise from nothing as check points, and obtaining the number of a first frame corresponding to each check point from the video after the frame numbers are added; when a terminal plays the video after the frame numbers are added, obtaining the number of a second frame corresponding to the current video frame when detecting that the audio signals arise from nothing for the Nth time, and judging whether the current sound and the current image are synchronous according to the number of the first frame corresponding to the Nth check point obtained by arranging the check points in an ascending sort order of the playing moments, the number of the second frame obtained at present and a preset first threshold, wherein values of N are sequentially 1,2, 3 .... The invention further discloses a sound and image synchronization test device. The sound and image synchronization test method and the sound and image synchronization test device achieve objective, accurate and concise sound and image synchronization tests for the video actually watched by users.

Description

technical field [0001] The invention relates to the technical field of audio and video testing, in particular to an audio and video synchronization testing method and device. Background technique [0002] Since multimedia devices such as televisions spend more time processing video signals than audio signals, especially when video images need to perform quality motion compensation, more time will be spent. During the research and development process, it is necessary to test whether the audio and video of the video are synchronized, that is, store the audio signal in the cache, and test and measure the difference in playback of the audio and video. [0003] The current common way to test the synchronization of audio and video is for the testers to watch TV and compare whether the lip movement of the characters in the video screen is synchronized with the sound they hear. Due to the individual differences of the testers, there will be an error of about 200ms, but many enthusi...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method and device for synchronous testing of audio and video, aiming to solve the technical problem that the existing synchronous testing methods of audio and video are not objective, accurate and simple

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