A Video Synchronization Method Based on Image Multidimensional Feature Value Comparison

Abstract

The invention relates to a video synchronization method based on multidimensional image feature value comparison. The video synchronization method is used for enabling a source video and a target video of the same video / audio program from different sources in a play system to be synchronous by using a multidimensional image feature value comparison algorithm. The method comprises the following steps of: extracting a plurality of image feature values from the source video and the target video based on a component Y, and summarizing the image feature values into a multidimensional feature vector; setting the size of a sliding window, and calculating the errors of the image feature values in the front-rear-frame time-domain direction of the size of the sliding window; accounting and recording the location of the sliding window when the least error occurs; and calculating the advancing or lagging frame number of the target video relative to the source video, and determining a synchronization point. According to the video synchronization method based on the multidimensional image feature value comparison, the synchronization error can be controlled within one frame, so that the same video synchronization effect can also be achieved in environments where the PTS (Presentation Time Stamp) synchronization can not be utilized.

Description

technical field [0001] The invention relates to the field of radio and television signal monitoring, in particular to a video synchronization method based on image multi-dimensional feature value comparison. Background technique [0002] With the continuous emergence and rise of new media such as digital TV, IPTV, and mobile TV, it is the general trend for digital TV signals to replace analog TV signals. In the era of analog TV, the loss of TV signals during transmission is the main cause of video quality degradation, so the measurement of signal-to-noise ratio can be used to determine the broadcast quality. In the era of digital TV, signal transmission is no longer the main cause of quality degradation. Digital TV signal sources such as satellite TV, terrestrial digital, IPTV, and mobile TV generally have layer-by-layer compression and transcoding. During the transcoding process, the encoding format Changes in , resolution, bit rate, reference frame position, etc. will bri...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problem that when a video program is transcoded, the display time stamp PTS contained in it will change, and the multi-channel video synchronization cannot be performed through the display time stamp PTS, and to provide an image-based multi-dimensional feature value Compare Video Synchronization Method

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