Method and device for fast detection of video resolution

Abstract

The invention provides a rapid detection method of video resolutions and an apparatus thereof. The method comprises the following steps: establishing a resolution information packet table and carrying out grouping according to a plurality of resolution information, wherein the resolution information comprises horizontal synchronization signal data and vertical synchronization signal data; determining difference allowed by information according to the information in the resolution information packet table; detecting unknown video resolution according to the information in the resolution information packet table so as to obtain a detection result; matching the obtained detection result with the information in the resolution information packet table so as to obtain the unknown video resolution. The apparatus comprises: a memory cell, an analysis unit, a detection unit and a matching unit. By using the method and the apparatus provided in the invention, a requirement to a detection equipment clock frequency can be reduced, counting values of the horizontal and vertical synchronization signals can be simultaneously reduced and system resources can be saved.

Description

technical field [0001] The invention relates to the field of video processing, in particular to a method and device for quickly detecting video resolution. Background technique [0002] With the popularity of video technology, various video receiving, switching and processing equipment are also developing rapidly. In various video processing fields, the detection of video resolution is essential. According to the Video Electronics Standards Association (VESA, Video Electronics Standards Association) standard, the video graphics array is mainly composed of horizontal synchronization signal, vertical synchronization signal, tri-primary red signal line, tri-primary blue signal line and tri-primary green signal line. The resolution of the video signal is determined by the horizontal synchronization signal and the vertical synchronization signal. The method for detecting video resolution in the prior art is to use a high-speed processing device to sample and count the horizonta...

AI Technical Summary

Problems solved by technology

Using this method to detect unknown resolution requires the device clock to be much higher than the clocks of the horizontal synchronization signal and vertical synchronization signal of the detected resolution, so the detection device needs to have a higher sampling clock, and at the same time use an overly high clock reference to Counting the horizontal synchronization signal and the vertical synchronization signal also requires a huge counter and consumes too many resources, so it cannot be completed by a general system. In the face of more and more cheap systems that need to realize the detection of unknown video resolutions, There is a need for a fast way to detect unknown video resolutions

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