Video signal real-time output processing system

Abstract

The invention discloses a video signal real-time output processing system, which comprises a video decoding module, a graph zooming module, a testing graph generating module, a video post-processing module and an output processing module, wherein the video decoding module decodes original video data; the graph zooming module judges whether a current system has a stable video signal, if so, the graph zooming module generates a reconstruction timing sequence signal and performs zooming processing on the decoded video data; the testing graph generating module generates a testing graph; the video post-processing module performs optimization processing on an image; and the output processing module outputs the video image when a stable signal exists, otherwise outputs the testing graph. The video signal real-time output processing system can output the stable testing graph when a video signal does not exist or the video signal is not stable, achieves the functions of being capable of outputting the testing graph timely and ensuring stable output of the image in states from nonexistence to existence of a signal or from existence to nonexistence of the signal in a real-time system on chip without a frame storage, can further output the snowflake point testing graph, and has high application value.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a real-time output processing system for video signals. Background technique [0002] CVBS (Composite Video Broadcast Signal, Composite Video Broadcast Signal) signal is the most important analog video input signal. CVBS is widely used in video doorbells, car rearview mirrors, car players, and other fields such as mobile phones for the elderly, small-size analog TVs, and even the display control of the current hot model aircraft. [0003] In the above CVBS application fields, it is usually equipped with a low-cost CVBS real-time decoding chip to realize the output and display function of CVBS signal decoding. In this system, usually when the input CVBS signal is unstable or there is no input signal, a blue screen, color bars and other test patterns similar to screensavers are displayed. [0004] In the prior art, when displaying a normal CVBS input image or test patter...

AI Technical Summary

Problems solved by technology

However, in the existing technology, in general, when there is no signal, only fixed data test patterns can be generated, such as blue screen, black screen or color bars, etc., and random snowflake dot patterns cannot be generated, which is difficult to meet the increasingly diverse needs of customers

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