Method and device for detecting three-field motion of de-interlacing processing and de-interlacing system

Abstract

The invention discloses a method and a device for detecting three-field motion of de-interlacing processing and a de-interlacing system. The method comprises the following steps of: calculating an inter-field difference, an interframe difference and a brightness profile pattern (BPP) difference of a three-field image respectively; determining a determination difference for determining each pixel point of pixel point motion information according to the obtained inter-field difference, the interframe difference and the BPP difference; and comparing each determination difference with a preset motion detection threshold value, and judging whether each pixel point moves according to a comparison result. According to the technical scheme of the invention, correlative pixels points of a front field and a back field are combined by means of statistics for perform three-field detection, and the interframe difference and the inter-field difference are combined as motion detection, so the defects of the two detection methods are compensated, and very precise detection on the motion of a fast object and an edge of a static image is achieved; and by combining a BPP detection method, the credibility of large-area moving image detection is increased, and the reliability of motion detection in the de-interlacing processing is improved and enhanced.

Description

technical field [0001] The invention relates to a three-field motion detection method for de-interlacing processing, a three-field motion detection device for de-interlacing processing and a de-interlacing system. Background technique [0002] In traditional television systems, interlacing is widely used to reduce bandwidth. In recent years, the rapid development of digital TV has attracted the attention of the world. These displays all require progressive scanning, so the deinterlacing circuit, as an important part of the interface circuit of these displays, has been paid more and more attention by people. To achieve better deinterlacing effect, especially in the application of large-screen display walls, if the deinterlacing effect is not good, the enlarged image will be difficult for users to accept. At present, it is generally recognized in the industry that the better de-interlacing algorithm is motion compensation or adaptive algorithm. Whether it is a motion-adaptiv...

AI Technical Summary

Problems solved by technology

This will cause false motion detection, mistakenly think that the area is a motion area, and as a result, the in-field line interpolation algorithm will be used to make the subtitle blurred

This method is very simple, but it will lose some details in the final display image, and it is easy to misjudgment in places with rich details

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