Video detecting and processing method and video detecting and processing device

Abstract

The invention relates to a video detecting and processing method. The video detecting and processing method comprises the following steps: calculating the whole dependency of images of adjacent fields to predicate whether a current field is a film field or not; if so, combining the current field and the adjacent field to form a frame; detecting comb tooth artifacts in the synthesized frame pixel by pixel; if no comb tooth artifact is detected, determining that a current local region is a film pattern and taking the synthesized frame as a restored video frame; if the comb tooth artifacts are detected, judging that the current local region is a non-film pattern; and calculating an interpolation frame by adopting a movement self-adaptive method or a spatial interpolation method and taking the interpolation frame as a restored video frame. The video detecting and processing method can be used for correctly detecting a film region and an interlacing region in a mixed video and different interlacing removing technologies are used for processing respectively, so that the details of the film region are recovered and a comb tooth phenomenon is avoided. Meanwhile, a film pattern detection module and an interlacing removing module can use the same input so that field caching and DDR bandwidth are reduced, and the hardware cost is saved.

Description

technical field [0001] The invention relates to the field of video mode detection, in particular to a video detection and processing method and device. Background technique [0002] Movies are usually shot at 24 frames per second on a progressive basis. In order to play movie programs smoothly on TV, it is necessary to split movie frames into TV field signals for broadcast transmission. This technology is called pull-down conversion process, and the common ones include 3:2 pull-down conversion and 2:2 pull-down conversion technology in PAL broadcasting. Take the 3:2 pull-down conversion as an example, if the movie frame sequence is represented by A, B, C, D..., such as figure 1 As shown, first split each frame into two fields, such as A t and A b , where the subscripts t and b represent the top field and the bottom field respectively, and the TV field signal obtained after 3:2 pull-down conversion processing is A t 、A b 、A t , B b , B t 、C t 、C b 、C t 、D t 、D b...

AI Technical Summary

Problems solved by technology

The existing technology only gives the detection results of the whole field, which makes the de-interlacing module mistakenly treat the interlaced areas in these mixed videos as film mode, so that combing artifacts (such as Figure 11 )

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