Movie-mode video signal processing method and device

Abstract

The invention discloses a movie-mode video signal processing method and a movie-mode video signal processing device. The movie-mode video signal processing method comprises the following steps of: judging whether scene change exists or not; according to one or combinations of heteropolar scene differences and homopolar four-scene differences in set numbers before and after the scene change, judging whether miscoding exists or not before and after a scene and judging signal types before and after the scene change; and according to judgment results, performing corresponding processing on subsequent signals. In the method and the device, by fully utilizing structural characteristics of movie-mode video signals and television video signals and pixel changes among frames and the scenes obtained by the splitting of frame data, the miscoding is effectively detected according to one of the heteropolar scene differences and homopolar four-scene differences, error detection caused by the change of video signal types is effectively eliminated, and the play quality of the movie-mode video signals is greatly improved.

Description

technical field [0001] The invention relates to the field of video image processing, in particular to a film mode video signal processing method and device. Background technique [0002] With the expansion of TV screen size and the development of high-definition technology, more and more people choose to watch movies on TV screen. At present, when producing movie materials, cameras usually shoot at a frame rate of 24 frames per second to obtain progressive-scan movie-mode video signals. In order to control the bandwidth, the current TV system mostly uses interlaced scanning to process the video signal to be played. The interlaced scanning TV signal system adopted by most countries mainly includes 60 field / second color TV system named after the National Television System Committee (NTSC) and 50 field / second progressive phase inversion ( Phase Alternation Line, PAL) color TV system TV signal. Therefore, there is a difference between the rate of the movie mode video signal a...

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Problems solved by technology

[0007] However, the above method only records the field that has a large change from the adjacent field, and in the normal movie mode video signal playback process, when the scene changes or jumps out of the movie mode and enters the TV mode, even if there is no wrong editing, the front field and the corresponding field will be different. The field difference changes in adjacent fields will also be more obvious, but when the above method is used for discrimination, the above situation cannot be identified, and it is very easy to cause misjudgment

In addition, in the above method, the specific threshold is obtained by artificial setting or modified according to the judgment result, so that the specific threshold cannot follow the signal changes in real time, and the detection result is prone to delay

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