Detection and processing method for 2-2 film mode
A film mode and processing method technology, applied to color TV parts, TV system parts, TVs, etc., can solve problems affecting picture quality, achieve the effect of preventing subtitle feathering, simple and fast detection and processing
Inactive Publication Date: 2012-07-11
SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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No matter what kind of processing result, it will affect the quality of the picture
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[0041] The present invention will be further described below in conjunction with the example in the drawing.
[0042] The film mode detection of the present invention only detects the luma channel, and the other two chrominance channels will be processed according to the luma channel.
[0043] 2-2 A method for detecting a movie signal, comprising the following steps:
[0044]A. Calculate the four-field difference of the same polarity field of the interlaced scanning signal of the n-3, n-2, n-1 field and the nth field and the heteropolarity of the interlaced scanning signal of the n-1 field and the nth field field difference, and obtain the detection sequence of 2-2 conversion by calculation according to the obtained value;
[0045] B. Judging whether the obtained detection sequence conforms to the corresponding standard detection sequence, if so, it is a movie signal corresponding to the standard detection sequence, otherwise it is a TV signal.
[0046] The principle of dete...
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The invention discloses a detection and processing method for a 2-2 film mode. The method comprises the following steps of: dividing screen areas, wherein the divided screen areas comprise areas possibly with caption and a non-caption area; performing 2-2 pull-down film mode detection on the non-caption area; if the non-caption area is not in a 2-2 pull-down mode, performing entire-screen picture de-interlacing processing; and if the non-caption area is in the 2-2 pull-down mode, searching for possibly moving caption in the areas possibly with the caption, judging whether scroll caption exists or not, performing picture de-interlacing processing on a caption area and performing film mode processing on the other areas if the scroll caption exists, and if the scroll caption does not exist, performing the film mode processing. The method has the advantages that: the film mode with the scroll caption can be simply and conveniently detected and processed, and the shortcoming that the quality of a picture is degraded by the processing of a picture de-interlacing technology due to a caption feather phenomenon or film mode quitting caused by scroll caption detection incapability is overcome.
Description
technical field [0001] The invention relates to a detection and processing method and device for a 2-2 movie mode, in particular to a detection and processing method for a 2-2 pull-down movie mode with rolling subtitles. Background technique [0002] At present, with the popularization of progressive scan TV, it is necessary to deinterlace the video stream. However, in practical applications, it is usually the ordinary interlaced scan video stream that needs to be deinterlaced. The ordinary TV video stream is interlaced. time points are different. Movie videos are usually shot at 24 frames per second, and the two fields of each frame are shot at the same time point. If traditional de-interlacing technology is used to process movie videos, the effect will not be the best. In order to play movies smoothly on the TV, you can use the 2-2 pull-down method to convert the movie to PAL video, and change 24 frames to 48 fields, or you can use the 3-2 pull-down method to convert the ...
Claims
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Login to View More IPC IPC(8): H04N5/253H04N7/01
Inventor 袁野刘宇轩刘志恒江显舟王峰戴杨孙军
Owner SHANGHAI HIGH DEFINITION DIGITAL TECH IND