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Method, device and display for detecting television movie mode

A technology of telecine and mode, applied in the field of image processing, can solve the problems of lack of detailed analysis, unsatisfactory detection accuracy, rough calculation results, etc., and achieve the effect of high accuracy.

Inactive Publication Date: 2009-06-17
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technical solutions are simple to deal with the absolute difference. For example, only the absolute difference of pixels in adjacent fields is calculated. Since the polarities of adjacent fields are different, there are no pixels with the same coordinates, so the calculation results are relatively rough.
[0011] 2. There is no detailed analysis of the characteristics of 3:2 conversion (pulldown) and 2:2 conversion, and different processing
The existing technology often uses the same method for detection, but does not adopt the corresponding detection method according to its characteristics, resulting in unsatisfactory detection accuracy

Method used

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  • Method, device and display for detecting television movie mode
  • Method, device and display for detecting television movie mode
  • Method, device and display for detecting television movie mode

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Embodiment Construction

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0046] The present invention checks the principle of 3:2 conversion telecine signal as Figure 5 As shown, the corresponding position pixels of two fields adjacent in time and with the same parity are subtracted, for example Figure 5 The field A1 is subtracted from the field B1, the field B2 is subtracted from the field C1, and the absolute value of the difference is used as the absolute pixel difference; then the obtained pixel absolute difference is compared with the preset noise threshold 32 (Noise Threshold 32, NT32), if If it is greater than or equal to the noise threshold NT32, the value of the detection sequence corresponding to the absolute difference of the pixel is taken as a state bit, for example, 1; if it is less than the noise threshold NT32, the value of t...

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Abstract

The invention discloses a telecine signal detecting method, comprising the steps of: A. calculating primary absolute difference between interleaved scanning signals of the (n+2)th and nth frames and according to the primary absolute difference, obtaining a 3 : 2 converted detection sequence; simultaneously, according to two adjacent primary absolute differences, calculating secondary absolute difference and according to the secondary absolute difference, obtaining a 2 : 2 converted detection sequence; B. determining whether the obtained detection sequences accord with the respective standard detection sequences: if yes, it is a telecine signal corresponding to the standard detection sequences; otherwise it is a non-telecine signal. And the invention alos advances a telecine signal detecting device and display. And the invention can effectively improve telecine signal detection accuracy.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a method, device and display for detecting a telecine mode. Background technique [0002] The de-interlacing technology in video processing refers to the processing technology of converting interlaced field images into progressive scanning frame images. The telecine technology uses the method of field duplication to convert the 24 frames per second progressive scanning film signal into an interlaced scanning TV signal, thus realizing the requirement of watching progressive scanning film programs on ordinary interlaced scanning TV. [0003] The interlaced scanning TV signal system currently 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 AlternationLine, PAL) color TV system TV signal. The method of converting film signals to NTSC TV signals...

Claims

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Application Information

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IPC IPC(8): H04N5/253H04N9/11H04N7/01
Inventor 卢子威张喜全
Owner HUAWEI TECH CO LTD