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Film cadence detection

A rhythm and film technology, applied in the field of film rhythm detection, which can solve the problems that the film rhythm detector cannot give instructions, and the film rhythm detector is not very flexible.

Inactive Publication Date: 2009-11-04
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, film tempo detectors are only able to detect a limited repertoire of pulldown patterns, and in this respect such film tempo detectors are not very flexible
In case the input video signal includes pulldown patterns not included in this limited list, the film tempo detector does not give an appropriate indication

Method used

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Embodiment Construction

[0029] figure 1 Pictured is the video system VSY. The video system VSY includes a video source VSC, a video display driver VDD, a display device DPL, and a remote control device RCD. More specifically, the video display driver VDD includes an input circuit INP, a film tempo detector FCD, a frame rate converter FRC, an output circuit OUT and a controller CTRL. The video source VSC may be eg a video recorder, a video broadcast receiver, or a communication network interface for downloading video from a server. The display device DPL may be, for example, a flat panel display of the liquid crystal type.

[0030] The video display driver VDD basically operates as follows. Video display driver VDD receives video input signal VA from video source VSC. The video display driver VDD can receive other video input signals VB, VC from other video sources. The user can select one of the video input signals VA, VB, VC via his or her remote control device RCD. Assume that the user has se...

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PUM

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Abstract

The present invention discloses a film cadence in a video signal (VA) is detected in the following manner. Successive classification indications (BcN, BcN-1, BcN-2, ) are generated for successive images within the video signal. A classification indication belongs to a particular image and indicates whether that particular image is an original image or a repeat image. A condition is checked for at least X successive classification indications, X representing a natural number in a given range. The condition is that each one of the at least X successive classification indications is equal to the X-th previous classification indication. If the condition is true, a pattern indication (PI) is provided, which corresponds with the natural number that X represents. If the condition is false, the condition is checked anew with X representing another natural number in the given range.

Description

technical field [0001] Aspects of the invention relate to a film cadence detection method for detecting specific pull-down patterns that may exist in a video signal. Other aspects of the invention relate to movie tempo detectors, video systems, and computer program products for programmable processors. Background technique [0002] Video signals are typically in a format providing 50 or 60 images per second. Depending on whether the format provides interlaced or progressive scanning, the images may be fields or frames respectively. In contrast, motion picture, another term for film, typically has a format that provides 24 or 25 images per second. Also, images are usually recorded on film by photographic processing. [0003] A process called telecine is commonly used to convert moving pictures into video signals. Telecine processing involves picture rate conversion. In many cases, the image of the original motion picture is repeated one or more times in order to achieve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/44H04N5/253H04N7/01H04N7/26
CPCH04N21/440281H04N7/012H04N7/0115H04N7/26893
Inventor D·兹纳门斯基C·N·科德斯
Owner KONINK PHILIPS ELECTRONICS NV