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Digital cinema anti-camcording method and apparatus based on image frame post-sampling

By controlling the time offset of the bit plane of the digital movie projector to create time gaps, the problem of illegal candid photography in digital cinemas is solved, and an efficient anti-piracy effect that is safe and does not affect the audience experience is achieved.

Inactive Publication Date: 2010-01-06
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other protection schemes, such as those based on lasers, are dangerous to moviegoers, or their effectiveness is uncertain

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The method and device of the present invention are designed to improve technical protection against candid shots in digital cinemas by applying non-intrusive image processing techniques.

[0019] There have been many attempts to technically prevent video recording in movie theaters. So far, no technology has been recognized to meet this need. There are three types of anti-surveillance methods against which the present invention can be compared.

[0020] The first category is methods for locating and obscuring cameras making illegal recordings / images. These methods use a scanning light beam that is sent from the main screen area towards the viewer and reflected back from the illuminated object. Reflections from camera components and lenses are received and analyzed to detect the location of cameras making illegal recordings. Once a camera making an illegal recording is detected, a beam of light is directed to its lens, thereby hindering the capture / recording of the fi...

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PUM

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Abstract

A method and apparatus for projecting digital video content and for discouraging recording of the projected video content using a video camera or other sampling recording device are described, including accepting a frame of digital video content, time-shifting a bit-plane of the frame of the digital video content at a phase difference, projecting the time-shifted frame, repeating the accepting, time-shifting and projecting acts for a number of frames, adjusting the phase difference and repeating all of the above acts. Also described are a method and apparatus for generating an indication of amid-scale level bit-plane of a frame of digital video content, including accepting a frame of digital video content, accepting a selection of mid-scale level bit-plane of the frame and generating an indication of the selection of the mid-scale level bit-plane of the frame. Time-shifting bit-planes of a frame generates in the recorded video a flicker.

Description

technical field [0001] The present invention generally relates to the anti-sneak shooting of digital movie image frames, and specifically relates to the anti-sneak shooting of digital movies using post-sampling of image frames. Background technique [0002] Illegal candid shots in digital cinemas have harmfully affected the copyrights of film creators and the operations of work studios and theaters. There are different approaches to anti-piracy. Some of these protection schemes are annoying to the audience. Other protection schemes, such as those based on lasers, are dangerous to moviegoers, or their effectiveness is uncertain. [0003] It would be advantageous to have a safe and effective anti-surveillance method and apparatus that creates enough distraction on incoming illegal images without interfering with the quality of digital movie viewing. The present invention solves the above problems and is safe and non-intrusive. Contents of the invention [0004] The prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/913
CPCH04N9/3197H04N9/3179H04N9/3123H04N21/4402H04N21/41415H04N5/913H04N2005/91392H04N21/4223
Owner THOMSON LICENSING SA