Title:
【発明の名称】ビデオ素材を劇場スクリーンから不法入手することを防止するための方法および装置
Document Type and Number:
Japanese Patent JP2002519724
Kind Code:
A
Abstract:
A method and device for preventing video tape piracy of video material shown by an electronic projector by varying frequently the frame rate, line rate or pixel rate of the projector. In a preferred embodiment the frame rate is varied in accordance with a cryptographically secure algorithm. In another embodiment the frame rate is varied in accordance with the content of the scene in the film.
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Inventors:
Michael epstein
Douglas Ur Stanton
Douglas Ur Stanton
Application Number:
JP2000556502A
Publication Date:
July 02, 2002
Filing Date:
June 10, 1999
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H04N5/74; G03B31/00; (IPC1-7): G03B31/00
Attorney, Agent or Firm:
Akihide Sugimura (2 outside)