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    • 9. 发明授权
    • Method and device for processing a sequence of source pictures
    • 用于处理源图像序列的方法和装置
    • US08094286B2
    • 2012-01-10
    • US12312968
    • 2007-12-04
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • H03L7/00
    • H04N5/913H04N2005/91392
    • The invention relates to a method for combating the copying of source pictures by means of a camera while they are being displayed, for example using a camcorder in a movie theatre. To this end, it is known, in classical projection systems, to modulate by a carrier wave the brightness of some pixels of the pictures. The frequency of the carrier wave is usually constant and generally half the refresh frequency. The main problem with such systems is that once a pirate has figured out what the modulation frequency is, he can configure his camcorder shutter to filter out this frequency and bypass the anti-camcorder method. According to the invention, the frequency of the carrier is changed at least once throughout the displaying of the sequence pictures or the movie, to defeat all camcorders standards (PAL/NTSC) and shutter configurations.
    • 本发明涉及一种用于在例如使用电影院中的摄像机来显示的同时通过照相机来对源图像进行复制的方法。 为此,在经典投影系统中,通过载波调制图像的某些像素的亮度是已知的。 载波的频率通常是恒定的,通常是刷新频率的一半。 这种系统的主要问题是,一旦盗版者了解了调制频率,他就可以配置摄像机快门来滤除这个频率,并绕过反摄像机的方法。 根据本发明,在整个序列图像或电影的显示期间,载波的频率至少改变一次,以抵消所有摄像机标准(PAL / NTSC)和快门配置。
    • 10. 发明申请
    • METHOD AND DEVICE FOR PROCESSING A SEQUENCE OF SOURCE PICTURES
    • 用于处理源图像序列的方法和装置
    • US20100053431A1
    • 2010-03-04
    • US12312968
    • 2007-12-04
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • Pascal BourdonSylvain ThiebaudDidier Doyen
    • H03L7/00
    • H04N5/913H04N2005/91392
    • The invention relates to a method for combating the copying of source pictures by means of a camera while they are being displayed, for example using a camcorder in a movie theatre. To this end, it is known, in classical projection systems, to modulate by a carrier wave the brightness of some pixels of the pictures. The frequency of the carrier wave is usually constant and generally half the refresh frequency. The main problem with such systems is that once a pirate has figured out what the modulation frequency is, he can configure his camcorder shutter to filter out this frequency and bypass the anti-camcorder method. According to the invention, the frequency of the carrier is changed at least once throughout the displaying of the sequence pictures or the movie, to defeat all camcorders standards (PAL/NTSC) and shutter configurations.
    • 本发明涉及一种用于在例如使用电影院中的摄像机来显示的同时通过照相机来对源图像进行复制的方法。 为此,在经典投影系统中,通过载波调制图像的某些像素的亮度是已知的。 载波的频率通常是恒定的,通常是刷新频率的一半。 这种系统的主要问题是,一旦盗版者了解了调制频率,他就可以配置摄像机快门来滤除这个频率,并绕过反摄像机的方法。 根据本发明,在整个序列图像或电影的显示期间,载波的频率至少改变一次,以抵消所有摄像机标准(PAL / NTSC)和快门配置。