DLP based anti-piracy display system

Zhongpai Gao, Guangtao Zhai, Xiaolin Wu, Xiongkuo Min, Cheng Zhi
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引用次数: 15

Abstract

Camcorder piracy has great impact on the movie industry. Although there are many methods to prevent recording in theatre, no recognized technology satisfies the need of defeating camcorder piracy as well as having no effect on the audience. This paper presents a new projector display technique to defeat camcorder piracy in the theatre using a new paradigm of information display technology, called temporal psychovisual modulation (TPVM). TPVM exploits the difference in image formation mechanisms of human eyes and imaging sensors. The images formed in human vision is continuous integration of the light field while discrete sampling is used in digital video acquisition which has "blackout" period in each sampling cycle. Based on this difference, we can decompose a movie into a set of display frames and broadcast them out at high speed so that the audience can not notice any disturbance, while the video frames captured by camcorder will contain highly objectionable artifacts. The proposed prototype system built on the platform of DLP® LightCrafter 4500™ serves as a proof-of-concept of anti-piracy system.
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基于DLP的防盗版显示系统
摄像机盗版对电影行业的影响很大。虽然有许多方法可以防止在剧院录音,但没有一种公认的技术既能满足打击盗版摄像机的需要,又不会对观众产生影响。本文提出了一种新的投影仪显示技术,利用一种新的信息显示技术范式,称为时间心理视觉调制(TPVM),来打击剧院中的摄像机盗版。TPVM利用人眼和成像传感器在成像机制上的差异。人眼视觉中形成的图像是光场的连续积分,而数字视频采集采用离散采样,每个采样周期都有“停电”期。基于这种差异,我们可以将电影分解成一组显示帧,并以高速播放的方式将其播放出来,使观众察觉不到任何干扰,而摄像机捕捉到的视频帧将包含非常令人反感的伪影。拟议的原型系统建立在DLP®LightCrafter 4500™平台上,作为反盗版系统的概念验证。
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