High-speed holographic correlation system by a time-division recording method for copyright content management on the internet

摘要

Using a holographic disc memory on which a huge amount of data can be stored, we constructed an ultra-high-speed,all-optical correlation system. In this method, multiplex recording is, however, restricted to “one page” on “one spot.” Inaddition, signal information must be normalized as data of the same size, even if the object data size is smaller. Therefore,this system is difficult to apply to part of the object data scene (i.e., partial scene searching and template matching),while maintaining high accessibility and programmability. In this paper, we develop a holographic correlation system bya time division recording method that increases the number of multiplex recordings on the same spot. Assuming that afour-channel detector is utilized, 15 parallel correlations are achieved by a time-division recording method. Preliminarycorrelation experiments with the holographic optical disc setup are carried out by high correlation peaks at a rotationalspeed of 300 rpm. We also describe the combination of an optical correlation system for copyright content managementthat searches the Internet and detects illegal contents on video sharing websites.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.