According to some embodiments, there is provided a communication terminal, including: a communication device, a connection processing unit, a device power managing unit and a device power managing unit. Fingerprints are used to identify content generally while watermarks provide more detailed localization of parts within the content, and vice versa. As a result, transforming can be performed by applying the different transform method according to the in-screen prediction mode group. The beam splitter abuts against the main-scanning aperture portion so as not to block a deflected and transmitted beam deflected, and is positioned by abutting against the main-scanning aperture portion.