Abstract:
An apparatus for combining a broadcasting channel may include a channel detector to detect a vacant Radio Frequency (RF) broadcasting channel used by a photoelectric converter that converts a first broadcast program as an optical signal to a first RF signal, a broadcast receiving interface to receive at least one second broadcast program, a broadcast modulator to generate a second RF signal by modulating the second broadcast program using the vacant RF broadcasting channel, and a channel combiner to combine a broadcasting channel used for the first RF signal and the vacant RF broadcasting channel.
Abstract:
Disclosed are a network protocol for contents protection in a digital cable broadcasting service and a conditional access system using the protocol. A method for renewing conditional access client software (CACS) by a conditional access module in a renewable conditional access system (RCAS) may include: receiving an RCAS announcement message from a headend; transmitting to the headend a key registration request message for requesting an authorization key when the RCAS announcement message is authenticated; receiving a key registration response message including the authorization key from the headend; and generating security factors based on the authorization key and renewing the CACS by using the security factors.
Abstract:
Disclosed herein are an apparatus and method for obtaining spatial information using an active array lens. In order to obtain spatial information in the apparatus for obtaining spatial information including the active microlens, at least one active pattern for varying a microlens' focus is determined by controlling voltage applied to a pattern of the active microlens, and at least one projection image captured by the at least one active pattern is obtained in a time-division unit.
Abstract:
An autostereoscopic three-dimensional projector includes a MicroElectroMechanical System (MEMS) processor, a virtual movable lens array, and a projection lens, the MEMS processor transfers each view image of the multiview image to a virtual movable lens array with different angles, the virtual movable lens array projects each of multiview images that are input with different angles to different locations of the projection lens, and the projection lens outputs the multiview image to a screen.