Abstract: Disclosed herein is a video communication apparatus. A LAN connection unit connected to a LAN so as to connect to the Internet. A modem provides access to a PSTN. A DSP processes digital signals received from the LAN connection unit and the modem, and converts internal signals into digital signals. A CPU receives standard signals, and to converts them into signals suitable for a TV, or directly/indirectly receives signals through a terrestrial wave/cable broadcast signal reception unit or camera signals and transmits them to the DSP. A memory unit records programs and protocols. A PIP processing unit directly/indirectly receives signals from the CPU or the terrestrial wave/cable broadcast signals, receives adjustment commands for image compilation, and transmits compiled signals so as to arrange images, to be displayed, in a predetermined manner. A TV receives and displays the compiled signals from the PIP processing unit. A user interface inputs commands for the CPU and inputs additional signals for the CPU.

Abstract: An apparatus for calibrating a tilt in a disc player includes a deck base, an optical pickup unit reciprocating in the radial direction of a disc and irradiating optical beams with respect to of the recording surface of the disc, a regulation plate supported on the deck base, a spindle motor secured to the regulation plate, a turntable driven and rotated by the spindle motor, on which the disc is loaded, and a revolving unit for rotating the regulation plate according to the crookedness of the recording surface on the disc. In the disc player tilt calibration apparatus, a cam unit is driven and rotated by a motor which rotates in the forward and reverse directions according to the crooked states on the disc recording surface, to thereby tilt the regulation plate. Accordingly, the tilt of the turntable can be adjusted to resultantly make a regulation work simplified and convenient.

Abstract: A method for calibrating a tilt in a disc player includes a disc insertion judgment step, a focus error output time judgment step, a subtraction step, a disc recording surface judgment step, and a tilt calibration step. In the focus error output time judgment step, an optical pickup unit is made to ascend and then descend for a predetermined time, to then judge a first focus error output time at which a focus error is output during ascending and a second focus error output time at which a focus error is output during descending. A focus error output difference time is obtained by subtracting the FET1 from the FET2. In the tilt calibration step, if the FET is not same as a reference focus error output difference time (FETrf), the turntable is made to rotate, to calibrate a tilt between the optical pickup unit and the disc.