Abstract: A remote control method for an audio/visual system which can perform protection during execution of a system feature and is convenient in use is applied to an audio/visual system wherein each of a plurality of units of audio/visual equipment includes a microcomputer for controlling operation of the audio/visual equipment. The microcomputers of the audio/visual equipment are connected to each other by way of a bus system. One unit of the audio/visual equipment is set as an audio/visual center equipment. The audio/visual center equipment controls the entire system in a concentrated manner. The audio/visual center equipment receives remote control signals in a concentrated manner without causing remote controller receiver sections of the audio/visual equipment other than the audio/visual center equipment to function and transfers necessary commands to the other audio/visual equipment.

Abstract: There is a communication system using a bi-directional bus, which includes a plurality of devices (e.g., TV image receiver or video tape recorder, etc.) connected to each other.

Abstract: A communication system using a bi-directional bus, comprises a plurality of devices (e.g., TV Image Receiver, Video Tape Recorder, etc. ) respectively including sub-devices (e.g., Monitor Image Receiver, TV tuner, Video Deck, etc.) adapted for executing the operation for a received control command.

Abstract: An optical disc player comprising a preliminary focus control circuit for repeatedly effecting preliminary focus control to bring a focusing control circuit arrangement for a beam of light falling on a disc into a mode of focus control operation, and detecting means for detecting an abnormal operation in the preliminary focus control, wherein an instance in which the disc is improperly loaded with the beam of light falling on a non-information-recorded surface thereof can be detected on the basis of an output signal from the detecting means.

Abstract: A disc player for reproducing an information signal from a rotating disc having record tracks defined by successive turns of a spiral signal path in which the information signal is recorded, which is adapted to perform a small scale track jump operation for rapidly moving the reading position determined by a pick-up device in the direction transverse to the spiral signal path on the disc to a relatively short distance repeatedly in the fast forwarding or fast reversing mode and is so arranged that the number of times of the small scale track jump operation performed repeatedly for a certain period in the fast reversing mode is larger than the number of times of the small scale track jump operation performed repeatedly for the same certain period in the fast forwarding mode, whereby the substantial moving distance measured along the spiral signal path in respect of the reading position by the pick-up device moved for the certain period in the fast forwarding mode coincides with or closes to the substantial mov

Abstract: A device for displaying addresses on a record medium which has program information and address information recorded thereon to form a plurality of program information recorded portions each containing at the beginning part thereof a pause division where no program information is recorded, the device comprises detecting means for detecting the pause division by discriminating the contents of specific address information which is contained in reproduced address information obtained from the record medium, means for producing reformed address information composed of modified time address information obtained by modifying time address information contained in the reproduced address information and positional address information contained in the reproduced address information, and display means for making a visual display of the contents of the reformed address information with a minus mark when the pause division is detected by the detecting means and making a visual display of the contents of the reproduced addr

Abstract: In an optical reproducing apparatus including an optical pickup device directing a light beam at a record medium surface and having at least one photodetector which produces a focus error signal in accordance with the state of focus of the light beam in respect to the record medium surface, and a focus control device responsive to a drive signal for controlling the focus of the light beam in respect to the record medium surface; there are provided a signal generator for producing a preliminary focusing signal which initially varies rapidly toward a first predetermined level of one polarity and then varies relatively slowly toward a second predetermined level of opposite polarity; a detecting device for detecting a zero crossover point of the focus error signal and producing an output signal which varies from a first level to a second level when the zero crossover point is detected; and switching circuitry for supplying the preliminary focusing signal to the focus control device as the drive signal for the lat

Abstract: A device for rapidly moving an optical pick-up device in an optical reproducing apparatus to a desired position on a record disc having a plurality of record tracks with an information signal recorded therein, includes a tracking error signal generating circuit for producing a tracking error signal corresponding to deviation of the pick-up device from the center of each record track; a drive device for moving the pick-up device in a direction transverse to the record tracks; and a track jump signal forming circuit for producing a track jump signal comprised of a drive signal followed by a brake signal, in response to the tracking error signal, the drive signal having a duration corresponding to the number of tracks traversed by the pick-up device and the brake signal having a duration corresponding to the speed of movement of the optical pick-up device in traversing the tracks, and for supplying the track jump signal to the drive device to control the latter to rapidly move the optical pick-up device in a dir