Universal Pioneer Corporation

Pioneer Electronic Corporation

Keiji Masaki

Hitoshi Kanamaru

Toshiyuki Amaya

Kazutoyo Ishiguro

A disk reproducing device which can detect and reproduce information from both a video disk and a digital audio disk. During reproduction of a DAD wherein correction by a time base correcting means is unnecessary, the device presents misoperation and unnecessary operation caused by an output of a time base error producing circuit. The device comprises interrupting means for selectively interrupting supply of an output of a time base error detecting means to a time base correcting means, whereby the output of the time base error detecting means is interrupted during reproduction of a digital audio disk.

Time-base correcting device used in a disk reproducing device

A video disc recording and reproducing system in which a program is stored on a video disc to eliminate the need for the user to manually input a control program. A program and control signal is recorded in place of at least a portion of one of two audio tracks on a video disc along with video signals. The video disc player of the system includes modulator circuits which demodulate the video and audio signals from the disc, a central processing unit connected to the output of the demodulator circuit for demodulating the audio signal for detecting the control signal and program recorded on the video disc, and a memory for storing the control signal and program. The central processing unit controls the memory for storing the program and control signal at predetermined locations corresponding to the state of the control signal.

Video disc recording and reproducing system

An apparatus for reading information from an information recording disc in which the information is recorded successively in the circumferential direction, which includes a timing signal generator for consecutively generating timing pulse signals at a rate proportional to the rotational speed of the recording disc. The apparatus repeats the jump-back operation during pause mode of operation in synchronism with the timing pulse signals.

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Tokorozawa, Japan

Keiji Masaki