US 4,476,499 AGranted

Video disc recording and reproducing system

AssigneeUniversal Pioneer Corporation

InventorsHitoshi Kanamaru, Toshiyuki Amaya, Kazutoyo Ishiguro, Keiji Masaki

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Abstract

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.

Claims9

Dependent claims

A video disc recording and reproducing system comprising:

(a) a video disc for recording frequency-multiplexed video and audio signals recorded on said video disc in two channels thereon and control signals including program signals partly substitutes for a portion of said audio signals;
and
(b) a video disc player including:
(i) demodulator circuits for demodulating said video and audio signals recorded on said video disc and outputting said video and audio signals to respective output terminals thereof;
(ii) a central processing unit for demodulating said audio signal for detecting said control signal recorded on said video disc from a signal supplied on an output terminal of one of said demodulators;
(iii) a manually-operated switch connected to selectively supply and inhibit supply of said signal supplied on said output terminal to said central processing unit and to a respective one of said output terminals;
(iv) a memory for storing said control signal, said central processing unit controlling said memory to store said control signal when said central processing unit detects said control signal and reproducing said video and audio signals from predetermined locations corresponding to the control signal thus stored in a predetermined sequence, at a predetermined time and in a predetermined mode;
(v) means for inhibiting the supply of the output from said audio signal demodulator circuit connected to said central processing unit to said audio signal output terminals thereof when said central processing unit has detected said control signal;
and wherein said video disc partly records said control signal only in the channel of said one audio signal, and said video disc player outputs said audio signal of the other channel instead of said audio signal of the one channel to said audio signal output terminals thereof when said central processing unit has detected said control signal.

6 more elements

A video disc recording and reproducing system comprising:

a video disc for recording frequency-multiplexed video and audio signals thereon, said audio signal is partly substituted by control signals including a plurality of program data signals in a waveform of a combination of two different frequency sinusoidal signals located at predetermined portion on said disc;
a video disc player including;
demodulator circuits for demodulating said video and audio signals together with said plurality of program data signals recorded on said video disc and outputting demodulated video and audio signals to output terminals thereof;
a central processing unit for controlling the operation of said system in response to stored program data consists of series of instruction signals, said central processing unit further separating said plurality of program signals from said demodulated audio signals supplied by said demodulator circuits;
a memory means for storing said prurality of program data signals separated by said central processing unit as said stored program data for providing said instruction signals to said central processing unit;
switching means for preventing said output terminal from being supplied demodulated audio signal when said central processing unit is separating said plurality of program signals.

3 more elements

Dependencies are inferred from the claim text.