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Patent Searching and Data


Title:
INFORMATION RECORDING DISC AND ITS REPRODUCER
Document Type and Number:
Japanese Patent JPS59221184
Kind Code:
A
Abstract:

PURPOSE: To prevent unpleasant noise from being mixed in a reproduced tone by giving an offset to a recording position with switching connection of two sound signals mutually in the direction of track scanning so as to record the signals in the vicinity of the switching recording position of different kinds of programs.

CONSTITUTION: A high frequency reproducing signal extracted from a pickup circuit 3 is applied to a demodulating circuit 4 and also an fp3 (index signal) detector 5 and band pass filters 6, 7. While a signal demodulated by a demodulating circuit 4 is applied to a video signal processing circuit from a terminal 21, the signal is applied to FM demodulators 22, 23, where the sound signal of the 1st channel and the 2nd channel is obtained separately. On the other hand, a pulse of high level having a prescribed period of nearly 1/2 field period is given to a switch circuit 25 from a monostable multivibrator 26 and the sound signal selected by the switch circuit 25 is switched into the sound signal of other channel after a prescribed period elapsed from kick point of time, then the mixture of noise is prevented.


Inventors:
HIRATA ATSUMI
Application Number:
JP9676783A
Publication Date:
December 12, 1984
Filing Date:
May 31, 1983
Export Citation:
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Assignee:
VICTOR COMPANY OF JAPAN
International Classes:
H04N5/76; G11B21/08; G11B27/10; G11B27/30; H04N5/781; H04N5/92; (IPC1-7): H04N5/781
Attorney, Agent or Firm:
Tadahiko Ito