The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1986
Filed:
Mar. 12, 1984
Yutaka Ichinoi, Yokohama, JP;
Naomichi Nishimoto, Tokyo, JP;
Abstract
A video signal dropout compensation circuit is provided in a reproducing apparatus which reproduces a recorded signal from a recording medium recorded with a time-division-multiplexed signal which has been frequency modulated. The apparatus frequency-demodulates a reproduced frequency modulated time-division-multiplexed signal in a demodulator, and time base expands a time base compressed line-sequential color difference signal and a time base compressed luminance signal within a reproduced time-division-mulitplexed signal back to an original time base to obtain a reproduced line-sequential color difference signal and a reproduced luminance signal. The compensation circuit comprises a detecting circuit for producing a dropout detection signal when the reproduced frequency modulated time-division-multiplexed signal assumes a level smaller than a preset level, a switching circuit controlled in response to an output signal of the detecting circuit, and a delay circuit for delaying an output signal of the switching circuit by a delay time of two horizontal scanning periods. The switching circuit selectively supplies to the demodulator and the delay circuit the reproduced frequency modulated time-division-multiplexed signal while the dropout detection signal is not produced from the detecting circuit, and the output signal of the delay circuit while the detecting circuit produces the dropout detection signal.