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:
Jan. 04, 1977
Filed:
Aug. 05, 1975
Guy Le Parquier, Paris, FR;
Thomson-CSF, Paris, FR;
Abstract
The image signal is divided into first and second component signals respectively occupying a lower and a higher frequency band, and the second component signal is translated into the lower frequency band by means of a modulator fed by an oscillator, after which the two component signals are alternately directed, each for the duration of a frame period, to the output of the circuit, bursts of the output signal from the oscillator being added, during the horizontal fly-back intervals, to the frequency translated signal. In the decoding circuit, which is designed to simultaneously receive the signals derived from two reading units, the second of which delivers the recorded signal time shifted by a frame period relatively to the other, the second component signal is retranslated into the higher frequency band by a modulator fed by an oscillator synchronised by mean of the recorded bursts.