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:
Jun. 06, 1978
Filed:
Mar. 14, 1977
Lee Vern Hedlund, Cinnaminson, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
In a still frame playback mode, a video disc player reproduces a carrier signal which is frequency modulated in accordance with a composite video signal representative of successive repetitions of two interlaced image fields constituting a single image frame and comprising a luminance signal component, a chrominance signal component and synchronizing information, including a color burst. An FM demodulator develops a composite video signal, which is characterized by a 180.degree. phase discontinuity in the chrominance signal component between the frame end and the succeeding frame start. A first inverter circuit inverts the phase of the color burst every other image frame piror to the processing of the composite video signal output in time base correction and drop-out compensation circuits. The corrected output is supplied to a second inverting stage where the phase of the chrominance signal component, exclusive of the color burst, is inverted every other image frame, to provide an output composite video signal conforming to the NTSC format.