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:
Apr. 28, 1981
Filed:
Jun. 28, 1979
Liston Abbott, East Windsor, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
When two color television signals are transmitted over a common non-linear path, such as a transponder in a communications satellite, the two color subcarriers at slightly different frequencies cross modulate each other and produce disturbances on the screens of color monitors and receivers. The color cross talk can be cancelled by delaying alternate lines between horizontal synchronizing pulses of solely one of the television video signals by half the period of the color subcarrier at the transmitting terminal, and delaying intermediate lines between horizontal synchronizing pulses of solely the same television video signal by half the period of the subcarrier at the receiving terminal. Color synchronizing disturbances in television receivers receptive to the same one of the video signals are avoided by cancelling the color subcarrier frequency components on the horizontal synchronizing pulses of the video signal at the receiving terminal.