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:
Mar. 23, 1976
Filed:
Oct. 10, 1974
Abraham A Goldberg, Stamford, CT (US);
John P Rossi, Bronx, NY (US);
CBS Inc., New York, NY (US);
Abstract
An apparatus and method for digitally encoding an NTSC color television signal in a manner that facilitates comb filtering of the digitally encoded signal. In accordance with the invention there is provided a means for generating a first sampling signal having a characteristic frequency of three times the NTSC color subcarrier signal. Another means is provided for generating a second sampling signal having the same characteristic frequency, this second sampling signal having its sampling reference points interspersed equally in time between the sampling reference points of the first sampling signal. Enabling means, responsive to the NTSC color television signal, are provided for alternately enabling the first and second sampling signals during successive horizontal scanlines of the television signal. Further provided is a means, responsive to the enabled sampling signal, for sampling the television signal. Finally, means are provided for converting the sampled television signal into digital form. In a preferred embodiment of the invention, the first and second sampling signals are opposite phases of a square wave at 10.74 MHz.