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. 27, 1977
Filed:
Sep. 29, 1976
Applicant:
Inventor:
John P Rossi, New York, NY (US);
Assignee:
CBS Inc., New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 13 ;
Abstract
NTSC television signals are digitally encoded at sub-Nyquist rates by placing the alias components into those parts of the spectrum not normally occupied by the luminance or chrominance components of the video signal. In a system described, the sampling frequency, f.sub.s, is exactly 2f.sub.sc + 1/4f.sub.h or 2f.sub.sc - 1/4f.sub.h, where f.sub.sc is the NTSC color subcarrier frequency and f.sub.h is the line-scan frequency. Most of the alias signals in the thus encoded signal are removed from the baseband video by comb filtering between f.sub.s - f.sub.y and f.sub.v, where f.sub.v is the baseband video bandwidth.