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:
Sep. 04, 1990
Filed:
Mar. 13, 1989
Masahiro Kitaura, Nagareyama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A recursive noise-reducer for a high-definition TV system includes an interpolation device for performing two-frame interframe interpolation on the input digital signal. A delay device delays the input digital signal by one frame period and two frame period. An output signal from the delay device is separated into a one-frame-preceding signal component and a two-frame-preceding signal component. A first subtracter derives a difference between the input digital signal and the one-frame-preceding signal component. A filter filters an output signal from the first subtracter and passes a signal component having a recursion with a period corresponding to one frame. A second subtracter derives a difference between the input digital signal and the two-frame-preceding signal component. An adder adds the input digital signal, an output signal from the filter, and an output signal from the second subtracter. The interpolation device operates to alternately select an output signal from the adder and the one-frame-preceding signal component and to thereby generate the interpolated signal from which noise components are effectively reduced.