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:
Jan. 15, 1991
Filed:
Dec. 08, 1988
Yoshio Sugimori, Tokyo, JP;
Yoshihide Kimata, Tokyo, JP;
Tadao Kurosaki, Tokyo, JP;
Joji Urano, Tokyo, JP;
Nippon Television Network Corporation, Tokyo, JP;
Abstract
An anti-ringing device for a television signal transmission system in which the frequency band of a luminance component of a video signal from an image device is limited to prevent visible ringing at the receiver. The device includes a signal delay circuit 2 for delaying the video signal obtained by the image device, a low-pass filter 3 capable of changing the frequency band limitation characteristics thereof, a discriminator 4 for providing an output when the luminance component of the video signal contains a source of ringing, and a switch 5 for normally connecting the output of the delay circuit to a signal processor 6. The switch is responsive to the output of the discriminator for connecting the low-pass filter to the signal processor instead of the delay circuit, whose delay time corresponds to the signal processing time required in the discriminator.