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:
Oct. 22, 1991
Filed:
May. 10, 1990
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A luminance signal/color signal separating circuit comprises a comb filter for Y/C separation. The addition output of the comb filter comprises a luminance signal component, while the subtraction output comprises a color signal component and non-correlation components of a luminance signal. The non-correlation components in the subtraction output are extracted by a trap circuit and added to the addition output of the comb filter. Accordingly, the degradation of vertical direction resolution of reproduced signal will be prevented. Also, under some circumstances, the extracted non-correlation components are previously enhanced before being added to the luminance signal. The noise reduction circuit in reproduction mode shares the above comb filter for color signal separation. When dropout occurs, the color signal in the output of the 1H delay circuit of the comb filter is inverted and separated to be used as a drop out compensation signal.