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:
Aug. 15, 1989
Filed:
Apr. 01, 1988
Hitoshi Kanamaru, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A recorded-information reproducing apparatus, such as a video disk player, in which interference generated as a result of pulse-width modulation multiplexing of a luminance signal and eight-to-fourteen modulation digital audio signal is recorded on the recording medium. A low-pass filter is provided to filter the signal read out from the recording medium having a cut-off frequency higher than a white peak of the video FM signal and lower than the frequency of the color subcarrier contained in the upper first sideband of the video FM signal. The filter may take the form of either an electronic filter which filters the read-out signal following detection or a diaphragm for controlling the aperture of an objective lens through which the optical read-out signal passes.