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. 17, 2004
Filed:
May. 15, 2002
Yoshinori Tsuboi, Kanagawa, JP;
Masayuki Arai, Tokyo, JP;
Sony Corporation, , JP;
Abstract
An information playback apparatus is disclosed which can play back information with a high degree of accuracy. The information playback apparatus plays back the addresses from a recording medium on which a land address and a groove address are recorded at positions displaced from each other. The information playback apparatus includes an AM detection circuit for detecting an AM read out from the recording medium to produce an AM detection pulse signal, a masking signal production circuit and an AND circuit for removing, when a pickup scans the land, an AM detection pulse produced while the pickup passes the land adjacent an area in which the groove address is recorded but removing, when the pickup scans the groove, an AM detection pulse produced while the pickup passes the groove adjacent an area in which the land address is recorded to produce a synchronism detection signal, and an address data decoding circuit for decoding the information in response to the synchronism detection signal to produce address data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile