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:
Dec. 26, 1989
Filed:
Apr. 20, 1988
Tatsuro Nagao, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A high speed information retrieval apparatus that carries out program retrieval and reproduction on the basis of program numbers used as subcodes corresponding to individual information programs recorded on the magnetic tape. Two high speed search operations are used in moving the tape from a current position to an object position. A memory is used to store code representations of program positions, and a position information calculation circuit determines tape position based on a detection of tape reel rotation. In one high speed search mode, the memory and calculation circuit output are compared to determine position. In another high speed search mode, the subcode on the tape is compared to a current tape position. When the object program number is stored in the memory, the mechanism block is set to a second high speed running mode by a control circuit. The block stays in that mode until the current tape position comes within a threshold distance of the object position. When the object position is not stored in the memory, or the threshold distance is reached in the second mode, the mechanism block is set to a first high speed running mode.