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:
Apr. 22, 1997
Filed:
Nov. 08, 1994
Applicant:
Inventors:
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
371 401 ;
Abstract
An information data detecting apparatus for use in a recording medium playing apparatus detects the presence/absence of information data under software control using an error correction code. The information data detecting apparatus acquires a read signal representing the contents of a specified sector, extracts digital data from the read signal, performs an error-correcting operation on the extracted digital data and produces an error-correctable indicating flag when error correction is possible. When detecting the presence of the error-correctable indicating flag, the information data detecting apparatus produces a written-state signal indicating that the specified sector is used.