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. 16, 2003
Filed:
Nov. 11, 1999
Masayasu Kaneko, Ibaraki, JP;
Shoji Nemoto, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A recording format discriminating apparatus for use on a video tape recorder capable of reproducing a signal recorded on a recording medium in a digital recording format or an analog recording format by one and same head rotary system or a plurality of head rotary systems dedicated to analog recording and digital recording respectively. The apparatus comprises: an amplifier, having a capability of automatically controlling a gain of a signal reproduced by one of the head rotary systems, for amplifying the signal to a predetermined level; a first band extracting circuit for extracting a particular narrow frequency band from the amplified signal; a first comparator and detector for detecting by amplification an output of the first band extracting circuit and comparing the detected output with a first reference value; a second comparator and detector for integrating and holding the comparison result output of the first comparator and detector and then comparing the integrated output with a second reference value; and a recording format discriminating circuit for discriminating the recording format of the signal recorded on the recording medium from the comparison result output of the second comparator and detector.