Patent ID: 6665488
Filing Date: 2003-12-16
Classification: G11B,H04N

Abstract:
A recording format discriminating apparatus for use on a video tape recorder capable of reproducing a signal recorded on a recording medium in one of a digital recording format and an analog recording format by one of a same head rotary system and a plurality of head rotary systems dedicated to analog recording and digital recording respectively, comprising:amplifying means, having a capability of automatically controlling a gain of a signal reproduced by one of the head rotary systems, for amplifying said signal to a predetermined level; first band extracting means for extracting a particular narrow frequency band from the signal amplified by said amplifying means; first comparing and detecting means for detecting by amplification an output of said first band extracting means and comparing the detected output with a first reference value; second comparing and detecting means for integrating and holding the comparison result output of said first comparing and detecting means and then comparing the integrated output with a second reference value; and recording format discriminating means for discriminating the recording format of the signal recorded on the recording medium from the comparison result output of said second comparing and detecting means.