Patent ID: 8599650
Filing Date: 2013-12-03
Classification: G04R

Abstract:
1. A marker detecting apparatus comprising: a signal input section adapted for receiving a time code signal, the time code signal having a plurality of frames each of which includes a plurality of pulse signals cyclically disposed, each pulse signal being either one of a marker pulse signal and a non-marker pulse signal, the marker pulse signal being disposed at a prescribed position in any of the frames; a level detecting section adapted for detecting, for each of the pulse signals in each of the frames, a signal level of the pulse signal at a plurality of points included in a marker characteristic period when an ideal marker pulse signal and an ideal non-marker pulse signal are presumed to be different in the signal level, so as to detect a match between the pulse signal and the ideal marker pulse signal in the signal level; a calculating section adapted for calculating, for each of the pulse signals in each of the frames, a match-detected number indicating a number of the matches detected by the level detecting section within the marker characteristic period of the pulse signal; a plurality of memory spaces each adopted for storing the match-detected number for one of the pulse signals in association with a pulse position within one frame, the pulse position corresponding to an order of the pulse signal within the one frame; an adding section adapted for adding the match-detected numbers each corresponding to the pulse position having a same order within each of the frames; and a marker determining section adapted for determining at which pulse position in the frames the marker pulse signal is disposed, based on the added match-detected number within each of the frames.