| 摘要 |
<p>PURPOSE:To prevent a picture just after the transition from a normal reproduction mode to a slow reproduction mode from noizing on its upper and lower parts by averaging a tracking error voltage at the time of a first still reproduction in the slow reproduction mode and controlling the next normal reproduction based on the averaged voltage. CONSTITUTION:A slow reproduction is carried out by repeating a still reproduction and a normal reproduction with a magnetic tape recorded with pilot signals for tracking together with video signals. When the magnetic tape is stopped in order to switch over from the normal reproduction mode to the first still reproduction of the slow reproduction mode, a tracking error voltage is averaged to obtain a voltage almost equivalent to the tracking error voltage during the slow reproduction, and the next normal reproduction is then controlled based on the obtained voltage. Consequently, no tracking error is occurred upon the slow reproduction just transited from the normal reproduction, thus preventing a picture from noizing on its upper or lower part.</p> |
