H - Electricity – 04 – N
Patent
H - Electricity
04
N
352/18, 352/20.1
H04N 5/782 (2006.01) G11B 5/40 (2006.01) G11B 5/455 (2006.01) G11B 15/02 (2006.01) G11B 15/04 (2006.01) G11B 15/14 (2006.01) G11B 27/36 (2006.01)
Patent
CA 1221453
AN APPARATUS FOR RECORDING VIDEO SIGNAL ABSTRACT OF THE DISCLOSURE In an apparatus having a record mode for recording video or other information signals in successive parallel information tracks on a record tape by means of a plurality of rotary heads repeatedly scanning across said tape and having respective gaps with different azimuth angles, and in which the apparatus is changeable to a playback mode for causing each of said heads to provide a respective output when it is scanning an information track in which inform- ation signals have been previously recorded by a head with a gap having the same azimuth angle; clogging of one or more of the head gaps which would prevent further recording is detected, in the playback mode, by switching from one to another of the outputs of the heads during each period required for the scanning of the tape by each of the heads, detecting the levels of the head outputs during such switching therebetween, and operating a clog indicator when the detected levels of the head outputs are insufficient during the scanning of the tape by each of the heads. In order to avoid a false clog indication, the operation of the clog indicator is inhibited when the usual fixed head does not reproduce control signals in the playback mode, for example, as when there has been no previous recording of information signals on the record tape.
451427
Nakayama Koichi
Sado Toshiyuki
Sonoda Masakazu
Gowling Lafleur Henderson Llp
Sony Corporation
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