Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1994-07-08
1995-05-30
Epps, Georiga Y.
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
36 7701, 36 7712, 36 13, G11B 5584
Patent
active
054207312
ABSTRACT:
A two channel circuit and method for the automatic edit optimization of a recording medium which is operable with a recorder such as a video tape recorder or a disc recorder, utilizes a first channel means including an automatic scan tracking playback head and a second channel means including a record head. First and second rf peak signals indicative of variations in the stored data patterns in the medium are generated for the two channels. The gain of a variable gain amplifier coupled to the automatic scan tracking playback head is adjusted in accordance with a first correction signal derived from the generated first rf peak signal. The gain of a variable gain amplifier coupled to the record head is adjusted in accordance with a second correction signal derived from the generated second rf peak signal. A final correction signal is derived from the first and second correction signals and is fed back to the second channel to normalize the gains of the record head and the playback head variable gain amplifiers to compensate for the variations in the stored data patterns. A tracking signal derived from the second channel is stored and is indicative of record head mistracking. Thus, the correction signals allow a precise edit optimize so that a subsequent edit operation such as an insert edit can be precisely performed using the stored tracking signal.
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Jensen Colin M.
Thomas Ross M.
Almeida George B.
Ampex Corporation
Epps Georiga Y.
Huber P. W.
Mesaros John G.
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