Data recorder using still framing techniques for information ret

Details Data recorder using still framing techniques for information ret Data recorder using still framing techniques for information ret

1995-07-20

1998-03-17

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

386 80, G11B 15467

Patent

active

057294003

ABSTRACT:
An automatic scan tracking, helical tape type of data recorder is disclosed herein along with its method of operation. Data is written onto magnetic recording tape along with data retrieval information by means of a rotating scanner assembly forming part of the recorder as the recording tape moves at a given recording speed in cooperative engagement with the scanner assembly. Data is normally retrieved from the recording tape along with the data retrieval information by means of the rotating scanner assembly as the recording tape moves longitudinally at the same given recording speed. In operation, the rotating scanner assembly of the recorder retrieves data and data retrieval information from a segment of the recording tape while the latter is not moving, that is, during a period when the tape is stationary for enabling adjustment of the read head position relative to the track depending on the evaluation of the data resulting from the stationary tape read. Provision is also made for causing the rotating scanner to retrieve data retrieval information from a segment of the recording tape while the latter is accelerating from a still state to its given recording state, with subsequent evaluation of the data and adjustment based on the results.

REFERENCES:
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patent: 4215362 (1980-07-01), Ravizza
patent: 4494153 (1985-01-01), Ravizza
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patent: 5335119 (1994-08-01), Shih et al.
"The Development of the Ampex AST System" by Mark Sanders (appearing in Video Systems, Apr. 1980, pp. 46-53).
"Video Head Assemblies and Scanners" by John W. King and Dennis Ryan, pp. 89-101.
SMPTE 247M, "19-mm Type D-2 Composite Format" SMPTE Journal, Jul. 1990, pp. 592-600.

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