Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1988-03-01
1989-01-03
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 371, 360 381, 358319, 358336, 358339, 371 47, H04N 594
Patent
active
047962437
ABSTRACT:
A time base correcting circuit for a digital video tape recorder incorporates a circuit improvement which ameliorates the consequences of erroneous synchronizing address data which is at times supplied with the digitized video signal. Since normally the synchronized address data is incremented for each subsequent block of digital data, the circuit compares incoming synchronized address data to an internally calculated address data field. If the incoming synchronized address data does not match the self-generated synchronized address data, the self-generated address data is substituted for the incoming address data. Preferably, the correction is provided only over short predetermined periods. The circuit reduces degradation of the video signal which is otherwise caused by reception of inaccurate synchronized address data.
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Smpte Journal, No. 3, vol. 89, Mar. 1980, pp. 173-180, "An Experimental Digital Video Tape Recorder"; Yokoyama et al.
NEC Corporation
Psitos Aristotelis M.
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