Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1984-06-13
1987-07-21
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
338310, 338335, H04N 578, H04N 9491, H04N 591
Patent
active
046822500
ABSTRACT:
A video signal recording and reproducing apparatus comprises a first sampling circuit for sampling a recording video signal which has a band with an upper limit frequency f.sub.a and is to be recorded by a sampling signal having a frequency f.sub.s, where the frequencies f.sub.a and f.sub.s satisfying a relation f.sub.a <f.sub.s <2f.sub.a and an equation f.sub.s =(2n+1)f.sub.H /2, n is an integer, and f.sub.H is a horizontal scanning frequency of the recording video signal, a recording and reproducing circuit for recording an output signal of the first sampling circuit on a recording medium and for reproducing the signal from the recording medium, a delay circuit for delaying the signal which is reproduced from the recording medium by the recording and reproducing circuit by a delay time of one horizontal scanning period, a second sampling circuit for alternately sampling input and output signals of the delay circuit by a sampling signal having the frequency f.sub.s, and an adding circuit for adding alternately sampled signals from the second sampling circuit, and for obtaining a reproduced output signal which has essentially been sampled at a frequency of 2f.sub.s.
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Meller Michael N.
Psitos Aristotelis M.
Victor Company of Japan Ltd.
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