Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1985-02-28
1988-08-02
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 101, 360 351, 358312, H04N 578, H04N 9491
Patent
active
047616946
ABSTRACT:
In apparatus for recording/reproducing a composite video signal on and from a rotary recording medium (1), the field of the composite video signal is detected and only odd or even field signal is delayed by one half (H/2) a horizontal scanning period so that the composite video signal is changed to a modified composite video signal which is recorded on the rotary recording medium (1) together with a field distinguishing signal (Sf) produced using the result of the field detection. The field distinguishing signal (Sf) is arranged to be located at a given time position with respect to a predetermined vertical sync signal of every one frame period of the recording signal on a rotary recording medium (1) driven and rotated at a rotational period equal to the vertical scanning period of the composite video signal. This field distinguishing signal is extracted from a reproduced signal obtained in reproduce mode so that field switching is effected using the reproduced field distinguishing signal thereby delaying only even or odd field signal, which has not been delayed on recording, for obtaining a composite video signal having sync signals which with regular interlaced scanning can be performed.
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Hanashiro Yoshiaki
Kinjo Hisao
Okano Keigo
Shudo Katsuyuki
Psitos Aristotelis M.
Victor Company of Japan Ltd.
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