Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Denki Kabushiki

Katsuhiro Ookawa

Yoshihiro Nishida

Toshifumi Fujii

Keiji Hatanaka

A video reproducing apparatus is provided for reproducing at a high speed a video signal from a recorded magnetic tape with the use of a field memory for storing video signal in which the writing in and reading out timing of the video signal for the field memory is changed in accordance with the variation of the envelope signal of the video signal extracted by an envelope detector.

Video recorder with field memory

A video recording and reproducing apparatus which is designed to store a reproduced signal in a field memory when a level of the signal reproduced from the recorded magnetic tape is larger than a previously established predetermined level and to read out the stored content, including detection, circuit for measuring the recording track width on the basis of an envelope detection signal of the reproduced signal which is obtained when the magnetic head traverses the recording track on said magnetic tape; and a circuit for establishing said predetermined level at a level optimum to the reproduction of the signal on the basis of the measured result.

Video recording and reproducing apparatus

A magnetic recording and reproducing apparatus using a pilot signal control system is adapted such that a cue signal (51) is recorded in a cue track (50) provided besides a video signal track (52) when a magnetic tape (7) is temporarily stopped during the recording operation and is moved in the backward direction by a predetermined amount, and when the temporary stop is cancelled and the magnetic tape is moved in the forward direction, the cue signal (51) is reproduced and the recording operation is restarted responsive to the reproduced cue signal. Preferably, after cancellation of the temporary stop until restart of the recording operation, control is made such that coincidence of the frequency and phase of the reproduced pilot signal and those of a pilot signal to be recorded is established.

Magnetic recording and reproducing apparatus in which recording is

A magnetic video reproducer outputs a plurality of pilot signals having different frequencies from a servo circuit (18) in a recording mode, to superpose the pilot signals on video signals outputted from a signal circuit (25) and record the same on video tracks provided on a magnetic tape. In shifting a mode from the recording mode to a stop mode including a pause mode, a capstan motor (19) and a reel motor (20) are reversely rotated so that a cue signal is recorded by a cue head (10) on the magnetic tape in the form of a pulse train, whereafter travelling of the magnetic tape is stopped. When the stop mode is released, a CPU (170) determines whether or not pilot signals reproduced by reverse transfer of the magnetic tape and pilot signals to be newly recorded coincide with each other in frequency and in phase to reproduce the cue signal upon a determination of coincidence, so as to re-start recording operation when the reproduced cue signal is correlated with the cue signal recorded in shifting to the stop mode, thereby to perform program search for a recording starting position.

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Nagaokakyo, Japan

Katsuhiro Ookawa