Magnetic recording apparatus

Details Magnetic recording apparatus Magnetic recording apparatus

1988-04-14

1990-02-27

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

G11B 1514

Patent

active

049051032

ABSTRACT:
A magnetic recording apparatus includes a rotary drum around which a magnetic tape extends in an angular range substantially equal to 270.degree.. Four pairs of magnetic rotary heads are mounted on the rotary drum. The rotary heads in each of the pairs have a common azimuth angle. Two of the pairs of the rotary heads are angularly spaced substantially at right angles and have track widths greater than a track pitch in a long-play mode and constitute video heads used in both of the long-play mode and a normal-play mode. Other two of the pairs of the rotary heads are angularly spaced substantially at right angles and constitute audio heads. The video heads alternate with the audio heads in a direction of rotation of the rotary drum. During a recording mode where guard bands are provided between video signal recording tracks formed via the video heads, a group of audio signal recording tracks and a group of video signal recording tracks are formed in a deep portion and an outermost portion of a magnetic layer of the magnetic tape respectively. In order to prevent crosstalk between an audio signal and a video signal during a reproduction process, a recorded audio signal is erased from an outermost portion of the tape magnetic layer in an unnecessary region.

REFERENCES:
patent: 4591924 (1986-05-01), Miura et al.

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