Helical scan type magnetic recording and reproducing apparatus

Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium

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Details

386108, 386 96, 360 18, H04N 979, H04N 591

Patent

active

056424574

ABSTRACT:
A helical scan type magnetic recording and reproducing apparatus records/reproduces a video signal and a audio signal on/from tracks formed on a magnetic tape obliquely with respect to a longitudinal direction of a magnetic tape wound on a rotary drum. When a multiplexed signal containing a frequency modulated luminance signal and a low frequency converted chrominance signal and a frequency modulated audio signal which are related to an analog video signal are recorded/reproduced, the rotary drum is rotated in synchronism with a frame pulse of the analog video signal. When a digital video signal is recorded/reproduced, the rotary drum is rotated at a speed 1.25 times that when an analog video signal of the NTSC system is recorded/reproduced and at a speed 1.5 times that when an analog video signal of the PAL or SECAM system is recorded/reproduced.

REFERENCES:
patent: 4963991 (1990-10-01), Honjo
patent: 5128775 (1992-07-01), Suziki et al.
patent: 5394275 (1995-02-01), Itetani et al.
patent: 5414566 (1995-05-01), Oba et al.

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