Magnetic recorder/reproducer

Details Magnetic recorder/reproducer Magnetic recorder/reproducer

1994-10-03

1995-10-24

Canney, Vincent P.

Excavating

360 32, G06F 1100

Patent

active

054616301

ABSTRACT:
A magnetic recorder/reproducer converts two-channel analog signals into digital signals by a sample-and-hold/A-D converter circuit (3) and controls addresses in a memory circuit (4) by a memory address control circuit (5), to distribute the digital signals into odd sample groups and even sample groups per each channel for arraying the odd sample groups and the even sample groups of the same channel in alternate scanning intervals, thereby to write the same in the memory circuit so that the odd samples and the even samples of the same channel are arrayed in positions separated from each other along the direction of scanning by rotary heads (10, 11). The digital signals thus permutated are modulated by a modulation circuit (7), to be recorded in a magnetic tape by the rotary heads. The digital signals reproduced by the rotary heads are demodulated by a demodulation circuit (14), to be stored in a memory circuit (15). A memory address control circuit (16) controls addresses so as to permutate samples of the reproduced digital signals stored in the memory circuit to be in the original array thereof. The reproduced digital signals read from the memory circuit are converted into analog signals by a D-A converter (18), to be outputted through a low-pass filter (19).

REFERENCES:
patent: 4052298 (1977-10-01), Ragle
patent: 4142174 (1979-02-01), Chen et al.
patent: 4211996 (1980-07-01), Nakamura
patent: 4211997 (1980-07-01), Rudnick
patent: 4224642 (1980-09-01), Mawatari et al.
patent: 4506306 (1985-03-01), Viellard
patent: 4544958 (1985-10-01), Odaka
patent: 4685004 (1987-08-01), Takahashi et al.
"On the System Design and The Signal Processing of a Rota Head Data", Yoshinobu Ishida et al., Consumer Electronics Development Lab, Mitsubishi.
"On the Development of a Rotary-Head Digital Audio Tape Recorder", Yoshinobu Ishida et al., 79th Convention, Audio Engineering Society.

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