Voice recording and reproducing apparatus having perpendicular c

Details Voice recording and reproducing apparatus having perpendicular c Voice recording and reproducing apparatus having perpendicular c

1991-05-28

1993-11-23

Hille, Rolf

Pulse or digital communications

Repeaters

Testing

375 39, 375 67, 375 83, 332103, 329304, 360 32, H04B 1406, H04L 512, H03D 322

Patent

active

052651266

ABSTRACT:
A voice signal is modulated using two carriers which are perpendicular to each other. The modulated signal is supplied to a low-pass filter, and then sampled. The sampled data are encoded, and then stored. When the stored data are to be reproduced, the data are decoded, and sampled. The sampled data are supplied to a demodulator through a low-pass filter.

REFERENCES:
patent: 4123710 (1978-10-01), Stuart et al.
patent: 4348699 (1982-09-01), Tsuchiya et al.
patent: 4584534 (1986-04-01), Lijphart et al.
patent: 4656648 (1987-04-01), Vallet
patent: 4910751 (1990-03-01), Einarsson
patent: 5057786 (1991-10-01), Yoshikawa
patent: 5095392 (1992-03-01), Shimazaki et al.

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