Signal time compression or expansion system

Details Signal time compression or expansion system Signal time compression or expansion system

1974-04-29

1976-08-17

Moffitt, James W.

Dynamic magnetic information storage or retrieval

Recording for changing duration, frequency or redundant...

179 1555T, G11B 500

Patent

active

039757633

ABSTRACT:
A signal time compression or expansion system comprises a plurality of gates for permitting the passage of reproduced signals successively with respectively different time bands in contiguous sequence or with partially overlapping parts and without discontinuity with respect to time, the signals having been reproduced with a frequency spectrum scale differing from that at the time of recording, a plurality of memory circuits provided to correspond respectively to the plurality of gates and operating to write in and store the signals thus passed through the corresponding gates, a control circuit for controlling the memory circuits thereby to cause the same to carry out writing in and reading out with respectively specific write-in periods and read-out periods, and a mixer for mixing the signals thus read out from the memory circuit and combining the same into one continuous signal.

REFERENCES:
patent: 3749837 (1973-07-01), Doughty
patent: 3855424 (1974-12-01), Tharmaratram
patent: 3873778 (1975-03-01), Mutjuura

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