Dynamic magnetic information storage or retrieval – Record editing
Patent
1980-07-14
1982-12-14
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
Record editing
360 32, G11B 2702, G11B 500
Patent
active
043640966
ABSTRACT:
An apparatus for reproducing voice signals from a PCM magnetic recording tape which is equipped with a discontinue waveform calibrator which comprises a control signal generator for detecting an edited part from PCM signal rows reproduced from the magnetic tape and for transmitting a control signal; a first memorizing means for memorizing at least one word part of the PCM signal rows which are sequentially imputted; a second memorizing means for memorizing specific words of the PCM signal rows overflowed from the first memorizing means; a third memorizing means for memorizing at least one word part of the PCM signal rows overflowed from the memorizing means; a first weighing means for multiplying a gradually increasing weight from X0 to X1 to the memorized data of the first memorizing means upon receiving the control signal to output it; a second weighing means for multiplying a gradually decreasing weight from X1 to X0 to the memorized data of the third memorizing means upon receiving the control signal; an adder for summing gradually output signals of the first and second weighing means; and a switch for switching to receive as an input the PCM signal overflowed from the third memorizing means in the normal state and switching the PCM signal output from the adder into the decoder upon receiving the control signal.
REFERENCES:
patent: 3190969 (1965-06-01), Mattis
patent: 3683164 (1972-08-01), Minami
patent: 4163261 (1979-07-01), Ito
"Pulse-Code-Modulation Recording System", Iwamura et al., J. Audio Eng'r Soc. 9/73, vol. 21 #7.
Onishi Ken
Ozaki Minoru
Canney Vincent P.
Mitsubishi Denki & Kabushiki Kaisha
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