Receiver device having a function for suppressing transient nois

Details Receiver device having a function for suppressing transient nois Receiver device having a function for suppressing transient nois

1979-04-18

1980-10-14

Griffin, Robert L.

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

179 1SC, H04B 110

Patent

active

042285453

ABSTRACT:
A receiver device comprises a demodulator for demodulating speech signals received at an input terminal of the device, a delay memory for storing, with a delay, speech signals of prescribed period for a predetermined time, a detector for detecting an abrupt interruption and its period of the received speech signals, a discriminator for discriminating whether the speech signals stored in the delay memory are periodic or non-periodic, an interpolator for creating interpolating information during the abrupt interruption from the signals stored in the delay memory under the control of the detector by receiving the outputs from the discriminator and the abrupt interruption detector, and a switch which is adapted, under the normal condition, to receive and transmit signals from the demodulator to the output of the device, while it is adapted, under the condition that the abrupt interruption and the period thereof is detected, to select signals from the interpolator and to transmit the selected interpolating signals to the output terminal of the device.

REFERENCES:
patent: 3904969 (1975-09-01), Eastmond
patent: 4074069 (1978-02-01), Tokura et al.
patent: 4157457 (1979-06-01), Sakoe et al.

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