SPEECH PROCESSOR USING MULTIBAND CONTROLLED CENTER CLIPPING

SPEECH PROCESSOR USING MULTIBAND CONTROLLED CENTER CLIPPING

An echo suppressor for full duplex telephone circuits consists of a filter bank of contiguous band filters in the transmission path, with each filter output feeding a separate center clipper. Each clipping level is controlled by echo signal amplitude as attenuated by the trans-hybrid loss that occur...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DAVID ARTHUR BERKLEY, OLGA MARY MRACEK MITCHELL, JOHN ROBINSON PIERCE
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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Beschreibung
Zusammenfassung:An echo suppressor for full duplex telephone circuits consists of a filter bank of contiguous band filters in the transmission path, with each filter output feeding a separate center clipper. Each clipping level is controlled by echo signal amplitude as attenuated by the trans-hybrid loss that occurs in the corresponding subband. The scheme permits "double-talking" while suppressing the echo component.