CAPACITY EXPANDER FOR TELEPHONE LINE

A private telephone line expander is disclosed which receives two analog voice inputs. Both input signals are digitized, compressed using full period splicing, and converted back to analog for transmission. One is shifted to the upper half of the telephone line bandwidth. The other remains in the lo...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JAMES M. KRESSE, LESTER H. STAPLES
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MULTIPLEX COMMUNICATION MUSICAL INSTRUMENTS PHYSICS SELECTING SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TRANSMISSION
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Beschreibung
Zusammenfassung:	A private telephone line expander is disclosed which receives two analog voice inputs. Both input signals are digitized, compressed using full period splicing, and converted back to analog for transmission. One is shifted to the upper half of the telephone line bandwidth. The other remains in the lower half. Both are transmitted on the same telephone line. When received both signals are expanded to normal telephone bandwidth and can be connected to two different telephones. DTMF signals are transmitted with each voice transmission.