Mobile telephone set and mobile telephone system

Details Mobile telephone set and mobile telephone system Mobile telephone set and mobile telephone system

1997-01-13

2000-01-25

Eisenzopf, Reinhard J.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455462, H04B 138

Patent

active

060186704

ABSTRACT:
A telephone system includes a mobile telephone set having a signal processing unit which is coupled through an amplifier unit to a microphone and at least one speaker. The telephone system also includes a stationary base station for communicating with the mobile telephone set. The signal processing unit has a digital signal processor with an associated memory. A hands-free function is accomplished through the use of the additional signal processor. An echo suppressor or echo compensation function realized by the digital signal processor can be reduced or turned off.

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"SPS51--A universal Interface for hands-free Telephony, Speech Recognition and Speech Storage in the Car Telephone" (Schlegel) Philips Telecommunication Review, vol. 48, No. 4, Dec. 1990.
"Wireless telephone equipment", Funkschau, Oct. 1995.

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