Mobile telephone device wherein an adder supplies a sum of audio

Details Mobile telephone device wherein an adder supplies a sum of audio Mobile telephone device wherein an adder supplies a sum of audio

1992-05-11

1997-06-17

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

With control signal

455 89, 381106, H04B 700

Patent

active

056406851

ABSTRACT:
In a mobile telephone device, an adder (17) calculates a sum of (a) an audio signal comprising a talk signal component and a noise component and (b) a generated signal having an out-of audio frequency, as 6 kHz, and a predetermined level and supplies a compressor (21) with the sum as its input signal. The adder and the compressor give a less variable gain to the audio signal of a lower level range than to that of a higher level range. Alternatively, the compressor alone gives the less variable gain to the input signal of the lower level range. A compressed signal is transmitted to a base station as a radio signal and is expanded. For use in a radio communication system of the type in which the generated signal can be given either by the supervisory audible tone or by the reference tone.

REFERENCES:
patent: 2248757 (1941-07-01), Herold
patent: 3602818 (1971-08-01), Anderlecht
patent: 3757254 (1973-09-01), Takahashi et al.
patent: 4025853 (1977-05-01), Addeo
patent: 4034295 (1977-07-01), Kotezawa et al.
patent: 4295223 (1981-10-01), Shutterly
patent: 4823380 (1989-04-01), Kohen et al.
patent: 4910792 (1990-03-01), Takahata et al.
patent: 5095539 (1992-03-01), Leveque
patent: 5133014 (1992-07-01), Pritchard
Patent Abstracts of Japan, vol. 6, No. 259, 17 Dec. 1982.

Affiliated with

Also associated with

Rating

Mobile telephone device wherein an adder supplies a sum of audio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mobile telephone device wherein an adder supplies a sum of audio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile telephone device wherein an adder supplies a sum of audio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2167418