Mobile telephone device wherein a compressor circuit performs am

Details Mobile telephone device wherein a compressor circuit performs am Mobile telephone device wherein a compressor circuit performs am

1996-02-14

1998-07-14

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

With control signal

455575, 381106, 333 14, H04B 700

Patent

active

057818487

ABSTRACT:
In a mobile telephone device, the audio compressor (21) performs amplitude compression by giving a less variable gain to an input audio signal which is of a lower level range than it does for an input audio signal which is of a higher level range. Alternatively, 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 the compressor (21) with the sum as its input signal. A compressed signal is transmitted to a base station as a radio signal and is expanded.

REFERENCES:
patent: 2248757 (1941-07-01), Herold
patent: 3602818 (1971-08-01), Andercecht
patent: 3757254 (1973-09-01), Takahashi et al.
patent: 3919654 (1975-11-01), Toumani
patent: 3930208 (1975-12-01), Winter et al.
patent: 4025853 (1977-05-01), Addeo
patent: 4034295 (1977-07-01), Kotezawa et al.
patent: 4295223 (1981-10-01), Shutterly
patent: 4430754 (1984-02-01), Ishigaki et al.
patent: 4449106 (1984-05-01), Ishigaki et al.
patent: 4823380 (1989-04-01), Kohen et al.
patent: 4823392 (1989-04-01), Walker
patent: 4910792 (1990-03-01), Takahata et al.
patent: 5095539 (1992-03-01), Leveque
patent: 5133014 (1992-07-01), Pritchard
patent: 5144675 (1992-09-01), Killion et al.
patent: 5493699 (1996-02-01), Shioda et al.

Affiliated with

Also associated with

Rating

Mobile telephone device wherein a compressor circuit performs am 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 a compressor circuit performs am, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile telephone device wherein a compressor circuit performs am will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1893829