Method and circuit arrangement for adjusting the level or dynami

Details Method and circuit arrangement for adjusting the level or dynami Method and circuit arrangement for adjusting the level or dynami

1996-09-11

1999-05-25

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704227, 4552461, G10L 302, H03G 332

Patent

active

059078235

ABSTRACT:
The invention relates to a method and a circuit arrangement for adjusting the level and/or dynamic range of an audio signal in a transmission system and particularly in a mobile station. According to the invention, the level of acoustic noise in the environment of a terminal (10, 12) and the level and noise level of a received signal are measured (123) and the level and/or dynamic range of the reproduced signal are adjusted (121, 122) according to the results from said measurements. The solution according to the invention helps reduce the effect of noise in the signal transmitted on the transmission channel (11) and of the acoustic noise in the environment of the terminal (12) on the intelligibility of the reproduced information.

REFERENCES:
patent: 4628526 (1986-12-01), Germer
patent: 5036540 (1991-07-01), Eastmond
patent: 5235637 (1993-08-01), Kraz et al.
patent: 5285165 (1994-02-01), Renfors et al.
patent: 5297198 (1994-03-01), Butani et al.
patent: 5406635 (1995-04-01), Jarvinen

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