Browse Prior Art Database

AUTOMATIC LOUDNESS CORRECTION AT LOW RF SIGNAL STRENGTH

IP.com Disclosure Number: IPCOM000009468D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2002-Aug-27
Document File: 2 page(s) / 151K

Publishing Venue

Motorola

Related People

Reiner Bingel: AUTHOR [+2]

Abstract

Subjectively a signal with smaller field strength seems to be more quiet than a better received signal with the same modulation.

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MOlOROlA Technical Developments

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AUTOMATIC LOUDNESS CORRECTION AT LOW RF SIGNAL STRENGTH

by Reiner Bingel and Hans-Peter G&-tner

INTRODUCTION This noise reduces the clarity of the information signal.

  Subjectively a signal with smaller field strength seems to be more quiet than a better received signal The amount of distortion depends on the fre- with the same modulation. quency spacing of the channel, the wanted tone fre- quency as well as on their relative strengths.

PROBLEM TO BE SOLVED

  The audio quality is substantially reduced from annoying noise.

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Developments Technical 0 M MOTOROLA

  If you have a low signal strength then you have to raise the volume level to get the same feeling of loud- ness as with high signal strength.

Loudness LWd

PROPOSED SOLUTION TO THE PROBLEM

This volume increase can be done automatically. The RSSI level may cause the microprocessor to increase the audio pa level at low RF signal strength.

Automatic Loudness Correction At Low RF Signal Strength

0 Motomla,Inc. 1999 September 1999

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