System and method for adjusting an audio signal

A system for adjusting a volume level for an audio signal for a communication device in compliance with a quality threshold, said system comprising:

• a module to accept a request for change of volume for said audio signal;
• a module to receive said audio signal and convert said audio signal to a digitized audio signal;
• a microprocessor;
• a digital signal processor for processing said digitized audio signal and producing a digital output signal utilizing a filter, said digitized audio signal and a set of parameters;
• a first module providing a set of instructions operating on said microprocessor, said set of instructions:
• determining when said request for said change of volume occurs;
• identifying a new volume level for said audio signal for said request;
• upon determining that implementing said new volume level would produce an output that would exceed said quality threshold
• producing a first output volume signal through said digital signal processor using a first set of adjustment parameters as said set of parameters and said new volume level;
• and
• upon determining that implementing said new volume level would produce an output that would not exceed said quality threshold
• producing a second output volume signal through said digital signal processor using a second set of adjustment parameters as said set of parameters and said new volume level;
• and
• a second module to convert said digitized audio signal to an analog audio signal and to provide said analog audio signal to a speaker,
• wherein said first output signal and said second output volume signal both implement said change of volume.

A circuit for adjusting an output audio signal of a communication device in compliance with a quality threshold, said circuit comprising:

• a module for receiving a signal encoding an audio signal and converting said signal to a digitized signal;
• a module to accept a request for an increase in a current volume setting to an increased volume level for said output audio signal;
• a microprocessor provided with instructions to detect when said request for said increase occurs and to generate an adjusted version of said digitized signal to implement said increased volume level utilizing a digital signal processor (DSP) a filter and said digitized signal;
• and
• a module to convert said adjusted version of the digitized signal to an analog audio signal and to provide said analog audio signal to a speaker,
• wherein the circuit
• determines if said request for said increase at said increased volume level would generate an audio output signal that exceeds said quality threshold;
• upon determining that said increased volume is within said quality threshold, selects a first set of adjustment parameters to be used by said digital signal processor to generate an adjusted version of said digitized signal to implement said increased volume having a received loudness rating (RLR) level;
• and
• upon determining that said increased volume would cause said output audio signal to exceed said quality threshold, selects a second set of adjustment parameters to be used by said digital signal processor to generate another adjusted version of said digitized signal that provides different output levels for said digitized signal at different frequencies as compared to said adjusted version to have an acceptable characteristic for said quality threshold while implementing said increased volume at about said RLR level.