Method for amplifying audio signal based on its amplitude and electronic device supporting the same

An electronic device comprising a processor, wherein the processor is configured to:

• filter an audio signal obtained from an external source into a first frequency band signal and a second frequency band signal by using a filter, and for each of the first frequency band signal and second frequency band signal:
• examine a sound level of a frequency band signal for a preset time;
• check if a frequency with which the examined sound level becomes higher than or equal to a specified level satisfies a preset condition;
• change, if the frequency with which the examined sound level becomes higher than or equal to the specified level satisfies the preset condition, a reference level at which a gain value for audio signal amplification is changed in accordance with an amplitude change of the frequency band signal, for at least one section of the frequency band signal satisfying the preset condition;
• and
• amplify the at least one section of the frequency band signal according to the changed reference level.

An electronic device comprising a processor wherein the processor is configured to:

• examine a sound level of an audio signal obtained from an external source for a preset time and check if the examined sound level meets a first specified level or a second specified level;
• amplify, if the examined sound level meets the first specified level, a section of the audio signal whose sound level corresponds to the first specified level at a first specified gain;
• change, if the examined sound level meets the second specified level, a reference level for a transition from the first specified gain to a second specified gain less than the first specified gain for the section of the audio signal where the sound level corresponds to the second specified level, and
• amplify at least a portion of the audio signal that meets the changed reference level of the section corresponding to the second specified level at the second specified gain.

An electronic device comprising a processor, wherein the processor is configured to:

• filter an audio signal obtained from an external source into a first frequency band signal and a second frequency band signal by using a filter;
• for each of the first frequency band signal and the second frequency band signal:
• examine a sound level of a frequency band signal for a preset time and check if the examined sound level meets a first specified level or a second specified level;
• amplify, if the examined sound level meets the first specified level, a section of the frequency band signal whose sound level corresponds to the first specified level at a first specified gain;
• change, if the examined sound level meets the second specified level, a reference level for a transition from the first specified gain to a second specified gain less than the first specified gain for the section of the frequency band signal where the sound level corresponds to the second specified level;
• and
• amplify at least a portion of the frequency band signal that meets the changed reference level of the section corresponding to the second specified level at the second specified gain;
• and
• mix the amplified first frequency band signal and the amplified second frequency band signal together to generate an amplified audio signal of an overall frequency band.

A method of audio signal processing for an electronic device, the method comprising:

• examining a sound level of an audio signal obtained from an external source for a preset time and checking if a frequency with which the examined sound level becomes higher than or equal to a specified level satisfies a preset condition;
• changing, if the frequency with which the examined sound level becomes higher than or equal to the specified level satisfies the preset condition, a reference level for a transition from a first specified gain to a second specified gain, for a section of the audio signal whose sound level corresponds to the specified level;
• and
• amplifying at least a portion of the audio signal that meets the changed reference level of the section corresponding to the specified level at the second specified gain.

A method of audio signal processing for an electronic device, the method comprising:

• filtering an obtained audio signal into a first frequency band signal and a second frequency band signal by using a filter prior to examining;
• and
• for each of the first frequency band signal and the second frequency band signal:
• examining a sound level of the frequency band signal for a preset time and checking if a frequency with which the examined sound level becomes higher than or equal to a specified level satisfies a preset condition;
• changing, if the frequency with which the examined sound level becomes higher than or equal to the specified level satisfies the preset condition, a reference level for a transition from a first specified gain to a second specified gain, for a section of the frequency band signal whose sound level corresponds to the specified level;
• and
• amplifying at least a portion of the frequency band signal that meets the changed reference level of the section corresponding to the specified level at the second specified gain.