Audio enhancement
AssigneeCirrus Logic International Semiconductor Ltd.
InventorThomas Ivan HARVEY
Life of this patent
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Abstract
A signal processing module is configured to receive left and right channels of stereo input audio data and generate first and second channels of output audio data for first and second loudspeakers where the first and second loudspeakers have different frequency responses to one another. The signal processing module comprises an impulse emphasis block configured to emphasise impulsive sounds in the received audio in at least one of the first and second channels of output audio data.
Claims18
-20. (canceled)
An electronic device comprising:
- first and second loudspeakers;
- the first loudspeaker having a higher power rating and a greater response at lower frequencies than the second loudspeaker;
- a switching amplifier for driving said first loudspeaker;
- and
- a signal processing module configured to receive an input audio signal and generate first and second output audio channels for said first and second loudspeakers respectively;
- wherein the signal processing module is operable in a first mode and a second mode, wherein in the second mode the first output audio channel is limited so as to only comprise components of the input audio data below a filter cut-off frequency and in the first mode the first output audio channel may comprise at least some components of the input audio data above the cut-off frequency;
- and
- wherein a switching frequency of the switching amplifier is greater in the first mode than in the second mode.
A method of operation of an electronic device, wherein the electronic device comprises first and second loudspeakers and a switching amplifier for driving said first loudspeaker, wherein the first loudspeaker has a higher power rating and a greater response at lower frequencies than the second loudspeaker;
- the method comprising:
- receiving an input audio signal and generating first and second output audio channels for said first and second loudspeakers respectively;
- and
- allowing selection between a first mode or a second mode, wherein in the second mode the first output audio channel is limited so as to only comprise components of the input audio data below a filter cut-off frequency and in the first mode the first output audio channel may comprise at least some components of the input audio data above the cut-off frequency;
- and
- wherein a switching frequency of the switching amplifier is greater in the first mode than in the second mode.
Dependencies are inferred from the claim text.