System and method for bass enhancement
AssigneeActiwave AB
InventorPär Gunnars Risberg
Life of this patent
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Abstract
A system and method for enhancing the real and/or perceived bass band of an audio signal is disclosed. A computationally simple yet effective bass band enhancement system for use in consumer electronics applications is disclosed. An audio processing system including bass enhancement functionality for use in a mobile audio system is disclosed.
Claims25
A bass enhancement system for producing an enhanced output signal from an input signal comprising:
- a compressor configured to accept the input signal or a signal derived therefrom, the compressor including a compressor function to produce a first enhanced signal related to the input signal, and compressor further including a control algorithm to produce an internal control signal related to one or more parameters of the input signal, wherein the internal control signal takes a form of a loudspeaker excursion estimation;
- a psychoacoustic bass enhancement block (PAB) configured to accept the internal control signal and the input signal or a signal derived therefrom, the PAB including a PAB function to produce a second enhanced signal dependent on the input signal and the internal control signal;
- and
- a combination block for mixing the first enhanced signal and the second enhanced signal to form the enhanced output signal.
A method for producing an enhanced output signal with improved bass from an input signal comprising;
- compressing the input signal or a signal derived therefrom to form a first enhanced signal;
- generating one or more harmonics from the input signal or a signal derived therefrom to form at least a portion of a second enhanced signal;
- monitoring one or more parameters of the input signal or a signal derived therefrom to form a strength signal, wherein the strength signal takes a form of a loudspeaker excursion estimation;
- and
- mixing the first enhanced signal and the second enhanced signal in proportions dependent on the strength signal to form the enhanced output signal.
A method for bass enhancing an audio input signal to produce an enhanced output signal comprising;
- isolating one or more band signals from the audio input signal;
- amplifying one or more of the band signals with an adjustable gain parameter to form a first enhanced signal;
- applying a psychoacoustic audio enhancement algorithm to one or more band signals to form a second enhanced signal based upon a loudspeaker excursion estimation related to one or more parameters of the input signal;
- delaying one or more band signals to form a delayed signal;
- and
- mixing the delayed signal, the first enhanced signal and the second enhanced signal to produce the enhanced output signal.
Dependencies are inferred from the claim text.