System and method for reducing rub and buzz distortion
First Claim
Patent Images
1. An audio driver for a loudspeaker comprising:
- a digital processing module configured to generate a digital audio signal having a plurality of tracks;
a phase modification circuit coupled to the output of the digital processing module and configured to receive the digital audio signal and selectively shift a phase for each of the plurality of tracks to minimize peak displacement for the loudspeaker;
a digital to audio converter (DAC) operable to convert the phase modified digital audio signal supplied by the phase modification circuit to an analog audio signal; and
one or more analog driver stages operable to receive the analog audio signal supplied by the DAC and drive the loudspeaker;
wherein the phase modification circuit is further configured to add phase shifts to different frequency components of the audio signal to prevent peaks at each frequency from aligning.
8 Assignments
0 Petitions
Accused Products
Abstract
An audio driver with reduced rub and buzz distortion that includes a digital processing module. A digital to audio converter (DAC) operable to receive a digital audio signal supplied by the digital processing module. One or more analog driver stages operable to receive an analog audio signal supplied by the DAC. A peak amplitude compressor.
25 Citations
16 Claims
-
1. An audio driver for a loudspeaker comprising:
-
a digital processing module configured to generate a digital audio signal having a plurality of tracks; a phase modification circuit coupled to the output of the digital processing module and configured to receive the digital audio signal and selectively shift a phase for each of the plurality of tracks to minimize peak displacement for the loudspeaker; a digital to audio converter (DAC) operable to convert the phase modified digital audio signal supplied by the phase modification circuit to an analog audio signal; and one or more analog driver stages operable to receive the analog audio signal supplied by the DAC and drive the loudspeaker; wherein the phase modification circuit is further configured to add phase shifts to different frequency components of the audio signal to prevent peaks at each frequency from aligning. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for reducing rub and buzz distortion in a loudspeaker comprising:
-
subdividing an audio signal into a plurality of sinusoidal tracks; determining a phase, an amplitude and a frequency for each track; optimizing the phase of each track to minimize a peak displacement of the loudspeaker in accordance with a phase and magnitude response from a loudspeaker transfer function; selectively shifting a phase for each of the plurality of tracks to minimize peak displacement for the loudspeaker by inhibiting peaks at each frequency from aligning; and synthesizing an output audio signal based on the optimal phase, the amplitude and the frequency of one or more tracks. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A system comprising:
-
a loudspeaker having a corresponding loudspeaker transfer function; a digital processing module configured to generate a digital audio signal having a plurality of tracks; a phase modification circuit configured to receive the digital audio signal and selectively shift a phase for each of the plurality of tracks to minimize peak displacement for the loudspeaker in accordance with the loudspeaker transfer function by inhibiting peaks at each frequency from aligning; a digital to audio converter (DAC) operable to convert the phase modified digital audio signal supplied by the phase modification circuit to an analog audio signal; and one or more analog driver stages operable to receive the analog audio signal supplied by the DAC and drive the loudspeaker. - View Dependent Claims (12, 13, 14, 15, 16)
-
Specification