System and method for digital signal processing
First Claim
1. A method for processing a digital signal comprising:
- adjusting a gain of the digital signal a first time using a digital processing device to create a first adjusted signal;
processing the first adjusted signal with a first low shelf filter and a first high shelf filter to create a first filtered signal;
compressing the first filtered signal with a first compressor to create a first compressed signal;
processing the first compressed signal with a second low shelf filter and a second high shelf filter to create a second filtered signal;
processing the second filtered signal with a graphic equalizer to create an equalized signal;
compressing the equalized signal with a second compressor to create a second compressed signal;
adjusting the gain of the second compressed signal a second time to create a second adjusted signal, wherein the adjustment comprises a gain reduction if the gain of the second compressed signal is above a predetermined threshold; and
outputting the second adjusted signal through an amplifier and driver circuit in a personal audio listening device.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides methods and systems for digitally processing audio signals. Some embodiments receive an audio signal and converting it to a digital signal. The gain of the digital signal may be adjusted a first time, using a digital processing device located between a receiver and a driver circuit. The adjusted signal can be filtered with a first low shelf filter. The systems and methods may compress the filtered signal with a first compressor, process the signal with a graphic equalizer, and compress the processed signal with a second compressor. The gain of the compressed signal can be adjusted a second time. These may be done using the digital processing device. The signal may then be output through an amplifier and driver circuit to drive a personal audio listening device. In some embodiments, the systems and methods described herein may be part of the personal audio listening device.
320 Citations
17 Claims
-
1. A method for processing a digital signal comprising:
-
adjusting a gain of the digital signal a first time using a digital processing device to create a first adjusted signal; processing the first adjusted signal with a first low shelf filter and a first high shelf filter to create a first filtered signal; compressing the first filtered signal with a first compressor to create a first compressed signal; processing the first compressed signal with a second low shelf filter and a second high shelf filter to create a second filtered signal; processing the second filtered signal with a graphic equalizer to create an equalized signal; compressing the equalized signal with a second compressor to create a second compressed signal; adjusting the gain of the second compressed signal a second time to create a second adjusted signal, wherein the adjustment comprises a gain reduction if the gain of the second compressed signal is above a predetermined threshold; and outputting the second adjusted signal through an amplifier and driver circuit in a personal audio listening device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification