LOUDSPEAKER-ROOM EQUALIZATION WITH PERCEPTUAL CORRECTION OF SPECTRAL DIPS
First Claim
1. A method for generating a perceptual equalization (EQ) filter which is applicable to an audio signal to equalize the audio signal, said method including steps of:
- generating data indicative of a full equalization (EQ) filter for use in performing full equalization on the audio signal; and
modifying the frequency-amplitude spectrum of the full EQ filter in accordance with a dip detection threshold function, D(fc, Q), thereby determining the perceptual EQ filter in response to the full EQ filter, and generating data indicative of the perceptual EQ filter, where the dip detection threshold function, D(fc, Q), is indicative of minimum perceivable amplitude of each of at least a number of different dips in the frequency-amplitude spectrum of an acoustic signal as perceived by at least one listener, where each of the dips has center frequency, fc, and quality factor, Q.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for generating a perceptual equalization (EQ) filter applicable to an audio signal to equalize the audio signal, including: generating a full EQ filter for use in performing full equalization on the signal; and modifying the frequency-amplitude spectrum of the full EQ filter in accordance with a dip detection threshold function, thereby generating the perceptual EQ filter, where the dip detection threshold function is indicative of minimum perceivable amplitude of each of at least a number of different dips in the frequency-amplitude spectrum of an acoustic signal. Also, a method for equalizing an audio signal, including: generating a full EQ filter for use in performing full equalization on the signal, modifying the frequency-amplitude spectrum of the full EQ filter in accordance with at least one dip detection threshold value, thereby generating a perceptual EQ filter, and applying the perceptual EQ filter to perceptually equalize the signal.
-
Citations
41 Claims
-
1. A method for generating a perceptual equalization (EQ) filter which is applicable to an audio signal to equalize the audio signal, said method including steps of:
-
generating data indicative of a full equalization (EQ) filter for use in performing full equalization on the audio signal; and modifying the frequency-amplitude spectrum of the full EQ filter in accordance with a dip detection threshold function, D(fc, Q), thereby determining the perceptual EQ filter in response to the full EQ filter, and generating data indicative of the perceptual EQ filter, where the dip detection threshold function, D(fc, Q), is indicative of minimum perceivable amplitude of each of at least a number of different dips in the frequency-amplitude spectrum of an acoustic signal as perceived by at least one listener, where each of the dips has center frequency, fc, and quality factor, Q. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A method for equalizing an audio signal, including steps of:
-
(a) generating a full equalization (EQ) filter for use in performing full equalization on the audio signal, and modifying the frequency-amplitude spectrum of the full EQ filter in accordance with at least one dip detection threshold value, thereby generating a perceptual EQ filter in response to the full EQ filter, where each said dip detection threshold value is indicative of minimum perceivable amplitude of a different dip in the frequency-amplitude spectrum of an acoustic signal as perceived by at least one listener, where each said dip has a center frequency, fc, and a quality factor, Q; and (b) applying the perceptual EQ filter to the audio signal to perceptually equalize said audio signal, thereby generating an equalized audio signal. - View Dependent Claims (17, 18, 19, 20, 21, 22)
-
-
23. A system for determining a perceptual equalization (EQ) filter which is applicable to an audio signal to equalize the audio signal, said system including:
-
a memory, which stores data indicative of a dip detection threshold function, D(fc, Q), where the dip detection threshold function, D(fc, Q), is indicative of minimum perceivable amplitude of each of at least a number of different dips in the frequency-amplitude spectrum of an acoustic signal as perceived by at least one listener, where each of the dips has center frequency, fc, and quality factor, Q; and a processing subsystem coupled and configured to access data indicative of a full equalization (EQ) filter for use in performing full equalization on the audio signal, to access the data indicative of the dip detection threshold function, D(fc, Q), to modify the frequency-amplitude spectrum of the full EQ filter in accordance with the dip detection threshold function, D(fc, Q), thereby determining the perceptual EQ filter in response to the full EQ filter, and to generate data indicative of the perceptual EQ filter. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
-
-
34. A system for equalizing an audio signal, including:
-
a processing subsystem coupled and configured to access data indicative of a full equalization (EQ) filter for use in performing full equalization on the audio signal, to access data indicative of at least one dip detection threshold value, and to modify the frequency-amplitude spectrum of the full EQ filter in accordance with said at least one dip detection threshold value, thereby generating a perceptual EQ filter in response to the full EQ filter, where each said dip detection threshold value is indicative of minimum perceivable amplitude of a different dip in the frequency-amplitude spectrum of an acoustic signal as perceived by at least one listener, where each said dip has a center frequency, fc, and a quality factor, Q; and an equalization subsystem coupled and configured to apply the perceptual EQ filter to the audio signal to perceptually equalize said audio signal, thereby generating an equalized audio signal. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41)
-
Specification