Computer-implemented bass enhancement method and bass enhancement apparatus

1 . A computer-implemented bass enhancement method comprising:

extracting, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generating, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

generating, from the low frequency signal and the input audio signal, a bass-range enhancement signal that enhances bass-range frequencies of the input audio signal,

wherein the input audio signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the extracting of the inharmonic sound signal from the input audio signal includes:

generating, from the input audio signal, a bass signal where the high frequency components of the input audio signal have been reduced; and

extracting the inharmonic sound signal from the bass signal.

2 . The bass enhancement method according to claim 1 , wherein the inharmonic sound components include percussive sound components.

3 . The bass enhancement method according to claim 1 , wherein the generating of the bass-range enhancement signal includes:

generating a delayed audio signal by delaying the input audio signal for a time period required to generate the low frequency signal from the input audio signal; and

generating the bass-range enhancement signal by adding the delayed audio signal to the low frequency signal.

4 . A computer-implemented bass enhancement method comprising:

extracting, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generating, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

generating, from the low frequency signal and the input audio signal, a bass-range enhancement signal that enhances bass-range frequencies of the input audio signal,

wherein the inharmonic sound signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the generating of the low frequency signal from the inharmonic sound signal includes:

generating, from the inharmonic sound signal, a bass signal where the high frequency components of the inharmonic sound signal have been reduced; and

generating the low frequency signal from the bass signal.

5 . The bass enhancement method according to claim 4 , wherein the inharmonic sound components include percussive sound components.

6 . The bass enhancement method according to claim 4 , wherein the generating of the bass-range enhancement signal includes:

generating a delayed audio signal by delaying the input audio signal for a time period required to generate the low frequency signal from the input audio signal; and

generating the bass-range enhancement signal by adding the delayed audio signal to the low frequency signal.

7 . A bass enhancement apparatus comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

extract, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generate, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

generate, from the low frequency signal and the input audio signal, a bass-range enhancement signal that enhances bass-range frequencies of the input audio signal,

wherein the input audio signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the at least one processor, in extracting the inharmonic sound signal from the input audio signal:

generates, from the input audio signal, a bass signal where the high frequency components of the input audio signal have been reduced; and

extracts the inharmonic sound signal from the bass signal.

8 . A bass enhancement apparatus comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

extract, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generate, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

provide an output audio signal including at least the low frequency signal to an actuator configured to vibrate a seat,

wherein the input audio signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the at least one processor, in extracting the inharmonic sound signal from the input audio signal:

generates, from the input audio signal, a bass signal where the high frequency components of the input audio signal have been reduced; and

extracts the inharmonic sound signal from the bass signal.

9 . A bass enhancement apparatus comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

extract, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generate, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

generate, from the low frequency signal and the input audio signal, a bass-range enhancement signal that enhances bass-range frequencies of the input audio signal,

wherein the inharmonic sound signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the at least one processor, in generating the low frequency signal from the inharmonic sound signal:

generates, from the inharmonic sound signal, a bass signal where the high frequency components of the inharmonic sound signal have been reduced; and

generates the low frequency signal from the bass signal.

10 . A bass enhancement apparatus comprising:

at least one memory storing instructions; and

at least one processor configured to execute the instructions to:

extract, from an input audio signal including harmonic sound components and inharmonic sound components, an inharmonic sound signal representing the inharmonic sound components, which are other than the harmonic sound components;

generate, from the inharmonic sound signal, a low frequency signal with a frequency that is one N-th a frequency of a fundamental wave component of the inharmonic sound signal, where N is an integer greater than one; and

provide an output audio signal including at least the low frequency signal to an actuator configured to vibrate a seat,

wherein the inharmonic sound signal includes high frequency components including frequencies that are higher than a frequency band of the inharmonic sound components, and

wherein the at least one processor, in generating the low frequency signal from the inharmonic sound signal:

generates, from the inharmonic sound signal, a bass signal where the high frequency components of the inharmonic sound signal have been reduced; and

generates the low frequency signal from the bass signal.