Equalizer controller and controlling method
Equalizer controller and controlling method are disclosed. In one embodiment, an equalizer controller includes an audio classifier for identifying the audio type of an audio signal in real time; and an adjusting unit for adjusting an equalizer in a continuous manner based on the confidence value of the audio type as identified.
1. An equalizer controlling method comprising:
classifying an audio signal so as to identify an audio type of the audio signal in real time; and
adjusting an equalizer in a continuous manner based on a confidence value of the audio type as identified, wherein the audio signal is classified into multiple audio types with corresponding confidence values, and the adjusting operation is configured to consider at least some of the multiple audio types through weighting the confidence values of the multiple audio types based on the importance of the multiple audio types.
2. An equalizer controlling method comprising:
classifying an audio signal so as to identify the audio type of the audio signal in real time; and
adjusting an equalizer in a continuous manner based on a confidence value of the audio type as identified, wherein the audio signal is classified into multiple audio types with corresponding confidence values, and the adjusting operation is configured to consider at least some of the multiple audio types through weighting the effects of the multiple audio types based on the confidence values.
3. The equalizer controlling method according to claim 2 , wherein the adjusting operation is configured to consider at least one dominant audio type based on the confidence values.
4. The equalizer controlling method according to claim 1 , further comprising, for a parameter of the equalizer adjusted by the adjusting operation, smoothing the parameter value determined by the adjusting operation at the present time based on the parameter values in the past.
5. The equalizer controlling method according to claim 4 , wherein the smoothing operation is configured to determine a smoothed parameter value at the present by calculating a weighted sum of the parameter value determined by the adjusting operation at the present time and a smoothed parameter value of the last time.
6. The equalizer controlling method according to claim 5 , wherein the weights for calculating the weighted sum are adaptively changed based on the audio type of the audio signal.
7. The equalizer controlling method according to claim 1 , wherein,
the operation of identifying the audio type comprises identifying the content type of the audio signal; and
the adjusting operation is configured to positively correlate an equalization level with a confidence value of short-term music, and/or negatively correlate the equalization level with a confidence value of speech.
8. The equalizer controlling method according to claim 1 , wherein,
the operation of identifying the audio type comprises identifying the context type of the audio signal; and
the adjusting operation is configured to positively correlate an equalization level with a confidence value of long-term music, and/or negatively correlate the equalization level with a confidence value of movie-like media and/or game.
9. The equalizer controlling method according to claim 1 , wherein,
the operation of identifying the audio type comprises identifying the content type of the audio signal; and
the adjusting operation is configured to positively correlate an equalization level with a confidence value of short-term music without dominant sources, and/or negatively correlate the equalization level with a confidence value of short-term music with dominant sources.
10. The equalizer controlling method according to claim 9 , wherein the adjusting operation is configured to positively correlate the equalization level with a confidence value of short-term music without dominant sources, and/or negatively correlate the equalization level with a confidence value of short-term music with dominant sources.
11. The equalizer controlling method according to claim 2 , wherein the adjusting operation is configured to consider the short-term music without/with dominant sources when the confidence value for the short-term music is greater than a threshold.
12. The equalizer controlling method according to claim 1 , wherein the operation of identifying the audio type further comprises:
identifying the content type of the audio signal; and
adjusting positively a correlated equalization level with a confidence value of background sound, and/or a negatively correlated equalization level with a confidence value of noise.
13. The equalizer controlling method according to claim 2 , wherein the adjusting operation is configured to assign an equalization level and/or equalization profile and/or spectral balance preset to each audio type.
14. The equalizer controlling method according to claim 1 , wherein the operation of identifying the audio type comprises classifying the audio signal into a long-term context type comprising at least one of movie-like media, long-term music, VoIP and game.
15. A non-transitory computer-readable medium with instructions stored thereon that when executed by one or more processors perform an equalizer controlling method comprising:
classifying an audio signal so as to identify an audio type of the audio signal in real time; and
adjusting an equalizer in a continuous manner based on a confidence value of the audio type as identified, wherein the audio signal is classified into multiple audio types with corresponding confidence values, and the adjusting operation is configured to consider at least some of the multiple audio types through weighting the confidence values of the multiple audio types based on the importance of the multiple audio types.