US Patent No. 9,832,589

METHOD FOR GENERATING FILTER FOR AUDIO SIGNAL, AND PARAMETERIZATION DEVICE FOR SAME


Patent No. 9,832,589
Issue Date November 28, 2017
Title Method For Generating Filter For Audio Signal, And Parameterization Device For Same
Inventorship Taegyu Lee, Gyeonggi-do (KR)
Hyunoh Oh, Gyeonggi-do (KR)
Assignee Wilus Institute Of Standards And Technology Inc., Seoul (KR)

Claim of US Patent No. 9,832,589

1. A method for generating a filter for an audio signal, comprising:
receiving at least one binaural room impulse response (BRIR) filter coefficients for binaural filtering of an input audio
signal;

converting the BRIR filter coefficients into a plurality of subband filter coefficients;
obtaining average reverberation time information of a corresponding subband by using reverberation time information extracted
from the subband filter coefficients;

obtaining at least one coefficient for curve fitting of the obtained average reverberation time information;
obtaining flag information indicating whether the length of the BRIR filter coefficients in a time domain is more than a predetermined
value;

obtaining filter order information for determining a truncation length of the subband filter coefficients, the filter order
information being obtained by using the average reverberation time information or the at least one coefficient according to
the obtained flag information, and the filter order information of at least one subband being different from filter order
information of another subband; and

truncating the subband filter coefficients by using the obtained filter order information.