US Patent No. 10,321,254

AUDIO SIGNAL PROCESSING METHOD AND APPARATUS


Patent No. 10,321,254
Issue Date June 11, 2019
Title Audio Signal Processing Method And Apparatus
Inventorship Hyunoh Oh, Gyeonggi-do (KR)
Taegyu Lee, Gyeonggi-do (KR)
Jinsam Kwak, Gyeonggi-do (KR)
Juhyung Son, Gyeonggi-do (KR)
Assignee WILUS INSTITUTE OF STANDARDS AND TECHNOLOGY INC., Gyeonggi-Do (KR)

Claim of US Patent No. 10,321,254

1. A method for processing an audio signal, comprising:receiving an audio signal of a first channel, wherein the first channel is classified into a first channel group, and the audio signal of the first channel includes a plurality of subband signals;
receiving an audio signal of a second channel, wherein the second channel is classified into a second channel group, and the audio signal of the second channel includes a plurality of subband signals;
filtering each subband signal of the first channel by using each set of subband filter coefficients generated from a first set of filter coefficients, wherein the first set of filter coefficients corresponds to a position related to the first channel in a virtual reproduction space;
filtering each subband signal of the second channel by using each set of subband filter coefficients generated from a second set of filter coefficients, wherein the second set of filter coefficients corresponds to a position related to the second channel in the virtual reproduction space; and
generating an output audio signal by mixing the filtered subband signals of the first channel and the filtered subband signals of the second channel;
wherein a length of the set of subband filter coefficients is determined based on a filter order for each subband and for each channel group, and the filter order is variable for each subband and for each channel group.