Patent ID: 11950079
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 14:
15. The audio coding device of claim 14, wherein the adaptive window function of the current frame is determined based on a smoothed inter-channel time difference of the at least one past frame, wherein when updating the buffered weighting coefficient of the at least one past frame, the programming instructions for execution by the at least one processor cause the audio coding device further to:
calculate a first weighting coefficient of the current frame based on a smoothed inter-channel time difference estimation deviation of the current frame; and
update a buffered first weighting coefficient of the at least one past frame based on the first weighting coefficient of the current frame, wherein the first weighting coefficient of the current frame is calculated using formulas comprising:

wgt_par1=a_wgt1*smooth_dist_reg_update+b_wgt1;

a_wgt1=(xl_wgt1−xh_wgt1)/(yh_dist1′−yl_dist1′); and

b_wgt1=xl_wgt1−a_wgt1*yh_dist1′,

wherein wgt_par 1 is the first weighting coefficient of the current frame, wherein smooth_dist_reg_update is the smoothed inter-channel time difference estimation deviation of the current frame, wherein xh_wgt is an upper limit value of the first weighting coefficient, wherein xl_wgt is a lower limit value of the first weighting coefficient, wherein yh_dist1′ is a first smoothed inter-channel time difference estimation deviation corresponding to the upper limit value of the first weighting coefficient, wherein yl_dist1′ is a second smoothed inter-channel time difference estimation deviation corresponding to the lower limit value of the first weighting coefficient, and wherein yh_dist1′, yl_dist1′, xh_wgt1, and xl_wgt1 are all positive numbers.