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

Claim 2:
3. The delay estimation method of claim 2, wherein the buffered inter-channel time difference information of the at least one past frame is the inter-channel time difference smoothed value of the at least one past frame, wherein updating the buffered inter-channel time difference information of the at least one past frame comprises:
determining a second inter-channel time difference smoothed value of the current frame based on the delay track estimation value of the current frame and the inter-channel time difference of the current frame; and
updating a buffered inter-channel time difference smoothed value of the at least one past frame based on the second inter-channel time difference smoothed value of the current frame, wherein the second inter-channel time difference smoothed value of the current frame is calculated using a formula comprising:

cur_itd_smooth=φ*reg_prv_corr+(1−φ)*cur_itd,

wherein cur_itd_smooth is the second inter-channel time difference smoothed value of the current frame, wherein φ is a second smoothing factor comprising a constant greater than or equal to 0 and less than or equal to 1, wherein reg_prv_corr is the delay track estimation value of the current frame, and wherein cur_itd is the inter-channel time difference of the current frame.