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

Claim 0:
1. A delay estimation method, comprising:
determining a cross-correlation coefficient of a multi-channel signal of a current frame;
determining a delay track estimation value of the current frame based on buffered inter-channel time difference information of at least one past frame; wherein determining the delay track estimation value of the current frame comprises: performing delay track estimation based on the buffered inter-channel time difference information of the at least one past frame; and using a linear regression method to determine the delay track estimation value of the current frame; or wherein determining the delay track estimation value of the current frame comprises: performing delay track estimation based on the buffered inter-channel time difference information of the at least one past frame; and using a weighted linear regression method to determine the delay track estimation value of the current frame;
determining an adaptive parameter of an adaptive window function of the current frame based on a coding parameter of the at least one past frame, wherein the coding parameter indicates a first type of the at least one past frame or a second type of the at least one past frame on which time-domain downmixing processing is performed;
determining the adaptive window function of the current frame according to the adaptive parameter;
performing weighting on the cross-correlation coefficient, based on the delay track estimation value and the adaptive window function, to obtain a weighted cross-correlation coefficient; and
determining an inter-channel time difference of the current frame based on the weighted cross-correlation coefficient.