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

Claim 9:
10. An audio coding device comprising:
at least one processor; and
one or more memories coupled to the at least one processor and configured to store programming instructions for execution by the at least one processor to cause the audio coding device to:
determine a cross-correlation coefficient of a multi-channel signal of a current frame;
determine a delay track estimation value of the current frame based on buffered inter-channel time difference information of at least one past frame; wherein when determining the delay track estimation value of the current frame, the programming instructions for execution by the at least one processor cause the audio coding device further to: perform delay track estimation based on the buffered inter-channel time difference information of the at least one past frame, and use a linear regression audio coding device to determine the delay track estimation value of the current frame; or perform delay track estimation based on the buffered inter-channel time difference information of the at least one past frame; and use a weighted linear regression audio coding device to determine the delay track estimation value of the current frame;
determine 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;
determine an adaptive window function of the current frame according to the adaptive parameter;
perform weighting on the cross-correlation coefficient, based on the delay track estimation value of the current frame and the adaptive window function of the current frame, to obtain a weighted cross-correlation coefficient; and
determine an inter-channel time difference of the current frame based on the weighted cross-correlation coefficient.