Patent ID: 11900954
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 11:
12. The method according to claim 11, wherein filtering the excitation signal of the target voice frame comprises:
performing LTP filtering according to the excitation signal of the target voice frame, the LTP coefficient of any one subframe of the target voice frame, and the pitch lag of the any one subframe, to obtain an LTP filtering result of the any one subframe;
synthesizing an LTP filtering result of at least one subframe included in the daughter frames of the target voice frame, to obtain an LTP synthesis signal of the daughter frames;
performing interpolation according to the LSF of the kth daughter frame and the interpolation factor of the target voice frame, to obtain an LSF of a daughter frame different from the kth daughter frame;
determining an LPC coefficient of any one daughter frame according to an LSF of the any one daughter frame;
performing LPC filtering according to the excitation signal of the target voice frame, the LTP synthesis signal of the any one daughter frame, and the LPC coefficient of the any one daughter frame, to obtain any one reconstructed daughter frame; and
synthesizing the k reconstructed daughter frames to obtain the reconstructed target voice frame.