Patent ID: 11887607
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 6:
7. The method according to claim 1, wherein the performing differential encoding on a first pitch period of the first secondary channel signal using an estimated pitch period value of the first primary channel signal comprises:
performing secondary channel closed-loop pitch period search based on the estimated pitch period value of the first primary channel signal, to obtain an estimated pitch period value of the first secondary channel signal;
determining an upper limit of the pitch period index value of the first secondary channel signal based on a pitch period search range adjustment factor of the first secondary channel signal; and
calculating the pitch period index value of the first secondary channel signal based on the estimated pitch period value of the first primary channel signal, the estimated pitch period value of the first secondary channel signal, and the upper limit of the pitch period index value of the first secondary channel signal.