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

Claim 19:
20. The apparatus according to claim 17, wherein the programming instructions for execution by the at least one processor, when executed by the at least one processor cause the encoding apparatus further to:
determine a closed-loop pitch period integer part loc_T0 of the first secondary channel signal and a closed-loop pitch period fractional part loc_frac_prim of the first secondary channel signal based on the estimated pitch period value of the first primary channel signal; and
calculate the pitch period index value soft_reuse_index of the first secondary channel signal in the following manner:

soft_reuse_index=(N*pitch_soft_reuse+pitch_frac_soft_reuse)−(N*loc_T0+loc_frac_prim)+soft_reuse_index_high_limit/M; wherein

pitch_soft_reuse represents an integer part of the estimated pitch period value of the first secondary channel signal, pitch_frac_soft_reuse represents a fractional part of the estimated pitch period value of the first secondary channel signal, soft_reuse_index_high_limit represents the upper limit of the pitch period index value of the first secondary channel signal, N represents a quantity of subframes of the first secondary channel signal, M represents an adjustment factor of the upper limit of the pitch period index value of the first secondary channel signal, M is a non-zero real number, * represents a multiplication operator, + represents an addition operator, and − represents a subtraction operator.