Patent ID: 9685165
Date: 2017-06-20
CPC Classifications: G10L

Claim:
1. A method for predicting a high band excitation signal, comprising: decoding a received low band bitstream, wherein a set of spectral frequency parameters are acquired via the decoding, wherein the set of spectral frequency parameters have an ordering relationship according to associated frequencies, wherein the spectral frequency parameters comprise low band line spectral frequency (LSF) parameters or low band immittance spectral frequency (ISF) parameters, and wherein a low band excitation signal is synthesized via the decoding; calculating spectral frequency parameter differences associated with at least two pairs of the spectral frequency parameters, wherein each pair of the spectral frequency parameters are related with a same ordering position interval according to the ordering relationship; determining, according to a frequency bin that corresponds to a minimum spectral frequency parameter difference, a start frequency bin for predicting a high band excitation signal from the low band excitation signal; and selecting, from the low band excitation signal, a frequency band with a preset bandwidth according to the start frequency bin, to generate the high band excitation signal.