Patent ID: 9741352
Date: 2017-08-22
CPC Classifications: G10L

Claim:
1. An audio signal processing method comprising: receiving an audio signal including a super wide band; obtaining a frequency-converted coefficient corresponding to the super wide band by performing frequency conversion with respect to the audio signal; generating a harmonic ratio based on the frequency-converted coefficient corresponding to the super wide band; obtaining a harmonic number based on the harmonic ratio, the harmonic number indicating a number of the super wide band which have harmonic characteristics; determining whether a current frame is a harmonic mode based on the harmonic number; quantizing the frequency-converted coefficient corresponding to the super wide band based on the harmonic mode; generating target vectors using maximum pulses and the frequency-converted coefficient corresponding to the super wide band; vector-quantizing the target vector and positions of the maximum pulses; quantizing the positions the maximum pulses; and transmitting the audio signal including the quantized frequency-converted coefficient corresponding to the super wide band, mode information indicating the current frame is the harmonic mode and the quantized target vector and the quantized positions of the maximum pulses to decoder.