Patent ID: 8103515

Claim:
A signal classification processing method, performed by a classification processing device, the method comprising: obtaining a high band input signal, wherein the signal is an audio signal or a voice signal; determining a signal type of the obtained high band input signal according to a time domain characteristic parameter of the high band input signal, and determining an encoding mode corresponding to the signal type; wherein the high band input signal is a time domain signal and comprises a high band input signal of a current frame and a high band input signal of frames adjacent to the current frame; and the determining the signal type of the high band input signal according to the time domain characteristic parameter of the obtained high band input signal and determining the encoding mode corresponding to the signal type comprises: determining a maximum envelope deviation and a maximum consecutive-envelop step value according to envelope values of each of the current frame and the frames adjacent to the current frame; determining whether the maximum envelope deviation is greater than or equal to a maximum envelope deviation threshold, and whether the maximum consecutive-envelop step value is greater than or equal to a maximum consecutive-envelop step threshold, if it is determined that the maximum envelope deviation is greater than or equal to the maximum envelope deviation threshold and the maximum consecutive-envelop step value is greater than or equal to the maximum consecutive-envelop step threshold, determining whether a total envelope value determined by the envelope values of each of the current frame and the frames adjacent to the current frame is greater than or equal to a total envelope threshold, and if the total envelope value is greater than or equal to the total envelope threshold, determining that the current frame of the high band input signal is of the transient type; and determining that the current frame determined as the transient type corresponds to a transient type encoding mode.