Signal classification processing method, classification processing device, and encoding system

A classification processing device, comprising:

• a receiving unit, configured to obtain a high band input signal;
• a processing unit, configured to determine a signal type of the obtained high band input signal according to a time domain characteristic parameter of the high band input signal, and determine an encoding mode corresponding to the signal type;
• wherein
• the high band input signal obtained by the receiving unit 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 processing unit comprises:
• a first parameter unit, configured to determine 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;
• a first determination unit, configured to determine 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,
• determine 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 a total envelope threshold, determine that the current frame of the high band input signal is of the transient type;
• and
• a first encoding mode unit, configured to determine that the current frame determined as the transient type corresponds to a transient type encoding mode.

An encoding system, comprising:

• a classification processing device, configured to obtain a high band input signal, determine a signal type of the high band input signal according to a time domain characteristic parameter of the high band input signal, and determine an encoding mode corresponding to the signal type;
• and
• an encoding device, configured to encode the high band input signal according to the encoding mode determined by the classification processing device;
• wherein the classification processing device comprises a receiving unit and a processing unit,
• the high band input signal obtained by the receiving unit 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 processing unit comprises:
• a first parameter unit, configured to determine 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;
• a first determination unit, configured to determine 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 determine 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, determine that the current frame of the high band input signal is of the transient type;
• and
• a first encoding mode unit, configured to determine that the current frame determined as the transient type corresponds to a transient type encoding mode.