Audio recognition method and system and machine device

A neural network training system for implementing audio recognition, the audio recognition system comprising:

• a memory storing computer program instructions;
• and a processor coupled to the memory and configured to execute the computer program instructions to perform:
• obtaining an audio data stream for neural network training of audio recognition, the audio data stream including audio data respectively corresponding to a plurality of time frames;
• performing, for different audio data of each time frame in the audio data stream, feature extraction in each layer of a trained neural network, to obtain a depth feature outputted by a corresponding time frame;
• fusing, for a given label in labeling data, an inter-class confusion measurement index and an intra-class distance penalty value relative to the given label in a set loss function for the audio data stream through the depth feature;
• and
• obtaining, through fusion, a loss function value relative to a series of given labels in the labeling data, to update a parameter in the neural network.

A non-transitory computer-readable storage medium storing computer program instructions executable by at least one processor to perform:

• obtaining an audio data stream for neural network training of audio recognition, the audio data stream including audio data respectively corresponding to a plurality of time frames;
• performing, for different audio data of each time frame in the audio data stream, feature extraction in each layer of a trained neural network, to obtain a depth feature outputted by a corresponding time frame;
• fusing, for a given label in labeling data, an inter-class confusion measurement index and an intra-class distance penalty value relative to the given label in a set loss function for the audio data stream through the depth feature;
• and
• obtaining, through fusion, a loss function value relative to a series of given labels in the labeling data, to update a parameter in the neural network.