Model training device for command word recognition model, command word recognition device and command word recognition method

The invention provides a command word recognition model training device, a command word recognition device and a command word recognition method, and relates to the technical field of voice recognition, the model training device comprises a sample acquisition module used for acquiring a voice command word sample set with a label, the sample set comprises first voice sample data, and the first voice sample data is used for acquiring first voice command word data; the sample data comprises positive sample voice frames and negative sample voice frames; the model training module is used for training an initial training model based on the sample set to obtain a command word recognition model; in the training process, calculating loss based on all negative sample voice frames in the sample data and a frame of target positive sample voice frame; the target positive sample voice frame is a positive sample voice frame corresponding to the target probability in all positive sample voice frames in the sample data; the t