Patent ID: 11869532
Assignee: nan
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A method for controlling an emergency bell based on sound, by an emergency bell control system using a sound-based emergency bell, the method comprising:
if an emergency bell operation signal is detected from an emergency bell device installed in a preset crime area, receiving sound information generated in the crime area;
classifying per-time key sound sources in the received sound information and providing a situation analysis result for whether a crime occurs using the classified per-time key sound sources;
providing on-site dispatch information or situation response information to a security terminal in charge of the crime area based on the situation analysis result; and
performing an artificial intelligence-based sound analysis algorithm that extracts an effective feature including a correlation in a time-frequency domain for the sound information having time series characteristics, classifies at least one key sound source based on the extracted effective feature using a convolutional neural network (CNN), and predicts the situation analysis result for the on-site situation using the classified key sound sources, wherein the artificial intelligence-based sound analysis algorithm further includes:
a data gathering step gathering a number of sample sound sources for each crime situation and stores them as a dataset for training;
a training step pre-processing the sample sound sources, extracting an auditory characteristic, as a feature vector, from the pre-processed data, and generating and training a classifier for classifying the key sound sources for each crime situation using the extracted feature vector;
a situation analysis step pre-processing the sound information received from the emergency bell device to extract the feature vector and classifying at least one key sound source using the trained classifier for the extracted feature vector; and
a prediction step predicting the situation analysis result for a crime situation derived based on the classified key sound sources, wherein the artificial intelligence-based sound analysis algorithm further includes a code classification step classifying the situation analysis result predicted by the prediction step into a crime code of a preset security level, setting a different dispatch time, responding personnel, and situation response behavior information depending on the classified crime code, and providing the on-site dispatch information or the situation response information.