首页>
外国专利>
AN INTEGRATED SYSTEM TO ACQUIRE AND PROCESS DIGITAL HEART SOUND SIGNAL FOR IDENTIFICATION OF VALVULAR HEART DISEASES WITH TRAINING, SELF-TEST, REPORT GENERATION AND DISPLAY FACILITIES
AN INTEGRATED SYSTEM TO ACQUIRE AND PROCESS DIGITAL HEART SOUND SIGNAL FOR IDENTIFICATION OF VALVULAR HEART DISEASES WITH TRAINING, SELF-TEST, REPORT GENERATION AND DISPLAY FACILITIES
Accordingly there is provided an integrated system adaptable for diagnosis of valvular heart diseases comprising a data acquisition subsystem to non-invasively capture heart sound from a subject"s body, record the sound signals, and generate digitally processed phonocardiogram signal; a data compression and decompression subsystem to receive the recorded PCG signal from the data acquisition subsystem for compression of the recorded PCG signals in a wavelet based decomposition means and further compression in an Adaptive Differential Pulse Code Modulation encoder to quantize a difference signal, the difference signal being the difference between a predicted signal value and the actual signal value, of the signal; and a data decompression unit for receiving the quantized value from the ADPCM to perform an inverse quantization and subtract the value from the predicted signal value, and produce a decoded signal; a recording and display subsystem for storing the compressed data from the ADPCM in a secured format (.hsa) for disallowing unauthorized access, and displaying the PCG data in online/offline mode including diagnosing and report generation; and a decision making subsystem having means for segmentation, feature extraction and classification of data received from the data compression and decompression subsystem and allowing display of the identification results on heart valve disease in the recording and display subsystem.
展开▼
