One can model the phonocardiogram signal as a four state HMM. The first state corresponds to the S1 sound, the second state corresponds to the silence during the systolic period, the third state corresponds to the S2 sound, and the fourth state corresponds to the silence during the diastolic period (see Figure 1). This model ignores the possibility of the S3 and S4 heart sounds, because these heart sounds are not germane to the task of recognizing respiration rates from heart sound data.
Additionally, these sounds are difficult to hear and record; therefore, they are most likely not noticeable in our heart sound data.
One can model the phonocardiogram signal as a four state HMM. The first state corresponds to the S1 sound, the second state corresponds to the silence during the systolic period, the third state corresponds to the S2 sound, and the fourth state corresponds to the silence during the diastolic period (see Figure 1). This model ignores the possibility of the S3 and S4 heart sounds, because these heart sounds are not germane to the task of recognizing respiration rates from heart sound data.Additionally, these sounds are difficult to hear and record; therefore, they are most likely not noticeable in our heart sound data.
การแปล กรุณารอสักครู่..