Design and Development of Digital Signal Processor Based Phonocardiogram System

This paper presents a real-time and cost effective system for the heart auscultation monitoring and hearing. The system design comprises of a Phonocardiographic pre-amplifier circuit with a TMS320C6711 Digital Signal Processor Starter kit (DSK) and its associated software. The Phonocardiogram signal from the pre-amplifier circuit is acquired through the CODEC input of the DSK and subjected to various signal processing techniques. Frequency analysis and component analysis are performed to identify the normal and pathological heart sound patterns using Short Time Fourier Transform (STFT) and Wavelet transform techniques respectively. To study the performance of the system, the analysis of heart sound patterns for various diseases were conducted. Finally the computational efficiency of the system was calculated by comparing the execution time of the algorithms in the proposed DSPPCG (Digital Signal Processor based Phonocardiogram) system with the PCPCG (PC based Phonocardiogram) system.

[1]  L. Senhadji,et al.  Time-frequency scaling transformation of the phonocardiogram based of the matching pursuit method , 1998, IEEE Transactions on Biomedical Engineering.

[2]  Bhawna Nigam,et al.  Document Classification Using Expectation Maximization with Semi Supervised Learning , 2011, ArXiv.

[3]  Vladimir Kudriavtsev,et al.  Heart energy signature spectrogram for cardiovascular diagnosis , 2007, Biomedical engineering online.

[4]  P. Erne,et al.  Beyond auscultation--acoustic cardiography in the diagnosis and assessment of cardiac disease. , 2008, Swiss medical weekly.

[5]  William Thornton,et al.  Auscultation of the Heart , 2002 .

[6]  R. L. Tutwiler,et al.  The perception of postural instability as revealed by Morlet wavelet transform in EEG , 1998, Proceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis (Cat. No.98TH8380).

[7]  Faizan Javed,et al.  A Signal Processing Module for the Analysis of Heart Sounds and Heart Murmurs , 2006 .

[8]  John G. Webster,et al.  Medical Instrumentation: Application and Design , 1997 .

[9]  R M Rangayyan,et al.  Phonocardiogram signal analysis: a review. , 1987, Critical reviews in biomedical engineering.

[10]  E. Kail,et al.  Internet digital phonocardiography in clinical settings and in population screening , 2004, Computers in Cardiology, 2004.

[11]  R. Doraiswami,et al.  Unsupervised and Uncued Segmentation of the Fundamental Heart Sounds in Phonocardiograms Using a Time-Scale Representation , 2006, 2006 International Conference of the IEEE Engineering in Medicine and Biology Society.

[12]  Debbal S.M. Amin,et al.  Features for Heartbeat Sound Signal Normal and Pathological , 2008 .