Abstract

In the last few years, data compression has become essential for both storage and transmission especially in the biomedical domain. In this paper, we propose a new technique for the electrocardiogram data compression. It is based on the singular value decomposition and a new adaptive vector quantization. In the proposed method, the codebook is generated adaptively at each quantization stage. The result of this procedure is a reduction of the codebook size. A residual encoding and a compensation of the residual reconstruction error technique are also proposed. Consequently, low reconstruction error was obtained. The technique was tested using arrhythmia database of the Massachusetts Institute of Technology-Beth Israel Hospital and compared to several existing methods. The obtained results were very satisfactory, since a compression ratio of 102.54 was reached for a low reconstruction error.

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