ELECTROCARDIOGRAM SIGNAL COMPRESSION AND DE-COMPRESSION SYSTEM

Sheau-Fang Lei (Inventor)

Research output: Patent

Abstract

The invention provides an electrocardiogram signal compression and de-compression system. The invention uses the sign characteristics of the coefficients of the discrete cosine transform type IV and the characteristics of quantization of spectrum to perform the differential pulse code modulation of the spectrum for preserving the high frequency characteristics of the spectrum of the discrete Fourier transform. The invention also uses the Huffman coding to increase the compression ratio. Different from the conventional compression technology, the invention uses the fact that the quantization values of the spectrum in the high frequency are almost the same to increase the compression ratio and preserve the characteristics of high frequency components of the spectrum.
Original languageEnglish
Patent number8917779
Publication statusPublished - 2013 Sep 19

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Patents and inventions
Electrocardiography
Differential pulse code modulation
Discrete cosine transforms
Discrete Fourier transforms

Cite this

Lei, Sheau-Fang (Inventor). / ELECTROCARDIOGRAM SIGNAL COMPRESSION AND DE-COMPRESSION SYSTEM. Patent No.: 8917779.
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ELECTROCARDIOGRAM SIGNAL COMPRESSION AND DE-COMPRESSION SYSTEM. / Lei, Sheau-Fang (Inventor).

Patent No.: 8917779.

Research output: Patent

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AB - The invention provides an electrocardiogram signal compression and de-compression system. The invention uses the sign characteristics of the coefficients of the discrete cosine transform type IV and the characteristics of quantization of spectrum to perform the differential pulse code modulation of the spectrum for preserving the high frequency characteristics of the spectrum of the discrete Fourier transform. The invention also uses the Huffman coding to increase the compression ratio. Different from the conventional compression technology, the invention uses the fact that the quantization values of the spectrum in the high frequency are almost the same to increase the compression ratio and preserve the characteristics of high frequency components of the spectrum.

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Lei S-F, inventor. ELECTROCARDIOGRAM SIGNAL COMPRESSION AND DE-COMPRESSION SYSTEM. 8917779. 2013 Sep 19.