Patent №
US 8,917,779
Granted
2014-12-23
Filed 2013
Owner
NATIONAL CHENG KUNG UNIVERSITY
Lab
—
AI components
1
vision
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
13795845
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.
AI classification
Ownership
NATIONAL CHENG KUNG UNIVERSITY
assignment · 304220931
Assignors
LEI, SHEAU-FANG, LAI, SHIN-CHI, LAN, CHIEN-SHENG
On an employer assignment, the assignors are typically the inventors.