Basic investigation on compression of I/Q signals for ultrasonic diagnostic equipment

Citation
Y. Ohta et al., Basic investigation on compression of I/Q signals for ultrasonic diagnostic equipment, JPN J A P 1, 40(5B), 2001, pp. 3867-3871
Citations number
6
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
40
Issue
5B
Year of publication
2001
Pages
3867 - 3871
Database
ISI
SICI code
0021-4922(200105)40:5B<3867:BIOCOI>2.0.ZU;2-A
Abstract
In ultrasonic diagnostic equipment, I/Q signals are usually used for the co nstruction of B-mode images. displays in the M-mode, and the acquisition of Doppler information. On the other hand, the number of ultrasonic diagnosti c equipment in which the digital technique is applied has continuously incr eased. Accordingly, it is important to understand how I/Q signals are digit ized and compressed. In this study, the compression of I/Q signals by wavel et transform is attempted. First, the results are compared with those of a typical compression method by discrete cosine transform (DCT). The proposed method achieved a higher compression ratio than DCT under the same quality of the restored signal. Then, several types of mother wavelets (MWs) are t ested. The MW can control the efficiency of compression. The result suggest s that the most appropriate MW for I/Q signals compression exists.