Online Journal
IF値: 1.314(2020年)→1.878(2021年)


Journal of Medical Ultrasonics

にて英文誌のFull textを閲覧することができます.


1997 - Vol.24

Vol.24 No.08

Original Article(原著)

(1013 - 1018)


Interpolation of Segmented Doppler Audio Signal Based on Zero-corssing Points Fold Back

李 太宝

Taibao LI


Advanced Technology Center, GE Yokogawa Medical Systems, Ltd.

キーワード : B/Doppler duplex, Expansion, Signal interpolation, Zero-cross

We developed a new technique for expanding Doppler audio signals and applied it to the interpolation of periodic blanked segments in a duplex system with B-mode imaging and pulsed Doppler. This technique detects the zero-crossing points of the Doppler audio signal wave form and assigns each segment between a pair of zero-crossing points a positive value and then a negative value, thus expanding the Doppler audio signal so that it provides continuous output during the subsequent blanked segment. Compared with conventional interpolation methods that use wieghted duplication of Doppler audio signals to fill in blank segments, this technique provides better audio quality and requires less computation.