DAVID VALERIU,DAVID VALERIU,FOŞĂLĂU CRISTIAN-IOAN,FOŞĂLĂU CRISTIAN-IOAN,BRĂNZILĂ MARIUS-CIPRIAN,BRĂNZILĂ MARIUS-CIPRIAN
申请号：
RO201500306
公开号：
RO131475A2
申请日:
2015.05.04
申请国别(地区):
RO
年份:
2016
代理人:
摘要：
The invention relates to a method for extraction of quasi-periodic signals from noise, intended to be used in processing biomedical signals, such as electrocardiographic signal (ECG), magnetocardiographic signal (MCG) or other quasi-periodic signals of reduced level, recorded in the presence of high-level noise. According to the invention, the method consists in that the waveform of a quasi-periodic signal of very low amplitude recorded in the presence of noise of high amplitude is obtained based on the prior determination (2.2) of duration of all sequences of the quasi-periodic signal, which allows the selection (2.3) of some groups of sequences randomly located in the record, but with the approximately the same value of durations, where, for each so-formed group, a replica of the signal of interest is obtained (2.4) which, together with a replica of the signal for the entire record, obtained by the signal sampling (2.5) and processing (2.6) corresponding to the duration of each sequence, are compared and analyzed (2.7) to permit identification and characterization of specific waves or of changes or evolutions of the signal of interest, even in the conditions in which the records exhibit a very low signal-to-noise ratio.Invenţia se referă la o metodă de extragere din zgomot a semnalelor cvasiperiodice, care poate fi utilizată la prelucrarea semnalelor biomedicale, cum ar fi semnalul electrocardiografic (ECG), semnalul magnetocardiografic (MCG), sau a altor semnale cvasiperiodice de nivel redus, înregistrate în prezenţa unor zgomote de nivel ridicat. Metoda conform invenţiei constă în aceea că obţinerea formei de undă a unui semnal cvasiperiodic de amplitudine foarte mică, înregistrat în prezenţa unor zgomote de amplitudine mare, este realizată pe baza determinării (2.2) prealabile a duratelor tuturor secvenţelor semnalului cvasiperiodic, ceea ce permite selectarea (2.3) unor grupe de secvenţe situate aleatoriu în înregistrare, dar cu aproximativ aceeaşi valoare a d
