111712358-Chapter1-Intro-of-Biomedical-Signal-Processing.ppt

biomedical Signal processi processing ng 生物医学信号处理

hap!er 1 "n!roduc!ion 刘忠国 Zhongguo Liu Biomedical Engineering School of Control Science and Engineering, Shandong University

Zhongguo Liu_Biomedical Engineering_Shandon

Self Introduction [email protected] Tel:88384747 cellphone:18764171197

Zhongguo Liu_Biomedical

Goals of the course # $o unders!and % &ha! biomedical signals are % &ha! problems and needs are rela!ed !o !heir ac'uisi!ion and processing % &ha! (ind o) me!hods are available and ge! an idea o) ho& !he* are applied and !o &hich (ind o) problems # $o ge! !o (no& basic digi!al signal processing and anal*sis !echni'ues commonl* applied !o biomedical signals and !o (no& !o &hich (ind o) problems each me!hod is sui!ed )or +and )or &hich no!,

Processing Signal- an* ph*sical 'uan!i!* !ha! varies as a )unc!ion o) an independen! variable # independen! variable is usuall* !ime bu! ma* be space dis!ance ... Biomedical signal- a signal being ob!ained )rom a biologic s*s!em /origina!ing )rom a ph*siologic process +human or animal + medical  pa!ien!s,, rocessing rocessing o) biomedical biomedic al signals all !rea!men! +o) biomedical signals, &hich occurs be!&een !heir origin in a ph*siological process and !heir in!erpre!a!ion b* !heir observer +e.g. clinician,

rocessing o) biomedical signals

signals rocessing

o) biomedical signals is applica!ion o) signal processing me!hods on biomedical signals 3ll possible processing algori!hms ma* be used Biomedical signal processing re'uires understanding the needs ( e.g. biomedical processes and clinical re'uiremen!s ) and selecting and applying suitable methods to meet these needs

Rationales for biomedical signal processing 1.3c'uisi!ion and processing !o e4!rac! a  priori desired in)orma!ion 2."n!erpre!ing !he na!ure o) a ph*siological process based ei!her on a, observa!ion o) a signal +e4plora!ive na!ure, or b, observa!ion o) ho& !he process al!ers !he charac!eris!ics o) a signal +moni!oring a change o) a prede5ned charac!eris!ic,

(Some) goals for biomedical signal processing #

6uan!i5ca!ion and compensa!ion )or !he eec!s o) measuring devices and noise on signal # "den!i5ca!ion and separa!ion o) desired and un&an!ed componen!s o) a signal # Uncovering !he na!ure o) phenomena responsible )or genera!ing !he signal on !he basis o) !he anal*sis o) !he signal charac!eris!ics % 8ela!ed !o modelling / inverse modelling bu! o)!en more pragma!ic

E4ample- hear! ra!e me!ers Sensor

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ea!ure e4!rac!ion ?a!a compression Segmen!a!ion a!!ern recogni!ion  $rend de!ec!ion Even! de!ec!ion ?ecision suppor! ?ecision ma(ing

>il!ering +linear nonlinear adap!ive op!imal, S!a!is!ical signal processing >re'uenc* domain anal*sis  $ime)re'uenc* anal*sis >u@@* logic 3r!i5cial neural ne!&or(s E4per! s*s!ems rulebased s*s!ems Aene!ic and evolu!ionar* me!hods

Signal processing methods Signal modelling ;avele!s and 5l!er ban(s 3 "3 S9? lus!ering as! >ourier $rans)orm +>>$, even be)ore !he publica!ion+*++, o) >ouriers !rea!ise on harmonic series represen!a!ion o) )unc!ion +proposed in 107, Zhongguo Liu_Biomedical

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'istorical Perspectie ;i!h

He4ibili!* !he digi!al compu!er &as used !o appro4ima!e or simula!e an analog signal processing s*s!em  $he digi!al signal processing could no! be done in real !ime Speed cos! and si@e are !hree o) !he impor!an! )ac!ors o) !he use o) analog componen!s. Some digi!al He4ible algori!hm had no coun!erpar! in analog signal processing imprac!ical. alldigi!al implemen!a!ion !emp!ing Zhongguo Liu_Biomedical

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eVcien! algori!hm )or compu!a!ion o) >ourier !rans)orms &hich reduce !he compu!ing !ime b* orders o) magni!ude.

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migh! be implemen!ed in specialpurpose digi!al hard&are

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imprac!ical signal processing algori!hms became !o be prac!ical Zhongguo Liu_Biomedical

'istorical Perspectie >>$

is an inheren!l* discre!e!ime concep!. >>$ s!imula!ed a re)ormula!ion o) man* signal processing concep!s and algori!hms in !erms o) discre!e!ime ma!hema!ics &hich )ormed an e4ac! se! o) rela!ionships in !he discre!e!ime domain so !here emerged a 5eld o) discre!e!ime signal processing. Zhongguo Liu_Biomedical