Luận án Ứng dụng công nghệ corba vào lãnh vực điện thoại và nhận dạng tiếng nói

,1'dichchuy€nyangtrailvoiehu6icaexungcoehu ky21tIN.fHp lingxungtudnglinghen)la tichcuawen)voidaycaexung coehukyN. B€ giamdQphliet~ptinhtoannguaitachQnwen)codQdai xaedinh. 2.1.1.4.Dtf baotuye'nHnb: D~ngd1,1'baatuye"ntinh: p X(n) =Lakx(n - k) k=1 61 k:. 32 ms f1(t! 1 .., I ~t /1;. , \\ ('V; ,\, I i . ~. \l / /\/", l flJ.. ':.- .- 'i.., l .' -\- ; it I \" \, \\ I' ., \j.' ", !.,,- f"(t) I I ,! I I I I' !, "' ',' h " 1\' I' 01\ ' " ..., I , ,. , I' , '" ., t. " .' ' ~ .1 ,0!~ ,.J.\,I\JV" ",.\(IJ\:.. J",/\V\~"!'I\"', "I/~,',I:,",- 0 Iv\~ '!\ii!Y i\lv;' , \ IfJ\ ~\IV' ~\j\" \\\'\ T. '~ \ . , , \ J -1 j . F, (jwJ i/N 0,3l I F2(jw) :/N 0,3 0.2 0.2 0.1 -1 I 0.0 ~.U-"-rl 0 JJ~...~~ -, , 0,1 2 4 Frequency(kHz) 62 0.0 !l.JV\, 'A 0 2 4 Frequency (kHz) Trangd6,X(n) last!ke'thQptuye'ntinhcilap ghitritruck.Theod6bQdt! baaP lamQtbQlQcvoidapling: p Fez)=I akz-k k=l Tin hi~utie'ngn6iX(n) c6duQckhi choden)quamQtbQlQcc6d(~mg: 1 - 1 = P -k H(z) -1- Fez) 1- Iakz k=! Trangd6bQlQcdao I-P(z) chora den)voi ph6loi d~tc616iluQngh6a nhonha"t.Do d6P (z)duQcchQnsaGchoH(z)~ X(z).Cach~sf)akduQc chQntf)i u'usaGcho t~ora H(z) g'anvOiph6tie'ngn6i p h~sf)nha"t.Chi tie'tcila ph'annay se duQctrlnhbay ky d ph'an"Phuongphapmah6adt! baatuye'ntinh." 2.1.1.5.Ham cll'a86 Cuas61amQthamxung: W(jco) =a(j0)) Hamnaychota: H (j0))=Hct(jO)) Trangd6 ph6hlnhdangcilaxungtuythuQcVaGdaycaccli'as6 c6 chi'eudaixacdinh.SaildaychungtalamquellmQtsf)caccli'as6c6ph6 lahamxung. Saildaylacaccli'as6thuongdung: 63 I. RoctangulJr IV. = I: In! S N = 0: N1Jck. t...; 1, BanlotC Inl IV.= I - -: /nI s NtV =0: ~~u'ocI~..i J. Hann,"~ IV.= 05(10'" CDS(~")): H s.v =0: ~11U~'-t~ .1. H"mm,"~ ( """ )"'.=1J5-1-'-O..1oCt,,,--;: il/ISS =0: 5. Blackman ( rrn )"'. = 0.-11-'-0.5CDS N =0: !\1'jH'~L(9-; ( 2rrn ).;-0.08 CDSN: Inl s .v 1--1~'.l'3<.I"!-J' 6 Kaisor . /.,t{3\i1- "'IN)'): ",Is.v"'.= /,,1131 = 0: N~'Jdc.!':'J 64 l1l', -N 0 N -"I 0 N /1\, -N 0 N O -N 0 N 1I 'N. " -"I 0 N o -N 0 N 2.1.1.6.Nendii'li~uamthanh. Dli li~uamthanhla sl;r'mahoacacbiendQcuasongamrheathaigian. Chonendli li~unayr:itIonvachitmnftnhi~utUtrongbQnho.Vi dV:1 tutrungblnhkhoang3-4Kb. Bi~unaygaytrang~iv~m~thaigianva hill trlichocacbQxU'19titngnoi.VI v~y,dli li~utniockhi It(uho~cxU'19 thuangduQcnenl~id€ to'iUtihoathaigian. 1.Nenkhongma'tdii'lieu: BO'ivoi dli li~uamthanhcoth€ xemnhub:itky lo~idli li~unao.Co th€ dungcacphuongphapnenc6di€n nhuLZQ, HUFFMAW...Nhung kh6ngduQcapdvngrQngraivaotrongcach~xU'19VIthaigiannenqua lauvakh6ngth€ xU'dvngd€ nendQng. 2.Nenma'tdii'lieu: Sail dayla mQtsO'phuongphapnenco lammatdli li~unhungv~n kh6ngthayd6ititngnoikhiphatl~i.CacphuongphapnaytorahU'uhi~u dO'ivoi cach~xU'19titngnoiVI thaigiannenvabungr:itnhanh,thich hQpchoquatrlnhnendQng.... a.Nenzero: PhuongphapnaycoduQcdod~ctinht~ptindli li~uamthanh.Truoc khi tab:ltd'aunoivangaysailkhi ch:imdillmQttu,comQtkhoangl~ng r:itnhogiliahaiquatrlnhnay.Cackhoangl~ngnayclingQuQcIUtinhu amthanhl~ng. Cackhoangl~ngnaykh6ngh~anhhuanggldtn chatluQngamthanh dodocoth€ bodikhilUtitrliho~cxU'19. fS(n) N(s) ~ t s(n)>I; S(n)<1;,S(n-1) <1;, 05(0)<I; S(n)<1;,S(n+)<1;, o5(max)<I; hay 65 Hieuqua: Hi~uquaDenduQCtuythuQcvaoca'utrucdfi'li~u.Nghlala khoang l~ngnaydaihayngiln.Ti l~c6th6thayd6itup%d€n 0%,trangd6p la 1s6duong(p>O). b.Phztdngphap nenlztdngbien Phuongphapnayd1/avaod~cdi6mluQngh6acuabiendQkhimah6a tinhi~ud6Dendfi'li~u.Trenth1/ct€ biendQamthanhra'tlOn,giasatu0 d€n +1OOOmv.Trangkhi d6d6In'lltrfi'dfi'li~unay t~im6ithaidi6mta chic6 1byte,la'ygiatri t6ida-127d€n +128.V~ylamsaoghil~idu'Qc giatfi tu0 d€n +1000mv?NguaitaluQngh6a,gi6ngnhuthunhobiendQ l~irheamQtti l~tuongling.Vi d\lnhuchia dQcao1000mvthanh128 do~n.M6i do~nchigifi'l~i1giatfi d~ctIlingtuonglingvoi gia tfi cua byte. 'i LQi d\lngytudngtIeDtac6th6luQngh6adfi'li~ul~icon7 bit,6 bit...3 bit th~mchi 2 bitho~c1bit thayVI 8bit(lbyte).Tu th1/cnghi~mchotha'y 3 bit la mlict6i thi6ud6luQngh6a.Tuy nhienamthanhc6 it nhi~ubi anh huangd€n cha'tluQngkhi ph<itra loa. c.Phztdngphapnenlztdngtiln: Tuongt1/nhuphuongphapluQngbien,nhungd6ivoi fans6.Khi rai r~ch6atinhi~u,nguaitachigifi'l~imQts6cacgiatrirai r~ccuabiendQ. S6cacgiatrinaytIeD1giayduQCgQilafans61a'ym§:uFs. '8 ,I Ta c6 th6apd\lngla'ym§:uthemmQtfannfi'avoi din s6 nhohall. Nghlala bobotdimQtchukynha'tdinh.Giasatac6mQtdaytinhi~urai r~cvoi t'ans61a'ym§:ula Fs=16kHz,taDendfi'li~ub~ngcachbodi mQt giatritrangmQtc~p2giatriraiqc lient\lc. Nhuv~ykichthuocdfi'li~uchicon50%.Va di~unaytuongduongvoi vi~cta la'ym§:udfi'li~uvoi t'ans61a'ym§:ula Fs/2=8kHz.Nhu v~ytuy rheas6luQngcacgiatfi bodi va cacgiatri gifi'l~i,matac6duQcti l~ Den.Phuongphapnaykh6ngduQcdungvoit'ans61a'ym§:uquanhoVIse lammeaamthanhkhiphatl~i. 66 NhuV?yvoicacphuongphapnenthongthuangthlh~khongsli'dl,mg duQcVIdoih6ithaigianth1,1'c.Chicophuongphapnenzerothlb~tbuQc phaidungd~luQtb6ph'anduli~uduthua.PhuongphapluQngbienva luQngt'anthlsli'dl,lngtrongmQtgiOih~nchophep,tUGla v§:nbaadam chc1tluQngamthanhsailkhi nell,VI nhuV?ymoi condu thongtin d~ nh?nd~ng.HaiphuongphapluQngbiencolQila lamgiamdu'Qcthaigian tinhtoanVIs6li~udanh6di! 2.1.2.Caed~ihi(jngdijetru'ngeuaamthanh Chuangnaychuye'unghienCUul~icacdi[ictIlingv'ebanchc1tV?tly cua amthanhduQct~oravaIantruy'enhuthe'naotrongkhonggian.Ph'anhaila cacdi[ictIlingv'etinhi~ucuaamthanhkhithuvahilltruduQcbtLngcacthie't biv?tly. 2.1.2.1.Cae d~iIu'(jngv~itIy Khi kichthichdaodQngamthanhtrongmoitruangth~khi se hlnh thanhnhunglOpkhibinenvanhunglOpkhibigianl'anluQtIantruy'entu ngu6namthanhduoid~ngsongdc(songamthanh).Di'eudoconghlala s1,1'dichchuy~ndaodQngcuacacph'antli'm6itruangdi~nratheophuong truy'ensongamthanhduQcgilatiaamthanh. KhonggiantrongdosongamIantruy'engila truangamthanh. T6e dQtruy'ensongamthanh,git~tla t6cdQamthanh,ph1,lthuQc vaolo~imoitruangvatr~ngthaiV?tly cuamoitruangdo. T'ans6daodQngmatainguaicamthl,lduQcgila t'ans6amthanh. Cact'ans6dontLmtrongkhoangph~mvi tu16de'n20000Hz.Nhungdao dQngxuc1thi~ntrongmoitruangcot'ans6thc1pbon16Hz gila h~am. CaedaodQngcot'ans6caobon20000Hz gilasieuam. QuatrlnhdaodQngtrongph~mvi t'ans6amthanhduQcdi[ictIlingbdi s1,1'nenvagiando~n hi~tgiuanhunglOpkh6ngkhibinenvabi gian. 67 iN€u ngu6namthanhbucx~ciaodQngdi~uhoa,thl sail thaigian ngu6nbucx~thlfchi~nmQtciaodQngd'aydu(mQtchuky)quatrlnham thanhsetruy~nIandu'QcmQtquangdu'angb~ngbu'ocs6ng. v~bancha'tv~tIy, khi truy~ns6ngamthanh,chuy~ndQngciaodQng cuacamoitru'angIamQtchuy~ndQngcdhQc.TrongcaclOpbinenvabi gian Kenke cuamoitru'angdienraslfbi€n thienapsua't(tinh)cuamoi tru'ang.5lfchenhI~chgiuaapsua'tInhvaapsua't~imQthaidi~mchQn tru'ocuatru'angamthanhgQiIaapsua'tamthanh. Ngaycakhi phatamIOnnha'tcacngu6namthanhthlfct€ (nhud~m nh~c,nguain6i)clingchit~oramQtapsua'tamthanhnh6honhangchl,lc nganfansovoiapsua'tkhiquy~n. Ap sua'tamthanhbi€n thientheothaigian,hdnnuaI~iphl,lthuQctQa dQ(x,y,z)cua di~mkhaosattrongtru'angamthanh. Khi truy~ns6ngamthanh,chuy~ndQngciaodQngcuacacph'antli'moi tru'angclingdu'Qcd~ctIlingbaislfdichchuy~nciaodQngkh6ivi tri tinh. 5lfdichchuy€nnaydienravoit6cdQxacdinh,gQiIat6cdQciaodQng. Ngaycakhi phatamIOnnha't,cacngu6namthanhthlfct€ clingchi gayramQtt6cdQciaodQngnh6hon t6cdQamthanhvainganI'an.T6c dQciaodQngbi€n thientheothaigian,hdnfilla,phl,lthuQcvaotQadQ di~mkhaosattrongtru'angamthanh. Congsua'tamthanhP Ia nangIuQngmas6ngamdichchuy~ntrong mN donvi thaigiantheophuongIantruy~ncuanothongquadi~ntich m~tsong(m~ts6ngIam~tciaodQngcuaamthanhlamxua'thi~ns6ngam thanhtrongmoitru'angKungquanh).. CuangdQamthanhIa thong Iu'QngcuanangluQngamthanhchay trongmQtddnvi thaigianquamQtdonvi di~ntichm~tth~ng 6cvoi phu'ongtruy~ns6ngamthanh.CuangdQamthanhla mQtd~ihtQng vector.N6i cachkhac,cu'angdQamthanhchinhIa congsua'tamthanh traiquamQtdonvi di~ntichm~ts6ng. 68 TruonghQpphuongtruy'ens6ngamthanhkh6xacdint ho;1ickhong th~xac dint n6i, nguoita dungmQtd;1ictIlingnangluQngkhacclla truong.B6la m~tdQnangluQngamthanh,tucnangluQngamthanhchua trangmQtnangluQngth~richcuatruong. NangluQngamthanhla nangluQngco hQchQpthanhtudQngnang chuy~ndQngcuacacph'anttrmoitruongvathSnangnen. 2.1.2.2.Caethams6theothaigian Cac thams6nayc6 di~mthu~nlQi la ra't dongian,It t6nkerncac pheptint roand~c6duQCva clingra'tc6ichchovi~cmah6ava nh~n d<;ingtInhi~u:nhunangluQng,biendQ,t'ans6cobanFO...nanglu'Qng thuongduQcdungd~phando<;introngquatrlnhnh~nd<;ing. 2.1.2.2.1.Phantiehtinhi~utheothOigian Phanrichtinhi~urheathaigiannghiala ehuy~nchungthanhcae thams6ft thayd6ihonsovoitInhi~uti€ng n6iband'au.Cacthams6 naythuduQcrheahambiend6isan: Trangd6 Sell)la tInhi~uti€ng n6i.T la hambi€n d6iphi tuy€n, wen)laham r:JJ (In) =I1iS(m)].W(n-m) fYP-r:JJ trQngs6ctras6,Q (n)lahamtrailcuaT(s(n)). 2.1.2.2.2.Tans6cdbaneuatiC'ngnoi: Trangsu6tquatrlnht<;iOthanh,caedaythanhamduQclamchorung dQng.T'ans6cobannayduQedungdephanbi~tcaegiQngn6i.T'ans6 eobanthuongchotaeacthongtinv'engudi~unhula amsa:eva am di~u(Stressandintonation).Sl1tanghaygiamtrenduongbien t'ans6 cobanduQcdungdedanhda'ueaerangbuQccuphapehinh. 69 2.1.2.2.3.Nang lu'qngtrung binh: MQttrangnhungd~ctinhquailtrQngnh5tcuatinhi~uti€ng noi la cuangdQthayd6inhula mQthamcuathaigian.Sv thayd6inghiem ng~tgiuacacvungfans6khacnhauchotaphanbi~tdu<jcacamcua ti€ng noi. Cacd~ctrungv~Danglu<jngthuangthudlt<jCtubQIQcs6haytuong tvcllasongamho~ctuph6thaigian. Q(n)la Danglu<jngho~cbiendQtrungblnhn€u T la pheptoaDblnh phuongcvcd?i.Nanglu<jngthuangdungd6donhungnoicomQtbien dQIOn.Con biendQtrvcti€p du<jcdungkhi mu6ntranhnhungtinh toaDvoi s6IOnco th6d~nd€n trails6thvc.Nhungthams6v~Dang lu<jngnaycoth6giupthemthongtintrangquatrlnhphando?nmQtin hi~uti€ng noithanhnhungdonvi nguam(nhucachint vi va amvD. Nanglu<jngQ(n)thayd6idangk6giuaamhUllthanhvaamvothanh. Trangnh~nd?ngtutachbi~tQ(n)coth6giupxacdinhdi6mb~td'au vadi6mdungcuamQtu. 2.1.2.2.4.M~tdQdiim zero: I-IU\.JT~AN H 0 2 4 6 a 10 v; "':~:'NH 0 2 4 6 6 10 70 Nhungphuongphapd'autieDtrongvi~cnh~nd<:lngtie'ngnoi chu ye'udt!aVaGm~tdQdiSmzero.NghialadiSmcacgiatribang0cuatin hi~utie'ngnoid d'auVaGdStie'nhanhphando<:ln.Phuongphapnayco u'udiSmlamQthu~troandongianvad~caid?t.M?c dlichuacobang chungnaGchothiy com6iquailh~r6ranggiuam~tdQdiSmzerova st!tuongquailgiuanguamvaphatamtrongIanthanhtie'ngnoi.Tuy nhiencaccO'gangg'andayclingtoranhi~uhuah~ntrongm6ituong quailgiualy thuye'tnguamvam~tdQzeronay. Thongthuangmu6nco duQcph6tinhi~u,chungtaphaitht!chi~n cacphepbie'nd6iphuct<:lPv~t'ansO'nhuFFT ho?cLPc. Trongkhido chungtacomQtlo<:ltph6dongiandola m~tdQdiSmzero.Nghiala sO' l'anmatinhi~udiquatrl;lchoanh(biendQzero)rheatungchuky thai gian.Tuph6zeronaychungtacothStinhduQct'ansO'FO=Z/2,trong do Z la m~tdQzerotIeDm6igiay.D6i voi tinhi~urai r<:lc,m~tdQ diSmzerotliythuQcVaGt'ans6la'ym§:uFm,Dentaco:FO =(Z * Fm) /2,trongdoFmlat'ans6liy m§:u. M~tdQdiSmzerocothSduQcdinhnghiamQtcachroanhQcnhusau: T[s(n)]=0.5Isign(s(n)- sign(s(n-l)! trongdo: Sign(S(n)= { I nC'uS(n)~0 - 1 nguQc1qi Va w (n)la mQtcii'as6hlnhchITnh~ti lt$IIN (N la chi~udaicua s6).Tu do tatinhduQcQ(n)la m~tdQzerorheacacm§:uhayFm/N rheatunggiay.M~tdQzerocothSgiuptaxacdinhduQcmQtamva thanhhayhU'uthanh.M~tdQzerocaola amva thanh,nguQcl<:lim~t dQzerothip la amhU'uthanh.Tuy nhienm~tdQzerorit d~bi anh huangbditie'ng6ncuamoitruangvathie'tbichuySnd6iAID 71 2.1.2.2.5.Ham tu'dngquaD: Tin hi~uco du'<;ctli'phepbie'nd6i ngu'<;cFourierrheaph6nang lu'<;nggQila hamtu'ongquailcilatinhi~uband'au.Hamtu'ongquail clingca'pchochungta thongtin v'ecacvlingdi'euhoa,cacbiendQ formantva cacdinhchuky,xacdinhamvo thanh,hUllthanh,va dlf baatuye'ntinh. Hamtu'ongquailla mQttru'angh<;pd~cbi~tcilahamtu'ongquailcheo: cD(k)la hamtu'ongquailgiuahaitInhi~us(n)va y (n)rheathaigian 00 <D(k)=Ls(m)y(m - k) m=-oo tn~giua chungdu'<;ctinhb~ngcachla'yt6ngcactichs6cilahaitinhi~us(n)va tInhi~uy(n)du'<;clamtn~.Hamtu'ongquailcheonaychoke'tquara't IOnne'uhaitInhi<$uco clingd(;lngsong.VI v~ythu'angdu'<;cgioih(;ln b&ihamcuas6vachiachos6m§u. Khi s(n)va y(n) la mQttInhi<$uduynha'thl cD(k)tr&thanhham tu'ongquailthu'ang.cD(k)la mQthamch~n(cD(k)=cD(-k) ) va la'ygia tfi clfcd(;lit(;lik=O.cD(O)tu'ongdu'ongvoinanglu'<;ngcilatinhi<$uco chu kyP, thlcD(k)clingcochukyP.DaylamQtrongnhungu'udi€m thu~n l<;itrongxuly tinhi~u. Ham tu'ongquailcila tinhi<$us(m)quacua86w(m)du'<;cvie'tnhu'sail: 00 Rn (k)=Ls(m)s(n- m)s(m- k).Yi{n- m+k) m=-oo trongdo tichs(n)voi tIn hi<$udu'<;ctr6s(n-k)tu'ongdu'ongvoi choqua mQtbQlQcw(n)w(n+k),k du'<;cchQntliy rhealingdt:mg. 72 2.1.2.3.Cacthallis6theofans6 H'auhe'tcacthams6dungtrongxU'ly tie'ngn6ila cacthams6rheat'an s6.BQph~nt9-0amt9-0racactinhi~uchuye'ula slfcQnghuangrheat'an s6.DlfaVaGph6t'ans6,nguaitalQcraduQccacye'ut6chinhxachoncac thams6rheathaigian.Va honnua,coche'nghecuataingu'aic6venhu laphuongphaplQccacthams6rheat'ans6. 2.1.2.3.1.B() l()cdiUfan: LQcdiEt'anla mQttrongnhungphuongphapphantichph6nhanh ch6ng,dongian,ph6bie'nvad~caid~tnha't.N6phantichcacdffit'an s6khacnhaucuatinhi~utie'ngn6iband'au.MQts6cach~nh~nd9-ng Sl(dvnghaimUGphantichph6:mUGthosoband'aubdivaibQlQcso bQ.Sail d6 la cacbuckphanphantichchi tie'tsU'dvngnhi'eubQlQc hall. BQlQct'an56: hr(n)WI(n) n"'i~~ ~ Xr(n) S(n) ~ Xq(n) 2.1.2.3.2.Ph6fans6 MQtky thu~tc6di~nnhungchinhxacnha'trongvi~cphantichph6 la chu6iFourier.Phuongphapnaybie'nd6ibiendQvaphasecuatin hi~uthanhmQthamcact'an56rheathaigian. Hambie'nd6iFouriercuatinhi~uSell)duQcdinhnghlanhusail: 00 Sn (eiW)=Ls(m)e-icW1w(n- m) m=-oo 73 Ne'uc6dinhcothlbieuthucteenchinhla tinhi<%uQ(n),trongdoT la phepnhancacs6phucvdieO>(cola t'ans6) Tren thl!cte',cacdaodQngamthanhdi~uboartt it khi xayfa. Thu'angthltie'ngnoidu'Qct~orathanhtumQt6hQpcacdaodQngvdi cacmuct'ans6vabiendQkhacnhau.Cacsongamnayrtt phuct~pva tuythuQcnhi~uvaotlnhtr~nghiephatam.Khacbi<%tv~ngu'oinoi, tamsinh19hicnoi,moitru'angapStitthicphatamvacakhoangcach tumi<%ngde'nmicrothuam.Cacye'ut6nayanhhu'angnhi~ude'nsong amlamchonotranenphuct~pvabie'nd6ilienWc. De cocacd~ctru'ngv~t'ans6vanangIu'Qngcuasongam,ngu'aita dungrnQtcongC1J.quellthuQctrongxli'19tinhi<%u:chu6ifourier.Chu6i fourierla mQtkhaitrientoanhQcgiupphantichmQtt'ans6phuct~p thanht6ngcuanhi~ut'ans6tu'anhoandongian,haymQtsl!t~ptrung nangIu'Qngthanhnhi~umucnangIu'Qngkhacnhaudu'QcgQiIaph6. Phu'ongphapnayIty ph6naycou'udiemlatrichdu'Qcacd~ctru'ng tu'ongd6i chinhxac v~m~tnguamhQcva giupta phanbi<%tdu'Qc nhi~ulo~iamthanhkhacnhau.Tuynhien,nhu'QcdiemIOncuaphu'ong phapnayla t6nkernthaigiandophaithihanhmQtlo~tcacpheptoan phuct~pchom6il'anIty ph6.Tru'dcday,phu'ongphapnaychidu'Qc thl!chi<%nteencaclo~imaytinhIOn.Nhu'ngngaynay,vdisl!phattrien nhanhchongcuaph'ancling,caclo~imayPC clinghilahynnhi~ukha nangthl!cthiteenchung. 2.1.2.3.3.Tan86cdbanFO (dQcaociiagiQngn6i) T'ans6cobanFa haygiQngnoi Ia mQttrongnhungthams6quail trQngcuacach<%nh~nd~ngtie'ngnoi.Th~tragiQngnoila ye'ut6cua camxucngu'aikhinoi.Nhu'ngngu'aitathu'angd'ongnhttt'ans6Fa vdi "giQng"noi.Cacamhuuthanhdu'Qct~oratusl!daodQngcuacacday amthanh.CacdaodQngnay t~ora t'ans6co banFa va thu'angthe hi<%nb~ngcacchuky teentinhi<%usongam.Daylaye'ut6amhQcchu ye'udet~onenngudi<%utrongWinoivaclinglaye'ut6quy€tdinhcae 74 amvi trongm6ing6nngfi'.Fa clinglay€u to'chiiy€u t~onenngfi'di~u trongcach~t6nghQpti€ng n6imQtcacht1,1'nhien. Vi~cxacdinht'ansO'Fa tudngd6idongian.Dli c6 ra'tnhi~uthu~t toanduQcc6ngb6vachok€t quag'annhu100%.C6thSxacdinhtn,ic ti€p trentinhi~uti€ng n6imakh6ngc'anphaiquamQtbuocchuySn d6iphuct~pnao.Fa c6thSduQcxacdinhtucacchukytheothaigian ho<lictucachamdi~uhoatheot'ansO'. 2.1.2.4.D~ctinhamhC)cvatinhi~uamthanh: 2.1.2.4.1.Nguyenam: Ba sO'cac h~nh~nd~ngchii y€u d1!avao vi~cnh~nd~ngcac nguyenam,VI nguyenamla ph'ancd banto IOnnha'tcuamQttu. NguyenamduQcchiathanh3 nh6mchinhg6m:nguyenamtruocII/, lei, lei; nguyenamgifi'ala/,II'J,101vanguyenamsaillvi, lu/,101. Nguyenamtru'ocla s1!cQnghuangcuat'ansO'caD,nguyenamgifi'a c6mQtnangluQngcand6itrenmQtda:it'anrQng.Trongkhid6nguyen amsailc6u'udiSmv~cact'ans6tha'p.Tuynhien,c6mQts1!thayd6i ra'tIon gifi'acact'ansO'cdbanclingmN nguyenamdonhi~unguai phatamd6ikhich6ngla'pl§:nnhauvadi~unaygayranhfi'ngtrdng~i ra'tIOntrongva'nd~nh~nd~ng. 75 J.L f"1 t A ~ I J. I aI, \,I\I\)!:I,',r,/Lt,/\.,',n,:, 1"' VY "\I\""'I' y "\ y'""",,,'f . , . Y" y , . '( y,,' a -11,LL'\II._L~...!., L.I.'- III'" pV", 1fT" J/Yv' I)ltl J t' I I , , ,- \ ~ II.J.../'- /I /, . '" 'I...L.::,Ji " ", /. 'y--v~ -,:""",\,-:-:-:,,\:,,7'"',""\'° \ f f ' I I li~f\ I. A I,A,./\.!\,/I.r.,/i"o, VV I/VV \'V'/ \'yv t'VV l'\"o u , /'IA " !\A f, fI f\ i, roil II " 1\i,A( ~'VVVVVVVVVV(iViJ\j\'IJ 76 2.1.2.4.2.Nguyenamdoi: Trongnguyenamdoi,biendQthuanggiamd'antrongkhoangtruQt giuahainguyenamvatangm~nhd6ivdinguyenamthuhai. 2.1.2.4.3.Ph\lammfi.i: D~ngsongamcuapht,lammliithuanggi6ngvdinguyenam.Nhung ye'uhonnit nhi'eu.Cact'ans6cobanformanthuangxua'thit$ncach nhau85Hzthayvila 1KHzt'ans6Fl khoang250Hzla trQinha't.F2ra't ye'uvaF3khoang2200HzcodinhcaD.Ph6zerokhoang750-1250Hz d6ivdiIm/,1450-2200Hzd6ivdiInlvatren3KHzd6ivdiIyl 2.1.2.4.4.Amxat: D6i vdiamxatvo thanh,thuangconangluQngt6ithi~ucuat'an56 tha'p,khoang2,5KHzAm xathU'uthanhthuangco nangluQngcua tie'ng6n t~inhungdi~mcot'ans6caDnhuIsl,11'va doikhi co nang 1uQngcochukyye'ut~inhungt'ans6cobanFormant. 2.1.2.4.5.Am dung: CacamdungthuangconangluQngcochukynhot~icacdi~mt'an s6tha'pVaGkhoang200msngaysaukhi he'tdung.Dinh cuaIt! VaG khoang3.9KHz,Id/ khoang365Hztha'phon It/, /k/ 2.7Khz truck nguyenamtrudcvalIen3KHztrudcmQtnguyenamsau. 2.1.3.Phu"dngphapmil hoa dQ.'baGtuye'ntinh Chode'nnayphuongphapmahoadlfbaatuye'ntinh(LPC) v~nchungto lamQtrongnhungphuongphapt6tnha'trongvit$cmahoavaphantichtinh hit$uamthanh.No clingca'pchochungtamQtcachbi~udi~ncacthams6 tinhduQctutinhit$uamthanhchinhxacvahit$uquanha't.Ap dvngphuong phapLPC chungtacoth~giamnhi'euduQcthaigianmahoatinhit$u,tang dQchinh xacva giamduQcdangk~thaigiantinhloantrongnh~nd~ng tie'ngnoi,ngoaifa,concoth~dungd~t6ngh<;5ptie'ngnoi. 77 Trongthaigiang'anday,LPC condu'Qcxemnhu'1amQtky thu~tph6bie'n trongmahoatinhi~utie-fignoihill tnldu'oidt;tngbittho(low-bit-rate)vala mQtcongCl,lra'tquailtrQngtrongt6nghQptie-fignoi[4].TuLPC chungtaco th€ thudu'Qcacd~ctru'ngamthanhnhu':t'ans6cobanFa, cacda'uhi~ucua nguyenamtt;tOra tudu'angd~nam,cact'ans6va cacgiait'ancuaph6tin hi~uvacacFormats.Nhu'ngd~cbi~tathudu'QctuphuongphapLPC lamQt t~phQpra'tit cacthams6nhu'ngchuad1,1'ngcacthongtinv'eca'uhlnhcua ph'antt;tOnguyenam. 2.1.3.1.Caekhaini~medban LPC 1.1mQtphuongphapphantich-t6nghQptinhi~utie-fignoi.GiaSlt n6ugQiV (z)lamQtngu6nkichhot;ttchotinhi~uvaoph6lQcH (z),taco tinhi~uamthanhduQctt;tOralaqz) H(z).V(zO=~(z) H (z)vaV (z) Ia haihamdu'QchQntru'ocrheamQts6di'euki~nrang buQcnha'tdinh,saccho~(z)g'angi6ngnha'trheamQttieuchu§:n aodo voi amthanhg6cS(z).MQtcachdongianV(z) duQcchQnco ph6d~t roanph'ansacchonogiOiht;tndu'Qcackichhot;ttcuaamvo thanhtIling voi nhi~utriing(Whitenoise).E>6ivoi amhii'uthanh,ngu6nkichhot;tt naydu'Qcxemnhu'mQtdaylientl;1cacm~ud6ngnha't,cochukyN m~u (chuky dinh),comQtdu'angph6voicacdaodQngd6ngdt;tng.E>i'eunay tuongt1,1'nhulu6ngkhongkhidu'Qcth6iratudaythanham,la ngu6nkich hot;ttchoduangd~namtt;tOamd6ivoi tru'anghQpamhUllthanh,duQc xemnhungu6nphatraclingbQlQcnhanhmantrongkhing6vaocuano 1.1mQtdaychukycacm~u. S1,1'tacdQngcacthanhmanlen ph6va 6ngtt;tOamdu'Qcmophong b~ngbQ1QcH(z). Mo hlnhLPC Tu tinhi~utie-fignoiSell),mu6nthudu'Qcph6H(z),hi~ntinhi~uvao Sell)tru'octiendu'QCchiathanhnhungphandol,inch6ngHipnhaug6mN m~u. Y tu'dngcobancuaphu'ongphapLPC la voi mQtm~utinhi~utie-fig 78 n6it~ithaigiann,Sell),duQcxemg'andungnhula mQt6hQptuyentinh cuaP m~utinhi~utrudcd6. Sell) =als(n=l+a2s(n-2)+...+aps(n-p) Trongd6cach~s6at.a2,...,an,la cach~ngs6trennhungphando~n tinhi~u '- Ta chuy€nbi€u thucg'andungtrenthanhh~ngthucb~ngcachthem VaGh~s6kichho~t,G(u(n»tac6: p S(n) =L ais(n - i) +G(u(n)) i=l trongd6D(n)la ngu5nkichho~tchuy€nh6avaG laVectorIQithe.Viet l~ibi€u thuctrenrheaz taduQc: p S(z) =Laiz-i s(z)+G(u(z)) i=l tud6tac6hamchuy€nd6i: 1 -~ - S(z) = P -j - A(z) H(z) - G(u(z» 1- I ajZ i=1 Bi€u thucduQcmatab~ngsdd5sau: u(n) Sell) A(z) G Me HThrHDtj DoANTUftN TINHCUA lltNG NOI 79 Tranghinhve D(n)la ngu5nklchha~t,duQctangcuangbdi thamsf) IQithe'G. CahaiduQcxemnhulangovaacuah~H(z)=l/A(z)d~chara tinhi~utie'ngn6iSell) 2.1.3.2.Cd sdtmlll hQCcuaLPC Dl,1'arheahinhve 1,thimf)ilienht%chinhxacgiii'aSell)vaD(u) la: p S(n) =Iaks(n - k)=G(u(n)) k=1 Xem~(n)la t6hQptuye'ntinhcuacacm§:utinhi~utruacd6,tac6 p ,en)=Iaks(n - k)+G(u(n)) k=1 GQiE(n) la 16idl,1'baa,tac6 p E(n)=s(n)-'(n)=s(n)-IakS(n-k) k=1 Vai hamchuyen16i: A( ) - E(z)_ 1- ~ -kz - - ~akz S(z) k=1 Tu d6tatha"yr5rangSell)duQcsinhratUh~tuye'ntinhcuahinhtIling d6E(n)la 16idl,1'baa,b~ngvaiG(u(n)),ngu5ntangcuang. Va"nd'ecobancuaphuongphapphanrichdl,1'baatuye'ntinhla lamsaD xacdinhduQCt~phQpcach~sf)dl,1'baa,{an},tutinhi~utie'ngn6i.Vi cac d~tIlingph6cuatinhi~uthayd6irheathaigian,dad6cacht%sf)dl,1'baa t~ithaidi~mn chatruacphaiduQctinhroantumQtphanda~ncactin hi~utie'ngn6iIanc~nn.Vi v~y,cachuangtie'pc~nchinhla lamsaDtim duQCmQt~phQpcacht%sf)dl,1'baavai16idl,1'baanhonha"ttrenmQtphan 80 do<,inngiincuatinhi~usongam.Thuangthl chi-eudai phando<,innay (tinhtheomsec)dU<;1cgQila ca'pcuaphuongphapd1,1'baatuye'ntinh.De thie'tl:;ipcacphuongtrlnhxacdinhcach~s6d~(baa,tadinhnghlacac phando<,in16ivatinhi~utqithaidiemnnhusail: \ Sn(m)=S(n+m) En(m)=E(n+m) Co 16ic1,1'ctieucuatinhi~ut<,iithaidiemn Ia: En=Ien2(m) . m Trangdo,vie'tl<,iiEn(m)taco: En =~[Sn(m)- takSn(m-k)J De giaiphuongtrlnhtren,tala'yd<,iohamEntheocach~s6d1,1'baaak vachod<,iohamb~ng0, 5En =0,k =1,2,..p 5ak tadu<;1c: p Lln(m-i)sn(m)La Lln(m-i)sn(m-k) m k~ k trangdod~t: rPn(i,k)=LSn (m- i)sn(m- k) m tadu<;1cd<,ingthugQnnhusau: 81 prpn(i,O) =L Ctkrpn(i - k) k=l . lamQth~phuongtrinhvoi p §:ns6,trongd6 c1;1'ctigu16id1;1'baaEn,duQc tinhnhusau: p P Ell =LsIl2(m)-LakLslI(m)sll(m-k)=q}II(O,O)- Lakq}II(O,k) II k=1 II k=1 Mu6ngiaiduQcphuongtrlnhtrendgtinhcach~sO'd1;1'baat6iu'u(akS) taphaitinhn(I,k),1<=i<=p,vaO<=k<=p.Saud6giait~phQppphuong trlnhtuongli'ng.Trongth1;1'ct€ phuongphapdggiaicacphuongtrlnhtren (clingnhudgtinhs)lamQthamtrongs6cuami'enm.BaygiG,chung tasexemhaiphuongphapchinhduQcdungdgdinhnghiami'enmcuatin hi~uti€ng n6i. a/Phuongphaptuo'ngquan: MQtcachdongiannha"tdgxacdinhduQcgioih~nmla xemcacdigm ngaaiphanda~nSn(m)b~Iig0,O<=m<=N-l.Di'eunayc6nghiala nhan tinhi~uti€ng n6iGongthli'cvoimQthamcl'1'as6xacdinhW(m),hamnay c6giatrib~ng0ngaaikhaang[0,N-l]: ~n(m) { S(m=n).W(m) 0 O<=m<=m<=N-l NguQcl~i tUd6tac6 16itIlingbinhphuongla: N-l+p En =L en2(m) m=O hIed6 n(i,k)c6thgduQctinhnhusau: N-l+p rpn(i,k)= Lsn (m- i)sn(m- k) m=O hay: 82 N-l-(i-k) r/Jn(i, k) = L Sn(m)sn(m +i - k) m=O Phuongtrlnhtenla hams6theotheo(i,k),thayVI i va k. Hamd6ng bie'n,<Dn(i,k),duQerutgQnl~ithanhmQthamtuongquaildongian: N'-l-(i-k) r/Jn(i,k)=rn(i,k)= LSn(m)sn(m+i-k) m=O Trang d6hamtuongquailla mQthamd6i xung,tuefn(-k) =fn(k).Cae phuongtrlnhd1,ibaatuye'ntinhduQetinhnhusau: p Lrn (Ii - kl)ak =rn(1) k=1 l~i~p D"mgmatr~n r"(0) r"(1) r"(1) r"(p -1) r"(O) r"(p - 2) 0, rJ/(1) r" (2)00 = lrJ/(; -1) r"(p - 2) rJ/(0) lop rJ/;p) J Ma tr~nnaye6tinhehfftToeplitz,e6th6dungthu~ttoanDurbind6giai. bl Phuong phapd'ongbie'n MQt eachkhaed6 xae dinhSn(m)la e6 dinhO<=m<=N-1 d6 tinh 16i tIlingblnhblnhphuong: N-l En=Ien2(m) m=O 83 N€u n(i,k)du'<;jcxacdinhnhusau: N-i-l I rpn(i,k)= I>n(m)sn(m+i-k) m=-j l~i~p O~k<p Hay b~ngeachd6ibi€n, tadu<;jc: m=-i l~i~p O~k<p N-i-l rpn(i,k)=Lln(m)Sn(m+i-k) N€u xem i=p,thl trongphuongtrlnhtren,Sn(m)du<;jcdinh nghlatu m=-ptoi m=N-l-p, va khi k=O,Sn(m+I-k)dinhnghlatren(0 toi N-l). Do do mi€n xac dinhd~tinhroand'ayd{'ttu Sn(-P)toi Sn(N-l). Nghla la cae m~uSn(-P),Sn(-p+l)...,Sn(-I) B~ngeachdungmi€n mdrQngcuatin hi~ud~xacdinhcaegia tfi d'ongbi€n <pn(i,k),d(;lngmatr~ncuacaephuongtrlnhrichphandt;1'baa tuy€ntinhla: ......................... ell el2 rP"(1,0) rP"(2,0) rPlI(I,l) rPll(2,1) rP"(l,2) rP"(1,p) = rP"(p,l) rPll(p,2) rPll(p, p) elp rP"(p,O) Chungtacoth~dungthu~troanCholeskyDecompestd~tinhmatr~n dO'ixung tren <pn(i,k)=<pn(k,i). 2.1.3.3.Lamrol~itinhi~u(pre-emphasis) Tin hi~utruockhi du<;jcvaophanrichrheaphuongphapLPC phai thongquamQtbuocti€n xU'Iy d~lamr6 l(;licaedo(;lntinhi~ucobiendQ tha'p,caed~tinhnh~nd(;lngcuat'ansO'cao,vat'ansO'cobanFI, nghlala d'auvaocuabQphanrichLPC la: 84 yen)=Sell) - exS(n-l) Trongd6exlahflngs6lamratinhit$u,d6ngvaitronhu'mQtbQlQct'an s6.Ml,lcdichcilavit$clamra tinhit$ula giamthi~ucacmi€n c6sl,l'thay d6inhi€u (lamtrOllph6tie'ngn6i)bflngcachthemvaocacdi~mzerod~ din bflngnoic6v~chph6ye'udonhungamhUllthanhphatra tu thanh man.Vit$clamra tinhit$umQtcachg'andungda:bodi cacmi€n ph6ye'u vat~oracacformatsvoicacbiendQtu'ongtl,l'. 2.1.3.4.Doc 1u'Q'ngph6LPC Theodinhly Parsevalv€ tinhit$uroi r~c(16itinhit$uE(n» va phep bie'nd6iFourier,tac6[36][35]: 00 E= Ien2(n)= (Y~7r) tr ]E( e}OJ)12 dOJ n=-oo OJ=-tr Trong d6, E(n) c6 du'Qctu phep phan tich LPC cila tin hit$uSell) : A(z)=G/H(z),16ith~ngdu'cilatinhit$ula: G2E= - 2Jr ;r IS(elO1)12f I 2 dOJ O1=-;rH (elO1 )1 Cac ht$s6LPC thudu'Qcbflngcachlamq(c ti~uE. E>i€unaytu'ong du'ongvoivit$clamct!cti~ukhoangcachtrungbinhgiuaph6tie'ngn6iva ph6cilaLPc. Ph6cilaLPC IH(dffi)Ibi gioih~nbdidQIOncilaca'pptrongca'pchitie't cila ph6 ma n6 mo phongtrongIS(dffi)l.Hon QuaIS(dffi)1khongth~ chuy~ntaihoanroanph6cilaamhUllthanhvoi st!bie'ndQngnhanhdo t'ans6di€u boahaych~mdoca'utruccacthams6dinhd~ng. 85 2.1.3.5.Ciit cll'asf) Kkh thuocN cuacii'as6vaca'ppphaidu<;cchQnsaGchothaigiantinh toancuaht%sO'LPCla to'i1hi€u.Trangd6,p du<;cxacdinhb~ngdait'an cuatie'ngn6ivaconsO'naythuangcO'dinh.Chi c6N la c6th€ thayd6i d€ tacdQnglendQchinhxacvathaigiantinhtoancuaph6.Do dQmea cuacii'as6,nencii'as6tuongquailcuaLPC phaichliaitnha'thaidinhcua haichukys6ngamd€ uoclu<;ngph6chinhxac(thuangdQdaicuacii'as6 naytU20de'n30ms,d€ baadamdng c6it nha'thaichuky,k€ cat'ansO' FO). DQ chinhxac cuaph6 tyIt%thu~nvoi dQ Ion cua N. Ne'u chQnN qua ng<1nthl se g~pkh6 khanVI khongth€ dlf doandu<;ctin hit%utie'ngn6i hit%nthai VI phuongphapLPC la dlf baatin hit%utie'ngn6i t9-ithai di€m hit%nt9-itup tinhit%utruocd6. Phuongphapphan tkh LPC du<;cthlfchit%ntheotungchuky dinh (nghiala m6ifanN hayN/2 milutrang1khO'i).Di~unaylamgiamslf uoclu<;ngph6khitrangcungmQtkhungN c6slfb<1td'aucuamQtchuky moivava'nd~trdnentr'amtrQnghonkhiN nhc>.Sii'dl:mgcii'as6hinhchIT nh~td€ uoclu<;ng16itinhit%ub~ngphuongphaptheotungchuky dinh thuanggayra nhITngbie'ndQngba'tthuangkhi uoclu<;ngph6va kich thuoccii'as6thayd6ituongling.Trongthlfcte',d€ giaiquye'tva'nd~nay, nguaitadungcaccii'as6 lamtrOlltrongxii'ly tinhit%u(nhuHamming window)d€ tioclu<;ng16i,bu 19-iphuongphaplamtangthaigiantinh toancuachuangtrlnh. 2.1.3.6.Ke't lu~n Ly thuye'tdlfbaamah6atuye'ntinhdu<;cdungtrangxii'ly tie'ngn6ida nhi~unam.Trangchuangtrlnhnaychi trlnhbayap dl;mgcuaphuong phapLPC trongnh~nd9-ngtie'ngn6i.SaildayIamQtsO'1ydo thu~ntit%n maphuongphapLPC trdthanhmQtphuongphapto'tnha't: LPC la phuongphapto'td€ mo hlnhtinhit%utie'ngn6i.D~cbit%tla ph6 LPC baatrumcavungduangdilnam,dO'ivoi amvo thanhthlLPC khong c6thu~nl<;i,tuynhienvilndaplingyetic'aunh~nd9-ng. I 86 Phuongphapphantkh LPC bi€u diSnduQcmQtcachtie'tkit%mva phanbit%tcacamtuvungduongd§nam. PhuongphapLPC la mQtphuongphapphantkh tuongd6idongian, khathid6ivoiph'anclingL§nph'anm~mvachorake'tquakhaquailhon cacphuongphapkhac. 2.2.>Gidi thi~uv'eki~ntrueeuaSAPI 2.2.1.>SAPI CffpCao Cac dichvt;1SAPI ca'pcao(high-level)chophepchungta truyxua't de'ncac chlic nangco ban tronglanh vlfc nh~nd~ngtie'ngnoi(speech recognition)va text-to-speech.Nhungdichvt;1nayra'tthichhQpchovit%cxay dlfngcaclingdt;1ngc'antinhnangkichho~tmenuhaycacbuttonsbiingtitrlg noihaytinhnangchuyindillmQtchu6iwInbanthanhgiQngnoi. Giao tie'pSAPI ca'pcaoco 2 d6i tuQngchinh- MQtla d6i tu'QngVoice Commandh6trQcaedichvt;1lienquailde'nnh~nd~ngtie'ngnoi,vahaila d6i tuQngVoiceTexth6tro.ccacdichvt;1lienquailcte'ntext-to-speech. 2.2.1.1.VoiceCommand VoiceCommandObject Voice Menu #1 Voice Menu Collection Objects VoiceMenu Objects 87 ,D6i tuQngVoice CommandduQcdungd€ tung capcac dichv1,l v'enh~nd'.lngti€ng noi. D6i tuQngVoice Commandco mQtd6i tU<;1ng con la d6i tU<;1ngVoice Menu va mQtd6i tU<;1ngCollectionla mQtt~p h<;1pcacd6i tU<;1ngmenu") D6itu<;1ngVoiceCommandh6tr<;13giaoti€p (interfaces): . Giaoti€p VoiceCommand . Giaoti€p Attributes . Giaoti€p Dialogs Giao ti€p VoiceCommanddU<;1Cdungd€ li~tke, t'.lOva xoa cac d6i tu<;1ngmenu.Giao ti€p nay con dU<;1cdungd€ dang ky mQtling dl;mgd€ dungSR (SpeechRegconition)engine.MQt ling d1,lngphai hoan tat thanhvit%cdangky truockhi SR engineco th€ dU<;1cdung. Phuongthlic Mimic du<;1cdungd€ phat l'.li mQtvoice commandtho engine va "noi " cac voice commandsmQtcach tnfc ti€p tho SR engIne. Giaoti€p Attributesdu<;1cdungd€ d?tvadQcmQtsO'cactham s6d6di'eukhi€n mQtht%th6ngvoicecommand.Ta coth€ lamthocac voicecommandscohaykhongcohi~uhfc,thi€t l~pch€ dQho'.ltdQng cuaSR vadi'eukhi€n thi€tbinh~p(microphonehaytelephone). Giaoti€p Dialogstho chungtadungmQtsO'cachQphQitho'.li chminthovit%ccaid?tvahi€n thithongtincuaSRengine. DialogBox AboutBox Di€n giai DuQcdungd€ hi6nthi dialogbox chI dinhSR enginevahi€n thicacthongtin v'ebanquv'en. CommnadVerification Du<;1cdungnhuIa mQtWindowpop-up trongmQtphiennh~nd'.lngti€ng noi. DU<;1cdungd€ truyxua'tmQtcacht6ng quatd€n caccaid?tcllaSR enginenhu speaker,cac thamsO'di'eukhi6nvit%c nh~nd'.lng. Dungd€ thavd6i cachvhatam cactu GeneralDialog LexiconDialoO" I 88 vt,lng(vi dl;lnhuSt,lthayd6i amvi), them \ I havxoacact~ptintuvt,lng. D6itu<;5ngVoiceMenuchila d6itu<;5ngconcuad6itu<;5ngVoice Command.No du<;5cdungdechophepcaclingdl:mgdinhnghIa,them va xoacacvoicecommandstrongQtmenu.Ta clingcothedungd6i tuQngVoiceMenudekichho~thaykhlikichho~tcacmenusvacung ca'pmQtrainingdialogboxchomenu. D6i tuQngCollectionchliamQtt~ph<;5pcacd6i tuQngmenuduQc dinh nghIatrongCSDL Voice Command.MicrosoftSAPI dinh nghIa cac chlic nang de chQnva sao chep cac menucollentionsdung bCii voicecommandspeechengine. Trongquatrlnhdangky ling dl;lngde dungd6i tu<;5ngvoice command,mQtSt,lkhaibaacallbackduQcthietl~p.Callbacknh~ncac thongdi~pmakhongquantamdenho~tdQngcuaSR engine.Cac thongdi~ptieubieu.duQcgCiirangoaibCiiSRengineg'Omcackhaibaa maenginediiphathi~nracaccaunoimakhongnh~nd~ngdU<;5c. 2.2.1.2.VoiceText Dinh nghIadichVl;llienquaildenliinh vt,lCtext-to-speech.Dich Vl;lnay chi co mQtd6i tu<;5ng- d6ituQngVoiceText.D6i tu<;5ngnayh6 tr<;53 giaotier : . Giaotitp VoiceText. . GiaotitpAttributes. . GiaotierDialogs. GiaotitpVoiceTextlagiaotierchinhyeutrongliinhvt,lCText- To-Speech(TTS).Giao titp naycungca'pcacphudngthlicde khCii dQng(start),t~mdung(pause),titp wc l~iCivi tri t~mdung(resume), ch~ytoi(forward),quaylui (rewind)vadung(stop)TTS enginetrong hiedangdQcchu6ivanban.Giaotier VoiceTextclingduQcdungde dangky lingdl;lngmu6nsITdl;lngcacdichVl;lTTS.MQtlingdl;lngphai hoanta'thanhcongSt,ldangkytruockhiTTs enginecotheduQcdung. 89 Chilcnangdangky naycoth~gdimQtcontrachi de'nmQtcallback functiond~biltcacthongdit%p(messages)voicetext. Giaotie'pAttributeschopheptruyxu{tde'ncaccaid?td~di~u khi~ncachho~tdQngcuaTIS engine.Vi dl,lnhu'caid?taudiodevice, d?tto'cdQphatl~i(sO'tutrongmQtphut),b~ttiltcacdichVl,lv~tie'ng noivachQnche'dQnoicuaTTS. Giaotie'pDialogschophepngu'oidungcokhanangd~tvadQc cacthongtinlienquailde'nTTS engine.NQidungva d~ngtrlnhbay chinhxaccuacacdialogboxkhongdu'ejcxacdinhbdiMicrosoftma bdinhaphattri~nTTS engine. 2.2.2.>SAPI ca'ptha'p CacdichVl,lSAPI c{pth{pcungc{pd'ayduhancacdichvl,llienquail de'nv{nd~nh~nd~ngtie'ngnoivatext-to-speech.Bay la ca'pthichhejpnh{t chosl,l'caid?tcacdichVl,lcaoc{pv~nh~nd~ngtie'ngnoivatext-to-speech. 90 Dialog Din giai AboutBox B hin thi dialogboxchi dinh TIS engineva thongtinv ban quyn. LexiconDialog Dungd thaydO'icachphcitam cactu vl,l'ng(vi dl,lnhu'sl,l'thay d6iamvD,themhayxoacactp tintuvl,l'ng. GeneralDialog Hin thithongtinchungv TTS engine,vi dl,lnhu'to'cdQdQCva nhungcai dt khach6 trejcho TIS. TranslateDialog Cho ngu'oidungkha nangthay d6icachphatam. 2.2.2.1.Nh~nd~ngtie'ngnoi(SpeechRecognition-SR) D6i tU<;1ngSpeechRecognitionco nhi'eud6i tuQngcon va nhi'eu collections.Co hai d6i tu<;1ngchinhtrongmOth~th6ngSR: D6i tU<;1ng SR EngineEnumeratorva d6i tu<;1ngSR Sharing.Hai d6i tU<;1ngay dU<;1Ct<;lOb~ngcachdungnhunggia tfi CLSID-class ID duynha't.Cong dl,mgcua hai d6i tu<;1ngay la cling ca'pcho chuangtrlnh ling dl,mg thongtin v'eca~SR enginesvachopheplingdl,mgdangky voi engine trnchh<;1p.MOt khi engineda:duQcchQn,mOthay nhi'eud6i tU<;1ng grammarco the du<;1ct<;lO,va mOtd6i tU<;1ngSR Resultsdu<;1ct<;lOcho m6i C1,1mtu.D6i tu<;1ngay la mOtd6i tu<;1ngt<;lmthai chlia chi tie'tv'e Cl,lmtub~tdU<;1cbdiSR engine. Khi mOtSR enginedU<;1ct<;lO,thlmOtm6ilienke'tde'nthie'tbi thuamthanhclingdu<;1ct<;lo.M~cnhienthl thie'tbi thuamthanhla microphonenhungclingcothela telephone. SR Engine Enumerator CLSID Grammar Object SR SharingObject CLSID SR EngineModeEnum /SRFind ISREnum::Select SelectedSR Engine SR Results Object ISRCentra/::GrammarLoad ISRG ram Notify Sin k::PhraseF inish .Dol tu'qngSR Enumerator va Engine Enumerator Vai tracuaSREnumeratorvaEngineEnumeratorla xacdinhva chQnmOtSR enginethichh<;1pchos1,1'yeticftucuachuangtrlnhling 91 dl;lng.B6'ituQngEnumeratorlit$tketit ca.cacche'dQnh?nd<;lngtie'ng noikhadl;lngvacacenginesda:caid~ttuongling.ThongtinnayduQc rung rip bdi d6'ituQngcon cua d6'ituQngEnumerator:d6'ituQng EngineEnumerator. B6'ituQngEnumeratorvaEngineEnumeratorh6trQ2 giaotiSp . GiaotiSpISREnumduQcdungd€ nh?nmQtdanhsachcacengines khadl;lng. . GiaotiSpISRFind dungd€ chQnenginemongmu6'n. .Dol ttiQ'ngSR Sharing B6'itU'Qngnaychico mQtgiaotiSplaISRSharingd€ dinhvi va chQnmQtd6'ituQngenginemanosechiasevoinhi"eulingdl;lngtren mQtPc. Bi"eunayrho phepSlfdangky cualing dl;lngvoi mQtd6'i tuQngSR server. .Dol ttiQ'ngSR Engine La traitimcuaht$th6'ngnh?nd<;lngtiSngnoi.B6'ituQngnay h6 trQnhi"eugiaotiSprho vit$cquailsat,di"eukhi€n cachanhdQngve tiSngnoi.SR engineduQct<;lOb~ngphuongthlicSelectcuagiaotie'p ISREnumcuad6'ituQngSREnumerator. B6'i tuQngnayclingrungrip Slfkhaibaagiao tiSpcallback (ISRNotifySink)d€ b~tcacthongdit$pgdibdiengine.Cacthongdit$p nayco th€ dungd€ ki€m tratr<;lngthaithlfchit$ncuaengineva rung rip thongtinphanh5irholingdl;lngd€ giatanghit$unangho<;ltdQng cuaht$th6'ng. Ten GiaoTie'p ISRCentral Diin ghli Bay la giaotiSpchinhrho d6'ituQng SR Engine.Chophepn<;lpVaGva la'y ra bQvan ph<;lm,ki€m tra thongtin tr<;lngthaicuaengine,vadangky hay giaiphongslf khaibaaCallbackcua engIne. 92 ISRDialogs DungdehienthicachQphQitho~dcho phepnguoidungd~tcacthams6cila enginevadehua'nluy~ndetanghi~u nangnh~nd?ngchoengine. Be d~tva nh~ncacthuQctfnhco ban nhutenvakieucilathie'tbinh~p,di'eu khienamluQng,... Cho phepnguoidungquan19danh sachcac speakerdungcho engine. Giaotie'pnayd~tbi~tcogiatrikhi co nhi'eunguoidungcungmQthie'thi. Giao tie'pnay cling ca'pcho nguoi dungtruyxua'tde thayd6i cachphat amhayphat1?inhungtuC1,lthetrong bQ tu v1,1'mr. ISRAttributes ISRSpeaker ISRLexPronounce .D6i ttiQ'ngGrammar B6i tuQngGrammarla mQtd6i tuQngconcila d6i tuQngSR Engine.No duQcdungdetaithongtinvanph?mnguphapchospeech enginedungtrongvi~cphantfchamthanh/tie'ngnoi thauduQc.B6i tu'QngGramarchuata'tca nhungquylu~t(rules),nhungtu (words), danhsach(lists)va cacthams6khacdeSR enginethongdichtie'ng noiconnguoi.SR enginexli'19m6imQtc1,lmtu codungde'nthongtin v'evanph?mdaduQct,HVaG. B6i tuQngGrammarh6trQbagiaotie'p: . ISRGramCFG- Giaotie'pnaydungdedi'eukhiencacch((cnangvan ph~mv'evanph?mcontext-freenhuvi~cquan19cacdanhsach(lists) vacacquy1u~t(rules). . ISRGramDictation- Giaotie'pnaydungdedi'eukhiencacchuGnang vanph?mv'evanph?mchfnhta(dictation)nhutu (words),nhomtu (wordgroups)vacacvanbanm§:u. . ISRGramCommon- Giaotie'pnaydungdedi'eukhiencacGongvi~c chungchoca hai vanph?mcontextjreeva dictation.Bao g6mcac Gongvi~cnhutaiVaGva taira cacbQvanph?m,kfchho?thaykhu 93 kich ho(;ltbQvanph(;lmda:duQcn(;lp,hua'nluy~nchoengineva lu'ugill' cacd6i tuQngSR results. £>6ituQngGrammarclingh6 trQmQtkhai baacallbackd€ di~u khi€n cacthongdi~plien quailde'ncacsl!ki~nvanph(;lm. .D6i tu'qngSR Results £>6ituQngnaychuathongtinchi tie'tv~h'auhe'tcacsl!ki~n(event) lienquailde'nvi~cnh~nd(;lngtie'ngnoi,vi d\lnhuc\lmtuda:thongdich duQcxaydtfngbdiengine,tencuaspeaker,th6ngke hi~unangho(;lt dQng,... ISRResEval Di~nghii Cungca'pthongtin co banv~cac d6i tuQngresultsnhusl!bi€u di€n dudid(;lng amthanhcuamQtct,lmtu,bQvanph(;lm dungd€ phanrichcacd'auVaGva thai giankhdidQnghaycha'mdillcuamQtsl! ki~nnh~nd(;lng. £>€dQcsl!bi€u di€n amthanhcuamQt c\lmtUda:nh~nd(;lng.File amthanhnay co th€ duQcphatl(;lira speakerhaylu'u l(;liduOid(;lngfile .WAV d€ xeml(;lisau nay. £>6sinhra sl!bi6udi€n d6thi cuamQt sl!ki~nnh~nd(;lng.£>6thinaytrlnhbay nhungamvi dungd6xaydl!ngc\lmtu, trinhbayph'anloi cuaenginechovi~c hathi~nchinhxacct,lmtu,... Cungca'pmQtcohQichovi~cxacnh~n sl!thongdichla da:chinhxac,concho phepstf sua l6i trongqua trinhphan rich. Dungd6 danhgia l(;licacke'tquacua vi~cnh~nd(;lngtrudcdo.Phuongthuc naycoth6duQcdungbdiengined€ yeu c'auspeakerl~pl(;liquatrinhhua'nluy~n TenGiaoTiel ISRResBasic ISRResAudio ISRResGraph ISRResCorrection 94 ISRResSpeaker ISRResModifyGVI ISRResMerger . ISRResMemory vadungthongtinmoid6danhgial~islf' thongdichtruocd6. DuQcdungd~lamtanghi~unangho~t dQngcuaengineb~ngcachsosanhcac thongtinda:lu'utrutUnhungphienlam vi~ctHroCvoicunglo~ispeaker. Dungd6 clingca'pmQtcti'as6 pop-up yetic'aunguoixacnh~ns~ithongdich cuaengine.C6 th6clingca'pdanhsach catquachonguoidungchQn. Dungd6trQnduli~utu2 slf'ki~nnh~n d~ngkhacnhauthanhmQtdonth6don Ie chom1,lcdichluQnggia.Di~unayse lamgia tangtri thliccuah~th6ngv~ speakerhaycacc1,lmtu. D6 ca'pphatvagiaiph6ngbQnhodung b6icacd6ituQngresults. .N6ithemv'eGrammarRules: BQvanph~mcuaSR enginedi~ukhi6ncachSR enginethong dichtiengn6i.Grammardinhnghlanhungd6ituQngd6engineMng nghetrencacd6ituQngd6vadungnhungguylu~t(rules)d6phanrich cacd6ituQng.SR engineyetic'aumQthaynhi~uGrammarsphaiduQc n~ptruockhiSRenginec6th6nh~nd~ng. Mo hlnhSAPI dinhnghla3ki6uGrammars: . Context-freegrammars- CactuduQcphanrichdlf'atrencos6cac guylu~tv~Cllphap.Slf'thongdichdlf'atrencos6slf's<lpxepvathli tlf'cua cacd6i tuQngchli khongdlf'avaoynghlahayngucanhcua cacd6ituQng. . Dictationgrammars- CactuduQcsosanhvaobQtuvlf'ngIOnc6 mQtchud~da:duQcdinhnghlatruocva mQtlo~igiQngdQccho trudc. . Limited-domaingrammars- la slf' ket hQp cua context-free grammartrencos6cacguylu~tva dictationgrammartrenco s6 cactU. 95 Caequylu~tchoSAFI Context-FreeGrammar SAPI Context-FreeGrammar(CFO) ho~tdQngtrenmQtt~phC!p gioih~ncacquyIu~t.NhungquyIu~tnayduC!cdungderhEintich cacaudioinput.CacCPOsconchopheps1,I'dinhnghlacuanhung turiengIe.NhungtUnaytrdthanhmQtph'antrongbQvanph~mva co theduC!cnh~nd~ngriengIe haynhumQtph'antrongmQtquy Iu~t. Cachcqnhnghiacaetu trongCFG TrongSAPI CPOs,m6itudinhnghladuC!cgallmQtID duynha't. Vi dv: Lee=101; Scott=102; Michelle=103; Lu'u Y Ia chungta nengill chodanhsachtrongbQtu vl,l'ngcang ng~nGangt6t. Cachcqnhnghiacaequylu~ttrongCFG Cungvoi cacturiengIe, CFO conc'ande'ncacquyIu~tde thong dichtie'ngnoi.M6i quyIu~tg'Om2ph'an- Tenlu4tvadaycaethao tacdtnhnghlalu4t. =[seriesofoperations] Ta cothegQimQtIu~tkhac,lit$tket~phQpcactucothenh~nd~ng duC!chaythamchie'ude'ndanhsachcactli'bell ngoai.Clingco nhunghamd~cbit$tdinhnghlachocacCPOs: . altO:dungdelit$tket~phQpcacinputs. . seqO:dunghamnaydechir5choSRenginethlitl,l'xua'thit$nd d'auvao. . repO:dunghamnaydebaachoSR enginetunayhayIu~tnay seduC!cI~pI~inhi€u I'an. Vi dv : . =alt( Scott Wayne Curt )alt; . =alt( 96 Scott seq(Scott Wayne seq(Wayne Ivey)seq Ivey)seq )alt; . =alt( seq(Dial rep( )alt; =alt( zero )rep)seq one two three four five SIX seven eight mile )alt ; Mftuttfphienamqu6cte'(InternationalPhoneticAlphabet- IPA) Nhii'ngh~th6ngnh~nd:~lllgtie-fignoi co h6 trQIPA secho phepngu'oidungnh~pmaIPA vaobQtuv1!ngnhu'la cachd';lycho h~th6ngcachphcitamcactu.NhungmaIPA naydu'QcdungdSso khop cacamthanhdl1uvaovoicactudu'Qchill trongbQtuv1!ng cuaenginedodolamtanghi~unangcuaquatrinhnh~nd';lng. Du'oidayla danhsachcacIPA cuacacph\!amva nguyen amtie-figAnhtu'onglingvoicacgia1:IiUnicode: 97 NguyenJ Vi dQ. Unicode PhQ.Am B Big, able,tab U+OO62 Ch Chin,archer U+OO74U+O283 D Dig, idea U+OO64 F Fork,after U+OO66 G Gut,angle U+O261 98 H Help, ahead U+0068 J Yoy, edge U+0064U+0292 K Cut,take U+006B L Lid U+006C M Met, amid,aim U+006D N No, end,pan U+006E Ng Sing,drink U+014B P Put,open,tap U+0070 R Red,part,far U+0072 S Sit,cast,toss U+0073 Sh She,cushion U+0283 T Talk, sat U+0074 Th Thin, truth U+03B8 Dh Then,father U+OOFO V Vat, over,have U+0076 W With,away U+0077 Z Zap,lazy U+007A Zh Measure U+0292 A At, carry,gas U+00E6 Ate, day,tape U+0065 Ah, car,father U+0251 E End,berry,ten U+025B Eve, be,me U+0069 I Is, hit, lid U+026A Ice, bite,high U+0061 U+026A a Own,tone,go U+006F Look,pull,good U+028A Tool,crew,moo U+0075 Oil, coin,toy U+0254 Out,how,our U+0061U+028A U Up,bud,cut U+028C Urn,fur,meter U+025A Y Yet,onion,yard U+006A .D6i ttiQ'ngSR Results E>6itu<;fngnay chuathongtin chi tie'tcho h'auhe'tcac slf ki~n lien quailde'nnh~nd~ngtie'ngnoi.Vi dl;!nhuslfbi~udi~ntie'ngnoi da: du<;fcthau,cl;!mtuda:du<;fcthongdichdu<;fcxaydlfngbdi engine,th6ng ke hi~unang,... 2.2.2.2.Text-to-Speech Cac dichVl;!text-to-speechca'ptha'pdu<;fccungca'pbdi mQtd6i tu<;fngchinh la d6i tu<;fngTTS Engine. Cling gi6ngnhu t~pcac d6i tU<;fngSR, t~pcac d6i tu<;fngTTS cling co d6i tu<;fngEnumeratorva Engine Enumerator.Nhil'ngd6i tu<;fngnay du<;fcdung d~dinh vi va chQnmQtd6i tu<;fngTTS Engineh<;fpl~. Cac dichVl;!TTS clingco dungmQtd6i tu6i tu<;fngm~cnhienchooutputla loamaytinh(PC speaker). ITTSEnum::Find TIS Engine Enumerator CLSID TIS Enumerator MM AudioOutput ITTSFind:: Select CLSID .D6i ttiQ'ngTTS Enumerator va Engine Enumerator Cae d6i tu<;fngnay dungd~nh~nmQtdanhsachcac TTS engineskhi dl;!ngcungvoicacche'dQdQccuachung.Cahaih6tr<;fhai giaotie'p: . ITTSEnum- dungd~nh~nmQtdanhsachcacTTS engineskha dl;!ng. 99 . ITTSFind- dungdSnh~nmQtcontrochid€n TTS engineyeti c'au. .D6i tu'qngTTS Engine Day la dO'ituc}ngchinhcuacacdichVl,lTTS SAPI ca'ptha'p.DO'i tuc}ngTTS Engine h6 trc}nhi'eugiao ti€p ITTSCentral, ITTSDialog, ITTSAttributes. DO'ituc}ngnayconh6trc}haikhaibaacallbacks . ITTSNotifySink - dungdS gCJcac thongdi<$pling dl,lnglien quaild€n vi<$cphath;ti(playback)vanbannhuaudiooutput,nhu' startvastopplayback. . ITTSBllfNotifySink- dungdS gCJicacthongdi<$plien quailcte'n tr:;tngthaicuavanbantrangplaybackbuffer. 2.3.>Caeva'nd'eky thu~tedbantrongnh~nd:;mgtie'ngnoi C6 3ye'uto'kythu~tdSdanhgiatronglanhvl,l'cnh~nd:;tngti€ng n6i: . TrichchQntu. . Tinhphl,lthuQcVaGgiQngnguoidQc. . Phantichtu. Trich cht;mtit la quatrlnhlamthe'naGdScamnh~nduQcmQtcach chinhxactungtumQtCJd'auVaG.Ba'tkymQtSRenginenaGclingphai c6mQtphuongphapdSl~ngngheCJd'auVaGvaquye'tdinhkhi naGla k€t thucmQtu.C63phuongphapdSgiaiquy€tva'nd'enay: . Tach tung tie'ngrieng bi~t. . Tach tungCl,lmtu. . Dl,l'aVaGcamQtCalin6i lien tl,lc. Phuongphaptachtitngtiengriengbi~tla d:;tngtrichtitdongian nha't.Trangphuongphapnayengineyell c'aumQtkhoangl~nggifi'a m6itu.Da'ul~ngnaydanhda'uvi tri b~td'auvake'tthuccuam6itu. Phuongphapnaykhongdoihoitainguyenmaytinhnhi'eu.Tuynhien theophuongphapnaythlgi<;mgn6ira'tlakhongtlfnhien., 100 TrangphuongphaptachtitngCl;lmtu:thlspeechenginesel~ng nghemQtchu6icactutudongamthanhnh~pVaG.Theophuongphap naynguaidungsen6imQtcachtl1nhienbon,vadayclingchinhla uu di~mcilaphuongpharoNhungye'udi~mcilan61ad~nh'aml~n. Phuongphapthli badl1aVaGnguyendiu noi lien tl;lcla phuong phapcaoc:ipnh:itchovi<$ctrichchr;mtit.Trangphu'ongphapnay SR enginec6 g~ngnh~ndi;lllgm6i tu theothai gian thl1c.Do d6 phuong phapnaysedoihoi tainguyenmaytinhra'tnhi~u. Qua trlnhtrichchr;Jntitn6i trenl<;liclingbi anhhudngnhi~uVaG giQngcila nguaidQc(speaker)- Tinh ph~lthui)cvitongltma(Jc.Tinh nangnay am chi de'nkha nangling xU'cila SR enginevdi cac giQng dQckhacnhau.Tren thl,tcte'thlc6nhungSR enginebi ph1,lthuQcgiQng n6i ma clingc6 nhungSR enginedQcl~pvdi giQngn6i. Ba'tti<$ncila nhungh<$th6ngph1,lthuQcgiQngn6i la t6nchiphi d~"hua'nluY<$n"cho h<$th6ngtrudckhi n6 du<;1ckhai thac vdi mQtnguai C1,lth~(vdi dQ chinhxac khoang90%).Cach<$th6ngdQcl~pvdi giQngn6i c6 khuye't di~mla doi hoi r:itnhi'eutainguyencila maykhi ho<;ltdQng. MQtkhi tu da:dU<;1ctrichra thl ke'de'nla n6phai dU<;1cphantich - Phiin tich tit. Ky thu~tnay la qua trlnhso khdp tungm1,lctu trich dU<;1cVaGdanhsachcac tu da:bie'tdu<;1chill tru s~ngtrongbQtu vl,tng cila SR engine.C6 2 phuongphap cho qua trlnh nay la : So kh6p nguyentit; vaSo khaptitcan (sub-word).Trong phuongphapso khap nguyentit, SR enginesokhdp tungm1,lctU trichdu<;1cvdi cac tu m§u trongkho tu vvng.£)i~mye'ucilaphuongphapnay la yell c'aulu'utnt bQtu vl1nglOll.M6i tuc6th~chie'mde'n512byteho~chonnU'a. Phuongphap so khdp tit can con gQi la so khap am vi (phonemes).Chungtabie'tr~ngm6ingonnguc6mQt~pcacamvi c6 dinhdU<;1cdungd~t<;lOnencactu.Nhu v~yb~ngvi<$cbaachoSR enginebie'ttrudcv~cacamvi vacachbi~udi~nchungthlenginese d~dangc6khanangnh~nd<;lngdU<;1cmQt~ph<;1pcactukhac.Phuong phapnaykhongdoihoibQtuvl,tngphailOll.HonnU'amQtthu~nlQi cilaphuongphapnayla sl,tphatamcilamQttuc6th~duQcxacdinhtu mQtchu6ivanban.Vi<$clu'utrucacamvi trungblnhchic'antu5de'n 101 20bytecho1mQtamvi.Ba'tlQichinhcuaphu'ongphapnayla doihoi nhi-eutainguyenmaytinhtrongquatrlnhphantich. 3.>Mo hinhdli dat H~th6ngsti'dl,mgsl,l'tu'ongtaccua4d6ituQngchinhnhusau: .DOLtl1lJngInputMedia Dien giai : B6i tuQngnaybieuthichothitt bi dungdenh~ptitng n6ic'annh~nd~ng. Thanhph'andli lieu: 1.Toc_Do : 2.KQ: 3.TB_Nhap: T6cdQnh~pchophep. Chu6iamthanhktt quanh~p. Lo~ithie'tbinh~p. Cacphuongthuc: 1.Khoi_Tao() : 2.Bat_Dau(): 3.Ket_Thuc(): 4. Dung() : 5. TT() : 6.Lay_KQ() : Khdit~od6ituQngInputMedia. B~td'auquatrlnhthutitng. Ktt thucquatrlnhthutie'ng. T~mdungquatrlnhthutitng. Titp tl;lcquatrlnhthutitng t~i truocd6. La'ychu6iamthanhktt qua. diem t~mdung .Do'itl1lJngSREngine : Diengiai : Bay la d6i tuQngdamnh~ntinhnangnh~nd~ngtitng n6i. Thanhph'andli lieu: 1.Doi : 2.Min_Nhieu: 3.Nguoi_Doc : 4. TG_Hoan_Tat: 5.Max_TG_Lang : 6.Max_TG_ND : Tr~ngthaiechotrendongamthanhdangnh~p. Gill giatridQnhieutha'pnha'tmaenginechophep tudongamthanhnh~p. Luugillthongtinv-enguaidQc. NguongthaigiangiUa2cl,lmtu. Khoangthaigiant6idacuamQtda'ul~ng. Thaigiant6idadeenginenh~nd~ng. 102 CORBAORB sO'ke'tquat6tnhit t6idaduQctrav~tuenginesail khinh~nd~ng. Ke'tquatrav~tuengine. Phuongphaptachtu. Phuongphapsokhop. B6i tuQngnh~pamthanh. B6i tuQngxuit ke'tqua. BQvanph~mdungtrongquatrlnhnh~nd~ng. Tinhphl,lthuQcgiQngdQc. 7.So_KQ_l .. 8.DS_KQ : 9.PP_TT: 10.PP_SK: 11.TB_Nhap : 12.TB_Xuat : 13.Grammar: 14.PT_Giong : Cacphuongthuc: 1.Khoi_Tao(): 2.Dung(): Khdi t~omQtd6i tuQngSREngine. T~mdungquatrlnhnh~nd~ng. 103 8Khoi3aoO InputMedia 8Khoi_TaoO OutputMedia 8BacDauO. 8 Bat_DauO 8KecThucO 0 Ket_ThucO 08DungO .DungO8TTO 8TTO 8 Lay_KQO 8 Khoi3aoO SREngine 8Tach_TuO Grammar 8 Dung() 8 So_KhopO 8TTO 0 8 Dlg_Day() DeactiveO 08 Mode_NDO8 LoadGrammarO 8UnLoadGrammar() 3. TT(): 4.Mode_ND() : 5.LoadGrammar(): 6. UnLoadGrammar(): 7. Tach_Tu(): 8.So_Khop(): 9.DIg_Day() : Tie'ptl;lcGongvi~cnh~nd<:ingd di~mt<:imdung. La'ythongtin lien quailde'nche'dQnh~nd<:inghi~n h?mh. N<:ipbQvanph<:imdungchoquatrlnhnh~nd<:ing. LO<:iib6bQvanph<:imdangdung. Tachtu. Nh~nd<:ing. Hi~nthi hQphQi tho<:iidungcho qua trlnh "d<:iY" choengine. .D[/i tz1(fngGrammar: Di~ngiai : E>6ituQngnayd<:iidi~nchobQvanph<:imdin dungtrongquatrlnhnh~nd<:ing. Thanhph'andli lieu: 1.Ten_tt: CacphuongthUG: 1.KhoCTao() : 2.Active: 3.Deactive: 4. Them_Tu(): 5.Xoa_Tu() : 6. Tim() : Ten t~ptinvanph<:im. Khdi t<:iOd6i tuQngGrammar. Kich ho<:itbQvanph<:im. Khtl'kichho<:itbQvanph<:im. Themtu moivaobQvanph<:im. X6a mQtturakh6ibQvanph<:im. TIm Ide'mmQttutrongbQvanph<:im. .Doi tz1(JngOutputMedia: Di~ngiai : E>6ituQngnaybi~uthichothie'tbi dungd~xua'tke'tquanh~nd<:ingra thie'tbi xu<l'ttuongung. Thanhph'andli lieu: 1.Toc_Do : 2. Cao_Do.. 3. TB_Xuat: CaephuongthuG: 1.KhoCTao(): T6c dQphatl<:iiamthanh. CaodQcuaamthanhkhi phat. Lo<:iithie'tbi xua't. Khdi t<:iOd6i tuQngOutputMedia. 104 2.Bat_Dau(): B~tdilllquatrlnhxua'tchu6ivanbanfa thi€t bi xua'tu'ongung. K€t thuGquatrlnhxua'tchu6ivanbanhi~nthaifa thi€t bixua't. T<;lmdungquatrlnhxua'tvanbanfa thi€t bixua't. Ti€p tlfcquatrlnhxua'tchu6ivanbant<;lidi€m t<;lm dungtfu'OCd6. 3.Ket_Thuc(): 4.Dung() : 5. TT() : 4.>Huang phat tri~n K€t hQpvoi cacdO"itu'Qngv'eTAPI d€ nh~nd<;lngchITselquaelngnghedi~n tho<;li. NghienCUllphu'ongphapnh~nd<;lngrheangITamvathunghi~mvoimahlnh nh~nd<;lngHiddenMakovd€ nangcaotinhtv nhienchongu'aidQcva dQ chiIlhxacchophanh~nh~nd<;lngchITsO"(lenkhoang97%-98%va dQcl~p voigiQngn6i). 105