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NHÓM 5 ĐẠI HỌC GIAO THÔNG VẬN TẢI TP HỒ CHÍ MINH KHOA ĐIỆN - ĐIỆN TỬ VIỄN THÔNG HỆ THỐNG VIỄN THÔNG 2 ĐỀ TÀI: HỆ THỐNG TRUYỀN THANH VÀ TRUYỀN HÌNH 1. NGUYỄN NGỌC THUẤN 2. LÊ ANH KHOA 3. NGUYỄN THỊ HUỆ 4. NGUYỄN VĂN MẠNH 5. LÊ VĂN HIẾU 6. NGUYỄN KIÊN 7. PHẠM THANH SANG SVTH: TP HỒ CHÍ MINH - 03/30/2022 1

Nhom 5- Hệ thống truyền hình - truyền thanh.pptx

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I HC GIAO THNG VN TITP H CH MINHKHOA IN - IN T VIN THNGH THNG VIN THNG 2

TI: H THNG TRUYN THANH V TRUYN HNHNGUYN NGC THUNL ANH KHOANGUYN TH HUNGUYN VN MNHL VN HIUNGUYN KINPHM THANH SANG

SVTH:TP H CH MINH - 11/1/20151NHM 51K HOCHNI DUNGC s k thut.HT truyn hnh trng en.1. HT truyn hnhHT truyn hnh s.HT truyn hnh mu.HDTV.Nn video.11/1/20152Thng tin v tuyn.K thut iu ch.My thu pht thanh.2. HT truyn thanhNHM 52K HOCH11/1/201531 C s k thutHT Truyn hnh.nh sng, mu sc.S pha trn mu.Truyn tn hiu.2 HT truyn hnh trng enNguyn l truyn hnh.My thu hnh en trng.3 HT truyn hnh muK thut.Nguyn tc.Qu trnh iu ch v pht THc im ca sng truyn hnhNTSC, PAL, SECAM.4 HT truyn hnh s4.1 HDTV4.2 Nn videoTruyn hnh s.K thut bin i s.Tiu chun TH S.TV trung thc cao.Chun studio.Truyn dn.

VIDEO S.M ha Run Length.N Tn hiu.M ha c iu kin. Phn 1. HT truyn hnh.NHM 5K HOCH11/1/201542 K thut iu chTruyn sng.Di tn s truyn thanh.iu ch FM, AM.Phn 2. HT truyn thanh.3 My thu pht thanh1 Thng tin v tuynMy thu / pht FM, AM.NHM 5PHN CHIA CNG VICK hoch: Chia lm 2 phn chnh cho 2 nhm.Mi nhm t tm ti liu, hp nhm.Tng hp, i n thng nht, tng kt slide, mi thnh vin vit bo co tm tc tng phn ring l mnh lm.Vit bo co tng kt.11/1/20155Phn 1. H thng truyn hnh:1. Nguyn Th Hu2. L Anh Khoa3. Nguyn Vn Mnh4. Nguyn Ngc ThunPhn 2. H thng truyn thanh: 5. L Vn Hiu6. Nguyn Kin7. Phm Thanh Sang

NHM 5PHN II11/1/20156 H THNG TRUYN HNHNHM 56NI DUNG11/1/20157GII THIULch s hnh thnhTnh cht muTo tn hiuTH TRNG ENNguyn l qut nhS khi phtS khi thuTHSH truyn hnh HDTruyn hnh KTSTH s mt t DVB-T2THMUGii thiu chungChuyn i tn hiuTruyn tn hiunh nghaNHM 5PHN 1 H THNG TRUYN HNH11/1/201581Gii thiu

Truyn hnh ( TV television) l phng php to li cc hnh nh ng yn hoc chuyn ng, bng cc tn hiu in t. Truyn hnh: n bao gm tp hp nhiu thit b in t. Truyn dn tn hiu in mang hnh nh v m thanh c m ha, c pht di dng sng v tuyn hoc thng qua h thng cp quang, hoc cp ng trc t ni ny n ni khc.

NHM 5PHN 1 H THNG TRUYN HNH11/1/20159TRUYN HNH C HCTRUYN HNH IN T

1.1Lch s hnh thnh.NHM 5PHN 1 H THNG TRUYN HNH Nm 1885:Paul Gottlied Nipkow (c) sng to ra h thng Tivi c in t u tin, c th quay v chuyn i hnh nh thnh cc chm im11/1/201510

1.1Lch s hnh thnhNHM 5PHN 1 H THNG TRUYN HNH Nm 1927: Mt nh khoa hc tr ngi M c tn Philo Taylor Farnsworth, pht trin thnh ng tia cc m, mt pht minh quan trng trong vic pht tn hiu in t11/1/201511

1.1Lch s hnh thnhNHM 5PHN 1 H THNG TRUYN HNH Nm 1930:c xem l nm bt u cho k nguyn ca truyn hnh vi vic xut hin nhng chic tivi thng mi nh EMI- Marconi v Baird vi hai h thng tn hiu 240 dng qut v 405 dng qut Bui pht sng u tin ca k nguyn truyn hnh c ghi nhn vo thng 8 nm 1936 trong khun kh th vn hi Olympic Berlin

11/1/201512

1.1Lch s hnh thnhNHM 5PHN 1 H THNG TRUYN HNH Nm 1938, George Valensi a ra tng pht sng truyn hnh mu Nm 1939, thit b truyn hnh mu ra i Nm 1949, qua nhiu cuc th ngim, M sn xut thnh cng chic my thu hnh mu u tin Ngy 1/1/1945, bui pht sng truyn hnh mu u tin c pht sng ti M

11/1/2015131.1Lch s hnh thnhNHM 513PHN 1 H THNG TRUYN HNH11/1/201514

1.1Lch s hnh thnhNHM 5PHN I H THNG TRUYN HNH11/1/201515

?Lm th no truyn hnh nh chuyn ng?NHM 5PHN I H THNG TRUYN HNH truyn tn hiu truyn hnhTN HIU QUANG (hnh nh ng) TH IN (TH HNH NH video)TH M THANH MY PHT iu ch bng sng cao tn cc ngn (SNG MANG) (Gi chung l tn hiu truyn hnh) c bc x di dng sng in t qua khng gian hoc truyn bng cp n my thu11/1/2015161.2Tn hiu truyn hnhNHM 5PHN I H THNG TRUYN HNH Mi hnh nh c camera trung tm truyn hnh phn tch thnh khong 520.000 phn t rt nh (gi l im nh)Cc im nh mang thng tin v chi v mu sc ca vt Camera bin i sng ca tng im nh thnh tn hiu in c bin in p t l vi sng (nh b bin i quang in). l qu trnh phn tch nh i pht11/1/2015171.2Tn hiu truyn hnhNHM 5PHN I H THNG TRUYN HNH chi (luminace)11/1/201518380nm780nmBin trung bnh(Cng sng) chi l p ng ca mt vi bin trung bnh ca ton phLam da1.3Tnh cht mu Mu en v phng din nh sng c xem l mu trng c cng chiu sng thp di kh nng kch thch ca mt Mu sc ca vt khng ch ph thuc vo tnh cht phn x ca n m cn ph thuc vo ngun chiu sng ln vt Khi ph phn b nng lng ca ngun chiu sng thay i th mu sc ca vt c chiu sng cng thay i. V d khi chiu nh sng mu ln vt phn x mi bc sng ta thy vt c mu ging mu ca ngun sng

NHM 518PHN I H THNG TRUYN HNH bo ha: s tinh khit ca mu y vi mu trng, l kh nng mu y b pha long bi nh sng trng nhiu hay t. Ngun n sc c bo ha tuyt i v khng b nh sng trng ln vo. Ngun sng trng c bo ha bng 0 v xem nh b nh sng trng ln vo hon ton. Mu bt k = Lng sng trng + Lng sng mu

11/1/201519

380nm780nm380nm780nm380nm780nm = +S biu din bo ho

1.3Tnh cht muNHM 5PHN I H THNG TRUYN HNH11/1/201520

Sc thi (Hue, Tint): hon ton l cm gic ch quan ca con ngi. Thng sc thi quyt nh bi bc sng ln lt nht trong ton ph. Cng mt mu chng hn nhng mi ngi cm nhn sc thi c th khc nhau.

1.3Tnh cht muNHM 5PHN I H THNG TRUYN HNHnh sng v phng din vt l khch quan ch l sng in t c tn s t 3,8 x 10^14 n 7,8 x 10^14 Hz, hay c bc sng t 380nm n 780nm nh vy nh sng ch chim mt khong rt hp trong di sng in t, di ta gi l ph nh sng.11/1/201521

1.3Tnh cht muNHM 5PHN I H THNG TRUYN HNH Tt c cc mu u c th c to ra t 3 thnh phn mu c bn R,G,B bng cch trn chng theo mt t l thch hp Vic chn cc mu c bn cn phi tho mn iu kin:Trn 2 mu bt k trong 3 mu c bn s khng cho ra mu c bn th 3Ta c th c v s tp ba mu c bn nhng cn lu l, nu nh hai trong s 3 mu c bn nm cui hai u vng nhn thy, cn mu c bn th ba nm gia th c kh nng d dng to li phn ln cc mu tn ti trong thin nhin11/1/2015221.3Tnh cht muNHM 5THUYT 3 NU22PHN I H THNG TRUYN HNH (Red) = 700nmL cy (Green) = 546,1nmL (Blue) = 435,8nm11/1/201523

1.3Tnh cht muNHM 5PHN I H THNG TRUYN HNH11/1/201524

?To tn hiuNHM 5Lm th no chuyn hnh nh thnh tn hiu.24PHN I H THNG TRUYN HNH11/1/201525

1.4To tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201526 Ngi ta khng truyn ton b bc hnh m truyn ln lt tng dng t trn xung di nh ta c mt quyn sch. Mt bc hnh c chia lm 625 dng qut t trn xung di, sau truyn i tn hiu ca tng dng qut n my thu vi tc 15625 dng/giy, my thu ti to li c hnh nh c th cng phi qut li 625 dng cho mt mn nh v cng phi qut vi tn s 15625 dng/giy, qu trnh ny gi l ng b gia tn hiu thu v pht.1.4To tn hiuNHM 5PHN I H THNG TRUYN HNHQut thun

nh gcnh ti toHng qut ngangdc271.4To tn hiu11/1/2015NHM 5

Dng qut thunim qutQut ngc nhPhng php qut lin tcPHN I H THNG TRUYN HNH11/1/2015281.4To tn hiuNHM 5

2468

Mnh chnMnh l1357

291.4To tn hiu11/1/2015PHN I H THNG TRUYN HNHNHM 5PHN I H THNG TRUYN HNH vic qut tt c cc my thu ng b so vi i pht, ngoi tn hiu hnh nh, i truyn hnh cn pht thm nhng tn hiu iu khin vic qut mi dng, mi mnh cho ng (gi l tn hiu ng b ngang v dc) ng thi cng pht nhng tn hiu xo du tt cc tia qut ngc my thu khng lm l ra nhng vt trng trn mn hnh; gi l nhng xung xo hi ngang (xung tt dng) v hi dc (xung tt mt)11/1/2015301.4To tn hiuNHM 5Qut ngang (H = Horizontal):THTH bng mt chu k qut ngang1 bc nh c 625 TH1 giy c 25x625 = 15,625THtn s qut ngang l:fH = 15.625 Hz.311.4To tn hiu11/1/2015PHN I H THNG TRUYN HNHNHM 531NHM1CNG NGH PHT THANH TRUYN HNHQut dc:32Qut thun dcQut ngc dc1 giy c 50 chu k qut dctn s qut dc l: fV = 50 Hz1.4To tn hiu11/1/2015PHN I H THNG TRUYN HNHNHM 5Xung ng b ngang ( H synchronous):33Tn hiu videoK+12VCun li tia ngang (Yoke ngang)Mch to rng ca qut ngang1.4To tn hiuPHN I H THNG TRUYN HNH11/1/2015NHM 5PHN I H THNG TRUYN HNHXung ng b dc ( V synchronous):

34Tn hiu videoK+12VCun li tia dc (Yoke dc)Mch to rng ca qut dc1.4To tn hiu11/1/2015NHM 5PHN I H THNG TRUYN HNH11/1/201535

?NHM 5PHN I H THNG TRUYN HNH truyn nh ng, video, ta "chiu" nhiu anh tinh lin tip theo phng phap trn vi tn s tng i ln (trn 50 hinh/giy), mi anh cha mt pha cua hinh anh chuyn ng

Tn s nh c la chn p ng hai yu cu:To cm gic v qu trnh chuyn ng lin tc ca nhnh ng ti to trn mn hnh khng b chp11/1/2015361.5Truyn tn hiuNHM 5

tRi rc hnh nh trong min thi gianPHN I H THNG TRUYN HNH371.5Truyn tn hiu11/1/2015NHM 5PHN I H THNG TRUYN HNH11/1/201538

1.5Truyn tn hiuNHM 5PHN I H THNG TRUYN HNH Cht lng hnh ph thuc vo phn gii S dng qut cng nhiu, cht lng hnh nh cng p. Chn s dng qut mi hnh phi ln m bo sao cho khi mt ngi cch mn hnh mt khong bng 6 chiu cao ca hnh th gc to bi mt ngi n 2 dng lin tip trn mn hnh phi nh hn 1/60 Mt ta mi khng phn bit c ranh gii gia 2 dng v hnh nhn thy s mn, khng b sa ngang11/1/201539

l= 6hhCch xc nh s dng qut trn mi hnh1.5Truyn tn hiuNHM 539PHN I H THNG TRUYN HNHNguyn l chung v v tuyn truyn hnh11/1/201540Mch ghpLc hiPHTKKCSCTnCameraKTT(AM)Nhn tnKi m tnKTT(FM)Nhn tn

n chiu

S tng qut ca khi my pht hnh21345671.5Truyn tn hiuNHM 5PHN I H THNG TRUYN HNH S dng qut mi hnh 625 S hnh trong 1s 25 Cc dng 1 mnh c qut xen k Tn hiu c iu ch bin m Tn hiu m thanh c iu ch theo tn s Khong cch sng mang hnh v mang ting l 6,5MHz11/1/2015411.5Truyn tn hiuNHM 54111/1/201542

1.5Truyn tn hiuPHN I H THNG TRUYN HNHNHM 5PHN I H THNG TRUYN HNH

11/1/201543?1.6Truyn hnh Vit NamNHM 5 Truyn hnh Vit Nam pht sng chng trnh truyn hnh u tin vi cng ngh en trng vo ngy 7/9/1970 Sau nm 1976, truyn hnh Vit Nam (lc l i Truyn hnh Trung ng trc thuc y ban Pht thanh Truyn hnh) pht sng hng ngy ti Ging V nhng ch vo bui ti (19h00 - 22h00) v hu nh ch khu vc H Ni.11/1/201544

1.6Truyn hnh Vit NamPHN I H THNG TRUYN HNHNHM 5PHN I H THNG TRUYN HNH 1970-1980 Vit Nam vn pht TH trng en dng h SECAM Nhng t 1970 Vit nam th nghim pht TH mu 1980 Vit Nam chuyn qua pht xen k TH mu v TH trng en 1980-1990 y l giao on chuyn dao ca truyn hnh Vit Nam t trng en sang mu Nhng lng TV mu Vit Nam rt him ti thi im ny11/1/201545

1.6Truyn hnh Vit NamNHM 5PHN I H THNG TRUYN HNH Ti sao dng h truyn hnh SECAM?

Trong thi k 1980-1990 Vit Nam thuc t chc OIRT (t chc pht thanh truyn hnh cc nc XHCN ng u l Lin X: ang dung h SECAM) Sau nm 1990 Lin X tan r: VN chuyn sang dng h PAL vi nhiu u im vt tri hn, nhng thit b khng thay i nhiu v lng TV ti Vit Nam khng nhiu

11/1/201546

1.6Truyn hnh Vit NamNHM 5PHN I H THNG TRUYN HNH11/1/201547H SECAM Truyn tn hiu tng dng mt hai tn hiu n sc xen k Dr v Db. Tn hiu: gm 8 tin tc12345678Tin tc c sn ca tn hiu en trngCh xut hin ngu nhin thay th nhau (khng xut hin ng thi)Nhn dng dcNhn dng ngang (dng)fmRfmBCh dng 1 trong 2 ti my thu.1.7H truyn hnhNHM 5PHN I H THNG TRUYN HNHH NTSC (Natination Television System Commitee) Truyn ng thi 2 tn hiu sc Ei v Eq TH tin tc:

11/1/2015481234567TH truyn hnh trng enTH sc Ei v EqTn hiu le muPha gc ca sng mang con cn thit truyn i tch sng iu bin c nn1.7H truyn hnhNHM 5PHN I H THNG TRUYN HNHKhuyt im ca NTSC: Tn hiu sng ti ph b lch pha qua cc tng khuch i (chng hn mch c R, L, C). Ch cn sai 5o th mu b lc sc thi ri cn phi chnh TINT Trn thc t cho d hai sng ti ph vung gc nhng vn c s tng tc nh gia hai mu i chung nn mu km nguyn cht Sng ti ph trnh c ho tn fH nhng khng k n fv11/1/201549NHM 5PHN I H THNG TRUYN HNH11/1/201550

S phn chia khu vc dng h truyn hnh1.7H truyn hnhNHM 5PHN I H THNG TRUYN HNHH PAL (Phase Alternative Line) Truyn va ng thi va ln lt 2 TH sc u v v

My thu t ng iu chnh v pha ca TH sc (nu sai) bng cch dng chung TH sc ca dng trn v dng di

11/1/201551ng thi: c 2 dng iu c u v vLn lt: TH sc b o pha ln lt tng dng 1Truyn1234567TH truyn hnh trng enTH sc u v vTn hiu le mu1.7H truyn hnhNHM 5u=0493(Eb-Ey) 51PHN I H THNG TRUYN HNHS khc nhau ca 3 tiu chun truyn hnh? GING:> u to ra 3 mu cn bn RGB> Tn hiu chi lun bng cng thc h phn trm ca 3 mu c bn cng li Ex= 0.3 *Er + 0.11*Eb + 0.59*Eg11/1/201552KHC NHAUNTSC 1954SECAM 1956PAL 1966UH thng n gin, thit bi m ha khng qu phc tp gi thnh thp mo pha nh, t kh nhiuMo pha nh hn NTSC, khng xuyn ln muNHCD sai mu do di tn ca I v Q khc nhau v do s bt i xng ca bin tn TH IKhng kh c f mang nn c hin tng nhiu,1.7H truyn hnhNHM 5NTSC MPAL B,G,HPAL IPAL NPAL MSECAM B,G,HSECAM D,K,K',LLines/Fields525/60625/50625/50625/50525/60625/50625/50Horizontal Frequency15.734kHz15.625kHz15.625kHz15.625kHz15.750kHz15.625kHz15.625kHzVertical Frequency60Hz50Hz50Hz50Hz60Hz50Hz50HzColor Subcarrier Frequency3.579545MHz4.43361875MHz4.43361875MHz3.582056MHz3.575611MHzVideo Bandwidth4.2MHz5.0MHz5.5MHz4.2MHz4.2MHz5.0MHz6.0MHzSound Carrier4.5MHz5.5MHz5.9996MHz4.5MHz4.5MHz5.5MHz6.5MHz11/1/201553Bng so snh cc tiu chun truyn hnh1.7H truyn hnhPHN I H THNG TRUYN HNHNHM 553PHN 1. H THNG TRUYN HNH11/1/201554TRUYN HNH TRNG EN2Truyn hnh trng enNHM 5PHN I H THNG TRUYN HNH11/1/2015552.1 Nguyn l2.2 Tn hiu2.3 Khi pht tn hiuNI DUNG THUYT TRNHNHM 5PHN 1. H THNG TRUYN HNH11/1/201556

2.1Nguyn lNHM 5PHN I H THNG TRUYN HNH11/1/201557100%75%71%50%10%IqttVABMt dng qut AB ca tn hiu hnh c iu ch bin mXung ng b ngangen hn ti en ti enen nhten vaxmTrngQut ngc

Qut thunXug xo ngangim trng nht ca hnh tng ng vi bin in p thp nht. 1TH ng b: 75% - 100% B TH Video TH xo tia qut ngc: 75% B TH Video. TH hnh: 0% - 71% B TH Video2.1 Nguyn lNHM 5PHN I H THNG TRUYN HNHTn hiu truyn hnh y .11/1/201558

2.2Tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201559Tn hiu Audio

2.2Tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201560

2.3Khi pht tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201561

Thu tn hiu sng mang t cc i pht sau i tn v tn hiu IF, cung cp cho mch khuch i trung tn.Khuch i tn hiu trung tn v tch sng th tn tch tn hiu Video tng hp.Khuch i tn hiu video ln bin mnh.To ra cc mc in p cao cung cp cho n hnh hot ng, cung cp xung dng cho cun li ngang li tia in t qut theo chiu ngang.To ra xung mnh cung cp cho cun li tia, li tia in t dn theo chiu dc.Khuch i tn hiu iu tn FM, sau tch sng iu tn ly ra tn hiu m tn v khuch i qua tng cng xut ri a ra loa.iu khin 2 khi qut.AntennaLoan hnh2.3Khi pht tn hiuNHM 5PHN I H THNG TRUYN HNH

11/1/201562

HnhTing2.3Khi pht tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201563TRUYN HNH MU3Truyn hnh muNHM 5PHN I H THNG TRUYN HNH11/1/201564

Bn thch TV no?3Truyn hnh muNHM 5

11/1/201565

NHM 5PHN I H THNG TRUYN HNH11/1/2015663.1Gii thiu chung3.2Chuyn i tn hiu3.3Truyn tn hiuNI DUNG THUYT TRNH3Truyn hnh muNHM 5PHN I H THNG TRUYN HNH11/1/2015673Truyn hnh muNHM 5PHN 1. H THNG TRUYN HNH11/1/201568Tn dng tt c cc nguyn tc ca truyn hnh en trngL nguyn l c bn cho tt c cc dng truyn dn hnh nh a sc mu.Phi truyn i c tnh cht v mu sc ca tng im nh TH FM ting, TH ng b dng, ng b mnh khng thay i

TH Video Y(tn hiu chi mang thng tin hnh nh en trng)C (Sng mang ph mng tn hiu v thng tin mu).3.1Gii thiu chungNHM 5Thay v ch truyn i cng sng ca tng im nh th by gi truyn hnh mu 68PHN I H THNG TRUYN HNHiu g xy ra vi hnh nh mu?11/1/201569

3.1Gii thiu chungNHM 5PHN I H THNG TRUYN HNH

11/1/201570

3.1Gii thiu chungNHM 5PHN I H THNG TRUYN HNHTi sao li ch c 2 tn hiu mu R Y, B - Y?11/1/201571

Tn hiu chi lun bng cng thc h phn trm ca 3 mu c bn cng liEchi= 0.3 *ER + 0.11*EB + 0.59*EG Ca mt muEx= a *ER + b*EB + c*EGa + b + c = 100%

3.1Gii thiu chungNHM 5PHN I H THNG TRUYN HNH11/1/201572

3.2Chuyn i tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201573Cu to ca camera mu

3.2Chuyn i tn hiuNHM 5PHN I H THNG TRUYN HNHNguyn l mch cng t l (Matrix) ti to chi Y t cc thnh phn mu

11/1/201574

YRGB3.2Chuyn i tn hiuNHM 5Pha sau camera c b phn hot ng nh t bo que to li tn hiu trng en, hay cn gi l chi:Y = 0,3R + 0,59G + 0,11BMch to ra tn hiu trng en cho tivi gi l mch matrix. Tn hiu video tng hp R, G, B v chi Y s c gi n my thu.Sau , cho 3 tia R, G, B vo 3 Cathod ca n hnh pha li mu trn mt n hnh mu.

74PHN I H THNG TRUYN HNHLm th no chn tn hiu sc vo trong tn s c sn ca truyn trng en11/1/201575?3.2Chuyn i tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201576

3.2Tn hiu3.2Chuyn i tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201577

Qu trnh chn tn hiu mu vo TH trng enBin i4 tin tc6 tin tc3.2Chuyn i tn hiuNHM 577PHN I H THNG TRUYN HNH11/1/201578

MATRIXThc hin cng tr in p theo t l nh sn chuyn i tn hiuER EG EBEB-EYER-EYiu ch sng mang con fsc < max{EY}EYTHHNH Y

3.2Chuyn i tn hiuNHM 578PHN I H THNG TRUYN HNH

11/1/201579ng b mnhng b dngSng mang iu tn tn hiu tingSng mang ph mang thng tin muMng thng tin hnh nh trng en, tn hiu c gi li tng thch my thu en trng.TH trng en3.3Truyn tn hiuNHM 5PHN I H THNG TRUYN HNH11/1/201580

? + ? + H syn + V synTn hiu video TH muYC3.3Truyn tn hiuNHM 5PHN 1. H THNG TRUYN HNH11/1/2015813.3Truyn tn hiu

Khuch i m.K tn hiu Y, thay i tng phn, sng.Gii m tn hiu sng mang C & ti to li.Trn TH mu ti tp y .NHM 5PHN I H THNG TRUYN HNH11/1/201582Ph tingft8,00,256,51,25fhSmtSmhPh tingftfPh hnhSng mang hnhPhn ct btfffhSng mang tingPh hnhT.h. cao tn hnh AMttT.h. cao tn ting FM Ph tn s ca knh truyn hnh(tiu chun D/K)3.3Truyn tn hiuNHM 5PHN I H THNG TRUYN HNHBng sngKnhKhong tn s (MHz)VHFVLI1, 248 66II3, 4, 576 100VHIII6 12174 230 UHFIV21 34470 582V35 81582 95811/1/2015833.3Truyn tn hiu Cc bng sng truyn hnh tiu chun D/KNHM 5PHN I H THNG TRUYN HNH?Thu v x l tn hiu nh th no11/1/2015843.3Truyn tn hiuNHM 5

11/1/201585NHM 511/1/201586AKB = 12VBH>100VIF. AGCPhn hnhPhn trung tnPhn cao tnDao ng niRF. AGCSP (Loa)Phn ng bHVXung phi hiDao ng dc 50HzT.h.Video (-)T.h.Video(a i tch xung .b.)G1G2G3V. YokeCRT(nhnh)Phn qut ngang v phi hiRF AMP(K cao tn)MIX(Trn tn)OSC(Dao ng ni)1,2,3 VIF AMP(KTT hnh 1, 2,3)aD9VIDEO AMP(K hnh)VIDEO DET(Tch sng hnh)VIDEO OUT(Xut hnh)V. OUT(Xut dc)H. OUT(Xut ngang)AGC(T iu khuch)V. DRIVE(Thc dc)V. OSC(Dao ng dc)H. OSC(Dao ng ngang)H. DRIVE(Thc ngang)AFC(So pha)Tch phnVi phnPOWER SUPPLYCp ngunREGULATOR(n p)SYN SEP(Tch xung)HVFLYBACK(Phi hi)BHPhn qut dcPhn ngunH. Yoke1,2 SIF AMP(KTT ting 1, 2)SOUND DET(Tch sng ting)AUDIO AMP(K m tn)AUDIO OUT(KCS m tn)Phn tingT.h.t.t.t.2 FMT.h.VideoDao ng ngang 15.625HzXung b ngangHnh 18 NHM 5PHN I H THNG TRUYN HNH

11/1/201587

Trng enMu

Video + H syn +V synY + C + H syn + V syn3.5So snhtruynhnhtrng en v muNHM 5PHN I H THNG TRUYN HNH11/1/201588TRUYN HNH S101010010114Truyn hnh s101010101111NHM 5PHN I H THNG TRUYN HNH11/1/201589H THNG TRUYN HNH K THUT S MT T CHUN DVB-T24Truyn hnh sNHM 54.1 Truyn hnh HD4.2 Truyn hnh k thut s4.3 Truyn hnh s mt t DVB-T2PHN I H THNG TRUYN HNHNI DUNG THUYT TRNH4Truyn hnh s11/1/201590NHM 590

PHN I H THNG TRUYN HNHC TH BN BIT???11/1/201591NHM 591PHN I H THNG TRUYN HNH11/1/201592

C TH BN BIT???NHM 5PHN I H THNG TRUYN HNH HDTV (Hight-definition televition) l thut ng ch cc cng ngh truyn hnh th h mi c phn gii cao hn phn gii SD theo tiu chun trc y v cht lng hnh nh, m thanh tt hn11/1/2015934.1Truyn hnh HDNHM 5PHN I H THNG TRUYN HNH11/1/2015944.1Truyn hnh HDTruyn hnh hd cng ngh analogH thng muse nht bn - 1990FAIL phn gii cn thp Bng thng ln hn nhiu so vi TH analog bnh thngNHM 5PHN I H THNG TRUYN HNH11/1/2015954.1Truyn hnh HDTruyn hnh HD k thut sng dng k thut s trong x l video audio Bng thng thpc ng dng rng riNHM 5PHN I H THNG TRUYN HNH11/1/2015964.2Truyn hnh KTS4.2.1 Gii thiu4.2.2 Phn loi4.2.3 Cc chun truyn hnh s4.2.4 Cc thng s truyn hnh sNHM 5PHN I H THNG TRUYN HNH (Digital television - DTV) l mt loi hnh mi ca cng ngh truyn hnh trn th gii. Trong DTV, tn hiu hnh nh v m thanh c x l bng k thut s thay cho cng ngh x l tn hiu analog . Cng ngh truyn hnh s cn c th tch hp truyn d liu tc cao, bao gm c internet.

11/1/2015974.2Truyn hnh KTS4.2.1 Gii thiuNHM 5PHN I H THNG TRUYN HNH T nm 2001, Vit Nam tin hnh th nghim pht sng truyn hnh mt t, n nm 2020 c bn chm dt truyn dn, pht sng truyn hnh mt t s dng cng ngh analog trn ton quc11/1/2015984.2.1 Gii thiuNHM 598PHN I H THNG TRUYN HNHNhm I:c s ha u tin, d kin hon thnh s ha khi ht thng 12 2015.Nhm II:d kin hon thnh s ha khi ht thng 12 2016Nhm III: d kin hon thnh s ha khi ht thng 12 2018.

Nhm IV: d kin hon thnh s ha khi ht thng 12 20204.2.1 Gii thiu

11/1/201599NHM 5PHN I H THNG TRUYN HNH11/1/20151004.2.2 Phn loiTRUYN HNH K THUT S CPTRUYN HNH K THUT S MT TTRUYN HNH K THUT S V TINHNHM 5100PHN I H THNG TRUYN HNH Digital Video Broadcasting Advanced Television System Committee Integrated Services Digital Broadcasting Digital Terrestrial Multimedia Broadcasting Digital Multimedia Broadcasting(mobile devices)11/1/20151014.2.3Cc tiu chun TH s

NHM 5101PHN I H THNG TRUYN HNH Frame size: 1280x720 (720) hoc 1920x1080 (1080) Sacnning System : c ch ra nh k t sau phn gii, P-qut lin tc (progressive scanning), i- qut xen k (interlaced scanning). Frame rate : tc khung hnh trong mt giy11/1/20151024.2.4Cc thng s truyn hnhNHM 5PHN I H THNG TRUYN HNH11/1/20151034.3Truyn hnh mt t DVB-T24.3.1 Gii thiu4.3.2 S tng qut4.3.2 S khi pht sng4.3.3 Qu trnh x l data4.3.4 K thut nn video v audio4.3.5 u im truyn hnh s DVB-T2NHM 5PHN I H THNG TRUYN HNH L h thng truyn hnh s thc hin truyn sng bng cch pht sng mt t p dng chun DVB-T2 DVB-T2 l th h th 2 ca chun truyn hnh s mt t DVB-T c nghin cu bi tt chc DVB v c cng nhn bi t chc ETSI (European Telecommunications Standards Institute)11/1/20151044.3.1Gii thiuNHM 5PHN I H THNG TRUYN HNH11/1/20151054.3.2S tng qut

NHM 5PHN I H THNG TRUYN HNH11/1/2015106

4.3.2S tng qutNHM 5

4.3.3S pht sngPHN I H THNG TRUYN HNH11/1/2015107NHM 5

Mt i truyn hnh c nhiu ngun video khc nhau nh t internet, nhng video cc b thu thp c, cp, cc knh v tinh nc ngoi. 4.3.3S pht sngPHN I H THNG TRUYN HNH11/1/2015108NHM 5

nn v m ha video, audio, ti thiu ha khng gian lu tr ca d liu4.3.3S pht sngPHN I H THNG TRUYN HNH11/1/2015109NHM 5

gim st iu khin, pht hin v khc phc s c cho ton h thng, ti u ha h thng v gim thiu s gin on ca truyn hnh4.3.2S pht sngPHN I H THNG TRUYN HNH11/1/2015110NHM 5

Km sot kh nng c tn hiu truyn hnh tr ph ca ngi dng, ch c nhng ngi dng c hp ng cn hiu lc mi c th xem c cc knh truyn hnh4.3.2S tng qutPHN I H THNG TRUYN HNH11/1/2015111NHM 5

iu ch d liu vi sng mang, ty vo phng thc truyn sng m mi h thng s c phng php iu ch khc nhau4.3.2S tng qutPHN I H THNG TRUYN HNH11/1/2015112NHM 5

4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015113NHM 5

M ha dng bit theo nh dng GSE4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015114NHM 5

ng b dng bitKim tra gi tin nullThm vo trng sa li4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015115NHM 5

Thm vo BB header (base band header) v thng tin inband hoc padding sau dng bit c xo trn4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015116NHM 5

Khi cha li, p dng 2 k thut l LDPC v BCH sau ng gi dng bit thnh cc cell.4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015117NHM 5

ng gi dng bit thnh frameiu phi cc dng bit trong h thng 4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015118NHM 5

m ha knh truyn v truyn n angten pht sng4.3.4Qu trnh s l DataPHN I H THNG TRUYN HNH11/1/2015119NHM 5PHN I H THNG TRUYN HNH11/1/20151204.3.5K thut nn Video v AudioChun DVB-T2 p dng chun nn video h.264 v chun nn audio HEAACNHM 5PHN I H THNG TRUYN HNH11/1/2015121 H264 / MPEG4 Part 10 hay AVC (Advanced Video Coding) l mt nh dng nn video,hin ang c dng ph bin nht hin nay trong cng ngh m ha, phn phi v x l video ni chung. H264 c pht trin bi ITU-T Video Coding Experts Group (VCEG) v ISO/IEC JTC1.

M ha video h.2644.3.5K thut nn Video v AudioNHM 5PHN I H THNG TRUYN HNH H.264 nn video bng cch gim bt d tha c v khng gian v thi gian trong hnh nh. Nhng d tha v mt thi gian l nhng hnh nh ging nhau lp i lp li t khung (frame) ny sang khung khc. D tha v khng gian l nhng chi tit ging nhau xut hin trong cng mt khung

11/1/2015122M ha video h.2644.3.5K thut nn Video v AudioNHM 5PHN I H THNG TRUYN HNH H264 c th gim tc bit xung hn 50% so vi chun MPEG-2. V vy, n c ng dng trong cc lnh vc truyn thng nh qung b HDTV, truyn thng qua mng Internet, tin nhn a phng tin,qua cc mng wireless, LAN, ISDN,..11/1/2015123M ha video h.2644.3.5K thut nn Video v AudioNHM 5PHN I H THNG TRUYN HNH M ha m thanh HE-AAC (Hight eficiency advanced audio coding) l mt nh dng nn m thanh a nng kiu lossly c nh ngha theo tiu chun MPEG-4. c s dng trong m ha vi bitrate thp, c bit c tc dng tp tin m thanh a knh. 11/1/2015124M ha audio HE-AAC4.3.5K thut nn Video v AudioNHM 5PHN I H THNG TRUYN HNH M ha m thanh HE-AAC (Hight eficiency advanced audio coding) l mt nh dng nn m thanh a nng kiu lossly c nh ngha theo tiu chun MPEG-4. c s dng trong m ha vi bitrate thp, c bit c tc dng tp tin m thanh a knh.

11/1/2015125M ha video h.2644.3.5K thut nn Video v AudioNHM 5PHN I H THNG TRUYN HNH Nng cao cht lng truyn hnh, cung cp nhiu knh truyn hinh cht lng HD vi ni dung phong ch v cht lng hnh nh, m thanh tt hn, pht huy ti a hiu sut ca TV HD11/1/20151264.3.6u im ca truyn hnh s DVB-T2NHM 5PHN I H THNG TRUYN HNH Tit kim bng thng: khi hon thnh s ha truyn hnh, mt phn bng tn UHF s dng cho truyn hnh mt t s c gii phng. Phn bng tn ny c th dnh pht trin cc dch v thng tin di ng bng rng (4G) v mt s dch v thng tin v tuyn khc.11/1/20151274.3.6u im ca truyn hnh s DVB-T2NHM 5PHN I H THNG TRUYN HNH Tit kim c kinh ph u t thit b, nhn cng vn hnh, tin in, nh trm11/1/20151284.3.6u im ca truyn hnh s DVB-T2

NHM 5PHN 211/1/2015129H THNG TRUYN THANHNHM 512911/1/2015130Gii thiu chungK thut iu chMy thu pht thanhLch s hnh thnh pht thanh,TTVT, SVTDi tn s truyn thanh.iu ch FM, AM.My thu / pht FM, AM.Gii thiu pht thanh sCc tiu chun, bng tn s dngPHN 2 H THNG TRUYN THANHNHM 5PHN 2 H THNG TRUYN THANH11/1/2015131Gii thiu chungK thut iu chMy thu pht thanhLch s hnh thnh pht thanh,TTVT, SVTDi tn s truyn thanh.iu ch FM, AM.My thu / pht FM, AM.Gii thiu pht thanh sCc tiu chun, bng tn s dngNHM 511/1/2015132

2.1 Gii thiu chung2.1.1 Lch s pht trin ca truyn thanh2.1.1.1 Lch s hnh thnhPHN 2 H THNG TRUYN THANHNHM 511/1/2015133

2.1.1.1 Lch s hnh thnhPHN 2 H THNG TRUYN THANHNHM 511/1/2015134

PHN 2 H THNG TRUYN THANH2.1.1.1 Lch s hnh thnh

NHM 511/1/2015135

PHN 2 H THNG TRUYN THANH2.1.1.1 Lch s hnh thnh

NHM 511/1/2015136PHN 2 H THNG TRUYN THANH2.1.1.1 Lch s hnh thnh

NHM 5Rt pht trin khng ch trong lin lc m cn trong cng nghip nh chin tranh, chinh phc v tr Ni chuyn c th nhn thy hnh nh u dy bn kia cng c thc hin Tp trung pht trin mnh cc nc pht trin nh Php, Nga, M, Trung Quc

11/1/2015137PHN 2 H THNG TRUYN THANH2.1.1.2 Tnh hnh pht trin trn th giiNHM 511/1/2015138Lin minh vin thng ITU

PHN 2 H THNG TRUYN THANH2.1.1.2 Tnh hnh pht trin trn th giiNHM 5 Nm 1935: i pht thanh u tin Si Gn Ngy 7 - 9 - 1945: i ting ni Vit Nam c pht thanh u tin th H Ni11/1/2015139

PHN 2 H THNG TRUYN THANH2.1.1.3 Tnh hnh pht trin Vit NamNHM 5Hin nay k thut pht trin ng b v hin i c c trm nghin cu v tr 11/1/2015140

PHN 2 H THNG TRUYN THANH2.1.1.3 Tnh hnh pht trin Vit NamNHM 511/1/2015141PHN 2 H THNG TRUYN THANH2.1.2 Thng tin v tuyn2.1.2.1 Phn loiNHM 511/1/2015142u imNhc im Thit lp nhanh Nhiu trn ng truyn Kt ni nhanh chng Chu tc ng ca thi tit kh ln Chi ph s dng r Suy hao ng truynPHN 2 H THNG TRUYN THANH2.1.2.2 u nhc im ca thng tin v tuynNHM 5a. Mi trng

Sng v tuyn Sng v tuyn

Sng v tuyn l mt loi sng in t c hnh thnh t cc in trng cao v thp, lan truyn vi tc nh sng.Truyn trong mi trng rn, lng, kh.11/1/2015143Tin tcKhng gianTin tcPHN 2 H THNG TRUYN THANH2.1.3 c tnh v phng thc truyn sng v tuyn2.1.3.1 c tnhNHM 5b. Tnh lan truyn11/1/2015144Phn loi lan truynDng sngc imSng mt tSng trc tipSng i trc tip t anten pht n anten thuSng phn xSng phn x trn mt t anten thu thu cSng mt tSng lan truyn dc theo mt t Sng tn xSng truyn ti pha sau to nh, dy niSng tng in lySng phn xSng phn x n anten thuSng tng i luSng trc tipSng b tn x do cc phn t khPHN 2 H THNG TRUYN THANH2.1.3.1 c tnhNHM 511/1/2015145

PHN 2 H THNG TRUYN THANH2.1.3.2 Phng thc truyn sngNHM 511/1/2015146PHN 2 H THNG TRUYN THANH2.1.4 Cc di tn s truyn thanhTn Tn s ng dngELF 3 30 Hz Thng tin hng hiSLF 30 300 Hz Thng tin hng hiULF 300 3000 Hz Tn s tai ngi nghe cVLF 3 30 kHz Thng tin ni b trong qun i, c quan nh ncLF 30 300 kHz Qung b AM sng diMF 300 3000 kHz Qung b AM sng trungHF 3 30 MHz Qung b AM sng ngnVHF 30 300 MHz Qung b sng FMUHF 0,3 3 GHz Qung b v tuyn truyn hnhSHF 3 30 GHz Thng tin v tinh, radaEHF 30 300 GHz Thin vn hc v tuynNHM 511/1/2015147iu chiu ch xungiu ch lin tcFMVSBSSB-SCSSBBin PPMPMPCMGc phaPAMDeltaAM-SCPDMc tng tiu ch s2.2 iu ch AM trong truyn thanhAMPHN 2 H THNG TRUYN THANHNHM 511/1/2015148

2.2.1 iu ch AM mc thpPHN 2 H THNG TRUYN THANHNHM 511/1/2015149

2.2.2 iu ch AM mc caoPHN 2 H THNG TRUYN THANHNHM 511/1/20151502.2.4 nh gi cht lng iu ch AM2.2.4.1 H s hi2.2.4.2 lch h s iu bincho php gi tr trung bnh.2.2.4.3 Mc iu bin k sinh.PHN 2 H THNG TRUYN THANHNHM 511/1/2015151Mch dao ng to sng mang RFMch khuch i mMch iu khin sng mangMch iu binNgun tn hiu iu binMch tin khuch iMch iu khin tn hiu iu binMch khuch i cng sut tuyn tnh tc thiMch khuch i cng sut tuyn tnh tng cui cngMch ghp2.3.1 My pht AM mc thp2.3 My pht AM Anten phtPHN 2 H THNG TRUYN THANHNHM 511/1/2015152Ngun tn hiu iu binMch ghpMch iu bin AM v mch khuch i cng sutMch khuch i cng sut sng mangMch iu khin sng mangMch khuch i mMch khuch i cng sut tn hiu iu binMch iu khin tn hiu iu binMch dao ng to sng mangMch tin khuch i2.3.2 My pht AM mc caoAnten phtPHN 2 H THNG TRUYN THANHNHM 511/1/2015153

2.4.1 My thu iu hng tn s RF2.4 My thu AMPHN 2 H THNG TRUYN THANHNHM 511/1/2015154

PHN 2 H THNG TRUYN THANH2.4.2 My thu i tnNHM 511/1/2015155

2.5.1 iu ch FM trc tip2.5 iu ch FM PHN 2 H THNG TRUYN THANHNHM 511/1/2015156

2.5.2 iu ch FM gin tipPHN 2 H THNG TRUYN THANHNHM 511/1/2015157Mch iu tn v mch dao ng chfc = 5,1 MHzLPFBPFMch trnMch dao ng chun dng thch anh 14,3 MHzMch m v mch nhn X2Mch nhn dng tn s 2MHzN3X3PowerAmpN1 X3N2X2Tn hiu iu tn voVng AFCf2=30,6MHz2.6.1 My pht FM trc tipf3= 91,8 MHzfm= 2MHzf = 26,8 MHz2.6 My pht FMPHN 2 H THNG TRUYN THANHNHM 511/1/2015158Mch dao ng to sng mang dng thch anh 200 kHzMch dch pha 90 Mch ghpMch khuch i mMch khuch i cng sutMch iu tn cn bngMch nhn X72Mch khuch i mMch trnMch dao ng thch anh 13,15 kHzMch nhn X72Ng vo fmPHN 2 H THNG TRUYN THANH2.6.2 My pht FM gin tipftf2foVcVcf1ftfoNHM 511/1/2015159Mch tin la chnMch khuch i RFMch nhn dngMch gii nhnMch trn th nhtMch mMch dao ng ni th nhtMch trn th haiMch mMch khuch i m thanhMch gii hnMch dao ng ni th haiMch khuch i IFAnten thuTng tch sng m thanh2.7.1 My thu FM i tn kp2.7 My thu FMLoaPHN 2 H THNG TRUYN THANHNHM 511/1/2015160Mch nhn dng tn sMch khuych i v mch nhn X2Mch lc thng di 19kHzLPF v mch trMch lc thng di 23kHz 53kHzMch gii m stereoMch tch sng cn bngMch khuch iMch gii nhnMy thu monoMy thu steroL + RLoa LLoa RPHN 2 H THNG TRUYN THANH2.7.2 My thu FM mono v stereoL+ RL- RAnten thuNHM 5L+R 2L

L-R 2R11/1/2015161Mch cngMch cngMch gii nhnMch khuch i m thanhMch gii nhnMch khuch i m thanhLoa LLoa RKnh L+R c cng trc tip vi knh L-R(L+R) + (L-R) = 2LKnh L+R c b tr vi knh L-R(L+R) - (L-R) = 2RPHN 2 H THNG TRUYN THANHMch gii m stereo NHM 511/1/20151622.8 Truyn thanh s ti Vit Nam2.8.1 Hin trng ti Vit Nam 1 i pht thanh quc gia v 62 i pht thanh a phng, c tt c 68 knh v tt c u ang s dng cng ngh analog.Hn ch ca cng ngh analog Vit Nam s dng l: chi ph cao khi m rng pht sng, kinh ph u t ln, chu nh hng ca thi titVic chuyn sang pht thanh s l s bt buc trong tng laiPHN 2 H THNG TRUYN THANH

NHM 511/1/2015163Nng cao cht lng chng trnhGim chi ph khai thcTng ngun thu vi cc dch v gia tngNng cao hiu qu s dng ph tn s v tuyn inCht lng m thanh tng ng vi a CDC th khc phc cc nhc im ca AM, FM nh nhiu, mo tn hiu

PHN 2 H THNG TRUYN THANH2.8.2 u im ca truyn thanh s

NHM 5

11/1/2015164PHN 2 H THNG TRUYN THANH2.8.3 M hnh khai thc NHM 511/1/2015165DAB (Digital Broadcasting Worldwide): do chu u xut.Tiu chun IBOC (In Band On Chanel): do M xut, tn mi hin nay l HD - Radio (High Definition Radio).Tiu chun DRM (Digital Radio Mondiale): do Vin tiu chun truyn thng Chu u (ETSI) xut.Tiu chun ISDB-T (Terestrial Intergrated Services Digital Broadcasting): do Nht Bn xut.

PHN 2 H THNG TRUYN THANH2.8.4 Cc tiu chun s dng

NHM 511/1/2015166PHN 2 H THNG TRUYN THANH2.8.5 Bng tn s dng

NHM 511/1/20151672.8.5 i nt v tiu chun DRM2.8.5.1 Bng tn pht sng Pht sng trn tt c cc bng L, S, FM, band 1,3 ca VHFThch hp vi iu kin 3/4 a hnh l i ni nc taS dng duy nht chun ny pht sng trn ton quc, t tit kim tin cho vic mua my thu.

PHN 2 H THNG TRUYN THANHNHM 511/1/20151682.8.5.2 Tn dng c s h tngPht trn cc bng tn m pht thanh analog ang s dng hin nayS dng v tn dng c c s vt cht lun ch cn nng cp my thu v truyn dnBng thng DRM l 96KHz

PHN 2 H THNG TRUYN THANHNHM 511/1/20151692.8.5.3 Cnh bo thm ha khn cp (EWF)y l mt tnh nng c bit nhm thng bo v thin tai, l lt c bit l i vi ng dn, ngi lao ng trng ch vo thi titCc my thu khi nhn tn hiu t trung tm s bo vi mc m lng ln nht v h tr a ngn ng k c khi bn tt i.Hot ng trong mi iu kin thi tit.

PHN 2 H THNG TRUYN THANHNHM 511/1/20151702.8.5.4 H tr thng tin giao thngMy thu t ng iu chnh tn s ca chng trnh khi qua cc vng khcCp nht thng tin giao thng lic tc, ti u ha ng i s hin th trn mn hnh my thu

PHN 2 H THNG TRUYN THANHNHM 511/1/20151712.8.5.5 H tr a phng tinTng tc vi trung tm pht thanh, gi yu cu v dch v khng cn internet hay quan tm n vng ph sng mnh hay yuCh vi phm bm Hot-Button trn mn hnh bn c th yu cu mi dch v m nh i cung cp H tr a ngn ng Rt ph hp vi iu kin thi tit, kh hu, dch v v c s hn tng ca Vit Nam.PHN 2 H THNG TRUYN THANHNHM 511/1/2015172NHM 5173

11/1/2015NHM 5STTTHNG SCC TIU CHUNFCCU Hi Thng Tin Ln BangCCIRy Ban T Vn V Tuyn in Quc TOIRTT Chc Pht Thanh & Pht Hnh Quc T

1S dng qut trong mi hnh525625625

2S hnh xut hin trong 1s302525

3Cch qutXen kXen kXen k

4 rng di tn hnh4MHz5MHz6MHz

5Tn s qut ngang (qut dng)15.750Hz15.625Hz15.625Hz

6Chu k qut ngang (qut dng)63,56464

7Tn s qut dc (qut mnh)60Hz50Hz50Hz

8Chu k qut dc (qut mnh)16,7ms20ms20ms

9Phng php iu ch tn hiu hnhBin m Bin mBin m

10Cc mc tn hiu - nh ng bthnh phn so vi - Xotn hiu Video - Mc trng - Mc en100%

(752,5)%

(12,52,5)%

(702,5)%100%

(752,5)%

(12,52,5)%

(702,5)%100%

(752,5)%

(12,52,5)%

(702,5)%

11Phng php iu ch tn hiu tingTn sTn s Tn s

12Khong cch gia sng mang hnh v ting 4,5MHz5,5MHz6,5MHz

13 rng di tn chung (hnh, ting)6MHz7MHz8MHz

14Tn s trung tn hnh45,75 MHz38MHz38MHz

15Tn s trung tn ting41,25MHz32,5MHz31,5MHz

16 Trung tn th hai ca ting4,5MHz5,5MHz6,5MHz

17 Khun hnh b:h4:34:34:3