Copy of Ngan Hang de TH So

7/31/2019 Copy of Ngan Hang de TH So

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NGN HNG THI MN TRUYN HNH S

Chng 1. Gii thiu truyn hnh s v nh s

1. Th t cc khi pha pht ca h thng truyn hnh s?

Nn_ghp knh; M ha knh; ADC; iu ch

M ha knh; Nn_ghp knh; ADC; iu chADC; Nn_ghp knh; M ha knh; iu ch

Nn_ghp knh; M ha knh; iu ch; ADC

2. Th t cc khi pha thu ca h thng truyn hnh s?

DAC; Gii iu ch; Gii m knh; Tch knh_gii nn

Gii iu ch; Gii m knh; Tch knh_gii nn; DAC

DAC; Tch knh_gii nn; Gii iu ch; Gii m knh

Gii m knh; Gii iu ch; Tch knh_gii nn; DAC

3. u im ca knh thng tin v tuyn:

D lp t, d dng truyn qung b

D lp t, d dng truyn qung b, tnh bo mt cao

Thng tin t b mt tuyn, bo mt cao, t b nh hng ca mi trng

Thng tin t b mt tuyn, d lp t, d dng truyn qung b

4. u im ca knh thng tin hu tuyn:

D lp t, d dng truyn qung b

Thng tin t b mt tuyn, d lp t, d dng truyn qung b

D lp t, d dng truyn qung b, tnh bo mt cao

Thng tin t b mt tuyn, bo mt cao, t b nh hng ca mi trng

5. la chn phn gii cho mt hnh nh s, ngi ta cn c vo yu t no?

Tn s ly mu

di ca dy tn hiu nh phn

Tn s qut (qut dng v qut mnh)

T l mn hnh

6. nh s:

L nh tng t c gin on theo thi gian

L nh tng t c gin on theo khng gian v sng

L nh tng t c gin on theo khng gian

L nh tng t c gin on theo khng gian v thi gian

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7. nh en trng?

Mi im nh c biu din bng 3 mc: en, xm v trng.

Mi im nh c biu din bi 2 mc en hoc trng

Mi im nh c biu din bng 1 mc chi khc nhau

Mi im nh c biu din bng 1 tn hiu chi v cc tn hiu mu

8. nh Gray-scale?

Mi im nh c biu din bng 3 mc: en, xm v trng.Mi im nh c biu din bi 2 mc en hoc trng

Mi im nh c biu din bng 1 mc chi khc nhau

Mi im nh c biu din bng 1 tn hiu chi v cc tn hiu mu

9. nh mu?

Mi im nh c biu din bng 3 mc: en, xm v trng.

Mi im nh c biu din bi 2 mc en hoc trng

Mi im nh c biu din bng 1 mc chi khc nhauMi im nh c biu din bng 1 tn hiu chi v cc tn hiu mu

10. Theo tiu chun truyn hnh s c bn CCIR 601:

Tn s ly mu tn hiu chi l 13,5 MHz




11. Tiu chun truyn hnh s c bn CCIR 601 s dng cu trc ly mu no?

S dng cu trc ly mu 4:2:2




12. u im ca truyn hnh s so vi truyn hnh tng t?

Bng tn hp hn

Thit b n gin

Kh nng chng nhiu tt hn

Tn hiu d dng truyn i xa hn

13. u im ca truyn hnh s so vi truyn hnh tng t?

Bng tn rng hn

Khng b chng ph

Khng b nh hng ca mo phi tuyn

Tn hiu d dng truyn i xa hn

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L qu trnh phn lp, phn loi nh, xc nh v d on bin nh, nn nh, phn tch v nhndng hnh nh

21. Th no l h thng x l nh mc trung?

L qu trnh bin i nh thc hin cc b lc nhm kh nhiu, tng tng phn hay nt.

L qu trnh phn lp, phn loi nh, xc nh v d on bin nh, nn nh

L qu trnh phn tch v nhn dng hnh nh


22. Th no l h thng x l nh mc cao?

L qu trnh bin i nh thc hin cc b lc nhm kh nhiu, tng tng phn hay nt.

L qu trnh phn lp, phn loi nh, xc nh v d on bin nh, nn nh

L qu trnh phn tch v nhn dng hnh nh


23. i vi h thng x l nh mc thp:

Tn hiu a vo h thng x l l hnh nh, tn hiu u ra l cc thnh phn tch ra t nh gc

Tn hiu a vo h thng x l l cc thnh phn tch ra t nh gc, tn hiu u ra l hnh nh

Tn hiu a vo h thng x l l nh quang hc, tn hiu u ra l cc thnh phn tch ra tnh gc

Tn hiu a vo h thng x l l nh quang hc, tn hiu u ra cng l nh quang hc

24. i vi h thng x l nh mc trung:

Tn hiu a vo h thng x l l hnh nh, tn hiu u ra l cc thnh phn tch ra t nh gc

Tn hiu a vo h thng x l l cc thnh phn tch ra t nh gc, tn hiu u ra l hnh nh

Tn hiu a vo h thng x l l nh quang hc, tn hiu u ra l cc thnh phn tch ra tnh gc

Tn hiu a vo h thng x l l nh quang hc, tn hiu u ra cng l nh quang hc

Chng 2. S ha tn hiu video

25. Ly mu l g?L qu trnh ri rc ha tn hiu theo min thi gian

L qu trnh ri rc ha tn hiu theo min bin

L qu trnh ri rc ha tn hiu theo min tn s

L qu trnh ri rc ha tn hiu theo min bin v tn s

26. Khi ly mu, tn s ly mu phi tha mn iu kin g?

Khng ln hn hai ln tn s tn hiu cao nht

Khng ln hn hai ln tn s cao nht ca tn hiuKhng nh hn hai ln tn s cao nht ca tn hiu

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Khng nh hn hai ln tn s tn hiu cao nht

27. Cu trc trc giao khi ly mu tn hiu Video l:

Cc mu c sp xp (trn cc dng k nhau) theo hng thng ng. Cu trc ny c nh theomnh .

Cc mu trn cc dng k nhau thuc mt mnh xp thng hng theo chiu ng, nhng cc muthuc mnh hai li dch i mt na chu k ly mu so vi cc mu ca mnh th mt.

Cc mu trn cc dng k nhau thuc mt mnh lch nhau mt na chu k ly mu, cc mu trndng mt mnh lch so vi cc mu trn dng tip sau (ca mnh sau) mt na chu k ly mu.

Cc mu c sp xp (trn cc mnh k nhau) theo hng ngang. Cu trc ny c nh theo dng.

28. Cu trc quincunx mnh khi ly mu tn hiu Video l:



Cc mu trn cc dng k nhau thuc mt mnh lch nhau mt na chu k ly mu, cc mu trndng mt trong mnh lch so vi cc mu trn dng tip sau (ca mnh sau) mt na chu k lymu.


29. Cu trc quincunx dng khi ly mu tn hiu Video l:



Cc mu trn cc dng k nhau thuc mt mnh lch nhau mt na chu k ly mu, cc mu trndng mt trong mnh lch so vi cc mu trn dng tip sau (ca mnh sau) mt na chu k lymu.


30. Lng t ha l g?

L qu trnh ri rc ha tn hiu theo min thi gian

L qu trnh ri rc ha tn hiu theo min bin

L qu trnh ri rc ha tn hiu theo min tn sL qu trnh ri rc ha tn hiu theo min bin v tn s

31. Cc h thng truyn hnh s hin nay thng s dng bao nhiu bit biu din mu?

4 bits

10 bits

24 bits

32 bits

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32. Dng sng sau y m t cho loi m s cp no?

M NRZ-S

M RZM NRZ-S

M NRZ-P


M NRZ-SM RZ

M RZ-P

M NRZ-P


M NRZ-S

M RZ

M NRZ-M

M NRZ-P


M NRZ-S

M RZ

M NRZ-M

M NRZ-P

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M NRZ-S

M RZ

M NRZ-M

M NRZ-P


M RZ-S

M RZ-U

M NRZ-MM RZ-P


M RZ-S

M RZ-U

M RZ

M RZ-M

39. Tiu chun 4fsc NTSC c tn s ly mu tn hiu Video l:

3,58MHz.

4,43 MHz.

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14,32818MHz.

10,738635MHz.

40. Tiu chun 4fsc PAL c tn s ly mu tn hiu Video l:

14,32818MHz.

10,738635MHz.

17,734475MHz

4,43 MHz

41. Tiu chun ly mu 4:4:4 c:

Cc tn hiu chi, cc tn hiu mu c ly mu ti tt c cc im ly mu trn dng tch ccca tn hiu Video.

im u ly mu tn hiu chi v cc tn hiu mu, im k tip ch ly mu tn hiu chi, khngly mu cc tn hiu mu, im sau na li ly mu c tn hiu chi v cc tn hiu mu.

Ly mu tn hiu chi ti tt c cc im ly mu, cn cc tn hiu mu th c cch mt im sly mu cho mt tn hiu mu.

Trong im nh u ly mu tn hiu chi v cc tn hiu mu, ba im nh tip sau ch lymu chi, khng ly mu cc tn hiu mu.

42. Tiu chun ly mu 4:1:1 c:

Cc tn hiu chi, cc tn hiu mu c ly mu ti tt c cc im ly mu trn dng tch ccca tn hiu Video.

im u ly mu tn hiu chi v cc tn hiu mu, im k tip ch ly mu tn hiu chi, khngly mu cc tn hiu mu, im sau na li ly mu ue c tn hiu chi v cc tn hiu mu.

Ly mu tn hiu chi ti tt c cc im ly mu, cn cc tn hiu mu th c cch mt im s

ly mu cho mt tn hiu mu.Trong im nh u ly mu tn hiu chi v cc tn hiu mu, ba im nh tip sau ch lymu chi, khng ly mu cc tn hiu mu.

43. Tc dng d liu khi ly mu 8 bit ca h PAL theo tiu chun 4:4:4 l bao nhiu?

249 Mbit/s

349 Mbit/s

259 Mbit/s

269 Mbit/s


211 Mbit/s

311 Mbit/s

411 Mbit/s

421 Mbit/s


166 Mbit/s167 Mbit/s

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Bng bi s ca tn s ng b mnh.

Bng bi s ca tn s sng mang mu.

Chng 3. K thut nn nh s

60. DPCM l phng php:

M ho thng tin c bin mi mu.

M ho thng tin khng c bin mi mu.M ho thng tin c bin chnh lch gia mu cho v tr d bo c to t cc mu trc.

M ho thng tin khng c bin chnh lch gia mu cho v tr d bo c to t cc mutrc .

61. Vic to tn hiu d bo ca DPCM trong mnh da trn:

Mi lin kt gia cc im nh.

S d tha tm sinh l.

S d tha m.

Mi lin kt gia cc nh.

62. Phng php DPCM gia cc mnh s dng:

M ho gin tip s chnh lch gia cc mnh k nhau.

M ho trc tip s chnh lch gia cc mnh k nhau.

M ho gin tip s chnh lch gia hai mnh cch nhau.

M ho trc tip s chnh lch gia hai mnh cch nhau.

63. c im ca phng php nn trong nh l:

S dng thng tin ca nh trc nh ang xt.

S dng thng tin ca nh sau nh ang xt.

S dng thng tin ca cc nh trc v sau nh ang xt.

Khng s dng thng tin ca cc nh trc v sau nh ang xt.

64. Bin i DCT:

Bin i d liu dng bin thnh dng tn s.

Bin i d liu dng tn s thnh dng bin .

Bin i d liu dng bin thnh dng pha.

Bin i d liu dng pha thnh dng tn s.

65. Phn t mt chiu trong khi DCT:

L tng ca cc phn t trong khi

L trung bnh cng ca cc phn t trong khi

L tng ca cc phn t trn ng bin ca khi

L trung bnh cng ca cc phn t trn ng bin ca khi

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66. Cc php tnh DCT c thc hin trong phm vi:

Tng im nh.

Cc khi c kch thc 8x8.

Ton b frame nh.

Khi c kch thc tu .

67. Thc hin qut zig- zag khi m ho entropy trong phng php nn trong nh nhm mc ch

g?Tng chui cc gi tr 0, t tng hiu qu nn khi dng m RLC.

Tng chui cc gi tr 1, t tng hiu qu nn khi dng m RLC.

Tng chui cc gi tr 0, t tng hiu qu nn khi dng m Huffman.

Tng chui cc gi tr 1, t tng hiu qu nn khi dng m Huffman.

68. Tiu chun JPEG c thc hin bi cc mode m ha no?

M ha tun t, m ha ly tin, m ha c tn hao, m ha phn cp

M ha tun t, m ha ly tin, m ha khng tn hao, m ha phn cpM ha xen k, m ha ly tin, m ha khng tn hao, m ha phn cp

M ha xen k, m ha ly tin, m ha c tn hao, m ha khng phn cp

69. Cu trc s liu video JPEG gm nhng cp no?

n v s liu, n v m ha nh nht, on m entropy, qut, khung hnh, lp nh




70. c im ca nn lin nh l:

Xp x chuyn ng.

B chuyn ng.

Chnh xc chuyn ng.

Xp x v b chuyn ng.

71. Nn lin nh da trn:

S d tha thng tin trong min thi gian.S d tha m.

S d tha thng tin trong min tn s.

S d tha thng tin trong min bin .

72. Th no l nh loi P?

L nh c m ha c b chuyn ng t nh I hoc B pha trc

L nh c m ha c b chuyn ng t nh I hoc P pha trc

L nh c m ha c b chuyn ng t nh B hoc P pha trcL nh c m ha c b chuyn ng t nh B pha trc

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MPEG-2 v MPEG-3

MPEG-2 v MPEG-4

MPEG-1 v MPEG-4

80. Chun MPEG-1 v MPEG-2 bao gm nhng phn no?

ng b, Video, Audio, M ha

Kim tra, Video, Audio, M ha

H thng, Picture, Video, Audio

H thng, Video, Audio, Kim tra

81. Khc bit chnh gia MPEG-1v MPEG-2 l g?

MPEG-2 khng c kh nng x l chui Video xen k.

MPEG-2 c kh nng x l chui Video xen k.

MPEG-1 c kh nng x l chui Video.

MPEG-1 khng h tr nn d liu Audio

82. Chun MPEG-4 c c im g khc so vi MPEG-2?

Tc bit cao, t l nn cao

Tc bit thp, t l nn cao

Tc bit cao, t l nn thp

Tc bit thp, t l nn thp

83. Cu trc s liu video MPEG-1 v MPEG-2 bao gm cc lp no?

im nh, khi, mng, nh, nhm nh, on videoKhi, t hp khi, im nh, nh, nhm nh, on video

nh loi I, nh loi P, nh loi B, nh loi D, nhm nh, on video

Khi, t hp khi, mng, nh, nhm nh, on video

84. Trong k thut nn c tn hao:

S bit/pixel = entropy

S bit/pixel > entropy

S bit/pixel < entropy

S bit/pixel entropy

85. Tn hiu dither c s dng trong qu trnh no?

Ly mu tn hiu Video.

Lng t ho tn hiu Video.

M ho tn hiu Video.

Bin i s- tng t tn hiu Video.

86. Trong k thut nn khng tn hao:S bit/pixel = entropy

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S bit/pixel > entropy

S bit/pixel < entropy

S bit/pixel entropy

87. Nn trong nh nhm mc ch g?

Gim bt thng tin d tha ca nh theo thi gian

Gim bt thng tin d tha trong min khng gian

Gim d tha m

Gim bt thng tin d tha ca nh theo thi gian, khng gian v m

88. Trong s cc phn t ca nh 3, biu tng no c lng thng tin ln nht?

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

Biu tng 3

Biu tng 2

Biu tng 1

Bng nhau

89. Khi so snh lng thng tin ca cc nh 1, 2 v 3, biu thc no sau y l ng?

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(nh 1) = (nh 2) = (nh 3)

(nh 1) > (nh 3) > nh 2)

(nh 1) = (nh 3) > (nh 2)

(nh 1) = (nh 3) < (nh 2)


C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

Biu tng A

Biu tng B

Biu tng C

Bng nhau

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91. Cc lin kt ca phn t nh c bi m nh 3 c cc gi tr nh th no?

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(2, 3, 3, 2)

(3, 1, 2, 1)(2, 3, 3, 3)

(3, 3, 2)

92. Cc lin kt cho ca phn t nh c bi m nh 3 c cc gi tr nh th no?

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3(2, 3, 3, 2)

(3, 1, 2, 1)

(2, 3, 3, 3)

(3, 3, 2)


C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(1, 1, 1, 1)

(1, 0, 1, 0)

(0, 0, 0, 0)

(0, 1, 0)


C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(1, 1, 1, 1)

(1, 0, 1, 0)

(0, 0, 0, 0)

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(0, 1, 0)


C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(B, C, C, A)

(C, A, C, A)

(B, B, C, C)

(B, C, C)


C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

(B, C, C, A)

(C, A, C, A)

(B, B, C, C)

(B, C, C)

97. Theo phng php m ha Shannon-Fano, cc biu tng trong nh 1 c m ha nh sau:

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

A: 10, B: 00, C: 1

A: 00, B: 10, C: 11

A: 10, B: 11, C: 0

A: 10, B: 01, C: 11

98. Theo phng php m ha Huffman, cc biu tng trong nh 1 c m ha nh sau:

C B A C 0 0 0 0 3 3 1 2

B C C A 1 1 1 1 2 3 3 3

A C C A 0 0 0 0 1 2 2 3

nh 1 nh 2 nh 3

A: 01, B: 00, C: 1

A: 10, B: 00, C: 0A: 01, B: 10, C: 00

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A: 10, B: 01, C: 11


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

Biu tng 3

Biu tng 2

Biu tng 1

Bng nhau

100. Khi so snh lng thng tin ca cc nh 4, 5 v 6, biu thc no sau y l ng?

B A A B 1 0 1 0 3 1 1 1A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

(nh 4) = (nh 5) = (nh 6)

(nh 4) > (nh 6) > (nh 5)

(nh 6) = (nh 4) > (nh 5)

(nh 6) = (nh 4) < (nh 5)


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

Biu tng A

Biu tng B

Biu tng C

Bng nhau


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

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(3, 1, 2, 2)

(1, 3, 1, 3)

(1, 1, 1, 1)

(1, 3, 1)


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

(3, 1, 2, 2)

(1, 3, 1, 3)

(1, 1, 1, 1)

(1, 3, 1)


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

(0, 1, 0, 1)

(0, 1, 1, 1)

(0, 0, 0, 0)(1, 0, 0)


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3

A C C A 0 0 0 0 2 1 2 3

nh 4 nh 5 nh 6

(0, 1, 0, 1)(0, 1, 1, 1)

(0, 0, 0, 0)

(1, 0, 0)


B A A B 1 0 1 0 3 1 1 1

A B B A 0 1 0 1 1 3 1 3A C C A 0 0 0 0 2 1 2 3

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Chng 4. K thut nn audio s

110. Tn s ly mu tn hiu Audio trong truyn hnh s cho cc ng dng ghi v lu tr tn hiu?

32 KHz.

48 KHz

44,1 KHz

64 KHz KHz

111. Tn s ly mu tn hiu Audio trong truyn hnh s cho cc ng dng truyn dn?

32 KHz.

48 KHz

44,1 KHz

64 KHz KHz

112. Tn s ly mu tn hiu Audio cho truyn thanh Audio qung b?

32 KHz.48 KHz

44,1 KHz

64 KHz KHz

113. Tn s 32 kHz c s dng ly mu m thanh trong lnh vc no?

Dng cho cc studio cht lng cao

Cho cc h thng VTRs hoc Compact Disc

Pht sng ti tn s FMCho tn hiu thoi

114. Tn s 44,1 kHz c s dng ly mu m thanh trong lnh vc no?

Dng cho cc studio cht lng cao


Pht sng ti tn s FM

Cho tn hiu thoi

115. Tn s 48 kHz c s dng ly mu m thanh trong lnh vc no?Dng cho cc studio cht lng cao


Pht sng ti tn s FM

Cho tn hiu thoi

116. Tiu chun nn Audio MPEG2 c tn s ly mu tng ng cc lp l bao nhiu?

32 kHz; 44,1 kHz; 48 kHz

31,5 kHz; 38 kHz; 44,1 kHz16 kHz; 22,05 kHz; 24 kHz

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13,5 kHz; 14,3 kHz; 17,7 kHz

117. Cc k thut nn s liu Audio chnh:

M ha d on trong min thi gian v m bin i trong min thi gian

M ha d on trong min thi gian v m bin i trong min thi gian

M ha d on trong min tn s v m bin i trong min tn s

M ha d on trong min thi gian v m bin i trong min tn s

118. Tiu chun nn Audio MPEG1 c tn s ly mu tng ng cc lp l bao nhiu?

32 kHz; 44,1 kHz; 48 kHz

31,5 kHz; 38 kHz; 44,1 kHz

16 kHz; 22,05 kHz; 24 kHz

13,5 kHz; 14,3 kHz; 17,7 kHz

119. Trong qu trnh s ha Audio, ly mu tn s cao (oversampling) nhm mc ch g?

Ci thin ch tiu cht lng cc b bin i A/D, cho php gim li lng t v bin thnhphn chng ph.

Ci thin ch tiu cht lng cc b bin i D/A, cho php gim li lng t v bin thnhphn chng ph.

Ci thin ch tiu cht lng cc b bin i A/D v D/A, cho php tng mc lng t v bin thnh phn chng ph.

Ci thin ch tiu cht lng cc b bin i A/D v D/A, cho php gim li lng t v bin thnh phn chng ph.

120. Mi khi (block) ca d liu audio theo giao thc AES/EBU gm bao nhiu khung?

96

48

128

192

121. Thi gian tn ti mt khi (block) audio AES/EBU l:

500 s

1000 s

3000 s

4000 s

122. c im ca tn hiu s liu AES/EBU?

Ti tn s ly mu 48 kHz, tc dng d liu tng cng l 3,072 Mbps. Sau khi m ha BPM,tc d liu tng gp i l 6,144 Mbps.

Ti tn s ly mu 44,1 kHz, tc dng d liu tng cng l 3,072 Mbps. Sau khi m ha BPM,tc d liu tng gp i l 6,144 Mbps.

Ti tn s ly mu 44,1 kHz, tc dng d liu tng cng l 4,233 Mbps. Sau khi m ha BPM,tc d liu tng gp i l 8,466 Mbps.

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Ti tn s ly mu 32 kHz, tc dng d liu tng cng l 2,048 Mbps. Sau khi m ha BPM,tc d liu tng gp i l 4,096 Mbps.

123. c im ca tn hiu s liu AES/EBU?

Mi khung s liu audio bao gm 64 bits v c gi i trong 20,83 s

Mi khung s liu audio bao gm 32 bits v c gi i trong 163 s

Mi khung s liu audio bao gm 32 bits v c gi i trong 20,83 s

Mi khung s liu audio bao gm 64 bits v c gi i trong 163 s

124. H thng nn Audio s theo tiu chun AC3 gm nhng bc no?

Lng t ha, lc bng phn tch, bit ch nh

Lng t ha, ly mu, m ha

Ly mu, lng t ha, m ha

Lc bng phn tch, bit ch nh, lng t ha

125. H thng gii nn Audio s theo tiu chun AC3 gm nhng bc no?Gii lng t ha, lc bng tng hp, bit ch nh

Gii lng t ha, khi phc mu, gii m ha

Khi phc mu, gii lng t ha, gii m ha

Bit ch nh, gii lng t ha, lc bng tng hp

126. Cu trc ca 1 khung ng b AC-3?

CRC, SI, BSI, AB, AUX

AUX, CRC, SI, BSI, AB

SI, BSI, AB, AUX, CRC

BSI, SI, AUX, AB, CRC

Chng 5. Cc phng php truyn dn tn hiu truyn hnh s

127. K thut M-PSK c c im g?

Thng tin c truyn i di dng cc bt v biu tng

Thng tin c truyn i di dng cc chui bit

Thng tin c truyn i di dng tng t

Thng tin c truyn i di dng cc biu tng

128. H thng DVB m ha hnh nh v m thanh theo tiu chun no?

m thanh MPEG-1, hnh nh MPEG-2




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129. H thng DVB S s dng m g sa sai?

M Reed-Solomon

M cun Viterbi

M Reed-Solomon v m cun Viterbi

M Reed-Solomon, m cun Viterbi v m vng xon

130. H thng DVB T dng k thut iu ch tn hiu g?

OFDMCOFDM

PCM

DPCM

131. Tiu chun DVB C p dng cho h thng no?

Truyn hnh s v tinh

Truyn hnh s mt t

Truyn hnh s bng cpTt c cc h thng truyn hnh s

132. Tiu chun DVB S p dng cho h thng no?

Truyn hnh s v tinh

Truyn hnh s mt t

Truyn hnh s bng cp

Tt c cc h thng truyn hnh s

133. Tiu chun DVB T p dng cho h thng no?

Truyn hnh s v tinh

Truyn hnh s mt t

Truyn hnh s bng cp

Tt c cc h thng truyn hnh s

134. So vi h thng truyn hnh v tinh, h thng truyn hnh cp hu tuyn c u im g?

Tuyn tnh hn v cho t l S/N cao

Khng b nh hng bi nhiu v ting vng, s lp li ca tn hiu

Tuyn tnh hn v khng b nh hng bi nhiu v ting vng

Cho t l S/N cao v khng b nh hng bi nhiu v ting vng

135. So vi h thng truyn hnh v tuyn MMDS, h thng truyn hnh cp hu tuyn c c img?

Khng b hn ch vng ph sng

D dng trin khai v lp t

Kh khn trong vic cung cp cc dch v truyn hnhChu nh hng mnh bi nhiu cng nghip

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143. Gc ngng ca v tinh l g?

Gc gia v tr kinh tuyn tng ng ca v tinh so vi kinh tuyn khng

Gc nhn t mt im trn mt t ti v tinh so vi ng chn tri

Gc gia v tr kinh tuyn tng ng ca v tinh so vi ng chn tri

Gc nhn t mt im trn mt t ti v tinh so vi kinh tuyn khng

144. Gc phng v ca v tinh l g?

Gc nhn t mt im trn mt t ti v tinh so vi ng chn triGc gia v tr kinh tuyn tng ng ca v tinh so vi ng chn tri

Gc nhn t mt im trn mt t ti v tinh so vi kinh tuyn khng

Gc gia v tr kinh tuyn tng ng ca v tinh so vi kinh tuyn khng

145. Cc tn hiu hnh v ting ca mi chng trnh trong knh truyn tn hiu truyn hnh s quav tinh c nn theo tiu chun no?

MPEG-1

MPEG-2MPEG-3

MPEG-4

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