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提问人：网友ty2020 发布时间：2022-01-07
[主观题]

Video bandwidth is realted to the highest work fre

quency of the monitor lt is from（）

A、five MHZ to hundreds MHZ

B、tens MHZ to twnty MHZ

C、tens MHZ to hundreds MHZ

D、tens MHZ to thousands MHZ

简答题官方参考答案 （由简答题聘请的专业题库老师提供的解答）
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更多“Video bandwidth is realted to the highest work fre”相关的问题
第1题
The resolution of ultra high definition television （UHDTV) is 3840×2160 and the fresh rate

The resolution of ultra high definition television (UHDTV) is 3840×2160 and the fresh rate is 60 Hz. For each pixel, the quantization levels of different color samplings (R, G, B) are all set to 4096. Then, the number of bits per second required to transmit for this video signals is ________, and the minimum bandwidth required to transmit this signal with raised-cosine spectrum (the roll-off factor α=0.5) is ________Hz.

A、16.7G, 25G

B、16.7G, 12.5G

C、278M, 417M

D、278M, 208.5M

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第2题
The resolution of full high definition television （Full HD) is 1920×1080 and the frame rat

The resolution of full high definition television (Full HD) is 1920×1080 and the frame rate is 60 Hz. For each pixel, the quantization levels of different color samplings (R, G, B) are all set to 4096. Then, the number of bits per second and the minimum bandwidth required to transmit this video signals are about T and W (Hz), respectively, where the channel SNR=30(dB). Hint: C=W*log2(1+SNR).

A、T=300M, W=30M

B、T=3000M, W=1000M

C、T=3000M, W=300M

D、T=1000M, W=300M

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第3题
Consequently, video encoding with high compression performance is required to overcome the huge amount of data transmission, memory storing requirement and transmission bandwidth limitation.
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第4题
Between now and 2005, 【C1】______ services will become commonplace. Business and economy-ti
es？ Web services will be introduced; and consumers will 【C2】______ their digital identities. Not only will the Net support a variety of new access devices, but it will also become the primary vehicle for voice, data and video 【C3】______ . Already, a group of communication giants, including AT＆T, 【C4】______ an alliance called Embedded Internet, which aims to accelerate the market for globally networked, intelligent devices in homes, offices and factories worldwide.

Putting everything and everyone on the Net will open up new commercial opportunities For example, when you visit a new place, your mobile device, knowing your preferences will 【C5】______ suggest the restaurants that serve your favorite wines and foods, list the shows you might like to see, then provide you with maps for how to get there, says Joy, whose company is designing Jini, a 【C6】______ system to automatically link computing devices. The new services electronically link up buyers and sellers who 【C7】______ no prior contact and may want to do business with each other only once.

These 【C8】______ will take bandwidth and lots of it. Some of the sector's biggest companies are working on making the internet 1,000 times faster and more reliable. Internet service providers will charge accordingly, just as travelers pay different 【C9】______ for first or second class. The system is supposed to give consumers flexibility, allowing them to 【C10】______ bandwidth when they need it.

【C1】______

A．personal

B．personalized

C．person

D．personalizing

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第5题
There are eight analog signals, each of bandwidth B=2kHz. Samples of these signals are tim
e-division-multiplexed, quantized and binary-coded. The step size Δ of the quantizer cannot be greater than 0.5% of the peak amplitude mmax. Then the minimum number of quantization levels should be L= . The transmission bandwidth BT is if Nyquist criterion pulse with roll-off factor r=1/3 are used, where the sampling rates must be at least 50% above the Nyqusit sampling rate.

A、L=400, BT=288 (kHz)

B、L=400, BT=576 (kHz)

C、L=200, BT=576 (kHz)

D、L=200, BT=288 (kHz)

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第6题
【Recently， telecommunication carriers has been building All-IP core networks in order to
effectively support various kinds of fixed and mobile broadband services，such as up-and down-loading You tube and SNS（Social Networking Services）with rich video file，as well as broadband mobile Internet services. Such All-IP network is called NGN（Next Generation Network），which guarantees secure authentication and QoS such as the bandwidth and the delay. From the service point of view，convergence of fixed and mobile communications，known as FMC（Fixed Mobile Convergence）is becoming a key increasing new services and expanding the market.】 Form the paragraph above，we can see that（）can be defined as a network that can effectively support various kinds of fixed and mobile broadband services，with guaranteed QoS in terms of（）and etc. And the key to develop new services and gain larger market share should be（）

A．All-IP access network B．broad band network C．NGN D．social network A．data rate B．error rate C．availability D．band width， delay A．mobile communications B．Internet C．All-IP core network D．Fixed Mobile Convergence

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第7题
what is one fact we do not learn from the final commentary of the video？A．People who can r

what is one fact we do not learn from the final commentary of the video？

A．People who can record the next eclipse.

B．The date of an upcoming solar eclipse.

C．How to record an eclipse for your posterity.

D．Where the next Christmas eclipse will occur.

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第8题
A—bitB—buffer storageC—card readerD—characterE—coderF—commandG—data processingH—to editI—t

A—bit B—buffer storage

C—card reader D—character

E—coder F—command

G—data processing H—to edit

I—to encode J—feedback

K—file L—floppy disk

M—frame N—hardware

O—inline processing P—bandwidth

Q—keyboard R—surf the internet

S—-modem T—add a contact

51. ()指令，命令 ()硬件

52. ()读卡机 ()缓冲储存器

53. ()读卡机 ()缓冲储存器

54. ()上网 ()调制解调器

55. ()软磁盘 ()比特，二进制的一位

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第9题
A—BandwidthB—BBS （Bulletin Board System)C—BrowserD—E-mailE—hitF—hackerG—homepage H—hyperli

A—Bandwidth B—BBS (Bulletin Board System)

C—Browser D—E-mail

E—hit F—hacker

G—homepage H—hyperlink

I—Internet J—ISDN(Integrated Services Digital Network)

K—ISP(Internet Service Provider) L—Modem(Modulator-demodulator)

M—netizen N—Netnews

O—Newsgroup P—spams/junk mails

Q—TCP/IP R—Telnet

S—Usenet T—WWW(World Wide Web)

51. ()垃圾邮件 ()综合业务数字网

52. ()网民 ()电脑黑客

53. ()传输控制/网际协议 ()浏览器

54. ()超级链接 ()因特网服务提供者

55. ()主页 ()电子布告栏

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第10题
If the bandwidth of a band-limited signal [图] is ...

If the bandwidth of a band-limited signalIf the bandwidth of a band-limited signal [图] is .isIf the bandwidth of a band-limited signal [图] is ., then the bandwidth of the signalIf the bandwidth of a band-limited signal [图] is .is

A、If the bandwidth of a band-limited signal [图] is .

B、If the bandwidth of a band-limited signal [图] is .

C、If the bandwidth of a band-limited signal [图] is .

D、If the bandwidth of a band-limited signal [图] is .

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