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参考答案和解析
正确答案:是指电视信号的采集、编辑到传播接收的整个广播链路均数字化了的电视广播系统。
更多“数字电视(Digital TV)”相关问题
  • 第1题:

    Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on ANSWER SHEET I. ( 10 points)

    Digital photography is still new enough that most of us have yet to form. an opinion about it, (1) develop a point of view. But this bash' t stopped many film and computer fans from agreeing (2) the early conventional wisdom about digital cameras—they' re neat (3) for you? But they're not suitable for everyday picture taking.

    The fans are wrong: Moro than anything else, digital cameras are radically (4) what photography means and what it can be. The venerable medium of photography (5) we know it is beginning to seem out of (6) with the way we live. In our computer and camcorder (7) saving pictures as digital (8) and watching them on TV is no less practical—and in many ways more (9) than fumbling with rolls of film that must be sent off to be (10)

    Paper is also terribly (11) . Pictures that are incorrectly framed, (12) ,or lighted are nonetheless committed to film and ultimately processed into prints.

    The digital medium changes the (13) . Still images that are (14) digitally can immediately be shown on a computer (15) , a TV screen, or a small liquid - crystal display (LCD) built fight into the camera. And since the points of light that (16) an image are saved as a series of digital bits in electronic memory, (17) being permanently etched onto film, they can be erased, retouched, and transmitted (18) .

    What's it like to (19) with one of these digital cameras? It's a little like a first date--exciting, confusing and fraught with (20) .

    1. A) rather than

    B) let alone

    C) much less

    D) so as to


    正确答案:C
    答案:C
    [试题分析]考查上下文的分析。
    [详细解答]develop a point of view显然比form. an opinion a bout it要更进一步,因此,既然后者还不行,前者当然是 much less(更少,不及)。所以答案为C。rather than胜于; let alone更不用说(后常接名词);so as to使得,以致。

  • 第2题:

    What would be the best title for the passage?

    A.TV Will Rule the World

    B.TV Will Disturb the World

    C.TV Will Better the World

    D.TV Will Remain in World


    正确答案:C

  • 第3题:

    R1501入口温度可用()来控制.

    • A、TV1501
    • B、TV1504
    • C、TV1507
    • D、TV1501

    正确答案:B

  • 第4题:

    ()全称为Digital Video Broadcasting Handheld,它是欧洲的数字电视标准组织(DVB)为通过地面数字广播网络向便携/手持终端提供多媒体业务所制定的传输标准。


    正确答案:DVB-H

  • 第5题:

    数字电视和高清数字电视有什么区别?是否都是数字电视?


    正确答案:DTV是数字电视,即全数字信号处理、压缩/解压缩、传输/接收。HDTV(数字高清析度电视)是DTV的一个子类。也是数字电视(DTV)标准中最高级的一种。

  • 第6题:

    DVD的英文全名是()。

    • A、digital Video disc
    • B、digital video disk
    • C、digital view disk
    • D、dec video disc

    正确答案:B

  • 第7题:

    看数字电视需要购买数字电视机吗?


    正确答案:收看标准清晰度数字电视,用户无须购买新的数字电视机,只需加装一个数字机顶盒,就可以收看数字电视节目了。数字机顶盒已将数字信号转成了模拟信号,适用于模拟电视机的接收。因此即使你用的是最老式的黑白电视机,只要拥有音、视频输入接口就可以通过机顶盒收看数字电视节目。当然,分辨率越高的电视越可以突现数字电视高品质的画面质量。

  • 第8题:

    DVB.S的含义是()。

    • A、卫星数字电视广播
    • B、电缆数字电视广播
    • C、光纤数字电视广播
    • D、地面数字电视广播

    正确答案:A

  • 第9题:

    Birthday attacks are used against which of the following?()

    • A、 digital signatures
    • B、 symmetric ciphering
    • C、 hashalgoritms
    • D、 asymmetric ciphering
    • E、 digital certificates

    正确答案:C

  • 第10题:

    填空题
    ()全称为Digital Video Broadcasting Handheld,它是欧洲的数字电视标准组织(DVB)为通过地面数字广播网络向便携/手持终端提供多媒体业务所制定的传输标准。

    正确答案: DVB-H
    解析: 暂无解析

  • 第11题:

    填空题
    我国数字电视标准以欧标DVB为主,具体而言,卫星数字电视标准:DVB-S,有线数字电视标准DVB-C,地面数字电视标准()。

    正确答案: DVB-T
    解析: 暂无解析

  • 第12题:

    名词解释题
    数字电视(Digital TV)

    正确答案: 是指电视信号的采集、编辑到传播接收的整个广播链路均数字化了的电视广播系统。
    解析: 暂无解析

  • 第13题:

    is a one -way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

    (72) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.

    (73) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.

    (74) is a device used to connect two separate network that use different communication protocol.

    (75) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

    A.MD

    B.RSA

    C.DES

    D.MIB


    正确答案:A

  • 第14题:

    数字电视按照所呈现图像的清晰度从高到低可分为()数字电视、标准清晰度数字电视和低清晰度数字电视三类。
    高清晰度

  • 第15题:

    DDN是()的缩写。

    • A、Digital Data Net
    • B、Digital Data Network
    • C、Digital Date Net
    • D、Digital Date Network

    正确答案:B

  • 第16题:

    我国数字电视按信号传输方式可分为()、卫星传输数字电视、有线传输数字电视。


    正确答案:地面无线传输数字电视

  • 第17题:

    数字电视与数字电视机关系如何?


    正确答案:准确地说,数字电视是指用数字技术对电视信号进行处理、传输、存储、记录、接收及控制的系统。而数字电视机是指在不改变现行传输体制的前提下,对视频信号和音频信号进行数字处理的电视接收机。前者是指一整套系统,后者仅是一种设备,是前者的一个分支。

  • 第18题:

    看数字电视一定需要购买数字电视机。


    正确答案:错误

  • 第19题:

    我国数字电视标准以欧标DVB为主,具体而言,卫星数字电视标准(),有线数字电视标准(),地面数字电视标准()。


    正确答案:DVB-S/S2;DVB-C/C2;DVB-T/DTMB

  • 第20题:

    Which statement is true about the digital to analog conversion process?()

    • A、the two steps of digital to analog conversion are decompression and reconstruction of the analog signal
    • B、the two steps of digital to analog conversion are decoding and filtering
    • C、the two steps of digital to analog conversion are decompression and filtering of the analog signal
    • D、the two steps of digital to analog conversion are quantization and decoding

    正确答案:B

  • 第21题:

    填空题
    我国数字电视按信号传输方式可分为()、卫星传输数字电视、有线传输数字电视。

    正确答案: 地面无线传输数字电视
    解析: 暂无解析

  • 第22题:

    单选题
    Which statement is true about the digital to analog conversion process?()
    A

    the two steps of digital to analog conversion are decompression and reconstruction of the analog signal

    B

    the two steps of digital to analog conversion are decoding and filtering

    C

    the two steps of digital to analog conversion are decompression and filtering of the analog signal

    D

    the two steps of digital to analog conversion are quantization and decoding


    正确答案: C
    解析: 暂无解析

  • 第23题:

    填空题
    数字电视按照所呈现图像的清晰度从高到低可分为()数字电视、标准清晰度数字电视和低清晰度数字电视三类。

    正确答案: 高清晰度
    解析: 暂无解析