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  2. Telepresence - Wikipedia

    en.wikipedia.org/wiki/Telepresence

    A modular telepresence video conferencing system. Telepresence is the appearance or sensation of a person being present at a place other than their true location, via telerobotics or video. Telepresence requires that the users' senses interact with specific stimuli in order to provide the feeling of being in that other location. Additionally ...

  3. A typical low-cost webcam (a Microsoft LifeCam VX-3000) for use with many popular video-telecommunication programs (2009). This list of video telecommunication services and product brands is for groupings of notable video telecommunication services, brands of videophones, webcams and video conferencing hardware and systems, all related to videotelephony for two-way communications with live ...

  4. Radio spectrum - Wikipedia

    en.wikipedia.org/wiki/Radio_spectrum

    Radar-frequency bands according to IEEE standard [17] Band designation Frequency range Explanation of meaning of letters; HF: 0.003 to 0.03 GHz: High frequency [18] VHF: 0.03 to 0.3 GHz: Very high frequency [18] UHF: 0.3 to 1 GHz: Ultra-high frequency [18] L: 1 to 2 GHz: Long wave S: 2 to 4 GHz: Short wave C: 4 to 8 GHz: Compromise between S ...

  5. Videotelephony - Wikipedia

    en.wikipedia.org/wiki/Videotelephony

    Quality of service can range from low to very high, including high definition video available on the latest model webcams. A related and similar device is a TV camera which is usually small, sits on top of a TV, and can connect to it via its HDMI port, similar to how a webcam attaches to a computer via a USB port. Videophones—low to midrange ...

  6. Extremely high frequency - Wikipedia

    en.wikipedia.org/wiki/Extremely_high_frequency

    Extremely high frequency (EHF) is the International Telecommunication Union designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz). [ 1 ] [ 2 ] It is in the microwave part of the radio spectrum, between the super high frequency band and the terahertz band .

  7. VF bandwidth - Wikipedia

    en.wikipedia.org/wiki/VF_bandwidth

    In broadcast television systems, VF bandwidth, video bandwidth or more formally video frequency bandwidth is the range of frequencies between 0 and the highest frequency used to transmit a live television image.

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