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  2. Videotelephony - Wikipedia

    en.wikipedia.org/wiki/Videotelephony

    A telepresence system in 2007. Videotelephony (also known as videoconferencing or video calling) is the use of audio and video for simultaneous two-way communication. [1] Today, videotelephony is widespread.

  3. 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 ...

  4. 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 ...

  5. 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.

  6. Up 800% the Past Decade, Can the Momentum Continue for This ...

    www.aol.com/800-past-decade-momentum-continue...

    Intuitive Surgical continues to be one of the market's hottest stocks.

  7. High-frequency oscillations - Wikipedia

    en.wikipedia.org/wiki/High-frequency_oscillations

    Traditional classification of the frequency bands, that are associated to different functions/states of the brain and consist of delta, theta, alpha, beta and gamma bands. . Due to the limited capabilities of the early experimental/medical setup to record fast frequencies, for historical reason, all oscillations above 30 Hz were considered as high frequency and were difficult to investigate.

  8. Comparison of web conferencing software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_web...

    Unified Communications (UC) is a marketing buzzword describing the integration of real-time, enterprise, communication services such as instant messaging (chat), presence information, voice (including IP telephony), mobility features (including extension mobility and single number reach), audio, web & video conferencing, fixed-mobile ...

  9. UHF television broadcasting - Wikipedia

    en.wikipedia.org/wiki/UHF_television_broadcasting

    For analog signals in the United States, VHF signals on channels 2 to 6, the low-VHF range, were limited to 100 kW, high-VHF on channels 7 to 13 to 316 kW, and UHF to 5 MW, well over 10 times the power of the low-VHF transmitter power limit. This greatly increased the cost of transmitting in these frequencies, both in electrical cost as well as ...

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