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  2. RF modulator - Wikipedia

    en.wikipedia.org/wiki/RF_modulator

    The modulator is then programmed to broadcast the signals on a certain frequency. That RF broadcast is then received by the connected TV. When the TV is tuned to the programmed channel, the video and audio signal of the source device is accessed. RF modulation can become difficult in a CATV system. High pass, low pass, and notch filters must be ...

  3. Video modulation - Wikipedia

    en.wikipedia.org/wiki/Video_modulation

    Video signals are usually encoded into binary digit (0, 1) or seven digit pulse-code modulation (PCM), which is a method used to digitally represent original video signal. . The video signal converted to binary digit PCM at the point of origin can be then transmitted over existing telephone cable or wire directly to the destination

  4. Modulation - Wikipedia

    en.wikipedia.org/wiki/Modulation

    A modulator is a device or circuit that performs modulation. A demodulator (sometimes detector ) is a circuit that performs demodulation , the inverse of modulation. A modem (from mod ulator– dem odulator), used in bidirectional communication, can perform both operations.

  5. QAM (television) - Wikipedia

    en.wikipedia.org/wiki/QAM_(television)

    QAM is a modulation format and does not specify the format of the digital data being carried. However, when used in the context of US digital cable television, the format of the data transmitted using this modulation is based on ITU-T J.83 Annex B ("J.83b").

  6. NICAM - Wikipedia

    en.wikipedia.org/wiki/NICAM

    A NICAM-based stereo-TV infrastructure can transmit a stereo TV programme as well as the mono "compatibility" sound at the same time, or can transmit two or three entirely different sound streams. This latter mode could be used to transmit audio in different languages, in a similar manner to that used for in-flight movies on international flights.

  7. DVB-C - Wikipedia

    en.wikipedia.org/wiki/DVB-C

    Digital Video Broadcasting - Cable (DVB-C) is the DVB European consortium standard for the broadcast transmission of digital television over cable.This system transmits an MPEG-2 or MPEG-4 family digital audio/digital video stream, using a QAM modulation with channel coding.

  8. Video sender - Wikipedia

    en.wikipedia.org/wiki/Video_sender

    Analogue video senders have the advantage of low manufacturing costs as the audio and video signals are simply modulated onto a carrier at 2.4 GHz or 5.8 GHz.They do, however, have the adverse effect of causing reduced bandwidth to local Wi-Fi networks and, in some cases, Wi-Fi networks can cause picture interference on the video sender signal.

  9. Analog passthrough - Wikipedia

    en.wikipedia.org/wiki/Analog_passthrough

    Analog passthrough is a feature found on some digital-to-analog television converter boxes.Boxes without the analog passthrough feature only allow older, analog-only TVs to view digital TV.

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