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251:(also known as a magic eye or IR blaster). The transmitter is responsible for transmitting or broadcasting a connected audio-video device, while the receiver outputs that transmitted audio-video signal to a connected television. The remote control relay permits infrared remote controls to operate the equipment whose output is being transmitted.
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A subscriber may wish to distribute TV to other televisions in the home and there is no limit to the number of TVs that can display the same signal. How the subscriber chooses to distribute his TV signals within his home is constantly changing. With an increasing number of TV displays around the home
474:) and is generally used for short-range applications (typically 10 metres (33 ft) or less) where a simple link is required from the source device to a monitor or television. As such, it is generally unsuitable for video sender applications that would require a signal to be sent to another room.
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Video senders that operate on existing Wi-Fi networks have recently been developed and provide another interference free method of transmitting audio and video. Bandwidth over the Wi-Fi network will be shared between the video sender and all other connected devices, which can cause issues when used
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Transmitting signals wirelessly requires the product to be tested to relevant standards for wireless license exemption, these products are generally limited to 100 mW (10 mW in the UK) and for higher power models, used generally within the broadcasting industry, a licence is required. If
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Spread-spectrum techniques are methods by which a signal is deliberately spread in the frequency domain, resulting in a signal with a wider bandwidth. Within the video sender market, these techniques allow for a wireless signal to be transmitted with much less chance of interference from, and to,
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Some manufacturers use proprietary spread-spectrum techniques, enabling typical operational ranges of up to 80 metres (260 ft) in-building. By also employing externally mounted antennas, operational ranges in excess 2,000 metres (6,600 ft) (clear line-of-sight) have been achieved and
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or within the subscribers property. Generally, broadcasting copyright material (which applies to just about all broadcast channels) for viewing by members of the public is illegal. There have been a number of test cases where the rebroadcast of subscription channels and off-air channels to
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technologies as the available bandwidth is so high. Due to the fact that they operate on the local Wi-Fi network, their range is limited, however Wi-Fi based video senders also allow for other interesting technologies to be included. These include technologies that allow for mobile device
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It is not uncommon for several Wi-Fi networks to be within range of a typical home and as such, spread-spectrum based video senders are often the best solution for transmitting audio and video signals within this crowded wireless environment.
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Typical video sender applications include the transmission of television audio and video signals from a lounge to a bedroom or from a CCTV camera to a display, as well as interconnecting appliances with audio, video and
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circuits to send the audio and video signals. This provides similar benefits to a wireless video sender i.e. no additional cabling, as well as the ability to transmit in high-definition and even
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to local Wi-Fi networks and, in some cases, Wi-Fi networks can cause picture interference on the video sender signal. More information can be found in the article on
494:, now exist that make use of existing networks, providing a wired video sender solution for distributing audio, video and internet connectivity around the home.
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As connectivity standards have changed in the television and audio-video markets, so it has in the video sender market, with older models usually featuring
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FM subcarriers added to the composite video baseband. These different channels can often be used to overcome the adverse effects of nearby WiFi networks.
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IR remote "carrier". ASK/OOK schemes such as RC5 and RC6 work best over the RF link as the receiver uses a data slicer and AGC designed for ASK/OOK with
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and a need for greater resolution the options continue to grow. Users are permitted to distribute copyright material provided it is being viewed by the
294:. To avoid this, some video senders now use a spread-spectrum technology and can co-exist with wireless networks and share available bandwidth.
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or via similar IP technologies, such as the internet, then using streaming technology does not require a license. The regulator is the
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Analogue wireless video senders can achieve typical operating distances of up to 60 metres (200 ft) (clear line of sight) with
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in another part of a property and provides an alternative to cable installations. Professional film sets use devices like the
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high-definition video (HD), audio, power, home networking, Ethernet, USB, and some control signals, over a common category (
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Early digital video sender models typically transmitted in DVD quality, but more recent models are capable of achieving
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A typical video sender kit containing a transmitter, receiver, magic eye and a remote control to select the input.
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of video senders. The first is the manner in which the signal is being transmitted and the second relates to the
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Analogue video senders have the advantage of low manufacturing costs as the audio and video signals are simply
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from one location to another. It is most commonly used for sending the output of a source device, such as a
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regulates interstate and international communications by radio, television, wire, satellite and cable.
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Ultra-wideband is a technology for transmitting information spread over a large bandwidth (>
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Digital video senders are quickly becoming the most popular solution and combine the use of a
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Agencies responsible for the enforcement of wireless telegraphy equipment are as follows:
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with older networking technologies, however this is not a problem with more recent
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In 2010 a new standard for cabled applications was released called HDBaseT a
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Several video sender technologies, such as power-line communication and
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Most video sender systems will consist of three separate components, a
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Usually there are four FM transmit channels, A, B, C & D, with
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Video senders using power-line communication make use of existing
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who are responsible for the efficient use of radio bandwidth.
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content of the material being transmitted such as DVDs and
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A wide range of video sender technologies exist, including
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several such models are sold under the Digi-Sender brand.
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Device for transmitting audio and video signals wirelessly
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Rear views of a spread-spectrum transmitter and receiver.
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The reverse remote control channel is usually fixed at
686:"What are the Components of a Camera Rental Package?"
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as their key means of connection to host equipment.
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486:Example of how a power-line video sender works.
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219:Video senders have been a frequent cause of
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109:Learn how and when to remove this message
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141:) is a device for transmitting domestic
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292:electromagnetic interference at 2.4 GHz
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360:quality (720x576) video
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717:Consumer electronics
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43:improve this article
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351:Manchester encoding
236:(IP) requirements.
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364:and stereo audio.
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41:Please help
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672:References
586:subscriber
362:resolution
208:networks.
188:wireless (
180:wireless (
159:television
151:wirelessly
127:DigiSender
69:newspapers
651:‹See Tfd›
548:copyright
288:bandwidth
276:modulated
135:AV sender
711:Category
544:legality
538:Legality
443:Miracast
438:802.11ac
382:decoding
378:encoding
245:receiver
227:Overview
206:Ethernet
178:analogue
149:signals
642:Germany
514:HDBaseT
492:HDBaseT
447:AirPlay
434:802.11n
284:5.8 GHz
280:2.4 GHz
258:and/or
186:digital
163:Teradek
83:scholar
664:BNetzA
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169:or a
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143:audio
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620:and
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