Wireless HDMI

Overview and Operation

Wireless HDMI is a colloquial term for wireless high-definition audio and video signal connectivity on consumer electronics products. Currently, most HD wireless transmission technologies use unlicensed 5 GHz, 60 GHz or 190 GHz radio frequencies. This technology allows the viewer to transmit video and audio signals between a component device (Blu-Ray player, game console, set-top box, etc.) and display device wirelessly, without the need for an HDMI cable.[1]

Wireless HDMI operates by converting the signal from an HDMI cable into a radio frequency which is then broadcast across the wireless spectrum.[2] This allows the video source to be in a completely different room than the display device, and it helps users keep viewing areas clear and free of cable clutter.[2]

Examples
  • Proprietary protocols for wireless transmission, e.g., LG "Wireless 1080p", Philips "Wireless HDTV Link", Sony "Bravia Wireless Link", Asus "Wireless Display Connectivity", etc.
  • Proprietary video compression schemes that work over 802.11n and similar wireless interfaces
  • WirelessHD
  • Wireless Home Digital Interface
  • WiGig
  • Asus WAVI (Wireless Audio Video Interaction) wireless HDMI use 4 x 5 MIMO-channels with Two-Way Wireless USB Control.[3]
  • In 2010, Toshiba began marketing the first Wireless HDTV (aka WiDi) device.

History

Development of wireless HDMI systems began to increase throughout the early 2000s. In late 2006, TZero Technologies and Analog Devices claimed to have created a wireless HDMI interface.[4] This consisted of a transmitter and a receiver, and it was expected to cost less than an HDMI cable by the time it reached commercial production.[4] At CES in 2007, manufacturer Philips debuted what is considered to be the first publicly available wireless HDMI system, a two-piece transmitter/receiver unit that was capable of wirelessly transmitting a 1080P signal within a 25-foot range.[5] This unit retailed for between $299 and $399.[6] By 2008, alternatives to this earlier developed standard were being considered, with Audiovox offering the HD Powerlink system, a device that was able to transmit a video signal through household electric power lines, removing the need for HDMI altogether.[7] However, these early devices were often problematic – short in range, intermittent in operation, and unable to support higher than 1080i resolution. Later examples of wireless HDMI systems include the Belkin Screencast AV 4 and the Pro.2 WHDMI AV Sender Kit.[8]

Modern Developments

Wireless HDMI systems have steadily grown in popularity. Supporters of this technology claim that it’s beneficial for the use of projectors – citing its low cost compared to custom projector mounting solutions, as well as its ease of use.[2] However, with the introduction of streaming sticks such as Amazon’s Fire TV and Google’s Chromecast into the market, users are also opting for this option.[2] Streaming sticks come with their own remotes and user interfaces, allowing them to function as an all-in-one solution, something wireless HDMI systems cannot do.[2] Despite the advent of streaming sticks, there are still developments in the area of wireless HDMI technology. For example, in 2020, a patent was sought by Shenzhen Lenkang Technology for a new form of Wireless HDMI system.[9] This new device is to be smaller, utilizing a pin layout rather than a traditional power supply.[10] The HDMI transmitter would be able to receive power through a custom HDMI interface, eliminating the need for a separate power supply, and reducing the size of the unit.[11]

See also

IP based

Cables for mobile equipment

References
  1. admin (2018-06-27). "Wireless Video HDMI: What it Is and Why to Start Using It". ScreenBeam. Retrieved 2023-02-27.
  2. Matthes, Jonah (2019-04-06). "Wireless HDMI: Everything You Need to Know Before Buying". The Home Theater DIY. Retrieved 2023-02-27.
  3. "Asus WAVI HDMI". Retrieved 2011-05-06.
  4. Conte, Natali Del (2006-09-05). "Tzero, ADI Sample Wireless HDMI Prototype; On Tuesday, Tzero Technologies and Analog Devices announced that they have created a wireless HDMI interface for HDTVs, next-gen DVD players, and set-top boxes". ExtremeTech.com: 1. Retrieved 2023-03-07.
  5. Scoblete, Greg; Laposky, John (2007-01-22). "Philips Debuts Wireless HDMI System At CES". TWICE: This Week in Consumer Electronics. 22 (2): 42–42. ISSN 0892-7278. Retrieved 2023-02-27.
  6. Scoblete, Greg; Laposky, John (2007-01-22). "Philips Debuts Wireless HDMI System At CES". TWICE: This Week in Consumer Electronics. 22 (2): 42–42. ISSN 0892-7278. Retrieved 2023-02-27.
  7. staff, By TWICE (2008-11-14). "AR's Powerlink Offers Wireless HDMI Alternative". TWICE. Retrieved 2023-03-20.
  8. Wireless HDMI HDMI goes wIreless. Retrieved 2023-03-20.
  9. "Shenzhen Lenkeng Technology Seeks Patent for Wireless HDMI Transmitting Device and Wireless HDMI Transmitting System". Global IP News. Broadband and Wireless Network News. New Delhi, India. 2020-02-06. Retrieved 2023-03-07.
  10. "Shenzhen Lenkeng Technology Seeks Patent for Wireless HDMI Transmitting Device and Wireless HDMI Transmitting System". Global IP News. Broadband and Wireless Network News. New Delhi, India. 2020-02-06. Retrieved 2023-03-07.
  11. "Shenzhen Lenkeng Technology Seeks Patent for Wireless HDMI Transmitting Device and Wireless HDMI Transmitting System". Global IP News. Broadband and Wireless Network News. New Delhi, India. 2020-02-06. Retrieved 2023-03-07.


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