WirelessHD, also known as UltraGig, is a proprietary standard owned by
Silicon Image (originally
SiBeam) for
wireless
Wireless communication (or just wireless, when the context allows) is the transfer of information (''telecommunication'') between two or more points without the use of an electrical conductor, optical fiber or other continuous guided transm ...
transmission of
high-definition video
High-definition video (HD video) is video of higher resolution and quality than standard-definition. While there is no standardized meaning for ''high-definition'', generally any video image with considerably more than 480 vertical scan lines ( ...
content for
consumer electronics
Consumer electronics, also known as home electronics, are electronic devices intended for everyday household use. Consumer electronics include those used for entertainment, Communication, communications, and recreation. Historically, these prod ...
products. The consortium currently has over 40 adopters; key members behind the specification include
Broadcom
Broadcom Inc. is an American multinational corporation, multinational designer, developer, manufacturer, and global supplier of a wide range of semiconductor and infrastructure software products. Broadcom's product offerings serve the data cen ...
,
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer compo ...
,
LG,
Panasonic
is a Japanese multinational electronics manufacturer, headquartered in Kadoma, Osaka, Kadoma, Japan. It was founded in 1918 as in Fukushima-ku, Osaka, Fukushima by Kōnosuke Matsushita. The company was incorporated in 1935 and renamed and c ...
,
NEC
is a Japanese multinational information technology and electronics corporation, headquartered at the NEC Supertower in Minato, Tokyo, Japan. It provides IT and network solutions, including cloud computing, artificial intelligence (AI), Inte ...
,
Samsung
Samsung Group (; stylised as SΛMSUNG) is a South Korean Multinational corporation, multinational manufacturing Conglomerate (company), conglomerate headquartered in the Samsung Town office complex in Seoul. The group consists of numerous a ...
,
SiBEAM,
Sony
is a Japanese multinational conglomerate (company), conglomerate headquartered at Sony City in Minato, Tokyo, Japan. The Sony Group encompasses various businesses, including Sony Corporation (electronics), Sony Semiconductor Solutions (i ...
,
Philips
Koninklijke Philips N.V. (), simply branded Philips, is a Dutch multinational health technology company that was founded in Eindhoven in 1891. Since 1997, its world headquarters have been situated in Amsterdam, though the Benelux headquarter ...
and
Toshiba
is a Japanese multinational electronics company headquartered in Minato, Tokyo. Its diversified products and services include power, industrial and social infrastructure systems, elevators and escalators, electronic components, semiconductors ...
. The founders intend the technology to be used for Consumer Electronic devices, PCs, and portable devices.
The specification was finalized in January 2008.
Technology
The WirelessHD specification is based on a 7 GHz channel in the 60 GHz
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). It is in the microwave part of the radio spectrum, between t ...
radio band. It allows either lightly
compressed (proprietary wireless link-aware codec) or uncompressed digital transmission of high-definition video and audio and data signals, essentially making it equivalent of a wireless
HDMI
High-Definition Multimedia Interface (HDMI) is a proprietary digital interface used to transmit high-quality video and audio signals between devices. It is commonly used to connect devices such as televisions, computer monitors, projectors, gam ...
. First-generation implementation achieves data rates from 4 Gbit/s, but the core technology allows theoretical data rates as high as 25 Gbit/s (compared to 10.2 Gbit/s for HDMI 1.3 and 21.6 Gbit/s for
DisplayPort
DisplayPort (DP) is a digital interface used to connect a video source, such as a Personal computer, computer, to a display device like a Computer monitor, monitor. Developed by the Video Electronics Standards Association (VESA), it can also car ...
1.2), permitting WirelessHD to scale to higher resolutions, color depth, and range. The 1.1 version of the specification increases the maximum data rate to 28 Gbit/s, supports common 3D formats, 4K resolution,
WPAN
WPAN (channel 53) is a television station licensed to Fort Walton Beach, Florida, United States, serving northwest Florida and southwest Alabama. Its main channel primarily airs programming from Blab TV, a locally based channel that produces ...
data, low-power mode for portable devices, and HDCP 2.0 content protection.
The 60 GHz band usually requires line of sight between
transmitter
In electronics and telecommunications, a radio transmitter or just transmitter (often abbreviated as XMTR or TX in technical documents) is an electronic device which produces radio waves with an antenna (radio), antenna with the purpose of sig ...
and
receiver, and the WirelessHD specification ameliorates this limitation through the use of
beam forming
Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception. This is achieved by combining elements in an antenna array in such a way that signals at particular angles ...
at the receiver and transmitter antennas to increase the signal's
effective radiated power
Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter. It is the total power in watts that would ha ...
, find the best path, and utilise wall reflections. The goal range for the first products will be in-room,
point-to-point, non
line-of-sight (NLOS) at up to 10 meters. The atmospheric
absorption of 60 GHz energy by oxygen molecules limits undesired propagation over long distances and helps control intersystem interference and long distance reception, which is a concern to video copyright owners.
[ ]
The WirelessHD specification has provisions for content encryption via
Digital Transmission Content Protection (DTCP) as well as provisions for network management. A standard remote control allows users to control the WirelessHD devices and choose which device will act as the source for the display.
Competition
WirelessHD competes with
WiGig in some applications. WiGig transmits in the same 60 GHz band used by WirelessHD.
See also
*
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). It is in the microwave part of the radio spectrum, between t ...
*
IEEE 802.15
*
UWB
*
Wireless HDMI:
**
Intel Wireless Display (WiDi) version 3.5 to 6.0 supports
Miracast
Miracast is a Wireless, wireless communications standard created by the Wi-Fi Alliance which is designed to transmit video and sound from devices (such as laptops or smartphones) to display receivers (such as TVs, monitors, or projectors). It uses ...
; discontinued
**
Miracast
Miracast is a Wireless, wireless communications standard created by the Wi-Fi Alliance which is designed to transmit video and sound from devices (such as laptops or smartphones) to display receivers (such as TVs, monitors, or projectors). It uses ...
**
WiGig
**
Wireless Home Digital Interface
Wireless Home Digital Interface (WHDI) is a consumer electronic specification for wireless HDTV connectivity throughout the home.
WHDI enables delivery of uncompressed high-definition digital video over a wireless radio channel connecting any vid ...
*
Wi-Fi Direct
Wi-Fi Direct is a Wi-Fi standard for wireless connections that allows two devices to establish a direct Wi-Fi connection without an intermediary wireless access point, Router (computing), router, or Internet connection. Wi-Fi Direct is single-hop ...
ip based:
*
Chromecast
Chromecast is a discontinued line of digital media players developed by Google. The devices, designed as small dongles, can play Internet-streaming media, streamed audio-visual content on a high-definition television or home audio system. The u ...
(proprietary media broadcast over ip:
Google Cast for audio or audiovisual playback)
*
AirPlay
Airplay is how frequently a song is being played through broadcasting on radio stations. A song which is being played several times every day (spins) would have a significant amount of airplay. Music which became very popular on jukeboxes, in n ...
(proprietary ip based)
*
Digital Living Network Alliance (DLNA) (ip based)
port / cable standards for mobile equipment:
*
Mobile High-Definition Link - MHL
* SlimPort (
Mobility DisplayPort), also known as MyDP
References
External links
*
Civil mm-wave Regulation in USThe Main Wireless HDMI Transmission Protocols and Their Typical Products
{{DEFAULTSORT:Wirelesshd
Networking standards
Telecommunications-related introductions in 2008
Wireless display technologies