WirelessHD

WirelessHD is an industry-led effort to define a specification for the next generation wireless digital network interface specification for wireless high-definition signal transmission for consumer electronics products. The consortium behind the standard includes among others Intel, LG, Matsushita, NEC, Samsung, SiBEAM, Sony and Toshiba, and have finalized the specification in January 2008. [citeweb|title=About WirelessHD|url=http://www.wirelesshd.org/company/about.html|publisher=wirelesshd.org|accessdate=2008-03-18]

The WirelessHD (WiHD) standard will allow for uncompressed, digital transmission of HD video and audio and data signals, essentially making it equivalent, in theory, to wireless HDMI. The specification has been designed and optimized for wireless display connectivity, achieving in its first generation implementation high-speed rates from 4 Gbit/s for the CE, PC, and portable device segments. Its core technology promotes theoretical data rates as high as 25 Gbit/s (compared to 10.2-Gbit/s for HDMI 1.3), permitting it to scale to higher resolutions, color depth, and range.

The signal will operate on the 60 GHz Extremely High Frequency band and apparently will support the bandwidth required to support both current and future HD signals. The 60 GHz band requires line of sight between transmitter and receiver, and the WiHD standard overcomes this limitation through the use of beam forming at the receiver and transmitter antennas. 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 will limit undesired propagation over long distances and help control intersystem interference and long distance reception of concern to video copyright owners. [cite web| title = CES to Showcase Wireless HDTVs|url=http://www.nytimes.com/aponline/technology/AP-Wireless-High-Def.html?ref=technology|publisher=nytimes.com| accessdate = 2008-01-03 ]

A ubiquitous wireless HD standard would do much to improve interoperability among devices, and would also expand the capabilities of personal video players, PDAs, and other handheld devices.

The first practical application of wireless HD technology for broadcast television was achieved for Monday Night Football in 2005 by a company called [http://www.aerialvideo.com/ Aerial Video Systems] . [cite web| title = Wireless HD at Super Bowl|url=http://www.aerialvideo.com/index.php?option=com_content&view=article&id=27&Itemid=44&3fb29dbc88849da104cf27d50172ddf6=3c6b5035790d8c016cd9442dbcf20455| accessdate = 2008-07-14]

Promoters

* Intel Corporation
* LG Electronics Inc.
* Matsushita Electric Industrial Co., Ltd. (Panasonic)
* NEC Corporation
* SAMSUNG ELECTRONICS, CO., LTD
* SiBEAM, Inc.
* Sony Corporation
* Toshiba Corporation

Competition

WirelessHD is competing somewhat with the upcoming Wireless USB standard, which operates on the 3.1 to 10.6 GHz band and delivers 480 Mbit/s throughput.

WirelessHD also competes with the Wireless High-definition Interface standard, developed by AMIMON and supported by Motorola and Sharp. WDHI uses 40 MHz of bandwidth in the 5 GHz unlicensed band, offering uncompressed full HD video.

See also

* Wireless High-definition Interface
* Wireless HDMI
* Bluetooth
* Extremely high frequency
* IEEE 802.15
* UWB
* UWB Forum
* Wibro
* Wibree
* WiMedia Alliance
* Wireless USB
* ZigBee

References

External links

* [http://www.sibeam.com/ SiBEAM]
* [http://www.marcus-spectrum.com/MMW.htm Civil mm-wave Regulation in US]