Jump to content

Wireless Home Digital Interface

From Wikipedia, the free encyclopedia
This is an old revision of this page, as edited by 82.80.117.203 (talk) at 14:37, 7 August 2011. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Wireless Home Digital Interface (WHDI) is a consumer electronic standard for a wireless HDTV connectivity throughout the home. It is being driven by AMIMON, Hitachi Ltd., LG Electronics, Motorola, Samsung Group, Sharp Corporation and Sony.

WHDI enables uncompressed delivery of high-definition video over a wireless radio channel, allowing consumers to connect any source in the home to any display device.

Versions

The WHDI 1.0 standard specification was finalized in December 2009.[1][2][3] Sharp Corporation will be one of the first companies to roll out wireless HDTVs.[4][5] AT CES 2010 LG Electronics announced a WHDI wireless HDTV product line.[6][7]

In June 2010, WHDI announced an update to WHDI 1.0 which allows support for stereoscopic 3D, and WHDI 2.0 specification to be completed in Q2 2011.[8]

Technology

WHDI 1.0 provides a high-quality, uncompressed wireless link which supports data rates of up to 3Gbit/s (allowing 1080p) in a 40 MHz channel, and data rates of up to 1.5Gbit/s (allowing 1080i and 720p) in a single 20 MHz channel of the 5 GHz unlicensed band, conforming to FCC regulations and worldwide 5 GHz spectrum regulations. Range is beyond 100 feet (30 m), through walls, and latency is less than one millisecond.[9]

Controversy

Some of the technical statements made by the WHDI group have raised questions about the merits of their "claimed" 3 Gbps data rates as such claims violate basic fundamental laws of physics. Claims of 3Gbit/s data rates over a 40MHz channel equates to 75 bits per Hz. (3Gbit/s divided by 40MHz). For those not schooled in communications theory this is a number almost ten times what physics dictates is possible (802.11n by example only goes to 8 bits using QAM-256 best case).

WHDI 3D update due in Q4 2010 will allow support for 3D formats defined in HDMI 1.4a specification

WHDI 2.0 will increase available bandwidth even further, allowing additional 3D formats such as "dual 1080p60", and support for 4K x 2K resolutions.

Supporters

Promoters WHDI Official Site[10]

Contributors

Adopters

See also

  • WHDI.org, the official website of WHDI SIG

References

  1. ^ "Group Finalizes WHDI Spec For Multi-Room HD Streaming". Twice.com. Retrieved 2011-03-30.
  2. ^ Gardiner, Bryan (2007-03-13). "Motorola Buys Into AMIMON Wireless HD Standard". Extremetech.com. Retrieved 2011-03-30.
  3. ^ "Amimon Official Site". Amimon.com. Retrieved 2011-03-30.
  4. ^ Yamamoto, Mike (2008-04-30). "Sharp ready to roll out wireless HDTVs". Crave.cnet.com. Retrieved 2011-03-30.
  5. ^ "WHDI Official Site". Whdi.org. Retrieved 2011-03-30.
  6. ^ "LG intros HDTVs with wireless HDMI option". DVICE. 2010-01-06. Retrieved 2011-03-30.
  7. ^ "LG to ship HDTVs with WHDI wireless technology baked in". Engadget. 2010-01-06. Retrieved 2011-03-30.
  8. ^ (Press release). whdi.org. 2010-06-07 http://www.whdi.org/News/pr_20100607.html. Retrieved 2011-03-30. {{cite press release}}: Missing or empty |title= (help)
  9. ^ "WHDI™- Technology". Whdi.org. Retrieved 2011-03-30.
  10. ^ "WHDI Adds Major Companies as Contributors and Adopters". Tmcnet.com. Retrieved 2011-03-30.


Stub icon

This electronics-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=Wireless_Home_Digital_Interface&oldid=443513631"