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Discussion Starter · #1 ·
Wouldn't a wireless video connection be a lot better than Firewire to connect AV components?


"802.15.3 has created a Study Group to investigate the creation of an alternate PHY to address very high data rate applications


Goal of > 110Mbps @ 10 m, > 400 Mbps @ 5 m


1394a, USB2.0 HS cable replacement


DV50, DV100, HD DVD, High resolution printer and scanner, fast download speed for MP3 players, digital still cameras"

http://www.fcc.gov/oet/tac/april26-0...viewNOPICT.ppt


With Firewire you still have to interconnect devices and sometimes run a cable across a room or between rooms. With this standard you just plug in the AV equipment and it automatically connects to the network. A lot more consumer friendly than our present mess.


One implementation of this standard will use Ultra Wide Band (UWB) signals that are several GHz wide and transmit 200 ps wide pulses.


UWB does is far less sensitive to drop outs and other problems that normal RF signals have. It means you could walk around the house with your future HDTV, project straight into the eye devices.
 

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Discussion Starter · #3 ·
Quote:
Originally posted by dr1394
Philips is developing wireless firewire (or 1394 over

802.11a if you prefer).

Ron
I expect that they are using traditional narrow band RF techniques for wireless 1394. If that is true, the reliability of the link will be much lower than UWB and the complexity of the chip(s) will be much higher.


I just hope the market is not driven to an inferior, more expensive technology for AV.
 

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The vulnerability re: theft of service boggles the mind.
 

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Quote:
Originally posted by greywolf
The vulnerability re: theft of service boggles the mind.
I was thinking the same thing. The devices could be built with some security encryption but that would be hard (expensive) to scale within a user's network.
 

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As a developing IEEE standard, it will be at least 5 years before this stuff is cost effective. But it will come... Until then there are all kinds of proprietary wireless video standards being contemplated. Magis's proprietary version of 802.11a is optimized for video grade Quality Of Service requirements and is available now. It gets a "real" and dropout free 40 MB/S up to 50m and tapers down from there. But it's not even close to the cost of a USB2 connection.


All of these systems are either some variation of spread spectrum (like CDMA for example) or a multicarrier modulation like OFDM. Some are researching MIMO (multiple antenna) systems. Either way these guys have really started to learn how to constructively handle the awful multipath environment of a home or office.


Again, my point is time and cost. We will see variations on this in the coming years. But it will be several years before it's ubiquitous.
 

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Discussion Starter · #7 ·
Quote:
Originally posted by greywolf
The vulnerability re: theft of service boggles the mind.
At least for the 802.15.3 UWB standard, the chips automatically connect into any AV network that it can see. This means that AV network could automatically connect over large neighborhoods or in the extreme maybe even over a metropolitan area.


The network could form automatically with people doing nothing except plugging in their equipment and turning it on. They could have access to other peoples video / sound sources.


Transfers of HDTV over those large areas would be faster than real time at 110 Mbps and up. I don't know what the standard does for this very real possibility.


The first chip came out in July at $20 each so it wont be too long before products come on the market.

http://www.xtremespectrum.com/press/...uly162002.html


We can be sure Hollywood is worried about this one and has put their fingers in somewhere.
 

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The future is a big place, but for now hard wired Firewire will be it.
 
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