Originally Posted by bjmarchini
Theoretically it is possible. The bandwidth on 802.11g is 54Mbits, BUT I never seem to get more than 5-7Mbits from any of the connections that I have when testing on the internet. I think the 54Mbits is a peak or spike but not the average maximum for non stop use. My wired PCs always get 18-20 while the Wifi get 5-6. This would be fine for SD, but HD is not really going to run on that. From what I remember the actual bandwidth used by most movies is around 20Mbits (It can go much higher, but this the average).
Now wireless N? I don't know. I really depends on what your ACTUAL bandwidth is.
It sounds like you are mixing up bits and bytes.
Mbps= MegaBITS per second
MB/s= MegaBYTES per second
802.11g = 54Mbps = 6.75 MB/s
So, it sounds like your measurements of your Wi-Fi getting "5-6" are actually 5 to 6 megaBYTES per second. This is certainly enough bandwidth for HD. Your measurements of "18-20" for your wired connection sounds like 18-20 megaBYTES per second (I take it you have a gigabit connection for that measurement). HD content can range anywhere from 15Mbps up to 30Mbps (around 2 to 4 megabytes per second).
The real problem with wireless is the ability to keep the data rate constant. Interference from other devices, bad chipsets, and other Wi-Fi clients can screw with your stream.
For reference, my equipment used in the successful Wi-Fi streaming of HD:
- Linksys WRT54GL with DD-WRT firmware
(I use DD-WRT firmware for its tweakability - including wireless settings.)
- Linksys WUSB54G
If you try this test again with wireless, try some tests with all of your other Wi-Fi clients turned off. Or, measure your bandwidth (try a file copy with robocopy or something like that. Robo copy should give you an average transfer rate after it completes).