There are some distinct differences between IEEE 1394 (a and b) and USB (1.0 and 2.0) that allow one to work for some applications and the other, not. For instance, IEEE 1394 allows video devices to directly stream DV and HDV encoded video straight to other devices or into computers. USB does not have the architecture to do this. I am not sure why, but it is definitely something in the architecture of the bus standard. USB has the advantage of plug-and-play. USB 3.0 might change that and it would be interesting to hear how it works other than just speeding data up. But I doubt it will replace HDCP/HDMI because it was hard enough to get manufacturers and content owners to agree to get that system approved, let alone to get approval on an open bus architecture. But perhaps I am just showing my ignorance on the matter. I wouldn't mind hearing from those that know intimately about how each of those standards work. In fact, any direction to technical papers would be greatly appreciated. Dan "Manfredi, Albert E" <albert.e.manfred To i@xxxxxxxxxx> <opendtv@xxxxxxxxxxxxx> Sent by: cc opendtv-bounce@fr eelists.org Subject [opendtv] USB 3.0 07/01/2008 12:20 PM Please respond to opendtv@freelists .org Back in the days when IEEE 1394 and USB were being introduced, I wondered why USB was even necessary. However, we all know that technologies fail or succeed for many reasons, among them being a good, continuous development effort. And just sheer numbers in the marketplace. Case in point, USB, about now to come out with the 3.0 standard. http://arstechnica.com/news.ars/post/20070918-intel-announces-demonstrat es-usb-3-0.html thinks that it might push FireWire off the table. But more importantly, why wouldn't USB push the ever troublesome HDMI out of the market, and the still-not-here DisplayPort, just as USB already is doing to MIDI, RS-232, joystick, and other lesser standards? USB 3.0 supports 4.8 Gb/s. Along with USB's existing structure of defined device classes, version 3.0 should easily support the combination of audio and uncompressed HD video. In the TV case, with something like HDCP layered on top. And it's hot swappable by design, so none of those HDMI foibles, hopefully. And devices can be daisy chained. Either USB 3.0, and a UWB or 60 MHz wireless interface carrying USB 3.0, could very well displace HDMI and DisplayPort, it seems to me. Who would have thunk it. Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.