Converting Firewire to USB 3 - is it theoretically possible?

Question

I am in the process of buying a new laptop for video capture / editing, and it's proving difficult to find one at a decent price / spec that includes Expresscard for Firewire connectivity (which I really need). It does seem like Expresscard is on the way out based on what I've seen recently.

Since the assumption seems to be that USB 3.0 is the heir apparent to Expresscard I was wondering what people's thoughts were on whether it should be possible to convert a Firewire input to USB 3.0. There don't seem to be any devices around at the moment that do this but is this because USB 3.0 is still in its infancy or because it's not practical / possible?

Answer 1

Short answer: No.

Slightly longer answer: Yes, but you'll essentially need another computer in a box to do it.

USB (1.1, 2.0, and 3.0) are based on completely different specs than Firewire (400 and 800). Even the way they interact with the processor and memory is completely different. They are not wire-compatible, or even signal-compatible. In order to convert a a Firewire connection into a USB connection, you would need a computer with both ports, have it convert the Firewire signal into binary, then convert the binary into a USB signal and send it out. This hasn't even touched on the problem of having the device show up properly to the end computer. It's a complex problem that hasn't be tackled because there is so little demand for it, especially considering the price that would be asked for such a device.

If you use Expresscard solely for Firewire, I say ditch Expresscard and find something with built in Firewire. It's growing more uncommon for it to be included on consumer laptops, but it's still widely available on business models, which also tend to be significantly higher in quality.