The IEEE 1394 interface was created by Apple and is marketed as FireWire on their computers.
In theory you run a FireWire cable from the 1394 connection on your TV to a FireWire socket on your Mac and use some recording software to capture the HDTV signal.
In the real world things are never that simple. The IEEE 1394 interface on the TV is usually there to connect cable TV boxes rather than streaming HD content. There are ways to make this work but there are also many variables (make of TV etc.) that will prevent it from working. (See links below for a fairly old discussion about the topic).
A modern Intel Mac is quite capable of recording HDTV through a USB device, connected directly to the Mac, such as those made by Elgato using their EyeTV software.
The Sony version of the IEEE 1394 interface is called iLink.
The apple mac name of IEEE 1394 interface is FireWire.
The IEEE 1394 interface is also know as "Firewire" on an Apple Mac.
The IEEE 1394 Interface or Port is also know by it's Apple Mac name as FireWire.
iLink
The IEEE 1394 interface is marketed under the brand names FireWire (by Apple), i.LINK (by Sony), and Lynx (by Texas Instruments).
The IEEE 1394 interface was largely developed by Apple and is marketed by them as FireWire.
1394
Yes, they are required to provide it. See the FCC regulation 47CFR76.640: (4) Cable operators shall: (i) Effective April 1, 2004, upon request of a customer, replace any leased high definition set-top box, which does not include a functional IEEE 1394 interface, with one that includes a functional IEEE 1394 interface or upgrade the customer's set-top box by download or other means to ensure that the IEEE 1394 interface is functional. (ii) Effective July 1, 2005, include both a DVI or HDMI interface and an IEEE 1394 interface on all high definition set-top boxes acquired by a cable operator for distribution to customers.
There are several brand names, but the real name is IEEE 1394 interface.
Apple's FireWire (IEEE 1394 interface) was first introduced in 1995.
The apple mac name of IEEE 1394 is FireWire