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.
This is the port IEEE 1394 is also known as Fire Wire
From Wikipedia definition of IEEE 1394 Standard - "The IEEE 1394 interface is a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications. The interface is also known by the brand names of FireWire(Apple), i.LINK (Sony), and Lynx (Texas Instruments). IEEE 1394 replaced parallel SCSI in many applications, because of lower implementation costs and a simplified, more adaptable cabling system. The 1394 standard also defines a backplane interface, though this is not as widely used."
IEEE 1394 (also known as firewire), Hi-Speed USB 2.0, and SCSI
From Wikipedia definition of IEEE 1394 Standard - "The IEEE 1394 interface is a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications. The interface is also known by the brand names of FireWire(Apple), i.LINK (Sony), and Lynx (Texas Instruments). IEEE 1394 replaced parallel SCSI in many applications, because of lower implementation costs and a simplified, more adaptable cabling system. The 1394 standard also defines a backplane interface, though this is not as widely used."
IEEE1394 or as Apple calls it, "Firewire" can carry more data. And superior to both of these is Thunderbolt also developed by Apple.
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 IEEE 1394 is similar to a USB device, it can be plugged into the port on the computer or device, mostly to import audio or video files. The IEEE 1394 port is called a firewire. An external scanner or disk drive may also have a firewire port.
IEEE 1394, also known as FireWire or i.LINK was first introduced in 1995. Since then several additional protocol versions with different speed definitions have been introduced.
Firewire, also known as IEEE 1394 and i.Link
It's kind of the other way around. IEEE 1394 is the standard. It is also known as Firewire.
From Wikipedia definition of IEEE 1394 Standard - "The IEEE 1394 interface is a serial bus interface standard for high-speed communications and isochronous real-time data transfer, frequently used by personal computers, as well as in digital audio, digital video, automotive, and aeronautics applications. The interface is also known by the brand names of FireWire(Apple), i.LINK (Sony), and Lynx (Texas Instruments). IEEE 1394 replaced parallel SCSI in many applications, because of lower implementation costs and a simplified, more adaptable cabling system. The 1394 standard also defines a backplane interface, though this is not as widely used."