Firewire (aka IEEE1394, or Sony's i.LINK) and USB are used to transfer data between the camcorder and computer, while the other types include AV (Audio Video) and S-Video, which are used to connect playback/recording devices such as the TV or VCR. Most MiniDV camcorders feature a single FireWire connection for up to 400Mbps transfer speeds to allow you to copy video data effortlessly to the comput