For I-Frame (Intra-Frame) we have a term and definition in Television.

I-frame (Intra-frame) (Television)

In a video compression scheme, such as for picture information on a DVD, a frame that is complete. In order to begin playback, an I-frame must be located. Other frames (B-frames, P-frames, q.v.) are just the differences from adjacent frames. Thus frame 1 may be an I-frame. Frame 2 on the DVD might be a P-frame which when combined with frame 1, yields the complete frame 2 for display. Frame 3 on the DVD might be a B-frame which when combined with the complete frame 2 we just derived (or from complete frame 4 in backwards single stepping), yields the complete Frame 3, and so on. Usually there is an I-frame about every ten frames, so the player doesn't have to hunt too far when resuming playback in the middle of the program.

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