Short for predictive frame
, or predicted frame
, a video compression
method used by the MPEG
standard. In a motion sequence, individual frames of pictures are grouped together (called a group of pictures
, or GOP
) and played back so that the viewer registers the video s spatial motion. P-frames follow I-frames
and contain only the data that have changed from the preceding I-frame (such as color or content changes). Because of this, P-frames depend on the I-frames to fill in most of the data.
P-frames and B-frames are also referred to as delta frames.
Also see I-frame and B-frame.