Definitions for "I Frame"
Keywords:  mpeg, idct, encoded, cosine, intra
In MPEG video, an intra picture that is encoded independent from other pictures. I pictures provide a reference point for dependent P pictures and B pictures and allow random access into the compressed video stream.
a complete video frame that can be used as a before or after reference around which the intermediate frames can be rendered
An MPEG-2 compressed video frame containing most of the original information. Used as a reference to build subsequent B and P frames. Inverse discrete cosine transform (IDCT) A step in the MPEG decoding process to convert data from temporal back to spatial domain.