The Free On-line Dictionary of Computing (19 January 2023):

MPEG-4

    A video
   compression standard planned for late 1998.  MPEG-4 extends
   the earlier MPEG-1 and MPEG-2 algorithms with synthesis of
   speech and video, fractal compression, computer
   visualisation and artificial intelligence-based image
   processing techniques.

   [Technical details?]

   (1999-01-06)