Summary

Optional Additional Supplemental Enhancement Information which can be added to an H.263 bitstream to provide backward-compatible enhancements, including:

������������ Indication of use of a specific fixed-point IDCT.

������������ Picture Messages, including the message types of:

-��� Arbitrary Binary Data;

-��� Text (Arbitrary, Copyright, Caption, Video Description, or Uniform Resource Identifier);

-��� Picture Header Repetition (Current, Previous, Next with Reliable Temporal Reference, or Next with Unreliable Temporal Reference);

-��� Interlaced Field Indications (Top or Bottom); and

-��� Spare Reference Picture Identification.