An ITU-T recommendation concerning “video coding for low bit rate communication.” The H.263 is dedicated to video conferencing via H.324 terminals using V.34 modems at 28.8 kbit/s, and to H.323 LANbased videoconferencing . The coding algorithm in H.263 is based on H.261, but has better performance than the H.261, and it may eventually displace H.261.