[Multimedia] Different standards used in encoding Audio/Video/data

Key standards referenced in H.323

      Recommendation #  Title (issue date)
       Audio Codecs
       G.711 Pulse code modulation of voice frequencies (11/88)
       G.722 7 kHz audio coding within 64 kb/s (11/88)
       G.723.1 Dual rate speech coders for multimedia communication
transmitting at 5.3 and 6.3 kb/s (03/96)
       G.728 Coding of speech at 16 kb/s using low-delay code excited linear
prediction (09/92)
       G.729 Coding of speech at 8 kb/s using conjugate-structure
algebraic-code-excite linear-prediction (03/96)
       Video Codecs
       H.261 Video codecs for audiovisual services at p x 64 kb/s (03/93)
       H.263 Video coding for low bit rate communication (02/98)
       Data Conferencing
       T.120 Data protocols for multimedia conferencing (07/96)
       Control
       H.245 Control protocol for multimedia communication (09/98)
       H.225.0 Call signaling protocols and media stream packetization for
packet-based multimedia communication systems (02/98)
      Real-time Transport
       RTP/RTCP RFC1889 (01/96), RFC1890 (01/96), RFC2032 (10/96), RFC2429
(10/98)
       Security
       H.235 Security and encryption for H-Series (H.323 and other
H.245-based) multimedia terminals (02/98)
       Supplementary Services
       H.450.1 Generic functional protocol for the support of supplementary
services in H.323 (02/98)
       H.450.2 and 450.3 Call transfer and call diversion supplementary
services for H.323 (02/98)