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ITU-T Recommendation G.722.1:

ITU-T Recommendation G.722.1:. The RTP Packetization Steve Casner (CISCO) for A. Crossman (PictureTel) tonyc@pictel.com. Overview. ITU-T standard approved in Sept. 1999 Wideband 50Hz - 7kHz Two rates: 24kbit/s or 32kbit/s Low complexity, < 15MIPS 20ms frames (60 or 80 octets/frame)

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ITU-T Recommendation G.722.1:

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  1. ITU-T Recommendation G.722.1: The RTP Packetization Steve Casner (CISCO) for A. Crossman (PictureTel) tonyc@pictel.com

  2. Overview • ITU-T standard approved in Sept. 1999 • Wideband 50Hz - 7kHz • Two rates: 24kbit/s or 32kbit/s • Low complexity, < 15MIPS • 20ms frames (60 or 80 octets/frame) • Quality equivalent to ITU-T G.722

  3. first bit transmitted last bit transmitted sequence (for one frame) of bits (480 or 640) output by encoder msb… lsb msb… lsb msb… lsb msb… lsb msb… lsb RTP octet 1 RTP octet 2 RTP octet 3 RTP octet 60 or 80 Mapping G.722.1 into RTP Octets

  4. RTP Payload Format 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | RTP Header [see RFC 1889] | +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ | | + one or more frames of G.722.1 | | .... | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  5. Issues • ITU-T approved same H.323/RTP packet format in Feb. 2000 • Typos in this draft resulted after submission to IETF - includes badly formatted references • Notify author of inconsistencies/typos etc.

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