
RTP PARAMETERS

	RTP Payload Types - Closed
	RTP RTCP Control Packet Types
	RTP SDES Item Types
-------------------------------------------------------------------------

RTP Payload types (PT) for standard audio and video encodings - Closed

The RFC "RTP Profile for Audio and Video Conferences with Minimal
Control" [RFC1890] specifies an initial set "payload types".  This
list mantains and extends that list.


      PT         encoding      audio/video    clock rate    channels
                 name          (A/V)          (Hz)          (audio)
      _______________________________________________________________
      0          PCMU          A              8000          1     [RFC1890]
      1          1016          A              8000          1     [RFC1890]
      2          G726-32       A              8000          1     [RFC1890]
      3          GSM           A              8000          1     [RFC1890]
      4          G723          A              8000          1       [Kumar]
      5          DVI4          A              8000          1     [RFC1890]
      6          DVI4          A              16000         1     [RFC1890]
      7          LPC           A              8000          1     [RFC1890]
      8          PCMA          A              8000          1     [RFC1890]
      9          G722          A              8000          1     [RFC1890]
      10         L16           A              44100         2     [RFC1890]
      11         L16           A              44100         1     [RFC1890]
      12         QCELP         A              8000          1 
      13         reserved      A
      14         MPA           A              90000          [RFC1890,2250]
      15         G728          A              8000          1     [RFC1890]
      16         DVI4          A              11025         1       [DiPol]
      17         DVI4          A              22050         1       [DiPol]
      18         G729          A              8000          1
      19         reserved      A
      20         unassigned    A
      21         unassigned    A
      22         unassigned    A
      23         unassigned    A
      dyn        GSM-HR        A              8000          1
      dyn        GSM-EFR       A              8000          1
      dyn        L8            A              var.          var.
      dyn        RED           A                            
      dyn        VDVI          A              var.          1    
      24         unassigned    V
      25         CelB          V              90000               [RFC2029]
      26         JPEG          V              90000               [RFC2435]
      27         unassigned    V
      28         nv            V              90000               [RFC1890]
      29         unassigned    V
      30         unassigned    V
      31         H261          V              90000               [RFC2032]
      32         MPV           V              90000               [RFC2250]
      33         MP2T          AV             90000               [RFC2250]
      34         H263          V              90000                   [Zhu]
      35--71     unassigned    ?
      72--76     reserved for RTCP conflict avoidance             [RFC1889]
      77--95     unassigned    ?
      96--127    dynamic       ?                                  [RFC1890] 
      dyn        BT656         V              90000
      dyn        H263-1998     V              90000
      dyn        MP1S          V              90000
      dyn        MP2P          V              90000
      dyn        BMPEG         V              90000


REFERENCES

[RFC1889] Schulzrinne, H., S. Casner, R. Frederick, V. Jacobson, "RTP:
          A Transport Protocol for Real-Time Applications", RFC 1889,
          GMD Fokus, Precept Software, Xerox Palo Alto Research
          Center, Lawrence Berkeley National Laboratory, October 1996.

[RFC1890] Schulzrinne, H., "RTP Profile for Audio and Video
          Conferences with Minimal Control", RFC 1890, GMD Fokus,
          January 1996.

[RFC2029] Speer, M., and D. Hoffman, "RTP Payload Format of Sun's Cell
          B Video Encoding", RFC 2029, Sun Microsystems, October 1996.

[RFC2032] Turletti, T., and C. Huitema, " RTP Payload Format for H.261
          Video Streams", RFC 2032, MIT, Bellcore, October 1996.

[RFC2435] Berc, L., W. Fenner, R. Frederick, S. McCanne, and P.
          Stewart, "RTP Payload Format for JPEG-Compressed Video",
          RFC 2435, DEC, PARC, LBL, October 1998.

[RFC2250] Hoffman, D., Fernando, G., Goyal, V., and M. Civanlar, "RTP
	  Payload Format for MPEG1/MPEG2 Video", RFC 2250, Sun
          Microsystems, Precept Spftware, AT&T Labs - Research,
          January 1998.

PEOPLE

[DiPol] Joseph Di Pol, <Joe.Dipol@eng.sun.com>, May 1996.

[Hoffman] Don Hoffman, <hoffman@eng.sun.com>, January 1996.

[Kumar] Vineet Kumar, <Vineet_Kumar@ccm.jf.intel.com>, January 1997.

[McCanne] Steve McCanne, <mccanne@ee.lbl.gov>, January 1996.

[Schulzrinne] Henning Schulzrinne, <schulzrinne@fokus.gmd.de>, May 1996.

[Speer] Michael Speer, <michael.speer@eng.sun.com>, January 1996.

[Turletti] Thierry Turletti, < >, January 1996.

[Zhu] Chunrong Zhu, <Chunrong_Zhu@ccm.jf.intel.com>, June 1996.  


-----------------------------------------------------------------------

RTP RTCP Control Packet types (PT)

The RFC "RTP: A Transport Protocol for Real-Time Applications"
[RFC1889] specifies an initial set of "control packet types" for RTCP.
This list mantains and extends that list.

   abbrev.    name                   value
   _______________________________________
   SR         sender report            200      [RFC1890]
   RR         receiver report          201      [RFC1890]
   SDES       source description       202      [RFC1890]
   BYE        goodbye                  203      [RFC1890]
   APP        application-defined      204      [RFC1890]

   These type values were chosen in the range 200-204 for improved
   header validity checking of RTCP packets compared to RTP packets or
   other unrelated packets.  New values may be assigned following
   these and then elswhere in the range [1,254].  The values 0 and 255
   are avoided for improved validity checking relative to random
   packets since all-zeros and all-ones are common values.

   Other constants are assigned by IANA. Experimenters are encouraged
   to register the numbers they need for experiments, and then
   unregister those which prove to be unneeded.

-----------------------------------------------------------------------

RTP SDES item types

The RFC "RTP: A Transport Protocol for Real-Time Applications"
[RFC1889] specifies an initial set of "item types" for the RTCP SDES
control packet.  This list mantains and extends that list.  

   abbrev.    name                              value
   __________________________________________________
   END        end of SDES list                      0      [RFC1890]
   CNAME      canonical name                        1      [RFC1890]
   NAME       user name                             2      [RFC1890]
   EMAIL      user's electronic mail address        3      [RFC1890]
   PHONE      user's phone number                   4      [RFC1890]
   LOC        geographic user location              5      [RFC1890]
   TOOL       name of application or tool           6      [RFC1890]
   NOTE       notice about the source               7      [RFC1890]
   PRIV       private extensions                    8      [RFC1890]

   H323-CADDR H.323 callable address                9      [Kumar]

   Other constants are assigned by IANA, in the range [0,255].
   Experimenters are encouraged to register the numbers they need for
   experiments, and then unregister those which prove to be unneeded.
 
REFERENCES
----------

[RFC1889] Schulzrinne, H., S. Casner, R. Frederick, V. Jacobson, "RTP:
          A Transport Protocol for Real-Time Applications", RFC 1889,
          GMD Fokus, Precept Software, Xerox Palo Alto Research
          Center, Lawrence Berkeley National Laboratory, October 1996.

[RFC1890] Schulzrinne, H., "RTP Profile for Audio and Video
          Conferences with Minimal Control", RFC 1890, GMD Fokus,
          January 1996.    

PEOPLE
------
[Kumar] Vineet Kumar, <Vineet_Kumar@ccm.jf.intel.com>, January 1997.


(last updated May 04 2001)

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