8. IANA Considerations

The new value "ccm" has been registered with IANA in the "rtcp-fb" Attribute Values registry located at the time of publication at: http://www.iana.org/assignments/sdp-parameters

• Value name: ccm
• Long Name: Codec Control Commands and Indications
• Reference: RFC 5104

A new registry "Codec Control Messages" has been created to hold "ccm" parameters located at time of publication at: http://www.iana.org/assignments/sdp-parameters

New registration in this registry follows the "Specification required" policy as defined by [RFC2434]. In addition, they are required to indicate any additional RTCP feedback types, such as "nack" and "ack".

The initial content of the registry is the following values:

• Value name: fir

  • Long name: Full Intra Request Command
  • Usable with: ccm
  • Reference: RFC 5104

• Value name: tmmbr

  • Long name: Temporary Maximum Media Stream Bit Rate
  • Usable with: ccm
  • Reference: RFC 5104

• Value name: tstr

  • Long name: Temporal Spatial Trade Off
  • Usable with: ccm
  • Reference: RFC 5104

• Value name: vbcm

  • Long name: H.271 video back channel messages
  • Usable with: ccm
  • Reference: RFC 5104

The following values have been registered as FMT values in the "FMT Values for RTPFB Payload Types" registry located at the time of publication at: http://www.iana.org/assignments/rtp-parameters

RTPFB range

Name	Long Name	Value	Reference
	Reserved	2	[RFC5104]
TMMBR	Temporary Maximum Media Stream Bit Rate Request	3	[RFC5104]
TMMBN	Temporary Maximum Media Stream Bit Rate Notification	4	[RFC5104]

The following values have been registered as FMT values in the "FMT Values for PSFB Payload Types" registry located at the time of publication at: http://www.iana.org/assignments/rtp-parameters

PSFB range

Name	Long Name	Value	Reference
FIR	Full Intra Request Command	4	[RFC5104]
TSTR	Temporal-Spatial Trade-off Request	5	[RFC5104]
TSTN	Temporal-Spatial Trade-off Notification	6	[RFC5104]
VBCM	Video Back Channel Message	7	[RFC5104]