8.2. Registration of audio/rtx

MIME type: audio

MIME subtype: rtx

Required parameters:

• rate: the RTP timestamp clockrate is equal to the RTP timestamp clockrate of the media that is retransmitted.

• apt: associated payload type. The value of this parameter is the payload type of the associated original stream.

Optional parameters:

• rtx-time: indicates the time in milliseconds (measured from the time a packet was first sent) that the sender keeps an RTP packet in its buffers available for retransmission.

Encoding considerations: this type is only defined for transfer via RTP.

Security considerations: see Section 12 of RFC 4588

Interoperability considerations: none

Published specification: RFC 4588

Applications which use this media type: multimedia streaming applications

Additional information: none

Person & email address to contact for further information:

• [email protected]
• [email protected]
• [email protected]

Intended usage: COMMON

Authors: Jose Rey, David Leon

Change controller: IETF AVT WG delegated from the IESG