RFC 3009 (rfc3009) - Page 2 of 10

Registration of parityfec MIME types

RFC 3009                        FEC MIME                   November 2000


2 Registration of audio/parityfec

       To: 

       Subject: Registration of MIME media type audio/parityfec

       MIME media type name: audio

       MIME subtype name: parityfec

       Required parameters: none

            Note that [3] mandates that RTP payload formats without a
            defined rate must define a rate parameter as part of their
            MIME registration.  The payload format for generic forward
            error correction [1] does not specify a rate parameter.
            However, the rate for FEC data is equal to the rate of the
            media data it protects.

       Optional parameters: none

            Typical optional parameters [3], such as the number of
            channels, and the duration of audio per packet, do not
            apply to FEC data.  The number of channels is effectively
            the same as the media data it protects; the same is true
            for the duration of audio per packet.

       Encoding considerations: This format is only defined for
            transport within the Real Time Transport protocol (RTP)
            [4,5].  Its transport within RTP is fully specified with RFC
            2733 [1].

       Security considerations: the same security considerations
            apply to these mime registrations as to the payloads for
            for them, as detailed in RFC 2733.

       Interoperability considerations: none

       Published specification: This MIME type is described fully
            within RFC 2733 [1].

       Applications which use this media type: Audio and video
            streaming tools which seek to improve resiliency to loss by
            sending additional data with the media stream.

       Additional information: none





Rosenberg & Schulzrinne     Standards Track