Slide title 70 pt CAPITALS Slide subtitle minimum 30 pt RTP Header Extension For SDES ITEMs draft-westerlund-avtext-sdes-hdr-ext-01 Bo Burman (Ericsson), Roni Even (Huawei), Magnus Westerlund (Ericsson), Mo Zanaty (Cisco)

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 2 Proposal Motivations Technical Details Adoption Overview

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 3 An RTP header extension for Source Description (SDES) items Has been brought up in various discussions –Lets do it! Initial Proposal in draft-westerlund-avtext-sdes-hdr-ext-01 Adopt it as WG item and work together on a solution? Proposal

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 4 A few different proposals suggest new SDES items that would benefit from a header extension: –APPID (draft-even-mmusic-application-token-01)draft-even-mmusic-application-token-01 –SRCNAME (draft-westerlund-avtext-rtcp-sdes-srcname-03)draft-westerlund-avtext-rtcp-sdes-srcname-03 RFC 6051 – RTP header extension for Rapid Synchronisation of RTP Flows provide equivalent to RTCP Sender Report, but not CNAME To enable this to be used in context when also the CNAME information cant provided earlier than the timing information. Unclear of the evolution of MSID in SDP (draft-ietf-mmusic-msid-01), may also require in-band signaling?draft-ietf-mmusic-msid-01 Motivation

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 5 RTP/RTCP Mechanism needed when signaling cant provide the information: –Dynamic group memberships –Multicast/Broadcast –Signaling node may not have access to actually used SSRCs at time of signaling Fate sharing in delivery between media and relation information AVPF ACKs can inform sender when Header Ext is received RTP Header Extensions are useful when RTCP delivery is not timely enough: –New SSRC in a session –New Endpoint joins multiparty session RTCP may not be timely enough when: –RTP Packet streams are to be decoded directly on reception –They have relations that SDES items expresses, e.g. CNAME gives synchronization context Motivation

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page | ID | len | SDES Item text value... | Put the SDES item string in RTP header extension: –String can be up to 255 bytes, use 1 or 2-byte headers as appropriate for SDES items intended to use in RTP session –Header Extension ID maps to SDES Item type via URN –Len: Number of bytes in SDES Item String Future Extensibility –New SDES Items registers a URN and can then use the header extension Technical Details

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 7 URN Proposal –RTP Header Extensions are registered in URN space: –urn:ietf:params:rtp-hdrext: –Proposes to allocate urn:ietf:params:rtp-hdrext:sdes to SDES items. Resulting URNs: URN SDES Item Reference ================================================================== urn:ietf:params:rtp-hdrext:sdes:cname CNAME [RFC3550] urn:ietf:params:rtp-hdrext:sdes:name NAME [RFC3550] urn:ietf:params:rtp-hdrext:sdes: [RFC3550] urn:ietf:params:rtp-hdrext:sdes:phone PHONE [RFC3550] urn:ietf:params:rtp-hdrext:sdes:loc LOC [RFC3550] urn:ietf:params:rtp-hdrext:sdes:tool TOOL [RFC3550] urn:ietf:params:rtp-hdrext:sdes:note NOTE [RFC3550] urn:ietf:params:rtp-hdrext:sdes:priv PRIV [RFC3550] urn:ietf:params:rtp-hdrext:sdes:h323-caddr H323-CADDR [Vineet_Kumar] urn:ietf:params:rtp-hdrext:sdes:apsi APSI [RFC6776] Technical Details

Slide title 44 pt Text and bullet level 1 minimum 24 pt Bullets level 2-5 minimum 20 pt Characters for Embedded font: !"#$%&'()*+,-./ :; WXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~¡ ¢£¤¥¦§¨©ª«¬®¯°±²³´¶·¸¹º»¼½ÀÁÂÃÄÅÆÇÈËÌÍÎÏÐÑÒ ÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö ÷øùúûüýþÿĀāĂăąĆćĊċČĎďĐđĒĖėĘęĚěĞğĠġĢģ ĪīĮįİıĶķĹĺĻļĽľŁłŃńŅņŇňŌŐőŒœŔŕŖŗŘřŚśŞşŠšŢ ţŤťŪūŮůŰűŲųŴŵŶŷŸŹźŻżŽžƒȘșˆˇ˘˙˚˛˜˝ – …ĀĀĂĂĄĄĆĆĊĊČČĎĎĐĐĒĒĖĖĘĘĚĚĞĞ ĠĠĢĢĪĪĮĮİĶĶĹĹĻĻĽĽŃŃŅŅŇŇŌŌŐŐŔŔŖŖŘŘŚŚŞŞŢŢŤ ŤŪŪŮŮŰŰŲŲŴŴŶŶŹŹŻŻȘș ΆΈΉΊΌΎΏΐΑΒΓΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΪΫΆΈΉΊΰ αβγδεζηθικλνξορςΣΤΥΦΧΨΩΪΫΌΎΏ ЁЂЃЄЅІЇЈЉЊЋЌЎЏАБВГДЕЖЗИЙКЛМНОПРСТУФХ ЦЧШЩЪЫЬЭЮЯАБВГДЕЖЗИЙКЛМНОПРСТУФХЦ ЧШЩЪЫЬЭЮЯЁЂЃЄЅІЇЈЉЊЋЌЎЏѢѢѲѲѴѴҐҐә ǽ Do not add objects or text in the footer area draft-westerlund-avtext-sdes-hdr-ext-01 | Magnus Westerlund | IETF 88 - AVTEXT WG | | Page 8 So is this a good idea? WG Adoption? Wg Adoption?