Intelligent Transcoding Gateway Model for

Transcoding with the Session Initiation Protocol draft-taegyukang-sipping-transc-itg-00.txt 61 IETF - Washington DC, USA

Tae-Gyu Kang tgkang@etri.re.kr

Intelligent Transcoding Gateway

SIP: RFC3261

SDP: RFC2327

SDP OFFER/ANSWER: RFC3264

Standard P

rocess

Framework

Requirement: RFC3351

ToIP

RTP Codecs

3pcc:RFC3725 B2BUA ITG

ITG: Intelligent Transcoding Gateway3pcc: The Third Party Call Control Transcoding ModelB2BUA: Conference Bridge Transcoding ModelToIP: Text over IP

draft-ietf-sipping-transc-framework-00.txt

ITG Model

ITG: Intelligent Transcoding Gateway Model

Aa

Bc

Ta-b, a-c

SIP SIP

Media Media

Characteristics

• No additional Signaling Session• Additional codec information

Insertion at T• A new opportunity of Internet

Telephony Service Provider

A new opportunity

Wireline Wireless

PSTN Internet

T1

3GPP

T2

3GPP2

T3

T4

Text

Video/Voice

Voice

T5

Wireless IP Phone

T6

Next Steps

• Does ITG have any critical error?• Next Step

– Refinement of ITG– More detailed procedures– Scenarios– Reference: draft-ietf-sipping-transc-

framework-00.txt