IPTV 里田浩三谷口邦弘朝倉敬喜 IPTV IP IP 1997 RealMedia Windows Media Flash 1999 IMS IP Multimedia Subsystem IP 006 NGN Next Generation Network IMS IP IPTV IMS NGN IPTV IPTV TV VoD Video On Demand IPTV ITU-T IPTV IPTV 1 3 4 International Telecommunication Union Telecommunication Standardization Sector European Telecommunications Standards Institute Alliance for Telecommunications Industry Solutions Telecoms & Internet converged Services & Protocols for Advanced Networks IPTV IPTV IPTV 005 IPTV IPTV 標準化団体の概要 IPTV ITU-T 1 ETSI ATIS 3 ITU-T IPTV FG-IPTV Focus Group 1 008 1 IPTV-GSI Global Standard Initiative SG Study Group NGN ETSI TISPAN 4 IPTV ETSI TISPAN ITU-T NGN IMS IPTV NGN R 3 ATIS IIF IPTV Interoperability Forum TV DRM Digital Rights Management QoS Quality of Service 4 008 IPTV IPTV MSF MultiService Forum 情報処理 Vol.49 No.11 Nov. 008 1311
Broadcast services Distributed content services On-demand services Advertising services Time-shifting and place-shifting services Supplementary content Information services, Commerce services Entertainment services, Learning services Interactive services Medicine services, Monitoring services Portal services, Interactive advertising Communication services Communication service Public interest services, Hosting services Others Presence service, Session mobility service 表 -1 IPTV-GSI で分類されている IPTV サービスシナリオ Linear TV/Linear TV with Trick Modes Pay Per View Elecrtonic program guide (EPG) Personal Broadcast Service Hybrid : Online and off-air TV delivery Linear TV with multi-view service Video on demand (VoD)/ Near VoD Reserved delivery service On-demand with multi-view service Music on Demand Traditional advertising service Targeted advertising On-demand advertising Advertising message logging GMI Global MSF Interoperability 008 IPTV 1 IPTV NGN IPTV ETSI IPTV ATIS IPTV ITU-T IPTV サービスシナリオ ITU-T IPTV-GSI Distributed content services Interactive services Communication services 4-1 配信型コンテンツサービス IPTV Broadcast services On-demand services Advertising services Time-shifting and place-shifting services TV Linear TV TV TV Linear TV with trick modeepg, Electronic Program Guide VoD Near VoD Traditional advertising service Targeted advertising On-demand advertising TV npvr Network Personal Video Recorder N-PVR インタラクティブサービス Information services 131 情報処理 Vol.49 No.11 Nov. 008
IPTV 図 -1 IPTV アーキテクチャ (ITU-T FG-IPTV より抜粋 ) 5 Entertainment services Portal services Commerce services コミュニケーションサービス IPTV アーキテクチャ IPTV-GSI ETSI TISPAN ATIS IIF IPTV-GSI ETSI TISPAN ATIS IIF IPTV-GSI IPTV 5-1 SCP Service and Content Protection - 1 End-User Functions STB : Set Top Box Network Functions Content Delivery Functions Application Functions IPTV IPTV Service Control Functions Management Functions Content Provider Functions ETSI TISPAN ATIS IIF -, 3 情報処理 Vol.49 No.11 Nov. 008 1313
図 - TISPAN IMS based IPTV アーキテクチャ (ETSI/TISPAN TS1807 より抜粋 ) 6 図 -3 IPTV Functional Decomposition(ATIS IIF, ATIS-0800007 より抜粋 ) 7 6 7 - SDF Service Discovery FunctionSSF Service Selection FunctionUPSF User Profile Server FunctionSCF Service Control FunctionCoD Content on DemandBC BroadCastNASS Network Attachment SubSystemRACS Resource and Admission Control Subsystem -3 IPG Interactive Program GuideSUP Service User ProfileOSS/BSS Operational Support System Business Support System 1314 情報処理 Vol.49 No.11 Nov. 008
IPTV IPTV-GSI ETSI TISPAN ATIS IIF End-user Functions UE(User Element) Consumer Domain Transport Functions Transport Functions Network Provider Domain Content Delivery Functions IPTV Media Functions Media Delivery Functions Application and IPTV Service Functions Application and IPTV Service Functions, UPSF Common Component Service Control Functions Core IMS, UPSF IMS based IPTV Control Management Functions Management Functions OSS/ BSS Content Provider Functions Content Provider Functions Content Provider Domain 表 - アーキテクチャ間の対応表 図 -4 FG-IPTV で検討している技術 -ETSI TISPAN IMS IPTV IMS UE User element IPTV Media Functions IPTV Service Control Functions IPTV IMS ITU-T IPTV-GSI NGN IPTV ETSI TISPAN UPSF IPTV 8 FG-IPTV IPTV IPTV 8 IPTV-GSI FG-IPTV -4 5 IPTV 映像配信技術 IPTV 1 QoE Quality of Experience FG-IPTV 品質確保型映像配信技術 FG-IPTV IMS NGN NGN IMS -5 NGN IMS CSCF Call Session Control Function RACF Resource and Admission Control Function NACF Network Attachment Control Function CSCF 情報処理 Vol.49 No.11 Nov. 008 1315
図 -5 技術 品質確保型映像配信 SIP Session Initiative Protocol NACF IP CSCF RACF IP SIP CSCF CSCF SIP CSCF RACF RACF TV VoD QoE QoS FG- IPTV QoE QoS/QoE FG-IPTV QoE HD High DefinitionSD Standard Definition エラー復元技術 IP 1 Retransmission FEC : Forward Error Collection IPTV セキュリティ技術 IPTV IPTV 1316 情報処理 Vol.49 No.11 Nov. 008
IPTV 図 -6 IPTV で利用される典型的なプロトコル FG-IPTV ID プロトコル FG-IPTV IETF 9 IPTV -6 SIP RTSP RealTime Streaming ProtocolRTP Realtime Transport Protocol RTSP RTP RTP RTP BS/ CS/ MPEG- MPEG- TS MPEG- TS 9 Internet Engineering Task Force 映像 音声符号化方式 HD 1.5Gbps FG-IPTV -7, 8 IPTV MPEG- H.64/AVC MPEG- Video DVD-VIDEO BS/CS/ MPEG- Video MPEG-1 Video 1995 MPEG MPEG-1 Video DCTVC VLC 1 DCT VC VLC FG-IPTV MPEG- Video HD 15Mbps SD.5Mbps TV 3.18Mbps VoD H.64/AVC H.64/AVC Blu-ray 003 ITU-T MPEG MPEG-4 MPEG-4 1/4 CABAC FG-IPTV H.64/AVC HD 10Mbps SD 1.7Mbps TV.1Mbps VoD FTTH IPTV MPEG- ADSL H.64/AVC 007 H.64/AVC 情報処理 Vol.49 No.11 Nov. 008 1317
図 -7 IPTV で用いられる音声符号化方式 図 -8 IPTV で用いられる映像符号化方式 SVC Scalable Video Coding SVC H.64/SVC HD SD HD IPTV SVC IPTV アプリケーション IPTV EPG IPTV ホームネットワーク 端末 IPTV IPTV IP 1318 情報処理 Vol.49 No.11 Nov. 008
IPTV 図 -9 携帯電話, ホームネットワークと連携した将来の IPTV サービスイメージ IPTV IPTV STBPC 3 IPTV IPTV- GSI IPTV 1 LAN LTE Long Term Evolution 10 100Mbps -9 3 LAN 参考文献 1 Y.1910 IPTV Architecture, ITU-T 008 Y.Sup 5 ITU-T Y.1900-series, Supplement on IPTV Service Use Cases, ITU-T 008 3 IPTV Functions Supported by the IMS Subsystem, ETSI TS 18 07, ETSI 008 4 IPTV High Level Architecture, ATIS-0800007, ATIS IIF 007 5 Quality of Experience Requirements for IPTV Service FG IPTV- DOC-0184 0198,.ITU-T Focus Group on IPTV 007 0 9 9 里田浩三 k-satoda@cb.jp.nec.com --------------------------------------------------------------------------------------------- 1993 NEC 谷口邦弘 k-taniguchi@da.jp.nec.com --------------------------------------------------------------------------------------------- 1991 NEC 朝倉敬喜 asakura@ay.jp.nec.com --------------------------------------------------------------------------------------------- 1991 NEC 情報処理 Vol.49 No.11 Nov. 008 1319