HDTV & Access Grid Session (Application Technology Track, APAN Cairns Austrailia Meeting, July 2-7, 2004) Access Grid with High-quality Video Service JongWon Kim and ACE Team Ace@netmedia.gist.ac.kr Networked Media Laboratory, Dept. of Information and Communications Gwangju Institute of Science and Technology (GIST) D EPT. OF I NFO. & C OMM., GIST
Motivation High-quality video services for Access Grid Toolkit to promote advanced collaboration environment Limitation of current Access Grid Toolkit (2.1.x) Low-resolution VIC-based video (300Kbps CIF sized image) only with the existing Video {Producer, Consumer} Service Gbps-range R&E Networks enables bandwidth-demanding high- quality media service (DV and HDV quality). Showcasing the prototype high-quality video service support for Access Grid. DV (digital video): around 30Mbps 720x480 DV encoding HDV (high-definition digital video): 19.2Mbps MPEG-2 TS encoded 1280x720 30progressive (JVC HDV Camcorder) D EPT. OF I NFO. & C OMM., GIST
HDV HDV Format MPEG-2 Video in TS (Transport Stream) Element Stream Type: Video: MPEG2 (ISO/IEC 13818-2), Audio: MPEG1 (ISO/IEC 11172-3) 19.2 Mbps High-Definition Digital Video Recording and Playback on a DV cassette tape http://www.hdv-info.org/ Adobe Systems Incorporated; Canopus Co., Ltd. ; CineForm, Inc. ; FOCUS Enhancements, Inc ; Hamamatsu Photonics K.K. ; KDDI R&D Laboratories; Miranda Technologies Inc; NewSoft Technology Corp; Pinnacle Systems, Inc; Sony Pictures Digital Networks; Ulead Systems, Inc. D EPT. OF I NFO. & C OMM., GIST
HDV Camcorders JVC GR-HD1 Camcorder Support IEEE1394 interface. Encoding Delay: about 1/2 sec. Low-cost encoding chip by a limited function set of ATSC rates: 720 30P, 480 60P, 480 30i => 1280x720/30p (1280x720, 30fps) GOP of 6: IBBPBBI => encoding delay is approx 1/2 second Single 1/3" chip CCD array in 720P mode (16:9) is only 840,000 pixels ( pro 720p cameras use a 3 chip array of 2/3" CCDs with about 1.1M pixels; pro 1080i cameras use a 3 chip array of 2/3" 2.2M pixels CCD ’ s) 3CCD HDV Camcorders (TBA) Sony & JVC 3 CCD; 1080i; MPEG-2 TS D EPT. OF I NFO. & C OMM., GIST
MPEG-2 Video Established in 1994 Support both interlaced and non-interlaced video Designed for higher bandwidth Wider range of frame sizes (including HDTV) Compressed video/audio data rate up to 80 Mbit/s Example: compress full CCIR video (720 x 486 x 30Hz) with 5 channels audio at 5 Mbit/s Four scalable modes in the MPEG-2: only available on Main+ and High profiles Spatial Scalability SNR Scalability Temporal Scalability Data Partitioning D EPT. OF I NFO. & C OMM., GIST
HDV over IP (Hiroshima/KAIST/GIST …) MPEG2 Decoder ROBST system PCI Card VGA MPEG2TS Input Output BNC ( 19.7 Mbps, 720/30p) IEEE1394 Cable Media packet Linux-PC NIC NIC Internet Internet De/capsulate RTP HDTV/MPEG2/RTP 20Mbps (without FEC). FEC processing Sender Sender 22-30Mbps (with FEC). FEC media media FEC MPEG2 Streaming Shaper PCI Card Receiver Receiver IP Network ROBST4 – Hiroshima Univ. IP Network HDVTS - KAIST Videolan VLS/VLC modification – K-JIST D EPT. OF I NFO. & C OMM., GIST
Comparison of HDV, DV, VIC VIC (352x240) around 300kbps DV (720x480) around 30Mbps HDV (1280x720) around 20Mbps D EPT. OF I NFO. & C OMM., GIST
Versatile Video Support for AG Unified Video Program Interface Enable AGTk to support various video programs and formats with unified interfaces Level 0: basic inter-working with AGTk Level 1: + network-adaptation capability (self, AG-coordinated) Level 2: + A/V synchronization with speaking node identification AG Node Versatile Video Formats AG Node HDV Multicast-enabled DV Network AG Node Stereo D EPT. OF I NFO. & C OMM., GIST
Existing Multicast Address Allocation AGTk for VIC allocates a single multicast address shared by all video producer services of all participating nodes � A shared multicast address for all video streams Disadvantages The amount of consumed bandwidth depends on the number of video stream, not selected video stream. If AG nodes use high-quality video (e.g., 30Mbps DV), this leads to too big bandwidth. Video stream 2 A shared multicast address Video stream 1 Video stream 3 D EPT. OF I NFO. & C OMM., GIST
D EPT. OF I NFO. & C OMM., GIST
Flexible Multicast Address Allocation & Management A unique multicast address per each group of video producer services Various types of address allocation support Possible to manage separate policy for each group Multicast 1 Multicast 2 Multicast 1 Multicast 2 Multicast 3 DV HDV VIC DV HDV VIC DV HDV VIC DV HDV VIC Group Multicast 1 Multicast 1 Multicast 2 Multicast 3 DV VIC VIC DV HDV Other DV VIC VIC DV HDV Other D EPT. OF I NFO. & C OMM., GIST
Extended Video Services Extended Video {Producer, Consumer} Services using two types of multicast addresses Venue Server Node Service Venue Server Node Service Announcement-only address Video transport address Service Manager Service Manager Announcement-only address Announcement-only address Video transport address Extended Video Extended Video Extended Video Video Video Extended Video Extended Video Extended Video Video Video Producer Service Producer Service Consumer Service Producer Service Consumer Service Producer Service Producer Service Consumer Service Producer Service Consumer Service SAP Server SAP Server SAP Client SAP Server SAP Server SAP Client VIC VIC VIC VIC … DV HDV HDV DV DV HDV HDV DV D EPT. OF I NFO. & C OMM., GIST
Main Components – Modified Venue Server Side Unique Multicast Address Allocation for each Video Producer Service Venue Client Side Extended Video {Producer, Consumer} Services SAP Server and SAP Client Linking DVTS & VLC (VideoLan Client) with AGTK DV and HDV support D EPT. OF I NFO. & C OMM., GIST
Extended Video Services AGTk 2.1.x SAP Server D EPT. OF I NFO. & C OMM., GIST
SAP Server (Temporary) Procedures After a user selects the type of video (DV, HDV), SAP Server executes the video application SAP Server announces its session information via announcement-only multicast periodically SAP Server is terminated by Extended Video Producer Service via SOAP call D EPT. OF I NFO. & C OMM., GIST
SAP Client (Temporary) Procedures After user selects video sessions, SAP Client plays the selected videos. SAP Client listens session information via announcement-only multicast SAP Client is terminated by Extended Video Consumer Service via SOAP call D EPT. OF I NFO. & C OMM., GIST
AG with DV (Year 2003) Linking DV to AG (with Python/C++ based implementation) D EPT. OF I NFO. & C OMM., GIST
AG with HDV/DV (Year 2004) Linking HDV/DV to AG (with python based implementation) RAT SAPClient Venue VLC Client RAT D EPT. OF I NFO. & C OMM., GIST
AGR 2004 Showcase Demonstration D EPT. OF I NFO. & C OMM., GIST
AG Showcase Demo Scenario D EPT. OF I NFO. & C OMM., GIST
KoreaV6 IPv6@HDTV Deployment Infrastructure D EPT. OF I NFO. & C OMM., GIST
HDTV Activities in GIST Under Construction ANF HDTV TF KoreaV6 IPv6@HDTV (with ANF HDTV & IPv6 TFs) HDTV VOD Streaming APAN HDTV WG AG with HDV (with ANL AGTk Team & AG Korea) D EPT. OF I NFO. & C OMM., GIST
Conclusion & Future Works The proposed system enables Access Grid to support various video formats and to improve immersion for advanced collaboration environments. Tradeoff between delay and bandwidth DVTS request 30Mbps for DV delivery without encoding delay VLC in transcoding mode can reduce bandwidth demand down to 3Mbps for both DV/HDV delivery with additional 1~2 sec delay Future works Unified DV/HDV support via VideoLAN: stablization, low-latency, … Refined implementation of SAP Server / Client: RFC2974-based SAP, merge with ExtendedVideo{*}Services? Network-adaptive realization of high-quality video for AG (Check out “Design of Network-adaptive Extended Video Services for Access Grid”) D EPT. OF I NFO. & C OMM., GIST
Gwangju Institute of Science & Technology Thank you! Send Inquiry to jongwon@gist.ac.kr http://netmedia.gist.ac.kr D EPT. OF I NFO. & C OMM., GIST
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