DongHoon Yi 2005/ 1/ 26 Networked Media Laboratory Dept. of Information & Communications Gwang-Ju Institute of Science & Technology.

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Presentation transcript:

DongHoon Yi 2005/ 1/ 26 Networked Media Laboratory Dept. of Information & Communications Gwang-Ju Institute of Science & Technology APAN 19 th Bangkok Meeting Sub-Gbps Uncompressed HDTV over IP Trials

- 2 - Contents Uncompressed HD Streaming system Decompressed-Live HDV (221Mbps) Uncompressed-Stored HDTV (885Mbps) Compressed HDTV (SMPTE 305M, 270Mbps) Streaming Uncompressed HDTV (SMPTE 274M,1.2Gbps) Streaming

- 3 - Uncompressed HD streaming system

- 4 - Decompressed-Live HDV (221Mbps) Goal: Pre-experiments of several hundreds Mbps HDTV stream Too expensive HDTV camera Pre-development of uncompressed HDTV system Feature 1280x720 progressive, 30fps YV12: Planar YUV format, 8-bpp 2x2 U and V planes UDP Socket Tuning Burst sending and then rest Sender - Non-blocking, Big Sending Buffer Blocking mode can avoid packet loss in sending buffer  Performance is poor (Data loss between sender module and decoder module) Better performance by Non-blocking mode Avoid packet loss by big sending buffer Receiver - Blocking, Big Receiving Buffer Non-blocking receiving socket waste computation time to check whether it receive or not.

- 5 - Decompressed-Live HDV (221Mbps) Implementation (based on Windows DirectX) Experiments KAIST  GIST IPv6 VLAN 220~270Mbps Client Server

- 6 - Uncompressed-Stored HDTV (885Mbps) System Details

- 7 - Uncompressed-Stored HDTV (885Mbps) H/W Issues NIC - Different NIC shows different performance Intel 1Gbps NIC showed the best performance Disk read up speed Old type of DISK I/O can be bottleneck LAN cable Cat6 is better than Cat5 S/W Issues Burst streaming By giving some delay inter-packet, burst packet sending is fixed. Other Issues Acquisition of 720p video file. Generated by 3D production tool (Alias Maya) Future works 1080i supports Multi-channel 1080i streaming

- 8 - Uncompressed-Stored HDTV (885Mbps) Demonstration KOREN Workshop (Dec. 3th 2004)

- 9 - Compressed HDTV (SMPTE 305M, 270Mbps) Streaming Demonstration between Korea and Barcelona System information ResearchChannel’s S/W Resolution: 1080i Compressed by SONY HDCAM Codec Transport format: SMPTE 305M(SDTI) Sender Workstation with Gigabit NIC Stored HD file Receiver Decoder Box SONY HDCAM Decoder, Demultiplexer, D/A Converter Workstation with Gbit NIC, SDTI Interface card(VideoPump) Display device

Compressed HDTV (SMPTE 305M, 270Mbps) Streaming International Lightpath provisioning

Compressed HDTV (SMPTE 305M, 270Mbps) Streaming System Specifications Audio AMP, Mixer Audio D/A Converter Video D/A Converter Demuxer, Decoder Audio Speaker 270Mbps Stream Receiver System PDP Display

Uncompressed HDTV (SMPTE 274M,1.2Gbps) Streaming Developed in GIST HD Contents SONY HDCAM, SMPTE 274M standard 1920X1080/59.94/I, 1125 lines per frame (Active line 1080 lines) Server NAS (Storage system), Workstation with GbE. Client Workstation with GbE. VideoPump, SONY Demultiplexer and D/A Converter, Display device (PDP)