UHD (8K) Television Coverage of Large Sports Events in Brazil. Reliable International Media Transmission by Using Redundant Transmission and FEC

Transcription

1 UHD (8K) Television Coverage of Large Sports Events in Brazil Reliable International Media Transmission by Using Redundant Transmission and FEC Hiroyuki Kimiyama NTT Network Innovation Laboratories

2 Introduction Unique global joint project: Public viewing of 2014 FIFA World Cup Brazil Transmit 8K Super Hi-Vision (SHV) over IP network Only fiber networks (not satellites) Long distance transmission: 23,000km from Rio de Janeiro to Tokyo Connecting southern and northern hemispheres Using various shared networks with different characteristics " Challenge: Transmitting live video over Shared networks How to secure the reliability of video transmission in real time? [ 2 ]

3 SHV Camera Video Rec/Play Audio Rec/Play 22.2ch audio mic Overview of 8K PV System Compressed with NHK s H.264 encoder and multiplexed into 280Mbps MPEG Transport Stream (TS) Encrypted by AES and added LDGM-FEC Transmitted as 300-Mbps UDP/IP real-time video stream Production Video SW Audio mixer Encoder TS/IP IF Transmission Secure IP FEC Global Shared IP Network Secure IP FEC TS/IP IF Decoder Audio amplifier Screening SHV LCD /Projector 22.2ch audio [ 3 ]

4 Reliability of Transmission over the World Wide Network Challenge: How to secure reliability of multi-domain network against IP packet loss, where the system consists of many heterogeneous elements? Approaches: We applied the following both two methods Forward error correction (FEC) mechanisms at application level Redundant transmission If FEC could NOT recover lost packets [ 4 ]

5 Basics of Forward Error Correction Calculate redundant(fec) data from video data to transmit. Reconstruct the lost data of video from the received data. For example, the data with 10% loss can be rescued by adding 10% redundant data preliminarily. Ideally we can this, but quite difficult in practice TX RX Video Data FEC Calc. FEC Data Transmit Video & FEC IP-NW IP packet Erasure (Loss) Reconst - ructed Data Estimate data in the lost packet from received video data and FEC data [ 5 ]

6 Software Implementation of FireFort LDGM-FEC PC/Linux box for 8K-PV Large block size against long burst loss Up to 150,000 blocks, 20% redundancy Tolerance for loss of >20,000 packet sequence AES128 encryption, MMT packet format Proxy-type implementation Just inserted into IP connection of CODECs. Secure IP Terminator (TX) Secure IP Terminator (RX) FEC-Terminator (IP proxy type) SHV Encoder 2TS IP AES Encryption LDGM-FEC Encode MMT Packet TX Shared IP Networks Jitter Packet Loss MMT Packet RX LDGM-FEC Decode AES Dec IP 2TS SHV Decoder TS/IP-IF MMT Packet Transmission IP/TS-IF Robust LDGM-FEC Real-time AES Encryption/Decryption 8K LCD/ Projector [ 6 ]

7 Redundant Transmission Transmit two 8K-video streams with FEC to recover from unexpected long-term burst loss caused by: Long-time disruption by unscheduled maintenance Malfunction, and power outage of network links and nodes Fiber cutoff Secure IP Terminator (TX) Packet Loss Jitter Secure IP Terminator (TX) TS IP LDGM-FEC ENCODE Packet Duplicate UNIQUE FILTER LDGM-FEC DEC IP TS TS/IP-IF Jitter Packet Loss TS/IP-IF [ 7 ]

8 International Network Diagram Three transmission systems use the multi-path/single-path NW connections FEC System A (Route #3 + #5) : Full-duplication of Networks & Nodes FEC System B (Route #2 + #4) : Full-dup. of NWs, but common in Miami-node FEC System C (Route #3 only) : Backup. NHK B Shibuya Tokyo A C Route #5 Tokyo Route #2 Route #4 Route #1 Route #3 GEM net2 SINET4 Seattle NYC Internet2 + L2->L3 conv. + Miami RNP Interna*onal #1 NTT V- LINK L2 connections RNP Interna*onal #2 (New submarine) RedClala Sao Paulo RNP Domes*c Back- bone Link- Aggrega*on (Submarine + Oi) Rio B RNP A PoP C [ 8 ]

9 Summary Succeeded in 8K PV of 2014 World Cup Brazil Keys to success: Collaboration of R&E network organizations High reliable IP transmission technology for shared networks High reliable IP transmission technology based on: High-efficiency LDGM-FEC Redundant transmission with FEC Configuration for redundant transmission Designing multi-path network connections [ 9 ]

10 UHD (8K) Television Coverage of Large Sports Events in Brazil Reliable International Media Transmission by Using Redundant Transmission and FEC Hiroyuki Kimiyama NTT Network Innovation Laboratories