High-Definition CESNET

Size: px

Start display at page:

Download "High-Definition CESNET"

Brendan Miles
5 years ago
Views:

1 High-Definition CESNET Petr Holub hopet@ics.muni.cz CESNET z. s. p. o. Laboratory of Advanced Networking Technologies Institute of Computer Science and Faculty of Informatics Masaryk University of Brno Internet2 Fall Member Meeting 2005, Philadelphia, /19

2 Outline HDV What is HDV? Sending Receiving Workflow Uncompressed HD What Is Uncompressed HD About? Point-to-Point (Multi)Point-to-Multipoint Setup for igrid 2005 Demo 2/19

3 What is HDV?... just an MPEG-2, really 25 Mbps bandwidth (c. f. DV) , 59.94, 60 Hz 3/19

4 Sending Receiving Workflow Sending: Windows XP SP2 + VLC FreeBSD 4/5/6 + fwcontrol patch 1 + VLC (+ netcat) Receiving: VLC (+ netcat) VLC issues VLC has serious problems reading out streams >10 Mbps from network independent buffering helps (buffer program, TCP under certain conditions) 1 hopet/hdv/ 4/19

5 Hands-on Example FreeBSD 4/5/6: 1. make sure you have complete /usr/src tree (src distribution) 2. cd /usr/src/usr.sbin/fwcontrol fetch patch -p1 <fwcontrol.patch make 3. now you have the HDV-enabled fwcontrol binary and man page: cd /usr/src/usr.sbin/fwcontrol./fwcontrol -h; nroff -man fwcontrol.8 less./fwcontrol -R sample.m2t 4. you can use VLC for streaming (problems with packet loss):./fwcontrol -R - vlc -vvv - --sout udp: ttl if you have netcat (/usr/ports/net/netcat) installed, you can do TCP (receiver) nc -l -4 -p 9000 vlc - (sender)./fwcontrol -R - nc n.b. receiver needs to be started first! UDP (receiver) nc -l -4 -u -p 9000 vlc - (sender)./fwcontrol -R - nc -4 -u UDP with buffer program (/usr/ports/misc/buffer) (receiver) nc -l -4 -u -p 9000 \ buffer -s 10k -b m 20m -p 5 vlc - (sender)./fwcontrol -R - nc -4 -u /19

6 HDV in VLC 6/19

7 Outline HDV What is HDV? Sending Receiving Workflow Uncompressed HD What Is Uncompressed HD About? Point-to-Point (Multi)Point-to-Multipoint Setup for igrid 2005 Demo 7/19

8 What Is Uncompressed HD About? What is usually understood under uncompressed HD? ( , Gbps, transmitted over SDI, SMPTE 292M) Bandwidth calculation: } 2200{{ 1125} total resolution bit/point fps 2/3 }{{} = bps 4:2:2 sampling Resolution: includes of effective resolution, but also adds up blanking lines, totaling Color depth: 10 bits/point/color plane = 30 bits/point Computers are usually unable to render more than 8 bits/color plane. Frame rate: 24p, 25p, 29.97p, 30p, 50i, 59.94i, 60i Sampling: usually 4:2:2 4:4:4 needed? You will also need double-link SDI... 8/19

9 What Is Uncompressed HD About? What is usually understood under uncompressed HD? ( , Gbps, transmitted over SDI, SMPTE 292M) Bandwidth calculation: } 2200{{ 1125} total resolution bit/point fps 2/3 }{{} = bps 4:2:2 sampling Resolution: includes of effective resolution, but also adds up blanking lines, totaling Color depth: 10 bits/point/color plane = 30 bits/point Computers are usually unable to render more than 8 bits/color plane. Frame rate: 24p, 25p, 29.97p, 30p, 50i, 59.94i, 60i Sampling: usually 4:2:2 4:4:4 needed? You will also need double-link SDI... 9/19

10 What Is Uncompressed HD About? What is usually understood under uncompressed HD? ( , Gbps, transmitted over SDI, SMPTE 292M) Bandwidth calculation: } 2200{{ 1125} total resolution bit/point fps 2/3 }{{} = bps 4:2:2 sampling Resolution: includes of effective resolution, but also adds up blanking lines, totaling Color depth: 10 bits/point/color plane = 30 bits/point Computers are usually unable to render more than 8 bits/color plane. Frame rate: 24p, 25p, 29.97p, 30p, 50i, 59.94i, 60i Sampling: usually 4:2:2 4:4:4 needed? You will also need double-link SDI... 10/19

11 What Is Uncompressed HD About? What is usually understood under uncompressed HD? ( , Gbps, transmitted over SDI, SMPTE 292M) Bandwidth calculation: } 2200{{ 1125} total resolution bit/point fps 2/3 }{{} = bps 4:2:2 sampling Resolution: includes of effective resolution, but also adds up blanking lines, totaling Color depth: 10 bits/point/color plane = 30 bits/point Computers are usually unable to render more than 8 bits/color plane. Frame rate: 24p, 25p, 29.97p, 30p, 50i, 59.94i, 60i Sampling: usually 4:2:2 4:4:4 needed? You will also need double-link SDI... 11/19

12 What Is Uncompressed HD About? What is usually understood under uncompressed HD? ( , Gbps, transmitted over SDI, SMPTE 292M) Bandwidth calculation: } 2200{{ 1125} total resolution bit/point fps 2/3 }{{} = bps 4:2:2 sampling Resolution: includes of effective resolution, but also adds up blanking lines, totaling Color depth: 10 bits/point/color plane = 30 bits/point Computers are usually unable to render more than 8 bits/color plane. Frame rate: 24p, 25p, 29.97p, 30p, 50i, 59.94i, 60i Sampling: usually 4:2:2 4:4:4 needed? You will also need double-link SDI... 12/19

13 Point-to-Point Working on Linux The only low-latency HD card: DVS Centaurus 2 (and HDstation) Turns out Centaurus is not as low latency as HD station: frame-by-frame capture only, no memory mapping HDstation is no longer produced, more than 2 more expensive Only digital audio I/O (even with separately licensed Audio08 option) Started with UltraGrid 3 No full HD support (only formats) /19

14 Point-to-Point cont d We have rewritten the UltraGrid supports modes, algorithms for 10 b 8 b conversion for local display, linear blend deinterlace algorithm assembly optimized for AMD64 Local overlay-based display avoids need for Centaurus cards on display side, must perform 10 b 8 b conversion (no 10 b overlay support) must perform deinterlace i-modes better quality achieved by doubling display rate, but we are unable to sync precisely to monitor refresh rate (cf. AJA HDP) currently using NVidia cards + HD LCD 14/19

15 (Multi)Point-to-Multipoint Multicast We have experienced problems running with multiple high-bandwidth streams, esp. over heterogeneous networks. Software based reflectors Our own software in multiple incarnations: from slim ultra-fast implementations to full-fledged modular reflectors based on active router concepts. Limited only by capacity of underlying hardware (e. g. dual-amd64 with Chelsio T Gbps on UDP). Underlying network switches/routes only unicast data, which is what the network is optimized for. 15/19

16 Setup for igrid 2005 Demo Based on low-cost SONY HVR-Z1E cameras + AJA HD10A converters. Software display. Data replication at StarLight (Chicago) using high-performance software reflector. 16/19

17 Outline Capture part: HDV Uncompressed HD PC (IA32/AMD64) Component analog HD AJA HD10A HD-SDI DVS Centaurus Uncompressed raw HD UltraGrid SONY HVR-Z1E Chelsio switch or router StarLight Display part: PC (AMD64) Chelsio UltraGrid DVI-D/VGA Display device (LCD, beamer) PC (AMD64) Chelsio UltraGrid DVI-D/VGA Display device (LCD, beamer) 17/19

18 dual AMD64 Chelsio LAN-PHY WAN-PHY Czech Republic dual AMD64 Chelsio LAN-PHY switch Lousiana State University dual AMD64 Chelsio LAN-PHY San Diego 1.5 Gbps data streams 18/19

19 Thank you for your attention! Q/A? 19/19

High-Definition Multimedia for Multiparty Low-Latency Interactive Communication

High-Definition Multimedia for Multiparty Low-Latency Interactive Communication Petr Holub a,b, Luděk Matyska a,b,, Miloš Liška a,b, Lukáš Hejtmánek a,b, Jiří Denemark a,b, Tomáš Rebok a,b, Andrei Hutanu