The Mythos Project: The Mythos Project: a distance learning experience a distance learning experience in the field of lyric music in the field of lyric music P. Castoldi, A. Morelli, P. Vascelli TERENA Networking Conference (TNC 2003)
cnit cnit Some facts about facts about the “ the “Mythos Mythos” project ” project Some Funding Funding Partnership Partnership € 400.000 (CNIT budget) Funding body body Funding Project duration duration Project July 2000 – Dec. 2002 Project Objective: distance learning for theater actors chorus singers, orchestra professors and conductors
cnit cnit Goals of the project of the project Goals � Distance learning Distance learning & remote & remote teaching teaching � – Live and Live and recorded individual lectures recorded individual lectures – – Live and – Live and recorded recorded orchestra orchestra lectures lectures – Web Web based based training training – available: : available – In the In the primary primary project project nodes with QoS nodes with QoS ( (thanks to thanks to – CNIT network) ) CNIT network – Through the Through the Internet Internet as as a best a best effort fruition effort fruition ( (from from – any Internet Internet host host) ) any
cnit cnit Subnetwork of of Subnetwork CNIT network CNIT network • layer 2 transparency • layer 2 transparency • ATM and Frame Relay links ATM and Frame Relay links • • multicast and IPv6 support multicast and IPv6 support • • CISCO routers in each node • CISCO routers in each node • Autonomous system since Autonomous system since • May 2001 May 2001 Mythos Mythos • Tree topology • Tree topology network network • Nap Naples is primary les is primary star center star center • • Parma Parma is is a a secondary secondary star star • center center Long distance carriers Long distance carriers involved: : involved • Telecom Telecom Italia Italia • • Albacom • Albacom
cnit cnit 217.9.67.100 The Mythos Mythos The Busseto Theater network and network and Cisco 3600 Computer Computer Computer Computer Computer Computer Multimedia the Internet (1) the Internet (1) Multimedia Lab Lab SINFORM - BO Computer Computer Computer Computer BUSSETO 217.9.67.67 Sinform - BO CNIT Parma Cisco 3600 Computer Computer Computer Cisco 3600 Computer Computer Multimedia Lab Traceroute Traceroute CNIT PARMA 1/2 Mb/s analysis analysis 1/2 Mb/s 1/2 Mb/s ComputerComputerComputer CNIT ComputerComputer Star center Router INTERNET CISCO 7500 access from 217.9.67.67 217.9.67.67 from Sinform LAN (pre-existing to Mythos project) Sinform INTERNET to 217.9.67. 217.9.67.100 100 to access INTERNET Domestic user Modem
cnit cnit Teatro Busseto Cisco 3600 The Mythos Mythos The Computer Computer Computer Computer Computer Computer Multimedia Lab network and network and Multimedia Lab Computer Computer Computer Computer BUSSETO SINFORM - BO 217.9.67.67 the Internet ( (2 2) ) the Internet Sinform - BO CNIT Parma Cisco 3600 Computer Computer Computer Cisco 3600 Computer Computer Multimedia Lab CNIT PARMA 1/2 Mb/s www.odl.net 1/2 Mb/s 1/2 Mb/s Traceroute Traceroute ComputerComputerComputer CNIT analysis analysis ComputerComputer Star center router INTERNET CISCO 7500 access Sinform LAN (pre-existing to Mythos project) Sinform INTERNET access from 217.9.67.67 217.9.67.67 from INTERNET to www. www.odl odl.net .net to Domestic user Modem (195.250.224.18) (195.250.224.18)
cnit cnit Videoconferencing on on an an IP network IP network Videoconferencing The delay problem for delay problem for music music signals signals The The delay delay in a in a videoconferencing videoconferencing system system is is due due to two effects to two effects: : The 1. Signal progation delay from source to destination ( (cannot be eliminated cannot be eliminated) ) 1. Signal progation delay from source to destination 2. Coding delay of the video of the video signal signal ( (still dominant but still dominant but can can be reduced be reduced) ) 2. Coding delay : Tedious phenomena due to delay : Tedious phenomena due to delay 1. 1. Absolute Absolute delay that causes delay that causes asynchronicity asynchronicity between time of the actual event and between time of the actual event and projection of the event on the remote screen projection of the event on the remote screen 2. Small delay variations (“jitter”) cause sudden acceleration and deceleration of the deceleration of the 2. Small delay variations (“jitter”) cause sudden acceleration and video motion video motion NETWORK SINFORM BOLOGNA SINFORM BOLOGNA G. VERDI G. VERDI THEATER THEATER IN BUSSETO BUSSETO IN
cnit cnit Delay in live in live videoconferencing videoconferencing Delay Teacher and remote and remote student student Teacher NETWORK 1 1 G. VERDI G. VERDI THEATER THEATER SINFORM SINFORM BOLOGNA BOLOGNA BUSSETO BUSSETO NETWORK 2 2 G. VERDI G. VERDI THEATER THEATER SINFORM BOLOGNA SINFORM BOLOGNA BUSSETO BUSSETO 3 3 NETWORK G. VERDI G. VERDI THEATER THEATER SINFORM BOLOGNA SINFORM BOLOGNA BUSSETO BUSSETO • Absolute delay between Absolute delay between live scene and live scene and projected projected remote scene remote scene •
cnit cnit Live lecture lecture broadcasting broadcasting Live FACE TO FACE LIVE LECTURE LIVE LECTURE BROADCASTED TO A REMOTE AUDIENCE BROADCASTED TO A REMOTE AUDIENCE FACE TO FACE NETWORK G. G. VERDI VERDI THEATER THEATER BUSSETO BUSSETO SINFORM BOLOGNA SINFORM BOLOGNA NETWORK G. VERDI G. VERDI THEATER THEATER BUSSETO BUSSETO SINFORM SINFORM BOLOGNA BOLOGNA • Education service similar to • Education service similar to a a plain plain TV program TV program • • Added value with respect to Added value with respect to a a plain broadcast plain broadcast TV TV service service: : possibility possibility of interaction of interaction from from the audience side the audience side • The The delay problem is not significant delay problem is not significant: : the the logical logical interaction interaction is bidirectional but is bidirectional but one one- -way alternate way alternate •
cnit cnit Live lecture to lecture to a remote class a remote class Live FACE TO FACE LIVE LECTURE WITH STUDENT(S) AND TEACHER REMOTE ONE ONOTHER LIVE LECTURE WITH STUDENT(S) AND TEACHER REMOTE ONE ONOTHER FACE TO FACE NETWORK TEATRO TEATRO G. G. VERDI DI DI VERDI BUSSETO BUSSETO SINFORM BOLOGNA SINFORM BOLOGNA NETWORK TEATRO TEATRO G. G. VERDI DI DI VERDI BUSSETO BUSSETO SINFORM SINFORM BOLOGNA BOLOGNA • Interactive Interactive individual lecture individual lecture or tele or tele- -direction of a remote orchestra or direction of a remote orchestra or chorus chorus • • • There is absolute synchronicity There is absolute synchronicity of of screen screen video and live performance video and live performance only only on the on the opposite opposite side side with with respect to the conductor. respect to the conductor. • The return The return signal signal towards towards the director the director is is more or more or less asyncronous less asyncronous depending depending on the on the rythm rythm •
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cnit cnit Tele- -direction direction session session Tele Projected full full- -screen screen Projected Thumbnails Thumbnails
cnit cnit Conclusions Conclusions � Technical issues Technical issues � – Delay does not appear to be Delay does not appear to be a a primary problem primary problem – – Network – Network links speed links speed can can be increased from be increased from 2/1 2/1 Mb Mb/s /s to 2/2 2/2 Mb Mb/s, CBR /s, CBR instead instead of VBR? of VBR? to � Towards Mythos Towards Mythos II ? II ? � – It will involve other italian regions It will involve other italian regions and and agreements agreements – among them among them – We have to spend We have to spend more time more time to to educate orchestra educate orchestra – conductors to the the use use of live of live videoconference videoconference conductors to
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