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The Mythos Project: The Mythos Project: a distance learning - - PowerPoint PPT Presentation

Nov 15, 2022 328 likes •467 views

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

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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

TERENA Networking Conference (TNC 2003)

  • P. Castoldi, A. Morelli, P. Vascelli
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Some Some facts about facts about the “ the “Mythos Mythos” project ” project Partnership Partnership

Funding Funding

€ 400.000 (CNIT budget)

Funding Funding body body Project Project duration duration

July 2000 – Dec. 2002

Project Objective: distance learning for theater actors chorus singers, orchestra professors and conductors

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Goals Goals of the project

  • f the project
  • 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

  • rchestra 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 any Internet Internet host host) )

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  • 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

  • Tree topology

Tree topology

  • Nap

Naples is primary les is primary star center star center

  • Parma

Parma is is a a secondary secondary star star center center Long Long distance carriers distance carriers involved involved: :

  • Telecom

Telecom Italia Italia

  • Albacom

Albacom

Subnetwork Subnetwork of

  • f

CNIT network CNIT network

Mythos Mythos network network

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The The Mythos Mythos network and network and the Internet (1) the Internet (1)

Sinform INTERNET access

INTERNET

Sinform LAN (pre-existing to Mythos project)

Star center Router CISCO 7500 Busseto Theater Cisco 3600 Sinform - BO Cisco 3600 CNIT Parma Cisco 3600

1/2 Mb/s 1/2 Mb/s CNIT INTERNET access

ComputerComputerComputer ComputerComputer Computer Computer Computer Computer Computer

Multimedia Lab SINFORM - BO

Computer Computer Computer Computer Computer

Multimedia Lab BUSSETO

1/2 Mb/s

Computer Computer Computer Computer Computer Multimedia Lab

CNIT PARMA

Modem

Domestic user

Traceroute Traceroute analysis analysis from from 217.9.67.67 217.9.67.67 to to 217.9.67. 217.9.67.100 100

217.9.67.67 217.9.67.100

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The The Mythos Mythos network and network and the Internet the Internet ( (2 2) )

Sinform INTERNET access

INTERNET

Sinform LAN (pre-existing to Mythos project)

Star center router CISCO 7500 Teatro Busseto Cisco 3600 Sinform - BO Cisco 3600 CNIT Parma Cisco 3600

1/2 Mb/s 1/2 Mb/s CNIT INTERNET access

ComputerComputerComputer ComputerComputer Computer Computer Computer Computer Computer

Multimedia Lab SINFORM - BO

Computer Computer Computer Computer Computer

Multimedia Lab BUSSETO

1/2 Mb/s

Computer Computer Computer Computer Computer Multimedia Lab

CNIT PARMA

Modem

Domestic user

Traceroute Traceroute analysis analysis from from 217.9.67.67 217.9.67.67 to to www. www.odl

  • dl.net

.net (195.250.224.18) (195.250.224.18)

217.9.67.67 www.odl.net

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Videoconferencing Videoconferencing on

  • n an

an IP network IP network The 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: :

1. 1. Signal progation delay from source to destination Signal progation delay from source to destination ( (cannot be eliminated cannot be eliminated) ) 2. 2. Coding delay Coding delay of the video

  • f the video signal

signal ( (still dominant but still dominant but can can be reduced be reduced) )

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. 2. Small delay variations (“jitter”) cause sudden acceleration and Small delay variations (“jitter”) cause sudden acceleration and deceleration of the deceleration of the video motion video motion

SINFORM SINFORM BOLOGNA BOLOGNA

  • G. VERDI
  • G. VERDI THEATER

THEATER IN IN BUSSETO BUSSETO

NETWORK

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Delay Delay in live in live videoconferencing videoconferencing

Teacher Teacher and remote and remote student student

NETWORK

SINFORM SINFORM BOLOGNA BOLOGNA

G.

  • G. VERDI

VERDI THEATER THEATER BUSSETO BUSSETO

1 1

SINFORM SINFORM BOLOGNA BOLOGNA

G.

  • G. VERDI

VERDI THEATER THEATER BUSSETO BUSSETO

2 2

SINFORM SINFORM BOLOGNA BOLOGNA

G.

  • G. VERDI

VERDI THEATER THEATER BUSSETO BUSSETO

3 3

  • Absolute delay between

Absolute delay between live scene and live scene and projected projected remote scene remote scene

NETWORK NETWORK

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Live Live lecture lecture broadcasting broadcasting

FACE TO FACE FACE TO FACE LIVE LECTURE LIVE LECTURE BROADCASTED TO A REMOTE AUDIENCE BROADCASTED TO A REMOTE AUDIENCE

SINFORM SINFORM BOLOGNA BOLOGNA G.

  • G. VERDI

VERDI THEATER THEATER BUSSETO BUSSETO SINFORM SINFORM BOLOGNA BOLOGNA G.

  • G. VERDI

VERDI THEATER THEATER BUSSETO BUSSETO

  • 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

  • f 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

  • ne-
  • way alternate

way alternate NETWORK NETWORK

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Live Live lecture to lecture to a remote class a remote class

FACE TO FACE FACE TO FACE LIVE LECTURE WITH STUDENT(S) AND TEACHER REMOTE ONE ONOTHER LIVE LECTURE WITH STUDENT(S) AND TEACHER REMOTE ONE ONOTHER

SINFORM SINFORM BOLOGNA BOLOGNA TEATRO TEATRO G. G. VERDI VERDI DI DI BUSSETO BUSSETO SINFORM SINFORM BOLOGNA BOLOGNA TEATRO TEATRO G. G. VERDI VERDI DI DI BUSSETO BUSSETO

  • Interactive

Interactive individual lecture individual lecture or tele

  • r tele-
  • direction of a remote orchestra or

direction of a remote orchestra or chorus chorus

  • There is absolute synchronicity

There is absolute synchronicity of

  • f screen

screen video and live performance video and live performance only

  • nly on the
  • n the opposite
  • pposite side

side with with respect to respect to the conductor. 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

  • n the rythm

rythm NETWORK NETWORK

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Tele Tele-

  • direction

direction session session

Projected Projected full full-

  • screen

screen Thumbnails Thumbnails

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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 to 2/2 2/2 Mb Mb/s, CBR /s, CBR instead instead of VBR?

  • f VBR?
  • 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 conductors to the the use use of live

  • f live videoconference

videoconference