Transcript Internet Radio History - T&T Software WWW Server

Internet Radio History
How It All Began
How The Internet Started
Computer networks
were originally
designed for the
military
Academics were
among the first to use
the internet
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Way to communicate
and keep up to date
with information in
their fields
Timeline
1920’s- radio brought recorded music into
people’s everyday lives
1989 & 1990- World Wide Web developed
by Tim Berners-Lee
Early 1990’s- Congress approved the
internet for commercial use
Mid 1990’s- first internet radio stations
introduced
Timeline
1998- President Clinton signed Digital
Millennium Copyright Act
End 1990’s- thousands of internet radio
stations and music sites online
2000’s- stations vary from huge networks,
like Yahoo, to small individual owners
Issues
When internet radio
first started the sound
quality was poor and
interrupted
Digital Millennium
Copyright Act
Food For Thought
Today there is more than 500,000 hrs of
live broadcast every week
Currently there is over 4,000 internet radio
stations of some sort
Net Population of people with the internet
is about 410 million people
Radio took 30yrs to reach 50 million
people, TV 13 yrs………the Internet ONLY
FOUR HOURS
Internet Radio
Technology
How it all works
Two Aspects of Broadcasting
DJ Set Lists
Podcast Radio Shows
Broadcasting (DJ Set Lists)
Hardware Used
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Any PC or MAC
A server
Software Used
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iTunes
ICES
ICECAST2 (DNAS)
APACHE
PHP
Perl
mySQL
Hardware
PC/MAC
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Runs iTunes.
Transfers data (music) to server
Server “A”
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Is a Linux server
Has all the music stored in mp3 format
Runs a mySQL database for music
organization / ratings control
Runs a piece of software called ices.
Software
iTunes
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Program that rips music from CDs to a hard drive, storing them in mp3 format
ICES
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the playlists / music files / mp3s and converts them into a stream to be broadcast
to the DNAS
ICECAST2 (DNAS)
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Multiplexer where all the listeners connect to
APACHE
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Web server where DJ interface runs off of
PHP
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Scripting language for simple web based programs (what the web DJ interface
was written in)
PERL
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Another simple scripting language (what the spooling / db interaction was written
in)
mySQL
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Open source DB Server Software
How It All Works Together
Broadcasting (Podcasts)
Hardware
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Any MAC
Server
External Devices
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Microphone
iSight's omni-directional mic
Software
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Audacity
Records DJs, edits, and
saves audio files in mp3
format
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Garage Band
mixes recorded “DJ” mp3s
with the song mp3s
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ICES
ICECAST2 (DNAS)
How It All Works Together
MAC
Podcast
mp3
Server A
Garage
Band
mp3
mp3
Interne
t
mp3
Audacit
y
D.N.A.S.
Mp
3
Mp
3
Mp
3
Listene
r
Listener
The Pros and Cons of
Internet Radio
How it affects us
Internet Radio Pros
Simple
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Only requires a
computer, the internet,
and a media player
iTunes
Real media player
Windows media player
Little or no cost
Some stations require a
subscription fee, but
almost all of them do
not
Internet Radio Pros (cont’d)
No static! 
Rising artists, bands,
etc. can be
recognized easily
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More voices are heard
Globally used
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Cultural advantages
Internet Radio Cons
Digital Divide
Anyone can have a
station
Piracy, bootleg copies of
music
Censorship laws???
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FCC
Communications Decency
Act
Unconstitutional- First
Amendment
Butler vs. Michigan
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First Amendment
becoming history???
Satellite Radio
Ground Station transmits a
signal to the satellites, which
bounce the signals back down
to radio receivers on the
ground.
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Sirius
Three SS/L-1300 satellites in
an elliptical formation
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Guarantees that each
satellite spends 16 hours a
day over the continental
U.S., with at least one
satellite over the U.S. at all
times.
XM
Two Boeing HS 702 satellites,
in a Geostationary Earth Orbit
(GEO)
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Type of orbit most
commonly used for
communication.
Mobile unit, convenient