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COMM 3353: Communication Web Technologies I . Chapter 3a: Internet Radio. www.class.uh.edu/comm/classes/comm3353/ppt/_Pres3a.html. Internet Radio. The Growth of Internet Radio Internet Radio Versus Over-The-Air Radio Real-Time Audio Netcasting Networks Cybercasting Radio Stations.

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comm 3353 communication web technologies i

COMM 3353:Communication Web Technologies I

  • Chapter 3a:
    • Internet Radio

www.class.uh.edu/comm/classes/comm3353/ppt/_Pres3a.html

internet radio
Internet Radio
  • The Growth of Internet Radio
  • Internet Radio Versus Over-The-Air Radio
  • Real-Time Audio
  • Netcasting Networks
  • Cybercasting Radio Stations
the growth of internet radio
The Growth of Internet Radio
  • The Internet provides the ability to own, program, and operate a radio station with relative ease
  • December 1994: KU Student-run radio first to go live on the Internet
  • September 5, 1995: Birth of “Live” Internet Audio with sports netcast
  • September 9, 1995: Dallas KLIF-AM first commercial station on the Internet full-time.
the growth of internet radio continued
The Growth ofInternet Radio, continued…
  • Rise of Internet Radio and Over-the-Air Radio
    • Similar development
      • HAM (amateur radio operators) turned into commercial radio
      • Amateur netcasters paved the way for professional, commercial web radio
    • Internet Radio is becoming increasingly noticeable in the communication industry, although it has a long way to go
internet radio vs over the air radio
Internet Radio vs. Over-The-Air Radio
  • Over-Air radio use is slowly decreasing among internet users and IT professionals.
    • Amount of time spent listening to radio has decreased as a result of time spent surfing.
    • Reciprocity rather than accommodation.
      • Now a general move toward accommodation.
      • With this move comes the demand for faster, more reliable service
internet radio vs over the air radio continued
Internet Radio vs. Over-The-Air Radio, continued…
  • Benefits of Internet Radio
    • Potentially better than Over-Air Radio
      • Web audio files can be accessed at any time, regardless of when first aired
      • Netcasts can be listened to anywhere in the world, regardless of origin
      • Netcasts include visual and sound stimulus as well as printed text.
      • Allows Multitasking
internet radio vs over the air radio continued7
Internet Radio vs. Over-The-Air Radio, continued…
  • Challenges of Internet Radio
    • Sound Quality
        • Based on connectivity
      • Biggest problem with Internet Radio
      • Main reason adoption is slow
    • Download delay
      • A 15 min. audio program can take 1-2 hours to download
        • Although it’s getting increasingly quicker
internet radio vs over the air radio continued8
Internet Radio vs. Over-The-Air Radio, continued…
  • Challenges of Internet Radio, Cont.
    • Limited number of server connections at any given time
      • Licensing (NT, Novel, etc.)
        • Per connection user rate
      • Software capability (NT Workstation)
        • Only allows 10 simultaneous connections
    • Lack of portability
      • No network connection on the beach
internet radio vs over the air radio continued9
Internet Radio vs. Over-The-Air Radio, continued…
  • Challenges of Internet Radio, Cont.
    • Portability, Cont.
      • Recent Dateline NBC interview with Bill Gates
        • Microsoft’s Billion Dollar R&D
        • Satellite technology beaming signal directly into cars and portable lap tops
      • The cars of the future will have console style computers, resembling a car radio, which will allow radio listing and email access, among other things.
real time audio
Real Time Audio
  • RealAudio
    • First application to bring real-time audio-on-demand over the internet.
    • Uses streaming technology to transmit live, real-time, continuous audio
      • STREAMING: technology that sends data through the net in a continuous flow so that information is displayed on a user’s computer before the entire file is downloaded
    • Since inception, many radio stations have adopted netcast technologies
real time audio continued
Real Time Audio, Continued…
  • RealAudio, Cont.
    • Does not require a great deal of computing expertise
    • Relatively inexpensive
    • With RealAudio, users (surfers) do not have to wait for big audio files to download, but rather get data seemingly instantaneously
real time audio continued12
Real Time Audio, Continued…
  • Internet Sound has actually been available since mid ‘80s.
    • Problematic due to packet-switching errors and long download times
  • RealAudio developed UDP (User Datagram Protocol)
    • Works just like (and in conjunction with) TCP/IP, except eliminates the “talking” between computers
real time audio continued13
Real Time Audio, Continued…
  • MPEG (Motion Pictures Experts Group)
    • Compresses graphic and sound files for internet transmission
      • Quicker because files are 1/10th normal size
      • Files must be decompressed once received by the user
  • RTSP (Real-Time Streaming Protocol)
    • Industry standard for streaming
    • RTSP is to Audio what HTML is to Text
      • In other words, RTSP is expected to be the primary audio programming protocol
real time audio continued14
Real Time Audio, Continued…
  • Multicasting
    • Technology that allows one audio file to be sent out to multiple receivers at any given time, rather than point-to-point file delivery
real time audio continued15
Real Time Audio, Continued…
  • How does Real-Time Audio Work?
    • Encoder vs. Player
      • RealAudio Encoder is used to send audio netcasts over the internet
      • RealAudio Player is the software technology used to receive encoded audio files and display them in a format understood by the user.
real time audio continued16
Real Time Audio, Continued…
  • RealAudio Encoder
    • Digitizes audio files for data packet and Real-Time player compatibility
    • Uses streaming and a buffer scheme to send digitized binary audio files
    • Generally associated with the server side of media streaming
real time audio continued17
Real Time Audio, Continued…
  • RealAudio Player
    • Decodes digitized audio sent from the server, initially created by RealAudio Encoder.
    • Greatly reduces waiting time for downloaded audio files
    • Generally associated with client side media steaming
netcasting networks
Netcasting Networks
  • Radio vs. Netcast Networks
    • Radio Networks
      • A Radio Network supplies radio stations with programming, news, commercials.
      • Ex. Westwood One, ABC, etc.
    • Netcast Networks
      • Derived from parent radio networks
      • Assist radio stations with developing online sites
      • Supplies netcast stations with current, breaking news, weather, sports, etc
      • Ex. ABC RadioNet, CBS Radio Networks Online
netcasting networks continued
Netcasting Networks, Continued…
  • Netcast Networks, Cont.
    • In addition to general support, some netcasts offer real-time cybercasts
      • Ex. ABC RadioNet’s OJ Simpson trial, Bill Clinton’s Presidential Radio Address
    • Netcast Networks use streaming technology to deliver real-time news, in some cases quicker than conventional media methods.
cybercasting radio stations
Cybercasting RadioStations
  • Broadcast Stations on the Web
    • Can excel online by providing the only radio link to locations unable to receive conventional radio signals.
    • Allow users to select any radio station, anywhere in the world
    • Could result in new arena for competition as Broadcast Stations attempt to attract new advertising markets
cybercasting radio stations continued
Cybercasting RadioStations, Continued…
  • Broadcast Stations on the Web, Cont.
    • Radio Web Sites compete with local radio stations and newsprint by providing consumer information and advertising
      • The larger the audience, the greater the market, the greater the advertising dollar share
    • Web Radio keeps the public informed
      • Used as a “tie-in” to promotional events by allowing a larger audience to “attend” than physically possible
cybercasting radio stations continued22
Cybercasting RadioStations, Continued…
  • Broadcast Stations on the Web, Cont.
    • Deciding what should be on a Radio Station\'s Web Site:
      • Internet Radio
      • Station profile
      • Photos of on-air personalities
      • Program schedule and Play List
      • Method of feedback (email)
      • Downloadable audio clips
      • DJ Biographies
cybercasting radio stations continued23
Cybercasting RadioStations, Continued…
  • Broadcast Stations on the Web, Cont.
    • Internet Radio makes a radio station “Global”
      • Netcasting allows for an unlimited audience
    • A radio station’s profit margin can be inflated by offering enhanced advertising packages to virtually any company in the world, provided the Web Radio Site is popular enough.
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