Audio and Video Services on the Internet

1
Audio and Video Services on the Internet

• By Bridget Jackowski
• and
• Chris Wood

2
Introduction

• Video Conferencing
• Internet Telephones
• Webcasting
• Peer-to-Peer Networking

3
Videoconferencing

• Combination of audio, video, and data feeds.
• Enables live real-time interaction between two or
  more locations
• Used for conference rooms or classrooms
• Ideal for meetings between distance locations,
  consulting, panel discussions, courses, and
  interviews.

4
Videoconferencing (cont)

• How you obtain the data
• Data is digitized and compressed
• Data is served
• Data is received, and decompressed
• The data is played back.

5
Internet Telephones

• Two parties could make free phone calls via
  internet, if they were both on together.
• Some problems continuous beeps instead of a ring
  and long pauses between each response.
• Now there is the Internet Protocol Telephone.
• Clear voice, no beeps, and no pauses

6
Voice over Internet Protocol (VoIP)

• Vonage from Motorola
• DSL or cable modem
• Virtual phone numbers
• Low international rates

7
Webcasting

• Webcasting aka streaming
• Ideal for
• Course Lectures
• Guest Lectures
• Demonstration Materials
• Educational Materials
• Supplemental Materials for a Course

8
Webcasting (cont)

• 5 Steps
• The content is created
• Data is digitized and compressed
• Data is stored or immediately broadcast
• Data is transferred through the Internet
• Audience receives content via player software

9
Webcasting

• Streaming Video Content Comaprison, 2003
• Music 33
• News 28
• Sports 17
• Film 11
• Internet TV 6
• General Entertainment 5

10
Peer 2 Peer Network

• Is an alternative to client/server computing
• Different types of P2P networks
• Gnutella
• Grid Computing
• SETI_at_home
• Etc.
• Allows sharing of spare computing power and
  storage of data among member nodes