Audio and Video Services on the Internet By: Bridget Jackowski and Chris Wood

Introduction  Video Conferencing  Internet Telephones  Webcasting  Peer-to-Peer Networking

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.

Videoconferencing (con’t)  How you obtain the data  Data is digitized and compressed  Data is served  Data is received, and decompressed  The data is played back.

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

Voice over Internet Protocol (VoIP)  Vonage from Motorola –DSL or cable modem –Virtual phone numbers –Low international rates

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

Webcasting (con’t)  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

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

Peer 2 Peer Network  Is an alternative to client/server computing  Different types of P2P networks –Gnutella –Grid Computing –Etc.  Allows sharing of spare computing power and storage of data among member nodes