WWW: Beyond the Basics

11. Real-time Audio and Video

by Shaohong Qu

ABSTRACT

Audio and video signals are analog signals by nature. Those signals must be converted to digital form before they are transmitted through computer networks. Transfer of real-time audio and video information requires a large network bandwidth and low data latency. In this chapter we provide an inside look of the theories of audio and video digitalization and real-time network technology. We also introduce two real-time applications: telephony and videoconferencing.

CHAPTER CONTENT

  1. Introduction
    1. Real-time Audio and Video in the World Wide Web
    2. Chapter Guide
  2. Digital Audio
    1. Sampling
    2. Quantization
    3. Other Encoding Methods
  3. Digital Video
    1. Moving Picture
    2. Color Encoding
    3. Compression Formats
  4. Network for Real-time Applications
    1. Real-time Network Requirement
    2. Real-time Networks
  5. Applications
    1. Telephony
    2. Videoconferencing
References

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Last modified: Sat Dec 7 1996