Free and Open Multimedia

Xiph.org Logo

Ralph Giles

Xiph.org Foundation

Xiph.org Foundation

Xiph.org Foundation

We are a standards organization

Xiph.org Foundation

We are a standards organization

Xiph.org Standards

We are a standards organization

We exist because of patents

Why Free standards?

Xiph.org Standards

Layers of multimedia

Xiph Compression technology

Multimedia Formats

Other projects

Ogg Container

Ogg Container

Features and Bugs

Ogg Container

Features and Bugs

Simple Ogg stream

Simple Ogg stream

Simple Ogg stream

Multiplexed Ogg stream

Complex Ogg stream

Ogg Theora

Free video compression format

Ogg Theora

Free video format

Theora Overview

How does Theora work?

Theora Stream structure

theora stream illustration

Theora Info header

Theora Info header

Theora Comment header

Theora Table header

Theora Data packets

Theora Data packets

Theora Data packets

Theora Data packets

Current status

Current status

Future work

Experimental implementation by Timothy "Derf" Terriberry

In Summary