Table of Contents:

Definition and Overview

1. Why DTM?

2. DTM Basics: Circuit Switching vs. Packet Switching

3. The DTM Advantage: Combining Synchronous and Asynchronous Media-Access Schemes

4. Principles of DTM: Frames and Slots

5. DTM Services

6. The DTM Solution for Enterprise Access

7. The DTM Solution for Residential and Small-Office Access

8. The DTM Solution for Content Providers

9. DTM Solution for Video-Production Networks

10. Application Server (AS) and Services

11. The Future of DTM

Self-Test

Glossary

PDF of this tutorial

For video-producing companies such as TV producers, film producers, and commercial movie producers, a DTM network can provide a distributed real-time video network. By transporting real-time video streams in the International Telecommunications Union (ITU)–R BT 601 format, different production units can be connected in a video-production network. The possibility of establishing an ITU–R BT 601 connection on demand provides an opportunity for new services. For example, TV producers may accomplish the following:

• set up film banks and sell raw film material to other TV producers
• do real-time editing from different locations

Figure 10. Distributed Video-Production Network

Benefits of the use of DTM as a video-production network include the following:

• DTM enables 270 Mbps ITU–R BT 601 channels to be switched on demand.
• A real-time video-production network enables film production companies to edit films remotely and, hence, reduce production costs.
• A public real-time video-production network gives a new perspective on film production, leading to new services and markets.