7. At a Glance: Comparing the Systems
To help summarize what we’ve learned, this table provides a simple comparison of the five digital satellite radio systems.
| System | Also Known As | Primary Goal | Key Differentiator for Learners |
| System A | Eureka 147 DAB | High-quality audio for all receiver types (fixed, mobile, portable) using satellite and terrestrial signals. | Excellent at handling reflected signals in cities to prevent sound breakup. |
| System B | VOA/JPL System | A flexible, power-efficient system designed for a wide variety of broadcasting scenarios. | Uses signal “diversity” (like two antennas) to overcome signal blockage. |
| System Ds | WorldSpace | Low-cost satellite audio and data broadcasting for portable and fixed receivers. | A pure satellite-focused system that uses the popular MP3 audio format. |
| System Dh | Hybrid WorldSpace | An extension of System Ds to provide robust mobile reception, especially in urban areas. | Combines satellite and ground signals for reliable reception in a car. |
| System E | ARIB | High-quality audio and multimedia data delivery to all receiver types. | Designed to broadcast multimedia (images, text) alongside audio. |