Broadcast Signal Transmission Using PLP Segmentation and OFDM

The invention segments the broadcast data into multiple PLPs (Physical Layer Pipes) with different priorities and service types. Each PLP can be independently encoded and transmitted, allowing efficient resource allocation. The segmentation enables different data streams (video, audio, additional services) to be organized into separate logical channels that can be optimized individually, resolving the contradiction between transmitting large data volumes and maintaining transmission efficiency.

The invention applies local quality by assigning different error correction codes and modulation schemes to different PLPs based on their specific service requirements. Critical services like audio and video get stronger error protection, while less critical additional services use lighter protection. This localized optimization maintains robustness for essential services while enabling diverse service capabilities, resolving the contradiction between service versatility and network robustness.

The invention implements dynamics by enabling the receiver to dynamically select and decode only the PLPs relevant to the desired service. Mobile reception equipment can flexibly adapt to different service types (mobile TV, data services, audio) by selectively processing appropriate PLPs. This dynamic selection capability provides reception flexibility while maintaining transmission efficiency, as the system does not need to transmit redundant data for all possible service types simultaneously.