Broadcast Signal Interleaving for Robust Multi-PLP Transmission
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and network flexibility, particularly in handling large amounts of data and ensuring reliable mobile reception.
Innovation Solution
The method involves encoding PLP data, performing time and frequency interleaving, and waveform modulation for broadcast signal transmission, with specific interleaving modes determined by FFT size, and includes FEC encoding and constellation mapping for error correction and efficient data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals transmit large amounts of video/audio data and additional services, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments broadcast data into multiple PLP (Physical Layer Pipe) data streams, each carrying different types of data (video, audio, additional services). This segmentation allows independent optimization of each data stream's transmission parameters, improving overall transmission efficiency while maintaining the ability to deliver large amounts of diverse data content.
2Quantity of substance
If digital broadcast signals include various types of additional data, then service functionality is improved, but transmission robustness deteriorates
Solution Approach 1:
The patent applies local quality by assigning different modulation and coding schemes to different PLP data streams based on their specific requirements. Critical data streams receive more robust error correction, while less critical streams use more efficient but less robust schemes, thereby maintaining transmission robustness for essential services while accommodating diverse additional data types.
3Manufacturing precision
If broadcast systems provide HD images and multi-channel audio, then service quality is improved, but network flexibility deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where PLP data streams can be dynamically configured, added, or removed based on service requirements and channel conditions. This dynamic approach allows the system to maintain high service quality for HD images and multi-channel audio while adapting to different network environments and mobile reception scenarios, thereby improving both service quality and network flexibility.
Data Source
AI summary
The present invention provides a method of transmitting broadcast signals. The method includes, encoding, by an encoder, PLP (Physical Layer Pipe) data; time interleaving, by a time interleaver, the encoded PLP data; frame mapping, by a framer, the time interleaved PLP data onto at least one signal frames; frequency interleaving, by a frequency interleaver, data in the at least one signal frames; and waveform modulating, by a waveform module, the frequency interleaved data in the at least one signal frame and transmitting, by the waveform module, broadcast signals having the modulated data, wherein the frequency interleaving is conducted according to an interleaving mode, wherein the interleaving mode is determined based on a FFT (Fast Fourier Transform) size.