Multi-Turbo Stream Broadcasting for Multipath Reception
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Solution Overview
Problem
The existing ATSC VSB terrestrial digital broadcasting system in the U.S.A. experiences poor reception performance in multipath channels, particularly due to the inability to effectively improve reception with dual stream transmission, and lacks adaptability for enhanced broadcasting models using multi-turbo streams.
Innovation Solution
A digital broadcasting transmission and reception system that processes and transmits multiple turbo streams by detecting, encoding, and trellis-encoding them within a dual transport stream, allowing for parallel decoding and demultiplexing to enhance reception performance in diverse environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual stream transmission is used to improve reception performance, then reception robustness is improved, but the system lacks adaptability for enhanced broadcasting models using multi-turbo streams
Solution Approach 1:
The transmitter is designed with a configurable turbo stream processing capability that can handle both single and multiple turbo streams. The system universally supports different broadcasting models by enabling or disabling turbo stream processing, allowing it to function as either a standard dual-stream system or an enhanced multi-turbo stream system depending on the broadcasting mode required.
Solution Approach 2:
The system dynamically adapts its processing capability based on the broadcasting mode. The transmitter can switch between processing a single turbo stream or multiple turbo streams depending on the service type and channel conditions, providing dynamic versatility without requiring separate fixed systems for different broadcasting models.
2Reliability
If multiple turbo streams are processed to enhance reception in diverse environments, then reception performance is improved, but system complexity increases
Solution Approach 1:
The turbo stream processing is segmented into separate processing blocks, each capable of handling individual turbo streams. When multiple turbo streams are required, additional processing blocks are activated; when single stream suffices, fewer blocks are used. This modular segmentation allows the system to scale complexity according to actual needs rather than requiring full complexity always.
Solution Approach 2:
The system changes its operational parameters based on channel conditions and service requirements. By adjusting the number of active turbo streams and their respective processing configurations, the system optimizes reception performance for diverse environments while controlling complexity by only activating the necessary number of processing elements for each specific situation.
Data Source
AI summary
A digital broadcasting transmission system processes dual transport stream (TS) including multi turbo streams. The digital broadcasting transmission system includes a turbo processor to detect a turbo stream from a dual transport stream (TS) which includes a multiplexed normal stream and a turbo stream, encoding the detected turbo stream and stuffing the encoded turbo stream into the dual TS; and a transmitter to trellis-encode the processed dual TS, and to output the resultant stream, wherein the turbo processor encodes the turbo stream using a plurality of turbo processors. Accordingly, a plurality of turbo streams may be processed in parallel.