Broadcast Signal Transmission Data Pipe Segmentation
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Solution Overview
Problem
Current digital broadcast signal transmission technologies face challenges in data transmission efficiency, robustness, and flexibility, particularly in handling large amounts of data and providing mobile reception capabilities.
Innovation Solution
The method involves formatting input streams into Data Pipes (DPs), compressing headers, encoding, mapping onto constellations, time interleaving, and modulating using OFDM to transmit broadcast signals, allowing for multiple services to be multiplexed within the same RF signal bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If digital broadcast signals transmit large amounts of video/audio data and additional data, then service functionality is improved, but data transmission efficiency deteriorates
Solution Approach 1:
The patent segments the broadcast data stream into multiple Data Pipes (DPs), where each DP carries specific service components or services. This segmentation allows independent processing, encoding, and transmission of different data types, improving overall transmission efficiency by optimizing each pipe's content according to its specific requirements rather than treating all data uniformly.
Solution Approach 2:
The patent applies parameter changes by implementing header compression modes that dynamically adjust header sizes based on data characteristics. The header compression ratio is modified according to the service type and data requirements, reducing overhead for certain data streams while maintaining necessary information for others, thereby improving overall transmission efficiency.
2Productivity
If multiple services are transmitted through the same RF signal bandwidth, then spectrum utilization is improved, but service quality control becomes more difficult
Solution Approach 1:
The patent divides the broadcast signal into multiple Data Pipes, with each DP dedicated to carrying specific service or service component data. This segmentation enables independent QoS control for each pipe, allowing the system to maintain reliable quality control for multiple services transmitted simultaneously over the same RF bandwidth by managing each pipe's parameters separately.
Solution Approach 2:
The patent implements dynamic QoS control by allowing different Data Pipes to have adjustable transmission parameters such as coding rate, modulation scheme, and header compression level. These parameters can be dynamically modified based on service requirements, enabling the system to adaptively control service quality for each pipe while maintaining efficient spectrum utilization.
3Productivity
If header compression is applied to data packets, then data transmission efficiency is improved, but data packet structure complexity increases
Solution Approach 1:
The patent modifies the header structure parameters by implementing compression modes that reduce header size based on data characteristics. The header compression dynamically adjusts parameter representation (e.g., using differential encoding, removing redundant fields) to achieve higher transmission efficiency while managing structural complexity through systematic parameter transformation rather than arbitrary restructuring.
4Reliability
If data is classified by components and transmitted as separate data pipes, then service quality control is improved, but system complexity increases
Solution Approach 1:
The patent segments the broadcast system into multiple Data Pipes, with each pipe handling specific service components. This segmentation improves QoS control by allowing independent parameter adjustment for each pipe while managing system complexity through modular architecture where each pipe can be processed independently, reducing the need for complex interdependencies.
Solution Approach 2:
The patent implements a universal Data Pipe framework that can handle multiple service types through a common structure and processing mechanism. This multi-functionality approach allows the same basic pipe infrastructure to serve different services with varying QoS requirements, reducing overall system complexity compared to having separate dedicated systems for each service type.
Data Source
AI summary
A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals comprises an input formatter to format at least one input stream to output DP (Data Pipe) data corresponding to each of a plurality of DPs, wherein the each of a plurality of DPs carries at least one service or at least one service component, an encoder to encode the DP data, a mapper to map the encoded DP data onto constellations, a time interleaver to time interleave the mapped DP data, a frame builder to build at least one signal frame including the time interleaved DP data, a modulator to modulate data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter to transmit the broadcast signals having the modulated data.