Broadcast Signal Framing With L1 Preamble and PLP Error Correction
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Solution Overview
Problem
Current digital broadcasting technologies face challenges in improving data transmission efficiency and error correction capabilities, especially with the increasing demand for high-definition video and audio signals and the need to transmit multiple broadcasting channels efficiently.
Innovation Solution
The method involves generating layer-1 information, applying error correction encoding schemes such as LDPC with shortening and puncturing, interleaving, and modulating the signal for transmission via multiple RF channels, while the receiving apparatus demodulates, deinterleaves, and decodes the signal to extract physical layer pipes using inverse error correction schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction encoding schemes with shortening and puncturing are applied to layer-1 information, then error correction capability is improved, but data transmission efficiency deteriorates due to increased overhead
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the error correction encoding rate and puncturing pattern based on channel conditions and service requirements. By varying the code rate and puncturing proportion, the system optimizes the balance between error correction capability and data transmission efficiency, allowing adaptive adjustment rather than fixed overhead
Solution Approach 2:
The patent segments the layer-1 information into multiple code blocks and applies different error correction encoding schemes to different segments. This allows selective application of strong error correction to critical information while using lighter encoding for less critical data, improving overall transmission efficiency while maintaining necessary reliability
2Quantity of substance
If multiple RF channels are used for transmitting broadcasting signals, then data transmission capacity is improved, but system complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing a unified signal frame structure that can be transmitted across multiple RF channels simultaneously. The same encoding and modulation schemes are applied across channels, allowing the system to scale capacity by adding channels without proportionally increasing complexity, as each channel uses the same standardized processing pipeline
Solution Approach 2:
The patent merges the transmission of multiple broadcasting services into a single multiplexed signal frame that can be distributed across multiple RF channels. By combining multiple services into unified frames with shared overhead structures, the system achieves high data transmission capacity while reducing per-channel complexity through shared processing
3Productivity
If layer-1 information is arranged in the preamble of signal frame, then signal synchronization and decoding efficiency are improved, but available space for other data is reduced
Solution Approach 1:
The patent applies preliminary action by placing essential layer-1 information in the preamble before the main data payload. This allows the receiver to perform synchronization and basic decoding parameters extraction before processing the bulk data, improving decoding efficiency. The preamble contains only critical information needed for initial setup, minimizing the space consumption
Data Source
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AI summary
There is disclosed a method of transmitting a broadcasting signal, the method comprising encoding layer-1, L1, signaling data; bit-interleaving bits of the encoded L1 signaling data; encoding Physical Layer Pipe, PLP, data delivering service data; building a signal frame including the encoded PLP data and a preamble including the bit-interleaved L1 signaling data; and transmitting the signal frame. An inter-related method of receiving a broadcast signal, as well as inter-related apparatuses are also described.