Layered Broadcast Frame Multiplexing for Full Resource Utilization
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Solution Overview
Problem
Current broadcast signal transmission/reception systems lack the flexibility and performance to efficiently multiplex and demultiplex signals for multiple services in next-generation broadcasting systems, particularly in utilizing 100% of time and frequency resources.
Innovation Solution
A broadcast signal frame structure is developed that combines core and enhanced layer signals at different power levels, using a combiner, power normalizer, time interleaver, and frame builder to generate a multiplexed signal, which is then transmitted and received efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TDM or FDM is used for signal multiplexing, then signal transmission is supported, but flexibility and performance are limited and resources cannot be fully utilized
Solution Approach 1:
The patent segments the signal into multiple layers (core layer and enhanced layer) with different power levels, allowing independent processing and multiplexing of each layer. This segmentation enables more flexible resource allocation and improves overall system adaptability while fully utilizing available time and frequency resources.
Solution Approach 2:
The patent introduces a new dimension for signal multiplexing by combining signals at different power levels (amplitude dimension) rather than only in time (TDM) or frequency (FDM). This power-level dimension adds flexibility to the multiplexing scheme, enabling services to utilize 100% of available resources while maintaining adaptability.
2Productivity
If multiple services are multiplexed using traditional methods, then service support is provided, but time and frequency resources cannot be fully utilized
Solution Approach 1:
The patent merges multiple service signals into a unified multiplexed signal structure with different power levels. By combining core layer and enhanced layer signals in the amplitude domain, the system achieves full resource utilization while maintaining manageable complexity through a structured approach to signal integration.
3Productivity
If signals are combined at different power levels, then flexibility and performance are improved, but signal processing complexity increases
Solution Approach 1:
The patent applies local quality by assigning different power levels to different signal layers (core layer with higher power, enhanced layer with lower power). This localized power allocation optimizes the signal-to-noise ratio for each service type while maintaining overall system performance, and the structured approach keeps processing complexity manageable.
Data Source
AI summary
An apparatus and method for broadcast signal frame using layered division multiplexing are disclosed. An apparatus for generating broadcast signal frame according to an embodiment of the present invention includes a combiner configured to generate a multiplexed signal by combining a core layer signal and an enhanced layer signal at different power levels; a power normalizer configured to reduce the power of the multiplexed signal to a power level corresponding to the core layer signal; a time interleaver configured to generate a time-interleaved signal by performing interleaving that is applied to both the core layer signal and the enhanced layer signal; and a frame builder configured to generate a broadcast signal frame including a preamble for signaling time interleaver information shared by the core layer signal and the enhanced layer signal, using the time-interleaved signal.