Broadcast Signal Frame Generation Using Layered Division Multiplexing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current broadcast signal transmission systems lack efficient methods for layered division multiplexing using core and enhanced layer physical layer pipes, requiring proper signaling parameters to optimize performance and reduce implementation burdens in receivers.
Innovation Solution
An apparatus and method for generating broadcast signal frames that combine core and enhanced layer signals, perform power normalization, and apply time interleaving, while including signaling information for Physical Layer Pipes (PLPs) to facilitate efficient layered division multiplexing and receiver restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If layered division multiplexing is implemented using core and enhanced layer physical layer pipes, then transmission efficiency and flexibility are improved, but receiver implementation complexity increases
Solution Approach 1:
The transmission system is segmented into core layer and enhanced layer physical layer pipes, allowing independent processing and optimization of each layer. The core layer handles basic service requirements while the enhanced layer provides additional functionality, enabling receivers to selectively process only the necessary layers based on service requirements.
Solution Approach 2:
The system utilizes injection level information as a key parameter to control the multiplexing process. By adjusting the injection level parameter, the system can dynamically optimize the combination of core and enhanced layer signals, allowing receivers to simplify processing by focusing on parameter-based signal separation rather than complex structural analysis.
2Reliability
If proper signaling parameters are used for layered division multiplexing, then system performance is optimized, but signaling overhead increases
Solution Approach 1:
The signaling parameters are designed to serve multiple functions simultaneously. The injection level information not only controls the power normalization process but also enables receivers to identify and separate layered signals. This multi-functionality reduces the need for additional dedicated signaling parameters, thereby optimizing system performance without proportionally increasing signaling overhead.
3Manufacturing precision
If power normalization is applied to combine core and enhanced layer signals, then signal quality is improved, but processing complexity increases
Solution Approach 1:
Power normalization is performed as a preliminary action before signal combination. By pre-normalizing the power levels of core and enhanced layer signals, the system simplifies the subsequent combination process. Receivers can directly combine signals without requiring complex real-time power adjustment, thereby improving signal quality while reducing overall processing complexity.
Data Source
AI summary
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; a power normalizer configured to reduce 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 time-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 start position information and size information for each of Physical Layer Pipes (PLPs). In this case, the Physical Layer Pipes include a core layer physical layer pipe corresponding to the core layer signal and an enhanced layer physical layer pipe corresponding to the enhanced layer signal.