Distributed Seat Electronic Boxes for Aircraft In-Flight Entertainment
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Solution Overview
Problem
Narrow-body aircraft face challenges in providing in-flight entertainment due to limited space and weight constraints, as existing systems are often heavy and bulky, and passengers increasingly demand live broadcasts which are not adequately supported by current systems.
Innovation Solution
An in-flight entertainment system that includes an antenna for receiving digital satellite radio signals, an intermediate frequency down converter, and seat electronic boxes connected via wired or wireless cabling, allowing passengers to access live audio broadcasts and video channels with flexible configuration options for different seating classes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cable distribution networks with amplifiers and satellites are used, then live television broadcasts can be received, but the system becomes heavy and consumes valuable space on narrow-body aircraft
Solution Approach 1:
The patent extracts the satellite receiver functionality from the traditional cable distribution network and integrates it directly into individual seatback units. Each seat contains a miniaturized satellite receiver that can independently acquire and process satellite signals, eliminating the need for heavy centralized amplifiers and complex cable distribution infrastructure while maintaining live broadcast reception capability
Solution Approach 2:
The system divides the entertainment functionality into independent modular units at each seat. Each seatback contains its own satellite receiver, tuner, and processing capabilities, allowing the system to be scaled and configured flexibly without requiring a complete centralized distribution network, thereby reducing overall system weight
2Reliability
If full entertainment systems with satellite antennas and cable distribution networks are installed, then passengers can access live TV broadcasts, but space requirements increase significantly
Solution Approach 1:
The entertainment system is segmented into distributed independent units located at each seat rather than a centralized system. This segmentation allows the functionality to be delivered without requiring large centralized equipment spaces, as each seat operates autonomously with its own receiver and processing capabilities
Solution Approach 2:
The patent replaces the mechanical cable distribution network with wireless communication protocols. Seat units communicate with the aircraft's entertainment server and satellite signals wirelessly, eliminating the need for physical cable routing throughout the cabin and reducing space requirements for cable management infrastructure
3Ease of operation
If analog video signals are modulated on RF carriers and distributed through coaxial cables, then video and audio can be delivered to seats, but the system complexity and interference issues increase
Solution Approach 1:
The system transitions from analog RF modulation to digital signal processing. Seat units use digital tuners and processors that directly decode satellite signals without requiring analog RF carriers and modulators, simplifying the signal distribution architecture and reducing interference while maintaining ease of operation
Solution Approach 2:
The patent introduces digital signal processing as an intermediary between satellite reception and seat output. Digital signal conditioners and processors at each seat unit clean up and condition incoming signals, eliminating the need for complex analog RF carrier modulation and reducing system complexity while improving signal reliability
Data Source
AI summary
An aircraft in-flight entertainment (IFE) system includes an antenna for receiving digital satellite radio signals, and an intermediate frequency (IF) down converter is connected to the antenna for down converting the digital satellite radio signals. A plurality of seat electronic boxes (SEBs) are spaced throughout the aircraft. Each SEB includes at least one IF tuner in communications with the IF down converter.