Wireless Digital Data Delivery System for Aircraft Synchronization
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Solution Overview
Problem
Conventional digital data delivery systems in aircraft passenger rooms face challenges with asynchronous reproduction of video and audio signals due to the need for wired transmission channels, which increase weight and operational inefficiency, and wireless channels lack sufficient transmission capacity, making it undesirable to decode and retransmit signals for synchronized playback.
Innovation Solution
A digital data delivery system that generates and delivers synchronized video and audio data packets using a transmission server, including video and audio synchronization signals, allowing independent receivers to buffer and decode packets based on timing data, ensuring synchronized reproduction without the need for inter-receiver synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired transmission channels are used to deliver digital data between transmission facility and reception facilities, then transmission capacity and reliability are improved, but weight increases and operational efficiency decreases
Solution Approach 1:
The patent replaces the mechanical wired transmission system with a wireless transmission system. The transmission facility wirelessly transmits compressed digital video and audio data to reception facilities, eliminating the need for physical cables and connectors throughout the aircraft passenger room, thereby reducing weight while maintaining transmission reliability through digital error correction and protocol optimization.
Solution Approach 2:
The transmission facility creates compressed digital copies of video and audio content and transmits these copies wirelessly to multiple reception facilities simultaneously. This copying approach allows efficient distribution of content without requiring dedicated wired connections to each receiver, reducing overall system weight while maintaining reliable delivery through redundant transmission paths.
2Quantity of substance
If wired transmission channels are used throughout the aircraft passenger room, then transmission capacity is improved, but operational efficiency and adaptability decrease due to disconnection requirements when changing seat layouts
Solution Approach 1:
The patent implements a dynamic wireless transmission system where the transmission facility can adaptively adjust transmission parameters and target multiple moving reception facilities without physical reconfiguration. The wireless nature of the system allows seats and reception facilities to be freely repositioned within the aircraft cabin without requiring disconnection or reconfiguration of transmission channels, thereby providing both high data capacity and full operational flexibility.
3Weight of moving object
If wireless transmission channels are used, then weight reduction and operational efficiency improvement are achieved, but transmission capacity becomes insufficient for synchronized video and audio delivery to multiple receivers
Solution Approach 1:
The transmission facility employs advanced parameter optimization including variable compression ratios, adaptive bit rate allocation between video and audio streams, and dynamic modulation schemes to maximize wireless transmission capacity. By continuously adjusting transmission parameters based on channel conditions and receiver requirements, the system achieves sufficient data throughput for synchronized multi-receiver delivery while maintaining weight advantages of wireless architecture.
Solution Approach 2:
The transmission facility segments the content delivery into separate compressed video data streams and audio data streams, transmitting them independently but synchronously to multiple reception facilities. This segmentation allows optimized allocation of wireless bandwidth to different data types and enables parallel transmission to multiple receivers, effectively multiplying the usable transmission capacity while maintaining system weight benefits.
4Device complexity
If independent receivers decode video and audio data separately, then receiver independence and simplicity are improved, but synchronization between video and audio reproduction becomes difficult to maintain
Solution Approach 1:
The transmission facility performs preliminary synchronization encoding by embedding precise timing stamps and synchronization markers within the compressed video and audio data streams before transmission. Each reception facility receives pre-synchronized data packets with embedded timing information, allowing independent decoding while automatically maintaining synchronization through the pre-established temporal relationships encoded in the data structure itself.
Solution Approach 2:
The system implements feedback mechanisms where reception facilities monitor the arrival and decoding of video and audio packets, detecting any desynchronization. When drift is detected, receivers can request retransmission of specific packets or adjust their decoding timing based on feedback about synchronization status, thereby maintaining reliable sync between independently operating receivers without increasing receiver complexity.
Data Source
AI summary
A digital data delivery system that delivers video data of a content and audio data of the same content respectively to a first receiver and a second receiver, which are independent of each other, to reproduce the video data and the audio data at the first and second receivers in such a manner as to secure synchronous reproductions between the two data. The digital data delivery system includes a transmission server which delivers a video data packet and a video synchronization signal packet to the first receiver and an audio data packet and an audio synchronization signal packet which indicates a time on the same reference time axis as that of the video synchronization signal packet to the second receiver, the first receiver which adjusts a clock signal based on the video synchronization signal packet and reproduces the video data packet based on this clock signal, and the second receiver which adjusts a clock signal based on the audio synchronization signal packet and reproduces the audio data packet based on this clock signal.