Train Screen Transmission With Operable Remote Control Over Low Data Size
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Solution Overview
Problem
Conventional techniques for transmitting screen information from a train to the ground side struggle with data size limitations, making it difficult to transmit operable image data due to the inability to enable operation of buttons and other components on the ground-side display device.
Innovation Solution
A train control and management system that includes a communication unit, controller, and display unit, which generates second image data by adding identification information to first image data of operational components, allowing for the transmission of operable screen information over a compressed data size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If screen information item is transmitted in compressed form, then data size is reduced, but operational capability is lost
Solution Approach 1:
The screen information is segmented into two distinct data types: first image data for display content and second image data for operational components. This segmentation allows the system to transmit only the necessary operational information (button positions, IDs, and states) separately from the full screen content, resolving the contradiction between compression and operability.
Solution Approach 2:
An image processing unit acts as an intermediary between the display unit and communication unit. This intermediary extracts and generates second image data containing only operational component information, enabling the transmission of compressed data while preserving operational capability through the mediating processing step.
2Ease of operation
If full screen information is transmitted, then operational capability is maintained, but data size increases
Solution Approach 1:
The system extracts only the essential operational information (identification information of operational components, their positions, and states) from the complete screen information. This extraction process removes unnecessary data while retaining operational capability, directly addressing the contradiction between maintaining operability and reducing data size.
Solution Approach 2:
Instead of transmitting complete screen information, the system transmits only the partial information necessary for operation (second image data). This partial action approach sends sufficient data for operational purposes without the excess of full screen transmission, resolving the data size versus operational capability contradiction.
Data Source
AI summary
Included are a CN serving as a communication unit that receives a screen information item request from an OCC serving as a ground-based central command device, a CCU serving as a controller, and a VDU serving as a display unit. The VDU includes an onboard image display unit that displays the screen information item on the basis of the control performed by the CCU, an image processor that generates first image data by putting the screen information item displayed by the onboard image display unit into image form, and an information adder that generates second image data by adding an identification information item on an operational component to the first image data when an image represented by the first image data includes an image of the operational component that receives an operation from a user. The CN transmits the second image data to the OCC.