LAN Video All-Call System with Automatic Media Player State Reset
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Solution Overview
Problem
Existing video announcement systems in schools require cumbersome and time-consuming manual setup and reset processes for live video feeds, involving additional cabling and labor, which can lead to errors and interruptions.
Innovation Solution
A digital audio-visual system using a video camera, encoder, and decoder connected via a local area network, allowing for seamless live video feed distribution and automatic recording of media player states for effortless reset to pre-broadcast settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual switching and pausing of media players is used for live video feeds, then live video can be broadcast, but setup and reset time increases significantly
Solution Approach 1:
The system automatically pauses all media players before the live video feed starts and automatically resumes them after the feed ends. This preliminary automatic action eliminates the need for manual pausing and resuming, reducing setup and reset time while ensuring reliable live video broadcasting.
Solution Approach 2:
The system manages its own media player states automatically without human intervention. The controller monitors and controls media players, automatically pausing them when live video is activated and resuming them when deactivated, making the system self-sufficient and eliminating manual operational steps.
2Reliability
If additional coax cabling is installed for live video feeds, then live video can be delivered, but device complexity and installation effort increase
Solution Approach 1:
The system uses the existing coax infrastructure for multiple purposes: delivering both pre-recorded media content and live video feeds through the same cable network. The controller and media players are configured to handle both signal types, eliminating the need for separate cabling for live video while maintaining full functionality.
Solution Approach 2:
The system transmits live video signals through the existing coax cable infrastructure that was originally designed for pre-recorded media. By reusing the established cable pathways and connectors, the system copies the existing successful infrastructure for a new purpose without adding physical complexity.
3Ease of operation
If manual resetting of media players is performed after broadcasts, then media playback can resume, but errors and interruptions increase
Solution Approach 1:
The system automatically manages the complete lifecycle of media players including pausing during live video and resuming afterward. This self-managed process eliminates manual intervention that causes errors, ensuring reliable error-free operation while maintaining ease of use.
Solution Approach 2:
The controller continuously monitors the state of media players and automatically adjusts their operation based on live video feed status. This feedback loop ensures that media players are always in the correct state, preventing errors and interruptions that would occur with manual resetting.
Data Source
AI summary
A system and method using digital technologies to deliver a live-video-all-call bulletin over a local area network (LAN) in a facility, e.g., a school. The live video overrides all the facility's video-player devices by pausing them. Once the live-feed-video presentation is over, the system returns all of the facilities video players to the same state of operation each was in before the all-call presentation began.