Portable Audio Incident Detection for Public Transport Blind Spots
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Solution Overview
Problem
Existing video surveillance systems in public transport vehicles are limited by blind spots and obstructed views, leading to incomplete incident detection, while existing audio surveillance systems are constrained by fixed microphone positioning and limited coverage.
Innovation Solution
A method and system utilizing portable and fixed audio capture devices, integrated with intelligent computing units, including neural networks, for real-time analysis of audio streams to enhance incident detection in public transport vehicles, particularly in railway vehicles, with portable devices worn by passengers and fixed devices installed in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If fixed microphones are used in video surveillance devices, then the positioning is stable and easy to install, but the coverage is limited by blind spots and obstructed views
Solution Approach 1:
The patent transforms the static audio surveillance system into a dynamic one by enabling audio capture devices to move freely within the vehicle. Portable audio devices can be repositioned based on incident locations, crowd density, or coverage gaps, allowing the system to adapt its coverage area dynamically rather than being constrained by fixed microphone positions.
Solution Approach 2:
The patent divides the audio surveillance function into independent portable audio capture devices that can operate separately. Instead of relying on a single fixed microphone system, multiple portable devices can be distributed throughout the vehicle, each covering specific zones, thereby segmenting the overall surveillance coverage into manageable, movable units.
2Adaptability or versatility
If portable devices are used for audio capture, then the positioning flexibility and coverage are improved, but the device complexity and data management become more challenging
Solution Approach 1:
The patent merges multiple portable audio capture devices into a unified surveillance system through a central server that aggregates audio streams, metadata, and incident detections. This consolidation simplifies data management by providing a single point of control for receiving, processing, and analyzing audio data from all portable devices, thereby reducing the complexity burden despite the increased number of individual capture points.
Solution Approach 2:
The patent introduces a communication gateway and central server as intermediary components between portable audio devices and the analysis system. These intermediaries handle device registration, authentication, audio stream transmission, and coordination, thereby shielding the complexity of managing multiple portable devices from the end users and simplifying the overall system architecture.
3Speed
If real-time analysis is performed, then the incident detection speed is improved, but the energy consumption and processing requirements increase
Solution Approach 1:
The patent implements partial real-time analysis by performing continuous audio stream analysis for basic incident detection while using more intensive processing only when incidents are detected or suspected. The intelligent computing units analyze audio data in real-time for anomalies, and only then trigger full incident verification and response protocols, thereby reducing overall energy consumption while maintaining rapid detection capabilities for critical events.
Data Source
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AI summary
The invention relates to a method (100) for detecting an incident in a public transport vehicle, in particular in a railway vehicle, comprising at least one iteration of a phase (102), referred to as the detection phase, comprising at least the following steps: - capture (104) in said public transport vehicle, and in particular in a passenger area of said public transport vehicle, of at least one audio stream, referred to as the first audio stream, by at least one device, referred to as the portable device, said device comprising at least one audio capture means and being intended to be worn by a person moving within said public transport vehicle, - transmission (106) of said at least one captured first audio stream to at least one device, referred to as the analysis device, separate from said at least one portable device and comprising at least one intelligent computing unit, and - analysis (108), by said at least one intelligent computing unit,said at least one initial audio stream for detecting an incident. It also relates to an incident detection system for implementing a method according to the invention, as well as a public transport vehicle equipped with such an incident detection system.