Event-Triggered Camera Recording for Low-Power Video Surveillance
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Solution Overview
Problem
Video surveillance devices using battery-powered cameras face high power consumption challenges, particularly with continuous video recording (CVR), necessitating a balance between performance and power consumption.
Innovation Solution
Implementing an event-based video recording (EVR) system that activates the camera module upon event detection, transmitting an alarm message and video, and continuing recording without additional messages, while switching between active and sleep states to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous video recording (CVR) is implemented, then comprehensive video surveillance data is provided, but power consumption becomes daunting
Solution Approach 1:
The system switches from continuous recording to periodic event-based recording. The camera module activates only when events are detected, creating periodic action patterns that dramatically reduce power consumption while maintaining surveillance effectiveness through selective recording of important moments.
Solution Approach 2:
The patent extracts and isolates only the essential recording function triggered by events, separating it from continuous recording. By taking out the camera module's activation from continuous operation and linking it specifically to event detection, the system achieves comprehensive surveillance data with minimal power consumption.
2Loss of information
If alarm messages are transmitted for every detected event, then complete event notification is provided, but unnecessary data transmission increases power consumption
Solution Approach 1:
The system implements feedback mechanisms where the camera module's state (active/sleep) influences transmission behavior. After an alarm message is sent, subsequent events during the same active period do not trigger additional messages, creating a feedback loop that reduces unnecessary transmissions while maintaining complete event notification through continuous video capture.
Solution Approach 2:
The patent applies partial action by sending alarm messages only for the first event in each active period rather than for every event. This partial notification approach is sufficient because the continuous video capture during the active period provides complete event documentation, making additional alarm messages excessive and unnecessary.
3Reliability
If the camera module remains activated continuously, then video capture is always available, but power consumption increases
Solution Approach 1:
The camera module transitions from a static continuous operation state to a dynamic state that adapts based on event detection. The module switches between active and sleep states dynamically, being activated only when events occur and returning to sleep mode when no events are detected, thereby maintaining video capture availability while significantly reducing power consumption.
Solution Approach 2:
The system changes the operational parameter of the camera module from continuous activation to event-triggered activation. By changing the activation parameter from a constant state to a conditional state based on event detection, the system maintains reliable video capture when needed while minimizing power consumption during normal operation.
Data Source
AI summary
An electronic device, a cloud device, a client device, and operating methods therefor are provided. A method of operating an electronic device including a camera module configured to capture a video and having a first state, in which the camera module is activated to capture a video, includes: in response to that an event in one or more types of events is detected, in a case where the electronic device is in the first state, transmitting an alarm message indicating that the event is detected, and transmitting, as an alarm video, a video captured by the camera module after the event is detected; and after the alarm message is transmitted, in response to that an event in the one or more types of events is detected, not transmitting an alarm message indicating that the event is detected but continuing transmitting the video captured by the camera module.