Surveillance Video Post-Buffer Encryption After Stop Recording
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Solution Overview
Problem
Existing surveillance systems face challenges in determining when to stop recording surveillance data, leading to subjective manual decisions and unsuitable automatic decisions, which can result in important evidence being missed due to premature recording termination.
Innovation Solution
A method and system that continues recording for a defined period after a stop instruction is given, encrypting the additional frames with a post buffer encryption key, ensuring secure storage and access only under specific circumstances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If recording is stopped immediately when a stop instruction is received, then storage space is saved and recording efficiency is improved, but important evidence may be missed due to premature termination
Solution Approach 1:
The system performs preliminary action by continuing to record video frames for a predetermined time period after receiving a stop instruction, before actually stopping the recording. This ensures that any unexpected events occurring during the transition period are captured, thus preventing loss of important evidence while still allowing the system to respond promptly to stop commands.
2Adaptability or versatility
If manual decisions are used to determine when to stop recording, then flexibility and adaptability are improved, but subjective elements and inconsistency are introduced
Solution Approach 1:
The recording stop decision process is segmented into two distinct phases: a predetermined buffer period where recording continues automatically after a stop instruction, and then a final stop phase. This segmentation removes subjective judgment from the timing decision, providing consistent and objective handling of recording termination while maintaining the flexibility of manual stop commands.
3Measurement precision
If automatic decisions are used to stop recording, then consistency and objectivity are improved, but the system may not suit the current situation monitored
Solution Approach 1:
The predetermined time period acts as an intermediary buffer between the manual stop instruction and the actual recording termination. This intermediary period allows the system to automatically continue recording without subjective judgment, while still respecting the operator's intent to stop, thus combining the consistency of automatic decisions with the flexibility of manual control.
4Reliability
If additional frames are recorded after stop instruction, then forensic capabilities are enhanced, but data handling complexity and encryption requirements increase
Solution Approach 1:
The system performs preliminary encryption of the additional video frames during the buffer period, marking them with a specific identifier before the recording officially stops. This preliminary action ensures that the additional data is immediately recognized and handled appropriately, reducing later processing complexity while enhancing forensic capabilities by preserving potentially important evidence.
Data Source
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AI summary
A method in a video system for capturing a video sequence of image frames in a video capturing device, for processing the captured video sequence into a video stream and for recording the video stream. The video recording functionality of the video capturing device is controlled by means of a processing device of the video capturing device, receiving instructions. The method comprises receiving an instruction to start the recording of the video stream, receiving a subsequent instruction to stop the recording of the video stream, and ending the recording of the video stream. The receiving of the instruction to stop the recording of the video stream, results in identifying image frames of the video stream captured following the receipt of the instruction to stop recording, for encryption with a post buffer encryption key. The method then proceeds with encrypting the image frames identified for encryption using the post buffer encryption key and storing the image frames of the video stream encrypted with the post buffer encryption key.