Lock Setting Function for Video Audio File Overwrite Protection
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Solution Overview
Problem
Conventional video and audio recording and/or reproducing apparatuses risk losing important files due to insufficient storage capacity, as they automatically overwrite files in a sequential order without the option to protect critical files from deletion.
Innovation Solution
A video and audio recording and/or reproducing apparatus with a lock setting function that allows users to select and lock specific files to prevent them from being overwritten, using a main controller to manage storage and display a lock setting list screen, ensuring that locked files are not deleted even when storage capacity is low, and overwriting other files while skipping the locked areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the overwrite function is set to automatically overwrite files in sequential order, then the storage device can continue recording new files when storage capacity is insufficient, but important files may be lost due to automatic overwriting
Solution Approach 1:
The system performs preliminary identification and marking of important files before the overwriting process occurs. By setting a lock status on specific files in advance, the system prepares protection measures before storage capacity issues arise, preventing important files from being overwritten while maintaining automatic overwrite functionality for non-locked files.
Solution Approach 2:
The system applies different protection qualities to different files based on their importance. Instead of uniformly protecting or allowing overwriting of all files, the lock status creates local differentiation where selected important files receive protection while other files remain subject to automatic overwriting, enabling selective preservation based on file significance.
2Reliability
If the system provides a lock setting function to protect important files, then file safety is improved, but the device complexity increases due to additional lock management mechanisms
Solution Approach 1:
The lock management functionality is extracted as a separate, independent mechanism from the core recording and overwriting processes. The lock status is stored as distinct metadata information separate from the file data itself, allowing the protection mechanism to be managed independently through simple status flags rather than complex integrated control systems.
Solution Approach 2:
The system provides self-service lock management through automated identification and locking of important files. Once files are marked as important, the lock status is automatically maintained and enforced by the recording apparatus without requiring continuous user intervention or complex manual management procedures, simplifying the user interaction while maintaining protection.
Data Source
AI summary
A video and audio recording and/or reproducing apparatus having a lock setting function and a control method thereof. The video and audio recording and/or reproducing apparatus records a video and audio file received from the outside on a storage device, and reproduces and outputs the recorded video and audio file to an external display. The apparatus includes an external input device receiving a function selection signal of the video and audio recording and/or reproducing apparatus, and a main controller displaying a lock setting list screen on the external display upon receiving a signal for setting a lock from the external input device. The main controller sets a lock setting information to prevent an area, on which a video and audio file selected from video and audio files listed on the lock setting list screen is recorded, from being overwritten by a video and audio file to be recorded.