Recording Apparatus Priority-Based Storage Management
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Solution Overview
Problem
Conventional recording devices face storage capacity limitations, leading to failures in recording data due to insufficient free space, and require multiple hard disks for double recording, resulting in high costs and inefficiencies.
Innovation Solution
A recording apparatus that utilizes additional information to prioritize and manage data storage, allowing for deletion, compression, or relocation of data based on priority, ensuring consistent free space without relying on the order of recording, and switches or moves data between storage mediums as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data is recorded continuously into storage medium until full, then storage capacity is fully utilized, but recording of new data fails when free space is insufficient
Solution Approach 1:
The system performs preliminary actions by continuously monitoring free space and proactively deleting low-priority data before the storage medium becomes full. This prevents recording failures by ensuring sufficient free space is maintained in advance, rather than waiting until space is exhausted.
Solution Approach 2:
The system implements feedback mechanisms by continuously monitoring the free space status of the storage medium and using this information to dynamically adjust data deletion decisions. The control unit responds to space conditions by selectively removing low-priority recordings, maintaining a balance between storage utilization and recording reliability.
2Reliability
If multiple hard disks are used for double recording, then recording reliability is improved, but device cost and complexity increase
Solution Approach 1:
Instead of duplicating entire recordings across multiple disks, the system applies local quality differentiation by assigning priority levels to individual data items. Only low-priority data is selectively deleted when space is needed, while high-priority data is preserved. This achieves reliability through intelligent data management rather than physical redundancy.
Solution Approach 2:
The system implements a dynamic discard and recover mechanism where low-priority recordings are deleted to make space for new recordings, while high-priority recordings are preserved. This allows the system to maintain reliability for important recordings without requiring multiple storage devices, as the priority-based selection ensures critical data is always protected.
3Loss of information
If all recorded data is preserved without deletion, then data loss is prevented, but storage space is quickly exhausted
Solution Approach 1:
The system introduces dynamics by making the storage contents flexible rather than static. Data items are assigned priority levels that allow the system to dynamically adjust what is preserved and what can be deleted. This enables the storage medium to adapt to space requirements while preserving important data, creating a dynamic balance between data preservation and space availability.
Solution Approach 2:
The system changes the parameter of data importance by introducing priority levels (high, medium, low). This parameter change allows differential treatment of data items - low-priority data can be deleted to free space, while high-priority data is protected. This transforms the all-or-nothing data preservation approach into a nuanced system that preserves what matters most while managing space efficiently.
Data Source
AI summary
In a recording apparatus (camcorders, optical disc recorders, etc.), the operator presses down priority designating buttons for designating priorities when recording input image data. An additional information generating section records and holds, in a storage section, additional information indicating priorities of data to be recorded (e.g., “low”, “intermediate”, “high”, or “highest”) which are set, depending on what priority designating button has been pressed down. If recordable remaining space in the storage section detected by the remaining amount detecting section falls below a predetermined value before the start of or during recording of data, a control section overwrites regions in order of priority of data which is stored therein, the lowest first, with data which is about to be recorded or is being recorded, based on the additional information generated by the additional information generating section. Therefore, even if free space in the storage medium becomes small, a decisive moment can be recoded, for example.