Image Recording Device Dynamic Storage Allocation
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Solution Overview
Problem
Conventional image record apparatuses inefficiently utilize record medium space due to reserved pre-record data areas being larger than necessary, resulting in unused capacity when the actual image size is smaller than expected, leading to poor use efficiency.
Innovation Solution
An image record system that dynamically calculates and reserves storage space based on the maximum image size that can be transmitted by each camera, allowing for efficient use of the record medium by continuously overwriting pre-record images until an alarm occurs, thereby optimizing storage capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed reserved area for pre-record data is allocated based on maximum possible image size, then pre-record functionality is ensured, but record medium space is wasted when actual image sizes are smaller
Solution Approach 1:
The patent applies dynamics by making the reserved area size adjustable rather than fixed. The system dynamically determines the appropriate reserved area size based on the actual image size transmitted by the camera, allowing the allocation to adapt between minimum and maximum values. This resolves the contradiction by ensuring pre-record functionality is maintained while optimizing space utilization according to actual needs.
Solution Approach 2:
The patent changes the parameter of reserved area size from a static value to a variable that can be adjusted based on camera image size characteristics. By modifying this parameter dynamically, the system achieves both reliable pre-record operation and efficient use of record medium space, eliminating the waste that occurs with fixed maximum-based allocation.
2Reliability
If the reserved area is calculated using a conservative estimate of image size, then all pre-record scenarios are covered, but the use efficiency of the record medium deteriorates
Solution Approach 1:
The system dynamically adjusts the reserved area size based on actual camera image size measurements rather than using a static conservative estimate. This allows the system to maintain adequate pre-record coverage while significantly improving record medium utilization efficiency by matching the reserved area to actual needs.
Solution Approach 2:
The system performs self-measurement of image size characteristics and uses this information to automatically determine the appropriate reserved area size. This self-service approach eliminates the need for overly conservative external estimates, achieving both adequate coverage and high efficiency simultaneously.
3Ease of operation
If a fixed pre-record area size is allocated during formatting, then the system is simple to operate, but it cannot adapt to actual image size variations
Solution Approach 1:
The patent introduces dynamic adjustment capability that allows the system to adapt to different image sizes while maintaining ease of operation. The automatic determination of reserved area size based on actual camera output eliminates the need for manual configuration, preserving simplicity while achieving adaptability.
Solution Approach 2:
The system automatically measures and determines the appropriate reserved area size without requiring user input or complex configuration. This self-service mechanism maintains operational simplicity while enabling the system to adapt to various image size scenarios, resolving the contradiction between ease of use and adaptability.
Data Source
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AI summary
An object of the invention is to provide an image record apparatus and an image record method that can improve the use efficiency of a record medium for recording a video image from a camera. A NW control section (141) acquires the image quality and the resolution set in a camera (10) performing pre-record and calculates the maximum image size that can be transmitted by the camera (10), and a file system (142) calculates the number of images from the preset pre-record rate and pre-record time and reserves an area corresponding to the maximum image size of one pre-record image calculated by the NW control section (141) in an HDD (146). The NW control section (141) records a pre-record image transmitted from the camera (10) in the area reserved by the file system (142). When it records as many pre-record images as the number of pre-record images, it returns to the beginning of the area reserved by the file system (142) and continues recording a pre-record image is continued. When an alarm occurs while a pre-record image is recorded, the NW control section 141 determines that the pre-record image at the point in time is pre-record data.