Magnetic Recording Components Segmentation for Density Stability
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Solution Overview
Problem
Current magnetic recording and reproducing devices face challenges in achieving high-density recording stability due to issues with magnetization state continuity and intermediate noise, which affect signal reproduction and recording density.
Innovation Solution
The magnetic recording and reproducing device employs a configuration where the number of continuous magnetic recording components with the same state is limited to 4 or less, and the magnetization states are controlled to reduce intermediate noise by alternating between specific magnetization states in adjacent sub-tracks, allowing for stable recording and reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of continuous magnetic recording components with the same state is increased to improve recording density, then recording capacity increases, but intermediate noise increases and recording stability deteriorates
Solution Approach 1:
The magnetic recording components are segmented into groups of 4 or fewer continuous components with the same state. This segmentation prevents excessive intermediate noise while maintaining high recording density by optimizing the distribution pattern of magnetization states across the recording medium.
Solution Approach 2:
The patent changes the parameter of continuous component count from an unrestricted value to a specific range (4 or fewer). This parameter optimization resolves the contradiction by finding the optimal point where recording density is maximized while intermediate noise and stability issues are controlled.
2Reliability
If magnetization states are alternated in adjacent sub-tracks to reduce intermediate noise, then recording stability improves, but recording complexity increases
Solution Approach 1:
The magnetization states are alternated in a periodic pattern across adjacent sub-tracks. This periodic alternation reduces intermediate noise and improves recording stability while maintaining a manageable control complexity through the regular, repeating nature of the pattern.
3Quantity of substance
If ternary information is recorded to increase data capacity, then recording density improves, but signal reproduction accuracy deteriorates due to intermediate noise
Solution Approach 1:
The recording components are segmented into small groups (4 or fewer continuous components with the same state) to encode ternary information. This segmentation maintains signal reproduction accuracy by limiting intermediate noise while preserving the enhanced data capacity of ternary recording.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances recording density and stability by minimizing intermediate noise and ensuring precise signal reproduction, even when recording ternary information.
Implementation Method 1
A first magnetic recording component and a second magnetic recording component included in the one recording symbol have first and second magnetizations, respectively
Implementation Method 2
The reproducing unit reproduces the information recorded in the first sub-track and the second sub-track while opposing the first sub-track, the second sub-track, and a boundary between the first sub-track and the second sub-track
Data Source
AI summary
According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a recording unit, and a reproducing unit. The magnetic recording medium includes a first track including first and second sub-tracks extending in a first direction. The second sub-track is arranged with the first sub-track in a second direction intersecting the first direction. The recording unit records information in the first and second sub-tracks. The reproducing unit reproduces the information recorded in the first and second sub-tracks while opposing the first, second sub-tracks, and a boundary between the first and second sub-tracks. The first sub-track includes first magnetic recording components including first and second components. The second sub-track includes second magnetic recording components including third and fourth components. A first recording symbol is formed of the first and third components. A second recording symbol is formed of the second and fourth components.