Dual-Layer Disc Guard Track Zone and ECC Interleaving
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Solution Overview
Problem
Conventional recordable DVD-R discs face issues with limited capacity due to the fixed sizes of the power calibration area (PCA) and recording management area (RMA), leading to premature exhaustion of these areas, and suffer from interlayer crosstalk in dual-layer storage media, which affects both recording and playback.
Innovation Solution
The proposed solution involves an information recording method for a dual-layer storage medium with a guard track zone in the data lead-out area, interleaving small ECC blocks, and using an organic dye recording material with a higher reflection factor in the 'Low to High' (L-H) recording film to improve recording sensitivity and reliability, while maintaining optimal recording power for high-density recording without substrate shape change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If test recording is performed in the PCA area to adjust recording waveform parameters, then recording reliability is improved, but the remaining capacity of the PCA area decreases, causing recording operations to stop prematurely
Solution Approach 1:
The patent segments the data area into multiple zones and performs test recordings in different zones at different stages of the recording process, rather than repeatedly using the same PCA area. This distributes the test recording burden across multiple locations, preserving the PCA area capacity while maintaining recording reliability through periodic waveform adjustments.
2Reliability
If the capacity of the RMA area or PCA area is reserved in advance to prevent exhaustion, then the reliability of recording operations is improved, but the capacity of the data area reduces
Solution Approach 1:
The patent implements dynamic waveform adjustment by periodically performing test recordings at different stages of data area filling, rather than using fixed reserved areas. The frequency and location of test recordings adapt based on the recording progress, allowing maximum utilization of the data area while maintaining reliability through timely waveform recalibration.
3Quantity of substance
If high-density recording is performed on dual-layer storage media, then storage capacity is improved, but interlayer crosstalk increases, affecting recording and playback quality
Solution Approach 1:
The patent applies different recording strategies to different layers and zones of the dual-layer disc. By adjusting recording parameters locally for each layer and performing targeted test recordings in specific zones, the system optimizes recording quality for each layer independently, minimizing interlayer crosstalk while maintaining high storage capacity.
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 enables high-density recording with improved sensitivity and reliability, reducing the need for frequent test recordings, maintaining capacity, and minimizing interlayer crosstalk, thus enhancing the overall performance of dual-layer storage media.
Implementation Method 1
an organic dye recording material with a higher reflection factor in the 'Low to High' (L-H) recording film to improve recording sensitivity and reliability
Data Source
AI summary
According to one embodiment, an information storage medium in which layer 0 and layer 1 are arranged from a read surface, a system lead-in area, data lead-in area, data area, and middle area are arranged from an inner circumference of the layer 0, and a system lead-out area, data lead-out area, data area, and middle area are arranged from an inner circumference of the layer 1. A guard track zone is arranged on a side of the data area in the data lead-out area, and a reference code zone, R physical format information zone, recording management zone, and drive test zone are arranged in the data lead-in area of the layer 0 and padding of the guard track zone of the data lead-out area is performed after padding of the drive test zone of data lead-in area and recording of the recording management zone.