Multilayer Optical Disc Track Segmentation by Recording Purpose

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Multilayer optical discs face challenges in managing tracks effectively across multiple layers, leading to inefficient recording operations, reliability issues, and interference between layers, which affects the recording capacity and performance.

Innovation Solution

A recording management apparatus and method that sets multiple tracks by recording purpose within one layer, ensuring each track is completed within that layer to prevent straddling and optimize layer usage, using a control unit to perform track setting and closing track processing, allowing for efficient management of user data, management information, and mirror data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If tracks are allowed to straddle multiple layers in multilayer optical discs, then recording capacity is increased, but reliability and operation performance deteriorate due to interference between layers and difficulty in managing continuous recording areas

Engineering Contradiction:

Improverecording capacityVSAvoidreliability and operation performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent segments tracks so that each track is confined to a single layer rather than allowing tracks to straddle multiple layers. This segmentation approach divides the recording space into layer-specific continuous recording areas, eliminating interference between layers while maintaining effective capacity utilization through proper track management within each layer

Inventive Principle:

Principle #1Segmentation

2Reliability

If multiple tracks are set by recording purpose within one layer, then operation performance and reliability are improved, but recording capacity utilization may be reduced due to layer constraints

Engineering Contradiction:

Improveoperation performanceVSAvoidrecording capacity utilization

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent utilizes the layer dimension to accommodate multiple purpose-specific tracks within a single layer. By confining tracks to individual layers rather than allowing them to span across layers, the system can establish distinct continuous recording areas for different recording purposes (e.g., user data, management information, mirror data) within the same layer, thereby improving operational reliability while maintaining capacity utilization across the multilayer structure

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 the reliability and operation performance of multilayer recording media by ensuring each track is completed within a single layer, preventing interference and optimizing the use of each layer, thereby improving recording efficiency and capacity utilization.

Implementation Method 1

recording of information is performed by laser irradiation

Methodology Applied

Scientific EffectLaser irradiation: Laser

Data Source

PatentUS8873357B2Recording management apparatus, recording management method, and program

Publication Date: 2014.10.28 SONY GROUP CORP

AI summary

A recording management apparatus includes: a control unit configured to perform track setting processing arranged to set, by recording purpose, a plurality of tracks serving as continuous recording areas to one layer of a recording medium having a plurality of layers serving as recording layers where recording of information is performed by laser irradiation, and closing track processing arranged to set each track to a continuous recording completed state within one layer alone.