Optical Disc Control Information Structure for Write Strategy Compatibility
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Solution Overview
Problem
Current recording technologies for high-density optical discs, such as Blu-ray, face challenges in achieving compatibility and efficient data recording at higher writing speeds, particularly in ensuring mutual compatibility between different recording media and strategies.
Innovation Solution
A method and data structure for recording disc control information that includes write strategy parameters for specific writing speeds and recording layers, allowing for the selection and application of optimal write strategies to ensure compatibility and efficient data recording across various recording velocities and layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If write strategy information is included within disc control information, then compatibility between different recording media is improved, but device complexity increases
Solution Approach 1:
The patent merges write strategy information with disc control information by recording both types of information in the same pre-recorded area of the optical disc. The control information structure integrates multiple functions (disc control, write strategy selection, and recording layer identification) into a unified data structure, allowing a single information unit to serve multiple purposes and thereby improving compatibility without proportionally increasing complexity
Solution Approach 2:
The control information structure is designed to be universal by accommodating multiple recording layers and writing speeds within a single information unit. Each information unit can be applied to different recording layers and speed modes, making the same control information structure versatile enough to handle various recording scenarios across different media types
2Productivity
If multiple write strategy types are supported for the same writing speed and recording layer, then recording efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the control information into multiple information units, each corresponding to a specific recording layer and writing speed combination. Within each information unit, multiple write strategy types are recorded as separate entries. This segmentation allows the system to support multiple write strategies for efficient recording while organizing the complexity in a manageable, structured manner that simplifies manufacturing and reproduction
Data Source
AI summary
In a recordable optical disc including at least one recording layer, write strategy information is recorded within disc control information, so that standardized disc control information can be uniformly applied to data recording and reproduction. At least one disc information is recorded as the disc control information within the management area. The disc control informations are recorded for at least one write strategy for a same writing speed and recording layer.