Optical Disk Recording Capacity Adaptation via BCA Management
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Solution Overview
Problem
Conventional optical disks require changes in manufacturing and management processes whenever recording capacity is altered, leading to increased complexity as different capacities necessitate distinct optical disks.
Innovation Solution
An optical disk with a disk management information area and a recording system identification area, accessed by a device featuring a burst cutting area playback circuit and system controller, allows for multiple recording capacities on a single disk by adjusting recording parameters based on stored information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If information recorded in advance is changed to achieve different recording capacities, then recording capacity is improved, but manufacturing and management complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-recording disk management information in the BCA area during manufacturing, including multiple possible recording capacity values. This allows the optical disk to support multiple recording capacities without requiring different manufacturing processes for each capacity, as the capacity selection information is prepared in advance during a single manufacturing run.
Solution Approach 2:
The patent implements parameter changes by storing multiple recording capacity parameters (e.g., 2.6GB, 1.46GB, 730MB) in the disk management information area, and allowing the recording/playback device to select among these parameters based on the actual recording mode. This enables a single optical disk to adapt to different recording capacities by changing the selected parameter rather than requiring physical manufacturing changes.
2Adaptability or versatility
If multiple optical disks with different recording capacities are manufactured, then recording capacity options are improved, but manufacturing processes become more complicated
Solution Approach 1:
The patent applies universality by designing a single optical disk format that can serve multiple recording capacity functions. The disk management information area contains capacity identification information that enables the same physical disk to be used with different recording capacities (2.6GB, 1.46GB, 730MB), eliminating the need for separate manufacturing lines for each capacity variant.
Solution Approach 2:
The patent uses preliminary action by pre-configuring multiple capacity options in the BCA during manufacturing, so that the disk is prepared to support various capacities without requiring post-manufacturing modifications or separate production processes for each capacity type.
3Quantity of substance
If recording capacity is increased, then data storage capability is improved, but compatibility with existing devices decreases
Solution Approach 1:
The patent implements parameter changes by allowing the recording capacity to be selected from multiple pre-stored values in the disk management information. The playback device reads the capacity identification information and adjusts its parameters accordingly, enabling compatibility across different capacity configurations without requiring multiple specialized devices.
Solution Approach 2:
The patent applies feedback by having the playback device read the capacity identification information from the BCA area and use this information to configure its recording/playback parameters. This feedback mechanism ensures that the device adapts to the correct capacity settings, maintaining compatibility whether the disk is used for 2.6GB, 1.46GB, or 730MB recording.
Data Source
AI summary
An optical disk includes a disk management information area in which predetermined information is recorded in advance, and a recording system area in which information for identifying a recording system of the optical disk recorded in a predetermined position within a non-data area included in a recordable area is recorded. A method for accessing the optical disk is decided based on disk management information and the information for identifying a recording system.