Dual ECC Encryption for Multi-Layer Disc Compatibility
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Solution Overview
Problem
Conventional recording and reproducing apparatuses designed for existing information storage media fail to properly handle new multi-layer information storage media with higher density, leading to erroneous data recording or deletion when such media are loaded, due to the lack of awareness of the new standard.
Innovation Solution
Implementing a dual ECC encoding and decoding process, where information is first ECC-encoded, encrypted, and then second ECC-encoded, with the option to insert additional information before or after encryption, to prevent conventional apparatuses from correctly reading or writing data from disks using a new standard.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a new multi-layer information storage medium with higher density is developed, then storage capacity is improved, but compatibility with conventional apparatuses deteriorates
Solution Approach 1:
The patent applies preliminary action by inserting additional information (such as standard version identifiers or layer structure markers) into the data structure before the actual data is written to the storage medium. This allows conventional apparatuses to detect the new standard format in advance and reject or handle the data appropriately, preventing erroneous recording or deletion while maintaining the high-density storage capability of the new medium
2Reliability
If encryption is applied to prevent conventional apparatuses from accessing new standard data, then data security is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by selectively encrypting only specific portions of the data structure (such as user data fields) while leaving other portions (such as metadata, error correction codes, or identification fields) unencrypted. This provides sufficient security to prevent conventional apparatuses from accessing sensitive information while maintaining manageable complexity in the encoding and decoding processes
3Reliability
If dual ECC encoding and encryption are implemented, then data integrity is improved, but processing time increases
Solution Approach 1:
The patent applies segmentation by dividing the data processing into distinct segments: first ECC encoding of the original data, then encryption of the ECC-encoded data, and finally second ECC encoding of the encrypted data. Each segment is processed independently with dedicated error correction and encryption operations, allowing for optimized processing at each stage while ensuring comprehensive data integrity protection
Data Source
AI summary
A method of encoding information and a method of decoding information, and an apparatus to perform one or both methods, and an information storage medium on which to store the information, the method of encoding the information including encrypting data between two ECC-encoding operations, and the method of decoding the information including decrypting data between two ECC-decoding operations.