Optical Disc Error Correction with Host-Drive ECC Layering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data recording and reproducing apparatuses require additional circuits and drive controllers to enhance data reliability, which is inefficient and resource-intensive.
Innovation Solution
A data recording and reproducing apparatus that uses software-based first error correction codes and hardware-based second error correction codes to ensure data reliability on a single optical disc, without the need for new circuits or drive controllers, by dynamically adjusting error correction code ratios based on radial position and operational time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional circuits and drive controllers are added to enhance data reliability, then error correction capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces hardware-based error correction mechanisms (additional circuits and drive controllers) with a software-based solution. The host computer executes error correction processing through programs, substituting mechanical/electrical components with software logic that operates on data stored on the optical disc.
Solution Approach 2:
The host computer, which already exists for data management, is made multi-functional by adding error correction capabilities through software. Instead of requiring dedicated error correction hardware, the existing host computer performs both data management and error correction functions.
2Reliability
If redundant hardware is added for error correction, then data reliability is improved, but cost increases
Solution Approach 1:
The patent substitutes physical hardware resources (additional circuits, drive controllers, redundant discs) with software-based error correction processing. The host computer uses existing hardware resources more efficiently by implementing error correction through software algorithms rather than requiring additional physical components.
3Reliability
If error correction is performed using multiple discs and drives, then reliability is improved, but processing time increases
Solution Approach 1:
The patent performs error correction processing promptly when data is reproduced from the optical disc, rather than waiting for multiple discs to be processed. The host computer executes error correction immediately on the reproduced data using software algorithms, reducing the time loss associated with coordinating multiple drives and discs.
Data Source
AI summary
In a data recording and reproducing apparatus that includes a host computer and a drive in order to improve data reliability, in data recording, the host computer appends a first error correction code to the data and the drive appends a second error correction code to the data. When a failure has occurred in error correction performed by the drive using the second error correction code, the drive reads out the first error correction code and performs error correction using the first error correction code. Since error correction using the first error correction is possible even when error correction using the second error correction code ends in failure, the reliability of data is improved.