Optical Disc Recording Blocks With Padding Identifiers for Error Correction
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Solution Overview
Problem
Current disc drive systems face inefficiencies when recording or updating data due to the inability to distinguish between valid and invalid data in error correction blocks, leading to unnecessary operations and decreased error correction capability.
Innovation Solution
Incorporating a padding identifier in the recording/reproducing unit block to indicate the presence of invalid data during disc certification, allowing for improved data recording and error correction by distinguishing between valid and invalid data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the disc drive performs error correction on the entire error correction block including invalid data, then error correction capability is maintained, but unnecessary operations are performed and productivity decreases
Solution Approach 1:
The patent extracts and separates the valid data portion from the invalid data portion within the error correction block by introducing a padding identifier. This allows the system to identify and process only the valid data portion for error correction, eliminating unnecessary error correction operations on invalid data and improving processing efficiency.
Solution Approach 2:
The patent performs preliminary action by recording a padding identifier in the access block before data recording operations. This identifier预先 marks the presence and extent of invalid data portions, enabling the disc drive to skip error correction on those portions and directly proceed with valid data processing, thus improving productivity.
2Reliability
If the disc drive performs read-modify-write process for every data update, then data integrity is maintained, but operation time increases
Solution Approach 1:
The patent extracts the padding identifier information from the access block to identify valid data portions, allowing the system to perform read-modify-write operations only on those portions rather than on the entire cluster. This selective processing maintains data integrity while significantly reducing operation time.
Solution Approach 2:
The patent applies partial action by performing error correction and read-modify-write operations only on the valid data portion of the cluster rather than the entire cluster. The padding identifier enables the system to determine the exact boundaries of valid data, allowing partial processing that maintains integrity while reducing time loss.
3Reliability
If the disc drive cannot distinguish valid data from invalid data, then error correction is performed on all data, but unnecessary error messages are transmitted to the host
Solution Approach 1:
The patent introduces a padding identifier as an intermediary element that mediates between the valid and invalid data portions. This identifier is recorded in the access block and serves as a guide for the error correction process, enabling the disc drive to accurately distinguish valid data from invalid data without transmitting unnecessary error messages to the host.
Data Source
AI summary
A recording medium on which a recording/reproducing unit block is recorded, an apparatus to record and/or reproduce data on/from the recording medium, and a method of recording/reproducing the data on/from the recording medium. The recording/reproducing unit block comprises invalid data used in disc certification, and an identifier to indicate that the invalid data is included in the recording/reproducing unit block, the invalid data being used during the disc certification on a portion of the recording medium or the entire recording medium.