Optical Recording Apparatus Management Information Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical recording/reproducing apparatuses face issues where data recording is interrupted, leading to loss of management information, preventing the reproduction of AV data due to the absence of corresponding management information on the optical recording medium.
Innovation Solution
Allocating a specific area of the optical recording medium as a management information record area, where management information is periodically copied from a hard disk drive, ensuring data integrity even during abrupt power interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-volatile memory such as SRAM is added to record management information, then loss of management information is prevented during power interruption, but the structure of the internal circuit becomes complicated and product price increases
Solution Approach 1:
The patent merges the management information recording function into the optical recording medium itself by allocating a dedicated area on the medium for management information storage. This eliminates the need for a separate non-volatile memory component, thereby preventing management information loss during power interruptions while avoiding the increased circuit complexity and product cost associated with adding separate memory hardware.
Solution Approach 2:
The patent uses the optical recording medium as a copy storage location for management information. By recording management information directly onto the optical medium in a designated area, the system creates a persistent copy that survives power interruptions without requiring additional non-volatile memory components, thus maintaining reliability while avoiding extra hardware complexity.
2Productivity
If management information is stored in internal memory temporarily, then recording operation can proceed, but management information is lost when recording stops abruptly due to power interruption
Solution Approach 1:
The patent implements preliminary action by pre-allocating a dedicated management information record area on the optical recording medium before the recording operation begins. This pre-prepared storage location ensures that management information can be recorded and persisted even if the recording operation stops abruptly due to power interruption, preventing information loss while maintaining recording continuity.
Solution Approach 2:
The patent introduces the optical recording medium as an intermediary storage layer between the temporary internal memory and the final data storage. By routing management information through this intermediary medium, the system ensures that management information is preserved even when the temporary internal memory loses power, thus preventing information loss while maintaining operational continuity.
3Reliability
If a dedicated management information record area is allocated on the optical recording medium, then management information is preserved during recording interruptions, but the data record area capacity is reduced
Solution Approach 1:
The patent applies local quality by allocating a small, dedicated area on the optical recording medium specifically for management information storage, while the remaining majority of the medium capacity remains available for data recording. This localized allocation ensures management information persistence without significantly impacting the overall data record area capacity, as the management information area is kept minimal and separate from the data storage area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables proper reproduction of data from the optical recording medium by maintaining management information, even in cases of sudden power cutoff or recording interruptions, without increasing the complexity of the internal circuit or product cost.
Implementation Method 1
an optical pickup which records the encoded data onto a data record area of an optical recording medium
Data Source
AI summary
An optical recording/reproducing apparatus and a data recording method thereof. The optical recording and/or reproducing apparatus includes: an encoder which encodes a data for recording in a specified format; an optical pickup which records the encoded data onto a data record area of an optical recording medium which is loaded in the optical recording/reproducing apparatus; and a controller which allocates a specified area of the optical recording medium as a management information record area, controls the optical pickup to record the management information regarding the data being recorded in the data record area to be recorded in the management information record area, and controls the optical pickup to periodically record the management information of the management information record area onto a file information record area of the optical recording medium.