DVD Management Area Identification for Finalize Time Reduction
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Solution Overview
Problem
The existing DVD-RW technology faces increased manufacturing costs and longer finalize process times due to the need for forming readable embossed pits in control data zones and pre-recording in buffer areas, which complicates the recognition of recording layers and necessitates time-consuming searches for recording and reproduction.
Innovation Solution
An information recording medium with management areas that include identification information for embossed pits and pre-recording status, allowing the recording/reproducing apparatus to recognize and adjust recording/reproducing processes without performing RF or LPP searches, thereby reducing the finalize process time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If readable embossed pits are formed in the control data zone and pre-recording is performed in the buffer area, then the finalize process time is reduced, but the manufacturing cost increases and the manufacturing process becomes more complex
Solution Approach 1:
The patent applies preliminary action by pre-forming embossed pits in the control data zone and pre-recording in the buffer area during the manufacturing process. This advance preparation eliminates the need for time-consuming searches during the finalize process, directly reducing finalize process time while the manufacturing complexity is contained within the production phase rather than the operation phase
2Loss of time
If readable embossed pits are formed in the control data zone and pre-recording is performed in the buffer area, then the finalize process time is reduced, but the manufacturing cost increases
Solution Approach 1:
The patent applies preliminary action by pre-forming embossed pits in the control data zone and pre-recording in the buffer area during the manufacturing process. This advance preparation eliminates the need for time-consuming searches during the finalize process, directly reducing finalize process time while the manufacturing complexity is contained within the production phase rather than the operation phase
3Measurement precision
If the apparatus performs RF or LPP searches to identify recording areas, then accurate recording can be achieved, but the recording time increases
Solution Approach 1:
The patent applies preliminary action by pre-forming embossed pits and pre-recording in the buffer area during manufacturing. This creates pre identifiable markers that eliminate the need for time-consuming RF or LPP searches during actual recording operations, allowing the apparatus to directly access recording areas without preliminary searches
Solution Approach 2:
The patent uses embossed pits as intermediary markers that serve as pre-established reference points. These embossed pits act as mediators between the recording apparatus and the recording layers, providing clear identification without requiring complex search procedures, thus achieving both accuracy and speed
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
This solution enables faster and more efficient recording and reproduction by allowing the apparatus to quickly identify recording areas and omit unnecessary searches, thereby reducing manufacturing costs and finalize process time.
Implementation Method 1
information is recorded in an irreversible change recording method by heat or the like, or in a rewritable method, into a recording layer located on the front (i.e. on the closer side to an optical pickup) viewed from a laser light irradiation side, by focusing the laser light for recording on the L0 layer
Implementation Method 2
information is recorded in an irreversible change recording method by heat or the like
Implementation Method 3
information is recorded in the irreversible change recording method by heat or the like, or in the rewritable method, into a recording layer located on the rear (i.e. on the farther side to the optical pickup) viewed from the laser light irradiation side, by focusing the laser light for recording on the L1 layer through the L0 layer
Data Source
AI summary
An information recording medium is provided with: a recording layer (L0 layer, L1 layer) having one or a plurality of predetermined recording areas (CDZ, 101 and the like) in which record data including buffer data in a finalizing process can be recorded; and a management area (CDZ) in which the management information (50a) can be recorded, the management information including first identification information (51a) for identifying whether or not embossed pits are formed in the predetermined recording area.