Optical Recording Medium Wobble Address Encoding

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Solution Overview

Problem

Conventional Blu-ray Disc address structures are insufficient for increased recording capacity, as the number of wobble address bits embedded in the wobble address structure is limited, necessitating a reconstruction of the wobble structure to maintain data integrity and compatibility with existing recording media.

Innovation Solution

The proposed solution involves increasing the Physical Sector Number (PSN) recording area by reassigning and encoding other information within the wobble address structure, allowing for additional wobble address bits without significant changes to the existing bit structure, and using decoding processes to restore embedded information during reproduction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the number of PAA bits embedded in the wobble is increased to keep up with the increase in recording capacity, then the recording capacity is sufficient, but the wobble address structure requires great reconstruction

Engineering Contradiction:

Improverecording capacityVSAvoidwobble address structure

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The invention embeds additional address information within the existing wobble address structure by utilizing the relationship between PSN and PAA. Specifically, the five unused bits (bits 31-27) of the 32-bit PSN are mapped to extend the PAA information, effectively nesting additional address capacity within the原有 wobble framework without requiring structural reconstruction

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The invention changes the parameter allocation within the address structure by reassigning the unused upper bits of PSN to carry additional PAA information. This parameter reallocation allows the system to increase effective address bits from 27 to 32 bits while maintaining the same wobble physical structure

Inventive Principle:

Principle #35Parameter changes

2Loss of information

If the PSN recording area is increased to provide more address bits, then the number of wobble address bits increases, but the area available for other information decreases

Engineering Contradiction:

Improveaddress bitsVSAvoidwobble address area

Core Design Contradiction:

Loss of informationVSArea of stationary object

Solution Approach 1:

The invention resolves the area conflict by utilizing the dimensional relationship between PSN and PAA. By mapping the five unused bits of PSN to extend PAA information, the system effectively adds address capacity in a different dimensional space (bit allocation) without physically expanding the wobble area

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS8331214B2Optical recording medium capable of increasing the number of wobble address bits and method for recording and reproducing thereof

Publication Date: 2012.12.11 KONINKLIJKE PHILIPS NV

AI summary

In a recording medium, an extension address is obtained without changing the number of bits of the address embedded in the wobble. The wobble address is partially or wholly encoded to embed the address information. At the time of reproducing the address information, the original address information is obtained by restoring the embedded information by the decoding process.