Compact Disc Controllable Element for Copy Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for protecting compact discs against illegal copying, such as static protection and non-standard encoding, are either breakable by automatic tools or require specific drives, limiting their compatibility with standard drives.
Innovation Solution
A compact disc medium is equipped with a controllable element that can change states in response to centrifugal force or a command, allowing it to modify its content and enable secure authentication and data interchange with standard drives through controlled rotation speeds and micro-actuators or piezoelectric elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static protection techniques including inserting errors in certain locations of the content of the disc are used, then protection against copying is provided, but such protection can be broken by automatic tools
Solution Approach 1:
The patent applies dynamics by making the protection mechanism adaptive rather than static. The drive automatically adjusts reading parameters (such as focus, tracking, or reading speed) based on detected disc characteristics. This dynamic adaptation creates a protection mechanism that is difficult to break because it responds to attempted copying attempts, transforming the static error-insertion approach into an active, adaptive security system.
2Reliability
If non-standard encoding is used for encoding the content of the compact disc, then protection is provided, but a standard drive cannot be used and a dedicated drive is required
Solution Approach 1:
The patent achieves universality by enabling standard drives to perform protective functions through automatic parameter adjustment. The same drive can read both protected and unprotected discs by adapting its reading parameters. This multi-functionality allows a single standard drive to handle various disc types without requiring dedicated hardware, thereby maintaining compatibility while providing protection capabilities.
3Reliability
If an external chip, for example a radio frequency label, is fixed on the medium for authentication, then authentication capability is provided, but a specific drive comprising a contactless reading module is required
Solution Approach 1:
The patent replaces the need for external authentication chips and contactless reading modules with a mechanical/optical parameter adjustment system. Instead of adding electronic authentication hardware, the drive uses automatic adjustment of reading parameters to authenticate discs. This substitution eliminates the need for additional hardware components while maintaining authentication capability, thereby reducing device complexity.
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 provides secure authentication and data interchange with standard drives, preventing unauthorized copying by modifying the disc's content based on rotation speeds, ensuring compatibility and security without requiring specialized hardware.
Implementation Method 1
The at least one element is configured to take selectively one of these states under the application of a centrifugal force forming the command and resulting from a rotation of the medium
Implementation Method 2
micro-actuators or piezoelectric elements
Data Source
AI summary
A data medium of the compact disc type may include medium areas of different types configured to define digital content, and a controllable element having two different states corresponding respectively to the two different types of areas. The controllable element may be configured to take selectively one of its states in response to a command, so as to modify in a controllable manner the content of the data medium.