Optical Disc Reproducing Apparatus Extra Track Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Users of optical disc reproducing apparatuses face inconvenience in recognizing and managing extra tracks on high-density optical discs, which can contain surround test signals or other unwanted audio data, leading to unexpected reproduction of abnormal sounds and misunderstandings about the device's functionality.
Innovation Solution
An optical disc reproducing apparatus and method that identifies and allows users to selectively reproduce main and extra tracks by determining the presence of extra tracks based on track numbers, providing user notifications, and enabling track designation for targeted reproduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If extra tracks are recorded on high-density optical discs, then the disc contains additional audio content, but users cannot recognize the existence of extra tracks and may unexpectedly reproduce unwanted audio data
Solution Approach 1:
The system performs preliminary identification of extra tracks by comparing track numbers between CD layer and HD layer before reproduction. It notifies users in advance about the presence of extra tracks and their locations, allowing users to make informed decisions about reproduction targets without unexpectedly playing unwanted audio data.
2Adaptability or versatility
If surround test signals are recorded on extra tracks, then the disc provides speaker setup functionality, but reproducing these signals creates abnormal sounds that confuse users
Solution Approach 1:
The system identifies tracks containing surround test signals in advance by comparing track numbers and notifying users before reproduction. This preliminary notification prevents users from accidentally reproducing test signals that would create abnormal sounds, while still preserving the functionality of having test signals available on the disc for intentional use.
3Object-affected harmful factors
If users want to avoid reproducing extra tracks, then they must manually check jackets and switch reproduction targets, but this increases operation complexity
Solution Approach 1:
The system automatically performs track number comparison between CD layer and HD layer to identify extra tracks, and provides notifications to users without requiring manual intervention. This self-service approach eliminates the need for users to manually check jackets or switch reproduction targets, reducing operational complexity while preventing unwanted reproduction.
Solution Approach 2:
The system provides feedback to users about the presence, location, and content of extra tracks through notifications. This feedback mechanism enables users to understand what additional content exists on the disc and make informed decisions about reproduction, eliminating the need for manual checking and simplifying operation.
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
Enhances user convenience by allowing explicit control over track reproduction, preventing unexpected playback of unwanted audio data and improving user experience by clearly indicating the presence of extra tracks before playback.
Implementation Method 1
an optical pickup and an aperture ratio objective lens... varying a wavelength of the laser beam irradiated from an optical pickup
Data Source
AI summary
An optical disc reproducing apparatus includes a reproducing section which reproduces a first audio data item involving a predetermined number of main track and recorded in a first recording area on the optical disc, and a second audio data item involving an extra track in addition to a main track containing the same contents as those of the predetermined number of main track and recorded in a second recording area on the optical disc, and an identification section which identifies each of the main track and the extra track for the second audio data item, based on the number of tracks for the first audio data and the second audio data.