Playback Apparatus Network Authentication and Screen Synchronization
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Solution Overview
Problem
Conventional playback apparatuses for next-generation recording media, such as Blu-ray Disk and HD DVD, face usability issues in implementing the Picture in Picture (PiP) function, particularly in synchronizing and positioning child screens with main screens, and lack secure authentication for acquiring and displaying complementary content from networks.
Innovation Solution
A playback apparatus that includes a drive unit, packet separation units, video and audio decoders, a network connection, and a system control unit to multiplex and superimpose main and child streams, with authentication mechanisms to securely acquire and display complementary content from networks, enhancing usability and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a child screen is moved within the parent screen to allow flexible positioning, then the ease of operation is improved, but the synchronization between main and child screens becomes difficult to maintain
Solution Approach 1:
The system dynamically adjusts the child screen position automatically to maintain synchronization with the main screen. The playback apparatus monitors the main screen content and automatically repositions the child screen to display complementary content at appropriate locations, eliminating the need for manual user adjustment while maintaining synchronization reliability.
Solution Approach 2:
The system implements a feedback mechanism where the position and content of the main screen are continuously monitored, and the child screen position is automatically adjusted based on this feedback. This closed-loop control ensures that the child screen remains synchronized with the main screen content while providing flexible positioning capabilities.
2Ease of manufacture
If parental lock function is set in individual playback apparatus, then the ease of manufacture is improved, but the security is weakened
Solution Approach 1:
The patent introduces a network server as an intermediary to manage parental lock authentication. Instead of implementing security functions locally in each playback apparatus, the system uses a centralized server to verify parental authorization codes and manage content access rights. This distributes the security management burden while maintaining strong security through centralized control.
3Productivity
If complete pictures are recorded on the medium, then the productivity is improved, but the recording time is reduced
Solution Approach 1:
The patent segments video content into multiple resolutions and stores them separately on the recording medium. Instead of storing complete high-resolution videos, the system stores multiple resolution versions (e.g., standard definition and high definition) of the same content. This allows the medium to store more content segments within the same capacity, effectively increasing recording time while maintaining productivity through network-based delivery of complementary high-resolution data.
4Reliability
If authentication is carried out through the Internet, then the reliability is improved, but the device complexity is increased
Solution Approach 1:
The playback apparatus automatically performs network authentication and content acquisition without requiring manual user configuration. The system self-manages the authentication process by automatically communicating with the network server, verifying authorization codes, and acquiring complementary content. This automated self-service approach maintains high security through Internet-based authentication while minimizing the operational complexity for users.
Data Source
AI summary
An area not displayed by a first stream recorded in a disk is complemented by a second stream which is transmitted from a server through a network to a playback apparatus. A picture represented by the second stream is superimposed on a picture represented by the first stream to display a complete picture. A sound included in the second stream is also mixed with a sound included in the first stream to output a complete sound.