Reproduction History Management for Multi-User Content Playback
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Solution Overview
Problem
Existing reproduction systems fail to allow multiple users to easily identify and resume playback from their unwatched portions of shared content, requiring each user to manually search for their previous stop position.
Innovation Solution
A reproduction apparatus and method that includes a recognition unit for identifying users, a generation unit for creating reproduction history information, and a control unit that skips to unwatched portions based on user recognition, enabling easy identification and playback of unwatched content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single shared reproduction stop position is stored for content, then the system is simple and storage is efficient, but each user cannot identify their own unwatched portions when multiple users access the same content
Solution Approach 1:
The patent segments the reproduction history into user-specific portions by introducing user identification mechanisms. Each user's watch history is stored separately, allowing the system to distinguish between different users' viewing progress on the same content. This segmentation resolves the contradiction by enabling personalized content tracking without requiring complete system redesign.
Solution Approach 2:
The patent introduces an intermediary component (reproduction history management unit) that mediates between the content reproduction system and multiple users. This intermediary stores and manages individual reproduction histories, acting as a bridge that connects content to specific users while maintaining system simplicity. The intermediary handles the complexity of user-specific tracking without burdening the core reproduction functionality.
2Loss of information
If reproduction history is stored for each user, then each user can identify their unwatched portions, but the system complexity and storage requirements increase
Solution Approach 1:
The patent uses copying by creating user-specific copies of reproduction history data. Instead of maintaining a single master history, the system generates and stores separate history records for each user. This copying approach preserves all user-specific viewing progress information while using standard data storage techniques, avoiding the need for complex distributed storage systems.
Solution Approach 2:
The reproduction history management unit is designed with multi-functionality, serving as a universal component that handles user identification, history storage, and retrieval for all users. This universal component reduces overall system complexity by consolidating multiple functions into a single manageable unit, rather than requiring separate mechanisms for each function.
3Productivity
If the system automatically tracks and displays unwatched portions for multiple users, then user convenience is improved, but the processing overhead and system resources increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing the unwatched portion information for each user. When a user accesses content, the system has already prepared the relevant history data, enabling immediate resumption without real-time computation. This preliminary preparation reduces processing overhead during actual content access while maintaining high user convenience.
Solution Approach 2:
The system implements self-service by automatically managing reproduction history without requiring manual user input. The reproduction history management unit autonomously tracks viewing progress, identifies unwatched portions, and presents this information to users. This automation improves productivity by eliminating manual searching while the system efficiently manages processing resources through intelligent algorithms.
Data Source
AI summary
A reproduction apparatus comprises a reproduction unit configured to reproduce image data from a recording medium; a detection unit configured to detect users; and a generation unit configured to generate, for each of a plurality of users, management information for distinguishing a portion that has been reproduced and a portion that has not been reproduced in the image data recorded in the recording medium.