Reproducing Device Synchronizing Disk and Network Data Streams
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Solution Overview
Problem
Existing playback techniques for optical disks and similar recording media struggle to seamlessly combine and synchronize video, audio, and sub-picture data from both recorded and network-downloaded sources, limiting flexibility and disk storage efficiency.
Innovation Solution
A reproducing device with playback circuits, download data storage circuits, and selection circuits that read and switch between data streams from optical disks and network-downloaded data, allowing arbitrary combinations of video, audio, and sub-picture data to be played back synchronously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sub-picture data and audio data for multiple languages are prerecorded on the disk, then language selection flexibility is improved, but disk storage capacity is consumed
Solution Approach 1:
The system performs preliminary action by downloading additional language sub-picture and audio data from a network before playback. The reproducing device includes a download function that retrieves data from external storage media or networks, allowing users to obtain additional language data on-demand rather than pre-loading all languages, thus saving disk space while maintaining flexibility
Solution Approach 2:
The reproducing device is designed with multi-functionality to handle both disk-based playback and network downloading. The selection circuits can switch between data from the disk and downloaded data, allowing the same device to serve multiple purposes: playing back prerecorded content and dynamically adding downloaded content, thereby reducing the need for extensive disk storage
2Quantity of substance
If data is downloaded via network instead of being prerecorded on disk, then disk storage efficiency is improved, but data synchronization complexity increases
Solution Approach 1:
The data stream is segmented into multiple independent components: video data, audio data, and sub-picture data. Each can be selected and switched independently through separate selection circuits. This segmentation allows the system to handle downloaded data separately from disk data, simplifying synchronization by treating each data type as an independent selectable stream
Solution Approach 2:
The selection circuits act as intermediaries between the multiple data sources (disk and downloaded data) and the playback system. These circuits receive data from both sources and selectively route the appropriate data streams to the playback circuits, managing the complexity of switching between sources without burdening the core playback mechanism
3Adaptability or versatility
If selection circuits switch between disk data and downloaded data, then playback flexibility is improved, but switching control complexity increases
Solution Approach 1:
The system implements dynamic switching capability where the selection circuits can change data sources during playback based on user selection. The reproducing device allows users to select which language's sub-picture and audio data to use, and the selection circuits dynamically switch between disk-based data and downloaded data in real-time, providing flexible adaptation without requiring complex pre-planning
Data Source
AI summary
A reproducing device for playing back data from a recording medium, including: playback circuits for playing back at least two stream data in a time division multiplexing manner from a recording medium that records: first stream data which includes first video data, first audio data, and first sub-picture data, and second stream data which includes second video data, second audio data, and second sub-picture data; and selection circuits for conducting at least one of: switching from the first video data to the second video data, switching from the first audio data to the second audio data, and switching from the first sub-picture data to the second sub-picture data; wherein data which is newly switched by the selection circuits and the data which is not switched by the selection circuits, are synchronously superimposed and outputted.