Optical Disc Multi-Format Recording and Reproduction Control
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Solution Overview
Problem
Existing optical disc technologies face difficulties in quickly extracting and reproducing discrete packets from storage, especially when switching between programs recorded in different formats, such as program stream and transport stream, leading to complex recording and reproduction processes.
Innovation Solution
An information record medium and apparatus that multi-records multiple programs in different encoding formats, using an object data file, reproduction sequence file, and object information file to store packets and control information, allowing for quick selection and reproduction of desired programs by identifying packet relationships and decoding formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple programs in different encoding formats (program stream and transport stream) are stored on the same optical disc, then the disc's versatility and adaptability are improved, but the complexity of extracting and reproducing the desired program increases significantly
Solution Approach 1:
The patent segments the multiplexed stream into separate program stream packets and transport stream packets, organizing them in distinct regions on the optical disc. This segmentation allows the reproduction apparatus to quickly identify and extract the desired packet type without having to process the entire multiplexed stream, thereby reducing extraction complexity while maintaining support for multiple encoding formats
Solution Approach 2:
The patent introduces an intermediary structure (the multiplexed stream with embedded identification information) that facilitates the coexistence of different encoding formats on the same disc. This intermediary allows the system to manage the complexity of multiple formats by providing a unified access method through identification packets that indicate the encoding type, enabling smooth transitions between formats without direct complex interaction
2Speed
If programs are recorded in discrete packet format for random access, then the reproduction speed and responsiveness are improved, but the difficulty of reconstructing a continuous stream for playback increases
Solution Approach 1:
The patent performs preliminary actions by embedding identification information within each discrete packet during the recording phase. This pre-prepared identification data allows the reproduction apparatus to quickly determine the packet type and apply the appropriate reconstruction method, eliminating the need for complex real-time analysis and reducing the difficulty of stream reconstruction while maintaining fast random access capability
Data Source
AI summary
On an information recode medium, a whole stream containing a plurality of partial streams each consisting of content information including still picture information is multiplexed and recorded on packet basis. The information record medium includes a file for storing object data consisting of a plurality of packets each containing a fragment of content information and a file for storing information defining the reproduction sequence of the object data. Furthermore, the information record medium includes an object information file for storing classification information indicating whether each object data corresponds to a first encoding method or a second encoding method.