Playback Device Playlist Event Retrieval
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Solution Overview
Problem
Existing playback devices require extensive reprocessing of video or audio data streams to change event information, which is inefficient and resource-intensive, especially when event information is stored within the stream.
Innovation Solution
Retrieving event information from a playlist associated with the data stream allows for changes without reprocessing the stream, enabling timely activation of associated functionalities during playback while reducing processing resources and maintaining compatibility with existing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If event information is stored in the data stream, then the functionality can be provided at the appropriate position during playback, but the data stream must be reprocessed extensively to change event information
Solution Approach 1:
The patent separates event information from the data stream by introducing a playlist structure. The playlist is divided into segments (PLAYLIST_ITEMS) that contain event information independently from the main video/audio stream. This segmentation allows the event information to be modified without reprocessing the entire data stream, as each playlist item can be updated separately.
Solution Approach 2:
The playlist acts as an intermediary layer between the data stream and the event information. Instead of storing event information directly in the data stream, the playlist serves as a mediator that contains timing and event data. This intermediary structure enables flexible modification of event information without affecting the original data stream, resolving the contradiction between timing accuracy and processing efficiency.
2Reliability
If event information is retrieved from the data stream, then the functionality can be activated at the correct moment, but extensive reprocessing of the data stream is required
Solution Approach 1:
The patent extracts event information from the data stream by introducing a separate playlist structure. The playlist contains PLAYLIST_ITEMS that hold event information independently. This extraction allows the system to maintain timing correlation through the playlist's timing mechanisms while avoiding the need to reprocess the entire data stream, thereby reducing processing resources required.
Solution Approach 2:
The playlist is retrieved and processed in advance before playback occurs. The PLAYLIST_ITEMS are parsed and stored with their timing information beforehand. This preliminary action allows the system to have event information ready without requiring extensive reprocessing during or after playback, reducing the processing resources needed at critical times.
3Loss of time
If event information is stored in the data stream, then the functionality can be provided timely, but the data stream must be reprocessed for any changes
Solution Approach 1:
The patent introduces a dynamic playlist structure that can be modified independently of the data stream. The PLAYLIST_ITEMS can be updated, added, or removed dynamically without triggering a complete reprocessing of the data stream. This dynamic structure allows for fast response to event information changes while maintaining high processing productivity, as only the playlist needs to be reprocessed rather than the entire data stream.
Data Source
AI summary
Instead of using events stored in the datastream itself, applications can retrieve event information from the playlist on a record carrier such as DVD and blu-disc. By retrieving the event information from the playlist changes in the event information do not require reprocessing of the data stream. In addition the application knows before the start of the playback of the data stream where the events are located and what functionality in terms of resources is required. A better scheduling of resources is thus possible.