Information Processing Apparatus Subpicture Extraction via Extract Base Track
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Solution Overview
Problem
The existing technologies for reproducing subpictures in a VVC track require analyzing and generating parameter sets, which can lead to an increase in the load of reproduction processing.
Innovation Solution
An information processing apparatus and method that generate a file containing a bitstream track and an extract base track. The bitstream track stores content with subpictures, while the extract base track stores subpicture specifying information for extracting subpictures from the bitstream track.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If subpictures are stored in a VVC track, then multiple subpictures can be stored in one track, but reproduction processing load increases due to the need to analyze and generate parameter sets
Solution Approach 1:
The patent divides the bitstream track into multiple independent subpicture units, each with its own parameter set. This segmentation allows the reproduction device to selectively decode only the required subpictures without processing the entire bitstream, thereby reducing reproduction processing load while maintaining the ability to store multiple subpictures in one track.
Solution Approach 2:
The patent performs preliminary organization of subpicture data and parameter sets during the encoding phase. Each subpicture is pre-configured with its own parameter set and stored in a structured format within the bitstream track. This preliminary action enables the reproduction device to quickly access and decode specific subpictures without needing to analyze the entire bitstream structure during playback.
2Ease of operation
If parameter sets are analyzed and generated for reproducing subpictures, then subpicture reproduction is enabled, but reproduction processing efficiency decreases
Solution Approach 1:
The patent segments the parameter sets so that each subpicture has its own independent parameter set stored in the bitstream. This allows the reproduction device to extract and use only the parameter set corresponding to the specific subpicture being decoded, avoiding the need to analyze and process parameter sets for all subpictures in the track, thereby improving reproduction processing efficiency.
Solution Approach 2:
The patent introduces an intermediary structure (the organized bitstream track with embedded parameter sets) that facilitates efficient access to subpicture data. This intermediary structure acts as a mediator between the stored bitstream and the reproduction process, enabling the device to quickly locate and use the necessary parameter sets without extensive analysis.
3Measurement precision
If the entire bitstream is analyzed for subpicture extraction, then accurate subpicture identification is achieved, but processing time increases
Solution Approach 1:
The patent segments the bitstream into distinct subpicture units with clear boundaries and identification markers. Each subpicture is associated with its own parameter set and stored in a structured format, enabling the reproduction device to quickly identify and extract specific subpictures without needing to analyze the entire bitstream, thus maintaining accurate identification while reducing processing time.
Solution Approach 2:
The patent performs preliminary organization of subpicture data during encoding, including the insertion of identification information and structured parameter sets for each subpicture. This preliminary action enables the reproduction device to efficiently locate and extract specific subpictures based on their identification information without performing extensive analysis during the reproduction phase.
Data Source
AI summary
The present disclosure relates to an information processing apparatus and a method capable of suppressing an increase in load of reproduction processing.A file storing a bitstream track storing a bitstream of content having a subpicture in a frame and an extract base track storing subpicture specifying information which is information for specifying a subpicture to be extracted in the bitstream track is generated. Further, a subpicture is extracted from the bitstream track and a bitstream is generated on the basis of the extract base track of the file. The present disclosure can be applied to, for example, an information processing apparatus, an information processing method, or the like.