Blu-ray Text Subtitle Stream Data Structure for Style Segmentation
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Solution Overview
Problem
The development of Blu-ray Disc (BD) optical reproducing apparatuses is hindered by incomplete standards for supplementary data, particularly subtitle stream files, which restrict the full-scale development and effective provision of subtitles to users.
Innovation Solution
A recording medium and method for reproducing and recording text subtitle streams, involving a data structure that includes dialog style segments defining region styles and dialog presentation segments with inline styles and text strings, allowing for effective reproduction and recording of text subtitle streams on Blu-ray Discs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If Blu-ray Disc standards are developed to provide high-definition video and audio data, then storage capacity and data quality are improved, but the incomplete standards for supplementary data (subtitle stream files) hinder full-scale development and effective provision of subtitles to users
Solution Approach 1:
The subtitle stream file is segmented into distinct components: dialog style segments defining region styles, and dialog presentation segments containing actual subtitle data. This segmentation allows each component to be independently standardized and processed, resolving the contradiction between storage capacity and subtitle provision adaptability.
Solution Approach 2:
The patent applies local quality by defining specific style attributes (font, size, color, position) that can be independently customized for different regions and dialog presentations. This allows high-definition video and audio to be stored with comprehensive subtitle styling capabilities, enabling both large storage capacity and versatile subtitle adaptation.
2Manufacturing precision
If a comprehensive data structure with style information is implemented for text subtitle streams, then subtitle presentation quality and customization are improved, but system complexity increases
Solution Approach 1:
Style information is predefined in dialog style segments before subtitle presentation. This preliminary action allows the comprehensive data structure to be prepared in advance, reducing runtime processing complexity while maintaining high subtitle presentation quality through pre-configured styles.
Solution Approach 2:
The patent extracts style information into separate dialog style segments, distinct from dialog presentation segments. This extraction reduces the complexity burden on the presentation layer while preserving comprehensive styling capabilities, as styles are independently defined and referenced.
3Adaptability or versatility
If inline styles are added to change region presentation properties for text strings, then subtitle customization flexibility is improved, but data processing complexity increases
Solution Approach 1:
Inline styles apply local quality changes to specific text strings within regions, allowing precise customization of font, size, color, and position for individual text elements. This local application of style changes enhances customization flexibility while keeping processing complexity manageable through targeted rather than global modifications.
Solution Approach 2:
The patent adds an inline style dimension to the subtitle data structure, layering text-specific styling attributes over the existing region-based structure. This dimensional addition provides enhanced customization flexibility without fundamentally restructuring the entire data system, thereby limiting the increase in processing complexity.
Data Source
AI summary
A recording medium and method and apparatus for reproducing and recording text subtitle streams are disclosed. Each text subtitle stream includes a dialog style segment defining a set of region styles and at least one dialog presentation segment, each of which contains one or more regions of dialog text. Each region of dialog text is linked to one of the set of region styles defined in the dialog style segment, and includes at least one pair of an inline style and a text string. The inline style is configured to change one of region presentation properties specified by the linked region style for the text string.