Document Segmentation and Keyphrase Navigation for Small Screens
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Solution Overview
Problem
Conventional methods for displaying documents on small information displays, such as cell phones or PDAs, are inefficient as they fail to effectively render textual information due to size limitations, lacking mechanisms for visualizing keyphrases and providing interactive navigation.
Innovation Solution
The system identifies multiple segments of a document, determines keyphrases, and associates them with each segment, allowing users to select and navigate through these segments using a processing unit and display controller, which generates visual representations based on keyphrase occurrences, enabling efficient viewing on small screens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional document display methods are used on small screens, then the device portability is maintained, but the readability and viewing efficiency deteriorates
Solution Approach 1:
The patent segments the document into multiple sections and creates a table of contents that fits within the limited screen area. Users can navigate through segmented content without needing to view the entire document at once, resolving the contradiction between maintaining small screen size and improving readability.
Solution Approach 2:
The patent introduces a hierarchical navigation dimension by creating a table of contents overlay that allows users to access different parts of the document through vertical scrolling in a compact list format, rather than requiring horizontal expansion of the display area.
2Productivity
If full document text is displayed on small screens, then complete information is provided, but navigation efficiency and user interaction deteriorates
Solution Approach 1:
The document is segmented into logical sections with descriptive headings that preserve context. The table of contents displays these segments in a navigable format, allowing users to efficiently locate information while maintaining understanding of document structure and context.
Solution Approach 2:
The system performs preliminary processing to extract section headings and create a structured table of contents before user interaction. This preliminary organization enables efficient navigation without losing document context, as the hierarchical structure is prepared in advance.
3Adaptability or versatility
If document sections are segmented and keyphrases are extracted, then navigation capability is improved, but processing complexity increases
Solution Approach 1:
The system extracts only the essential keyphrases and section headings from the full document text, separating the navigation-critical information from the complete content. This extraction process improves navigation capability while managing processing complexity by focusing on essential elements only.
Data Source
AI summary
Described is a system that characterizes segments of a document with one or more keyphrases and then uses the keyphrases to help users find interesting parts of a document. The keyphrases are displayed with information about the location of the phrase in the document and are used as pointers to quickly move to from an overview to a section of potential interest.