Optical Disc Still Image Data Structure and Navigation

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Solution Overview

Problem

There is a lack of effective data structures for managing the reproduction of still images on high-density read-only optical disks like Blu-ray ROM, which limits user interaction and playback options.

Innovation Solution

A data structure is introduced on the recording medium that includes navigation areas with specific information for displaying still images, such as playlist marks and indicators, which provide control over the duration and display of still images, allowing for finite or infinite display periods, and enabling user interaction through playitems and sub-playitems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a data structure for managing still image reproduction is implemented on high-density optical disks, then user interaction and playback options are enhanced, but the device complexity increases due to additional navigation areas and playlist structures

Engineering Contradiction:

Improveplayback optionsVSAvoiddata structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The data structure is segmented into distinct navigation areas and playlist directories, with each serving specific functions. Playlists are divided into playitems and sub-playitems, allowing organized management of still images without overwhelming complexity in the overall system.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a new dimensional layer of playlist directories and navigation areas above the basic clip file structure. This additional organizational dimension enables sophisticated still image playback management while keeping the underlying storage structure intact.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Ease of operation

If navigation information is added to manage still image display duration and options, then user interaction is improved, but the loss of information increases due to additional data fields required

Engineering Contradiction:

Improveuser interactionVSAvoiddata overhead

Core Design Contradiction:

Ease of operationVSLoss of information

Solution Approach 1:

Navigation information is extracted into separate playlist files and navigation areas, distinct from the core clip file data. This separation allows detailed playback control information to be stored without bloating the primary video data structure, minimizing information loss overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Playlist files serve as intermediary structures between the user interface and the underlying clip file storage. They mediate the interaction by containing navigation information that translates user preferences into playback actions without requiring direct modification of the clip file structure.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If playlist marks and navigation information are stored to control still image playback, then playback control precision is improved, but the device complexity increases due to additional playlist directories and fields

Engineering Contradiction:

Improveplayback controlVSAvoidplaylist structure

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The playlist structure employs nested organization where playlists contain playitems, which in turn contain sub-playitems and navigation information. This nested doll approach allows precise playback control at multiple levels while maintaining a hierarchical structure that manages complexity through organized nesting rather than flat expansion.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS7747133B2Recording medium having data structure for managing reproduction of still images from a clip file recorded thereon and recording and reproducing methods and apparatuses

Publication Date: 2010.06.29 LG ELECTRONICS INC

AI summary

The recording medium includes a navigation area having navigation information recording therein. The navigation information indicates a portion of a clip file, which includes video data, to display as a still image and a duration to display the still image.