Optical Disc Metadata Segmentation for Searchable Video
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Solution Overview
Problem
Conventional storage media, such as DVDs, lack the ability to reproduce audio-visual data based on user-defined search conditions like scene, characters, or background music, and are unable to edit or reuse audio-visual data or metadata once produced, due to compression and encoding limitations.
Innovation Solution
A storage medium with metadata that includes predefined and author-defined search keywords, allowing for an extended search function, where metadata can be in binary or text-based formats, enabling users to search and reproduce audio-visual data based on various search conditions, and supporting multiple languages by separating language-related parameters into additional text-based files.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If audio-visual data are compressed and encoded according to MPEG2 standard, then storage efficiency is improved, but the ability to store metadata for search functions is lost
Solution Approach 1:
The patent segments the storage medium into distinct areas: a first area for compressed audio-visual data and a second area for storing metadata. This segmentation allows both compressed video data and search-friendly metadata to coexist without interfering with each other, resolving the contradiction between storage efficiency and search functionality.
Solution Approach 2:
The patent introduces an intermediary structure (the second area for metadata) that mediates between the compressed audio-visual data and the search function. This metadata area acts as a bridge, containing uncompressed search keywords and scene information that enables efficient searching without requiring the main video data to be uncompressed.
2Adaptability or versatility
If conventional storage media are used, then compatibility with existing systems is maintained, but extended search functions based on user-defined criteria cannot be implemented
Solution Approach 1:
The storage medium is divided into functional segments: compressed video data in the first area and uncompressed metadata in the second area. This segmentation allows the system to maintain compatibility with existing MPEG2 playback systems while adding enhanced search capabilities through the separate metadata area.
Solution Approach 2:
Different areas of the storage medium have different quality characteristics: the first area uses compressed data for efficient storage, while the second area uses uncompressed metadata for optimal search performance. This local differentiation of data quality resolves the contradiction between maintaining simple storage structures and enabling advanced search functions.
3Quantity of substance
If audio-visual data are compressed and multiplexed, then storage capacity is improved, but the ability to edit or reuse data after production is lost
Solution Approach 1:
By segmenting the storage into compressed video data and separate uncompressed metadata, the patent enables independent processing of each area. The uncompressed metadata area can be edited, searched, and reused without affecting the compressed video data, thus maintaining storage capacity while improving post-production flexibility.
Solution Approach 2:
The patent extracts search-relevant information (metadata) from the compressed audio-visual data and stores it separately in an uncompressed format. This extraction allows the metadata to be independently edited, searched, and reused without requiring decomposition of the compressed video stream, resolving the contradiction between storage efficiency and data reusability.
Data Source
AI summary
A storage medium including metadata, which provide an extended search function using a variety of search keywords on audio-visual data, and a reproduction apparatus and a reproduction method of reproducing the storage medium. The storage medium includes: audio-visual data; and metadata to provide an extended search function on the audio-visual data, wherein the metadata include a predefined search keyword and a search keyword which may be additionally defined by an author. Accordingly, by using a variety of search keywords additionally defined by an author as well as predefined search keywords, providing an extended search function is possible. In addition, by recording only portions of the metadata relative directly to supporting multiple languages in an additional text-based file, providing an extended search function using a plurality of languages is also possible.