Recording Medium I-Picture Detection in Multiplexed Video Streams
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Solution Overview
Problem
Existing recording media technologies face challenges in quickly locating data for displaying images from multiple streams on a disc, leading to increased storage needs and costs due to the requirement for extensive information tables for each stream, especially when multiple video streams are multiplexed.
Innovation Solution
A recording medium that records information for identifying I-pictures in multiple video streams within a single stream, allowing for rapid detection of I-pictures using reduced information, thereby minimizing storage needs and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If extensive information tables are recorded for each stream to enable quick location of I-pictures, then detection speed of I-pictures is improved, but storage requirements increase
Solution Approach 1:
The patent merges the detection information for multiple video streams into a single unified information table. Instead of maintaining separate EP_Map tables for each stream, the invention combines them into one table that contains detection information for all streams, thereby reducing overall storage requirements while maintaining quick detection capability for I-pictures across multiple streams
Solution Approach 2:
The information table is designed to serve multiple video streams simultaneously with a single unified structure. The table contains detection information that can be applied universally across different streams, allowing the same table to facilitate quick I-picture detection for any stream without requiring stream-specific duplicate tables
2Measurement precision
If separate information tables are maintained for multiple video streams, then detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple separate information tables into a single unified table, reducing device complexity by eliminating the need to manage multiple separate data structures. The unified table simplifies information management while maintaining detection accuracy through a standardized format that can accurately identify I-pictures across all streams
Solution Approach 2:
The invention applies a homogeneous information structure that uniformly handles detection information for all video streams. By using a consistent table format and detection methodology across all streams, the system maintains detection accuracy while reducing complexity through standardized, uniform information management
Data Source
AI summary
In a recording medium on which is recorded a multiplexed stream including a plurality of first packets (V_main) constituting a first I-picture in a first video stream and a plurality of second packets (V_sub) constituting a second I-picture in a second video stream, information for identifying the first I-picture and information for identifying the second I-picture are recorded on the medium. A recording medium can thereby be obtained that enables the rapid detection, from a small amount of information, of a particular picture included in a stream such as a TS in which multiple content streams are multiplexed.