MPEG-TS to MPEG-PS Conversion via Capsule Grouping

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Solution Overview

Problem

Current methods for converting MPEG-TS to MPEG-PS format are time-consuming and degrade image and sound quality, and lack seamless connection points for continuous playback.

Innovation Solution

An information recording medium and apparatus that encodes video and audio information into a system stream with a constrained format, allowing conversion from MPEG-TS to MPEG-PS while maintaining seamless playback by grouping packets into multiplexing units and using management information for playback sequence and connection details.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If MPEG-TS to MPEG-PS conversion is performed using conventional methods, then format conversion is achieved, but conversion time increases and image/sound quality degrades

Engineering Contradiction:

Improveformat conversion capabilityVSAvoidconversion time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-grouping TS packets into multiplexing units with complete Capsule structures during recording. This preprocessing ensures that conversion to MPEG-PS can be performed rapidly by simply reorganizing existing grouped packets rather than performing complex recalculation from individual packets, thereby reducing conversion time while maintaining quality

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent segments the MPEG-TS stream into discrete multiplexing units (Capsules) that are self-contained and independently convertible to MPEG-PS packs. This segmentation allows the conversion process to operate on smaller, pre-organized units rather than the entire stream, significantly improving conversion speed and enabling parallel processing

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If complex recalculation for decoder buffer management is performed during TS2PS conversion, then conversion accuracy is improved, but conversion speed decreases

Engineering Contradiction:

Improveconversion accuracyVSAvoidconversion speed

Core Design Contradiction:

Manufacturing precisionVSProductivity

Solution Approach 1:

The patent performs preliminary organization of TS packets into multiplexing units with proper Capsule boundaries and metadata during the recording phase. This preliminary structuring eliminates the need for complex buffer management recalculation during conversion, as the conversion process only needs to copy and repackage already-organized units, thereby achieving both high accuracy and high speed

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If re-encoding is performed during TS2PS conversion, then format compatibility is improved, but image and sound quality degrade

Engineering Contradiction:

Improveformat compatibilityVSAvoidimage and sound quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent extracts the elementary streams (video and audio) from the MPEG-TS container format and directly maps them into the MPEG-PS container format without re-encoding. By separating the container format conversion from the elementary stream data, the patent achieves format compatibility while preserving the original encoded quality of the video and audio content

Inventive Principle:

Principle #2Taking out (Extraction)

4Ease of manufacture

If seamless connection points are not properly managed during conversion, then conversion simplicity is maintained, but continuous playback capability is lost

Engineering Contradiction:

Improveconversion simplicityVSAvoidseamless playback capability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies preliminary action by marking seamless connection points and organizing TS packets around these points into complete Capsule structures during recording. This ensures that during conversion, the seamless connection information is already embedded in the multiplexing unit boundaries, allowing simple copy operations to preserve continuous playback capability without complex analysis during conversion

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8000585B2Information recording medium wherein stream convertible at high-speed is recorded, and recording apparatus and recording method therefor

Publication Date: 2011.08.16 PANASONIC HOLDINGS CORP

AI summary

An information recording medium capable of converting a stream including seamless connection, which is recorded in a constrained format allowing format conversion, from a first format (MPEG-TS) to a second format (MPEG-PS), into a second stream, and an apparatus and method for recording information in the information recording medium. The constrained format is provided for enabling conversion from a first format (for example, MPEG transport stream) to a second format (for example, MPEG program stream). According to the constrained format, when the connection information of the playback portion indicates a seamless playback, the system stream immediately before a seamless connection point ends with a complete data management unit (Capsule).