MMT Format Stream File Generation for BDAV Compatibility

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Solution Overview

Problem

Current systems cannot effectively record and reproduce MPEG media transport (MMT) format data using BDAV format-compatible applications, as the existing BDAV format is designed for MPEG-2 TS format data, leading to compatibility issues and inability to use MMT format data with BDAV-compatible reproducing applications.

Innovation Solution

An information processing device and method that generates and uses MMT format stream files and compatible reproduction control information files, allowing for recording and reproduction of MMT format data in BDAV or SPAV formats, enabling seamless playback with BDAV format-compatible applications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If MMT format data is recorded in a medium without conversion, then data quality is preserved, but BDAV-compatible reproducing applications cannot reproduce the content

Engineering Contradiction:

Improvedata qualityVSAvoidcompatibility with BDAV-compatible reproducing applications

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent introduces an MMT format stream file and MMT format-compatible reproduction control information file as intermediary components that enable BDAV-compatible reproducing applications to access and reproduce MMT format data. The reproduction control information file acts as a mediator between the MMT format data and the BDAV-compatible application, providing necessary control information without requiring format conversion.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If MMT format data is converted to MPEG-2 TS format for recording, then compatibility with BDAV applications is achieved, but data quality may be degraded

Engineering Contradiction:

Improvecompatibility with BDAV applicationsVSAvoiddata quality

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent creates a copy of the MMT format data structure through the MMT format stream file and reproduction control information file, allowing BDAV-compatible applications to access the data without requiring format conversion. This copying approach preserves the original MMT format data quality while providing compatibility through the control information file.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS11259074B2Information processing device, and information processing method, and program

Publication Date: 2022.02.22 SONY GROUP CORP

AI summary

A configuration capable of recording MMT format data in a medium as BDAV or SPAV format data and enabling the MMT format data to be reproduced is realized. MMT format data input via a broadcast wave or the like is input, and record data according to a BDAV format or an SPAV format is generated. A data processing unit generates an MMT format stream file storing the MMT format data as reproduction data and further generates a playlist file storing reproduction control information of the MMT format stream file and a clip information file.