Playback Device 3D Video Offset Metadata Processing

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Solution Overview

Problem

The existing methods for playing back 3D video content on recording media face challenges in efficiently processing graphics streams and offset information, leading to potential delays and increased memory requirements due to the need for large memory capacity to store separate files for graphics and offset data, which hinders the reduction of memory capacity and synchronization with frame periods.

Innovation Solution

A recording medium that integrates main-view and sub-view video streams with metadata containing offset information, allowing for the extraction of offset control data within groups of pictures (GOPs), enabling separate processing of graphics and video streams without varying data structures, and using transport stream (TS) packets with priority flags to differentiate metadata and picture packets for efficient decoding.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If separate files are used for graphics streams and offset information, then the data can be processed independently, but the memory capacity increases and synchronization with frame periods becomes difficult

Engineering Contradiction:

ImproveIndependent processing capabilityVSAvoidMemory capacity

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

The patent combines graphics stream data and offset information into a single integrated file structure. The offset information is embedded within the graphics stream data, allowing both to be processed together while reducing memory requirements. This merging eliminates the need for separate storage of graphics and offset data, directly addressing the memory capacity issue while maintaining independent processing capability through structured data organization.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated file structure serves multiple functions simultaneously: it stores both graphics stream data and offset information, enables independent processing of each component, and ensures synchronization with frame periods through unified data management. This multi-functional design resolves the contradiction by making a single file structure capable of handling all requirements that previously needed separate files.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If large memory capacity is allocated to store separate files for graphics and offset data, then complete data can be stored, but the memory capacity cannot be reduced and synchronization with frame periods becomes hindered

Engineering Contradiction:

ImproveData completenessVSAvoidMemory capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

By merging graphics stream and offset information into a single file, the patent reduces memory capacity requirements while maintaining data completeness. The integrated structure ensures all necessary data is available for reliable processing without requiring large separate storage allocations, directly resolving the contradiction between data completeness and memory capacity.

Inventive Principle:

Principle #5Merging (Combining)

3Ease of manufacture

If separate files are used for graphics stream and offset information, then data processing can be independent, but the device complexity increases

Engineering Contradiction:

ImproveIndependent processingVSAvoidFile structure complexity

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent reduces device complexity by merging graphics and offset data into a single file structure with clear internal organization. This eliminates the need for complex file management systems that would handle multiple separate files, while still allowing independent processing of graphics stream and offset information through structured data access methods.

Inventive Principle:

Principle #5Merging (Combining)

4Ease of operation

If offset information is stored separately from video stream, then it can be extracted independently, but the memory requirements increase and synchronization becomes difficult

Engineering Contradiction:

ImproveIndependent extractionVSAvoidMemory requirements

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent embeds offset information within the video stream file structure, allowing independent extraction through targeted data access while reducing memory requirements. The integrated structure enables efficient retrieval of offset information without requiring separate file storage, directly resolving the contradiction between independent extraction capability and memory requirements.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2453661B1Playback device, recording method, and system comprising a recording medium and a playback device

Publication Date: 2017.08.30 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

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Figure 3A~3B

AI summary

A pair of main-view and sub-view video streams and a graphics stream are recorded on a BD-ROM disc. M etadata is provided in each GOP in the sub-view video stream. The metadata includes offset information. The offset information specifies offset control for a plurality of pictures constituting a GOP. Offset control is to provide a left offset and right offset for the horizontal coordinates in a graphics plane to generate a pair of graphics planes, and to combine them separately with main-view and sub-view video planes. The sub-view video stream is packetized and multiplexed in a transport stream. A header of each TS packet includes a TS priority flag. TS packets containing the metadata have a different value of TS priority flag from TS packets containing sub-view pictures.