Blu-ray Base Stream Encoding for Multi-View Compatibility

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Solution Overview

Problem

The existing BD standard does not define how to record or play back image data of stereoscopic images, specifically stereo images, which consist of two data streams, making it difficult to playback in standard BD players.

Innovation Solution

A method to encode video data of multiple viewpoints using a predetermined encoding method, where a stream of base image is created without a data header and a stream of extended image with a data header, allowing playback in devices incompatible with multiple viewpoint video data by decoding the base image before the extended image.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If video data of multiple viewpoints is encoded and stored on a BD, then stereoscopic image playback is enabled, but compatibility with standard BD players is lost

Engineering Contradiction:

Improvestereoscopic image playback capabilityVSAvoidcompatibility with standard BD players

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The video data is segmented into two separate streams: a base image stream containing common information and an extended image stream containing additional viewpoint data. This segmentation allows standard players to use only the base stream while advanced players can utilize both streams for stereoscopic playback

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The base image stream is designed to be universally compatible with all BD players, while the extended image stream provides additional functionality for stereoscopic-capable players. This multi-functionality enables the same BD to work with both standard and advanced playback devices

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If two data streams (left image and right image) are recorded on a BD, then stereo image playback is achieved, but playback in existing BD players becomes impossible

Engineering Contradiction:

Improvestereo image playback capabilityVSAvoidplayback compatibility

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The left and right image data streams are merged into a single base image stream that contains common information, reducing the number of separate streams needed and enabling playback on devices that cannot handle multiple viewpoint streams

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The base image stream acts as an intermediary that bridges between standard BD players and stereoscopic playback requirements, providing a compatible interface that all players can understand while enabling advanced functionality when combined with the extended image stream

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2285127B1Recording device, recording method, reproduction device, reproduction method, recording medium, and program

Publication Date: 2014.11.19 SONY GROUP CORP

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AI summary

The present invention relates to a recording device, a recording method, a playback device, a playback method, a recording medium, and a program that enable a recording medium, such as a BD, storing a stream of base image and a stream of extended image obtained by encoding video data of a plurality of viewpoints using a predetermined encoding method to be played in a device incompatible with playback of video data of a plurality of viewpoints. In an Access Unit storing Base view video, encoding of an MVC header is prohibited. As for a view component stored in an Access Unit without an MVC header, definition is made so that view_id thereof is recognized as 0. The present invention can be applied to a playback device compatible with the BD-ROM standard.