Reference Signal Insertion for Stereoscopic Video Identification

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Solution Overview

Problem

Current digital video signal processing technologies face challenges in identifying and differentiating video signals for stereoscopic and multi-view applications, particularly in synchronizing shutter glasses with coded video signals to provide appropriate perspectives to viewers.

Innovation Solution

A method is introduced that involves inserting a sequence of reference signals into the video stream, allowing for the identification and differentiation of video signals by their profiles, which are detected and used to decode the appropriate images for each viewer's perspective using a decoding device with processors managing power and shutter control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If reference signals are inserted into the video stream to enable identification and differentiation of video signals for stereoscopic and multi-view applications, then the ability to identify and decode appropriate images for each viewer's perspective is improved, but the complexity of the video signal processing system increases

Engineering Contradiction:

Improveidentification accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

Reference signals are inserted into the video stream in advance at known positions (e.g., before or after video frames) to enable subsequent identification and synchronization. This preliminary action allows the decoding device to detect these reference signals and use them to identify different video streams (left eye, right eye, multiple views) without requiring complex real-time analysis

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Reference signals act as intermediary markers between the video content and the synchronization system. These signals carry identification information that mediates the connection between the displayed video frames and the shutter glasses, enabling the shutter control unit to correctly synchronize with different video streams without direct complex interaction

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If multiple video streams for different perspectives are mixed and processed as a combined video stream, then the efficiency of signal delivery is improved, but the difficulty of identifying and differentiating individual video signals increases

Engineering Contradiction:

Improvesignal delivery efficiencyVSAvoidsignal identification difficulty

Core Design Contradiction:

ProductivityVSDifficulty of detecting and measuring

Solution Approach 1:

The combined video stream is segmented into distinct components (left eye video frames, right eye video frames, or multiple view frames) separated by reference signals. This segmentation allows the decoding device to identify and process each video stream independently while maintaining the efficiency of combined signal delivery through the unified stream structure

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Reference signals introduce distinct visual markers (analogous to color changes) that differentiate between various video streams within the combined stream. These markers enable the decoding device to detect and identify different perspective views without requiring complex signal analysis, maintaining both efficiency and identifiability

Inventive Principle:

Principle #32Color changes

3Reliability

If reference signals with profiles are inserted to enable video signal identification, then the synchronization accuracy between shutter glasses and video signals is improved, but the amount of additional data in the video stream increases

Engineering Contradiction:

Improvesynchronization reliabilityVSAvoiddata volume

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Rather than embedding identification information in every video frame, reference signals are inserted periodically at specific positions (e.g., before or after frames) to provide sufficient synchronization information. This partial action approach maintains reliable synchronization while minimizing the additional data volume compared to per-frame encoding

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS8237779B2Coding scheme for digital video signals and an image architecture using the same

Publication Date: 2012.08.07 TEXAS INSTRUMENTS INC

AI summary

Video signals in a video stream are encoded by inserting reference signals in the video stream such that the encoded video stream carry both reference signals and video signals being coded. In the decoding stage, reference images generated from the reference signals are detected and used for identifying the encoded video signals based upon the profiles of the detected reference images. An imaging architecture capable of using the coding scheme comprises a shutter that can be implemented as a dual-processor configuration.