Panoramic Video Viewing Angle Prediction With Invalid Head-Turn Filtering

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Solution Overview

Problem

Existing VR headset systems inaccurately predict viewing angles due to large head turning amplitudes caused by non-video factors, leading to reduced accuracy in bandwidth management for panoramic videos.

Innovation Solution

A method and apparatus that determine a current predicted viewing angle based on user head movement, identify invalid head turning actions, and correct the prediction using a target candidate viewing angle set to ensure accuracy, thereby reducing deviations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of energy

If viewing angle prediction is performed based on full viewing angle using head movement trajectory, then the system can predict future viewing angles for bandwidth reduction, but large head turning amplitudes due to non-video factors cause large deviations in predicted viewing angle, reducing prediction accuracy

Engineering Contradiction:

Improvetransmission bandwidthVSAvoidviewing angle prediction accuracy

Core Design Contradiction:

Loss of energyVSMeasurement precision

Solution Approach 1:

The patent extracts and removes invalid head turning actions (caused by non-video factors) from the head movement trajectory before performing viewing angle prediction. By filtering out these abnormal movements, the system maintains bandwidth efficiency while improving prediction accuracy, resolving the contradiction between bandwidth reduction and prediction precision.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces a feedback mechanism that detects invalid head turning actions and adjusts the prediction model accordingly. When abnormal head movements are detected, the system identifies and excludes these actions from the trajectory data, providing feedback to improve subsequent prediction accuracy while maintaining bandwidth optimization.

Inventive Principle:

Principle #23Feedback

2Loss of energy

If the system downloads video streams at predicted viewing angles to reduce transmission bandwidth, then bandwidth usage is optimized, but inaccurate prediction due to invalid head turning actions leads to wrong video stream selection

Engineering Contradiction:

Improvetransmission bandwidthVSAvoidvideo stream selection accuracy

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent extracts invalid head turning actions from the head movement trajectory, removing noise that would otherwise cause incorrect video stream selection. This ensures that bandwidth optimization through predictive downloading does not compromise the reliability of selecting the correct video streams.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent introduces an intermediary validation step between head movement detection and video stream selection. This intermediary process identifies and filters invalid head turning actions, acting as a mediator that ensures only valid trajectory data influences video stream selection, thereby maintaining both bandwidth efficiency and selection accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the system uses all head movement data for prediction, then the prediction model has sufficient data for bandwidth optimization, but non-video factors introduce noise that reduces prediction precision

Engineering Contradiction:

Improveprediction processing efficiencyVSAvoidviewing angle prediction accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent extracts and removes invalid head turning actions from the complete head movement trajectory, separating useful prediction data from noisy non-video factors. This extraction process maintains sufficient data volume for efficient processing while eliminating noise that degrades prediction precision.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies partial action by selectively using only the valid portion of head movement trajectory data for prediction, rather than processing all data equally. This approach maintains processing efficiency by avoiding unnecessary computation on invalid data points while ensuring prediction accuracy through selective data utilization.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250370534A1Viewing angle prediction method, device, and storage medium

Publication Date: 2025.12.04 DOUYIN VISION CO LTD

AI summary

A viewing angle prediction method, including determining a current predicted viewing angle corresponding to a current to-be-downloaded clip in a panoramic video based on a head movement trajectory of a user viewing the panoramic video (S110); acquiring a target candidate viewing angle set corresponding to said current to-be-downloaded clip in response to detecting that a current head turning action in the head movement trajectory is an invalid action (S120); and performing correction processing on the current predicted viewing angle, and determining a target predicted viewing angle corresponding to said current to-be-downloaded clip, based on the target candidate viewing angle set (S130).