Tile-Based Video Streaming Encryption for Platform Compatibility

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Solution Overview

Problem

Existing encryption schemes for tile-based video streaming systems are inefficient and incompatible across different platforms, leading to complex MPD sizes and DRM issues, especially when dealing with omnidirectional video of varying quality.

Innovation Solution

Implement a client-side understanding of ROI and relative quality ranking through a manifest file that defines preselection adaptation sets, using picture-portion specific parameters and quality hints to optimize encryption and decryption processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing encryption schemes are used for tile-based video streaming, then content protection is achieved, but platform compatibility is reduced and MPD complexity increases

Engineering Contradiction:

Improvecontent protectionVSAvoidplatform compatibility

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The video content is divided into tiles that can be independently encrypted and transmitted. Each tile can be processed separately, allowing different encryption schemes to be applied to different tiles based on platform requirements, thus maintaining content protection while improving platform compatibility

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the video (tiles) can have different quality levels and encryption schemes applied. High-priority tiles can use more robust encryption while lower-priority tiles use simpler schemes, optimizing both security and compatibility across platforms

Inventive Principle:

Principle #3Local quality

2Reliability

If existing encryption schemes are used for tile-based video streaming, then content protection is achieved, but processing efficiency is reduced

Engineering Contradiction:

Improvecontent protectionVSAvoidprocessing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

By segmenting the video into tiles with independent encryption, the system can process and encrypt only the necessary tiles rather than the entire video stream, improving processing efficiency while maintaining content protection

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system applies encryption selectively to only the portions of video content that require protection, rather than encrypting the entire stream uniformly, thus reducing overall processing overhead while maintaining security

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If quality levels are indicated for each region without common scaling, then regional quality differentiation is achieved, but quality comparison across regions becomes difficult

Engineering Contradiction:

Improveregional quality differentiationVSAvoidquality comparison accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The system introduces a common quality scale that acts as a reference level, allowing all regional quality indicators to be measured against the same standard. This enables accurate quality comparison across different regions while maintaining the ability to differentiate quality levels

Inventive Principle:

Principle #12Equipotentiality

Data Source

PatentEP3649789B1Portioned video streaming concepts

Publication Date: 2025.10.29 FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG EV

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AI summary

Portion- or tile-based video streaming concepts are decribed.