Unified Display Stream Format for SST and MST Modes

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Solution Overview

Problem

Existing display stream protocols require different formatting for single stream transport (SST) and multi-stream transport (MST) modes, resulting in significant overhead due to the use of packet headers, which complicates communication and increases processing requirements.

Innovation Solution

Eliminating the packet header in both SST and MST modes by incorporating link-layer control information into the display stream, using encoded packets such as 128b-132b encoding, and inserting link-layer control protocol packets at fixed intervals to manage control information, allowing for a unified display stream format compatible with both modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If packet headers are used in MST mode to provide link-layer control information, then control information can be communicated, but overhead increases by about 1.5% per packet

Engineering Contradiction:

Improvecontrol information communicationVSAvoidpacket overhead

Core Design Contradiction:

Loss of informationVSLoss of energy

Solution Approach 1:

The patent extracts the packet header from the data stream and replaces it with link-layer control packets inserted at fixed intervals. This removes the continuous overhead of headers while maintaining necessary control information communication through periodic control packets that carry link-layer management data.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Instead of using headers in every packet, the patent implements periodic insertion of link-layer control packets at fixed intervals within the data stream. This periodic approach reduces overall overhead while ensuring control information is communicated at appropriate intervals to maintain link functionality.

Inventive Principle:

Principle #19Periodic action

2Adaptability or versatility

If different formatting is used for SST and MST modes, then each mode can be optimized, but device complexity increases

Engineering Contradiction:

Improvemode-specific optimizationVSAvoidformatting complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent creates a universal packet structure that can function in both SST and MST modes without requiring separate formatting logic. The link-layer control packets are inserted at fixed intervals regardless of the transport mode, providing a single unified formatting approach that adapts to different operational modes while maintaining simplicity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If packet headers are used to communicate link-layer control information, then control functions are maintained, but processing requirements increase

Engineering Contradiction:

Improvelink-layer control functionVSAvoidprocessing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent removes the header from each data packet and extracts link-layer control information into separate control packets inserted at fixed intervals. This extraction reduces the processing burden on each individual data packet while maintaining all necessary link-layer control functions through the dedicated control packets.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11005907B2Single stream format for multiple display modes

Publication Date: 2021.05.11 INTEL CORP

AI summary

Disclosed herein are techniques to provide a unified display stream for multiple modes of a display specification. The display stream can include a link layer control protocol packet comprising link control information inserted between a set number of packets comprising display data. A packet can comprise indications of display data for a single stream or multiple streams.