Source Device Multistream Signal Tiling for Daisy-Chain Sink Devices
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Solution Overview
Problem
Existing HDMI multistream signal transmission systems face challenges in correctly performing tiling displays across multiple sink devices due to varying device locations, leading to inconsistent display outcomes.
Innovation Solution
A source device generates a multistream signal that associates daisy chain stage numbers with content streams, allowing each sink device to correctly receive and display video signals by reading and reporting display capabilities through an HDMI cable, enabling accurate tiling patterns and locations to be set and transmitted across daisy-chained devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multistream signal transmission is implemented across multiple sink devices, then the quantity of displayed content increases, but tiling display accuracy deteriorates due to varying device locations
Solution Approach 1:
The source device performs preliminary actions by reading and storing display capability information (resolution, aspect ratio, tiling pattern) of all sink devices before generating the multistream signal. This advance preparation allows the source device to pre-calculate and embed stage number information and tiling parameters into each video stream, ensuring that when signals are transmitted to daisy-chained sink devices, each device can correctly identify its position and render the appropriate portion of the overall display without real-time negotiation or adjustment.
2Adaptability or versatility
If daisy-chained sink devices are used for multistream transmission, then device connectivity flexibility improves, but display consistency deteriorates across different device locations
Solution Approach 1:
The system implements feedback by having each sink device report its display capability information (resolution, aspect ratio, supported tiling patterns) back to the source device through the daisy-chain connection. The source device uses this feedback to generate and customize multistream signals with appropriate stage number information and tiling parameters for each specific device configuration, ensuring display consistency regardless of which devices are connected or in what order.
Solution Approach 2:
The invention changes parameters by dynamically adjusting the multistream signal parameters (stage number, tiling pattern, resolution allocation) based on the specific configuration of connected sink devices. Each video stream is generated with customized parameters that reflect the actual capabilities and positions of the daisy-chained devices, allowing the system to maintain display consistency across various connectivity configurations without requiring fixed device arrangements.
3Area of stationary object
If tiling display is performed in multiple sink devices, then display area expands, but tiling correctness deteriorates depending on device locations
Solution Approach 1:
The source device performs preliminary actions by reading and storing display capability information (resolution, aspect ratio, tiling pattern) of all sink devices before generating the multistream signal. This advance preparation allows the source device to pre-calculate and embed stage number information and tiling parameters into each video stream, ensuring that when signals are transmitted to daisy-chained sink devices, each device can correctly identify its position and render the appropriate portion of the overall display without real-time negotiation or adjustment.
Solution Approach 2:
The invention segments the overall display content into multiple independent video streams, with each stream designated for a specific sink device based on its position in the daisy-chain. The source device divides the total display area into discrete segments corresponding to each device's physical characteristics and assigns appropriate content portions to each segment, allowing the system to expand total display area across multiple devices while maintaining tiling correctness through systematic content segmentation.
Data Source
AI summary
According to one embodiment, a source device generates a multistream signal transmitted to a plurality of sink devices which are connected by daisy-chaining and generates the multistream signal by associating daisy chain stage numbers of the sink devices with contents streams for the sink devices.