Video Signal Conversion Device HDR to SDR Compatibility
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Solution Overview
Problem
Existing video transmitting devices often fail to support high dynamic range (HDR) video formats at the backend receiving end, leading to color anomalies when the frontend device outputs HDR signals that the backend cannot handle.
Innovation Solution
A video signal conversion device is introduced, comprising a frontend circuit, an FPGA video processor, and a backend circuit with a video bridge controller, which converts HDR input signals into standard dynamic range (SDR) signals, enabling compatibility with backend devices that may not support HDR, using a PCI-E BUS or USB interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the video transmitting device outputs HDR signals, then the video quality is improved, but the compatibility with backend devices is worsened when they do not support HDR format
Solution Approach 1:
The patent introduces an HDR-SDR conversion device as an intermediary component between the HDR video transmitting device and the non-HDR backend receiving device. This conversion device receives HDR video signals from the transmitting device, performs HDR to SDR conversion, and outputs compatible SDR signals to the backend device. The intermediary device enables seamless integration between HDR and non-HDR systems without requiring changes to the original transmitting or receiving devices.
Solution Approach 2:
The conversion device changes the signal format parameter from HDR to SDR dynamically. It detects whether the backend device supports HDR format and automatically adjusts the output signal type accordingly - outputting HDR signals when the backend supports it, and converting to SDR signals when the backend does not support HDR. This parameter adaptation resolves the contradiction between maintaining high video quality and ensuring broad compatibility.
2Adaptability or versatility
If the backend device does not support HDR format, then the compatibility is improved, but the video quality is worsened due to color anomalies
Solution Approach 1:
The patent converts the limitation of non-HDR backend devices into a beneficial solution by implementing automatic format detection and conversion. When the backend device cannot support HDR format, the conversion device automatically transforms the HDR signal into SDR format, preventing color anomalies and ensuring proper video display. This approach turns the potential harm of format incompatibility into a benefit by maintaining video quality through adaptive conversion.
3Adaptability or versatility
If the video signal conversion device is added, then the compatibility is improved, but the device complexity is worsened
Solution Approach 1:
The patent extracts the HDR-SDR conversion function into a separate, independent device rather than integrating it into the existing video transmitting or receiving devices. This extraction allows the conversion functionality to be added without modifying the original devices, maintaining their existing designs while enabling HDR compatibility. The standalone conversion device simplifies the overall system architecture by creating a clear functional separation.
Data Source
AI summary
A video signal conversion device includes a frontend interface circuit, a FPGA video processor and a backend interface circuit. The frontend interface circuit receives a HDR video input signal from a video transmitting device. The FPGA video processor outputs a SDR first video output signal. A video receiving device receives the first video output signal and a HDR second video output signal from the FPGA video processor through the video bridge controller of the backend interface circuit by PCI-E.