Super-Resolution Control via HDMI-CEC Capability Exchange
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Solution Overview
Problem
Existing video display apparatuses with super-resolution functions, when combined with video playback devices, often apply super-resolution conversion processing doubly, leading to video quality deterioration due to noise and over-emphasis of edges.
Innovation Solution
Implementing a control mechanism in video display apparatuses and video playback apparatuses to ensure only one device executes super-resolution conversion processing by exchanging control signals via HDMI-CEC, allowing either the video display apparatus or the video playback apparatus to disable super-resolution processing based on notifications of each other's capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If super-resolution conversion processing is applied in both video display apparatus and video playback apparatus, then high-resolution video output is achieved, but video quality deteriorates due to noise and over-emphasis of edges
Solution Approach 1:
The video playback apparatus transmits capability information to the video display apparatus, and the video display apparatus transmits control signals back to the video playback apparatus to disable super-resolution processing when both devices have the capability. This feedback mechanism ensures that super-resolution processing is applied only once in the signal chain, preventing noise and edge over-emphasis while maintaining high-resolution output.
Solution Approach 2:
The system performs preliminary capability exchange between the video display apparatus and video playback apparatus before video playback begins. By determining in advance which device will perform super-resolution processing based on their capabilities, the system prevents double application of the processing and avoids video quality deterioration.
2Manufacturing precision
If super-resolution conversion processing is applied in both video display apparatus and video playback apparatus, then high-resolution video output is achieved, but device complexity increases
Solution Approach 1:
The control signal transmission mechanism uses existing HDMI-CEC infrastructure to serve dual purposes: both device control and capability information exchange. This universal approach allows the system to manage super-resolution processing without adding dedicated complex control hardware, thereby limiting the increase in device complexity.
3Reliability
If control signal transmission is implemented between video display apparatus and video playback apparatus, then super-resolution processing is controlled properly, but communication overhead increases
Solution Approach 1:
The capability information exchange and control signal transmission occur in advance before video playback begins. By performing this communication preliminarily, the system ensures reliable super-resolution control without causing noticeable delays during actual video playback, as the control decisions are already made.
Data Source
AI summary
According to one embodiment, a video display apparatus includes a video reception module, a resolution processing module, and a notification module. The video reception module receives a video signal of a first resolution from an external apparatus. The resolution processing module generates a video signal of a second resolution higher than the first resolution by creating new pixel values from the video signal of the first resolution. The notification module transmits a notification indicating that the video display apparatus comprises the resolution processing module to the external apparatus.