Accessory Authentication Logic for HDMI Noise Mitigation
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Solution Overview
Problem
Wireless communication devices experience desensitization due to HDMI-related noise radiation from connectors and cables, which conventional bulky and rigid shielding solutions fail to adequately address, leading to limited noise reduction and aesthetically unpleasant product designs.
Innovation Solution
A method and system that dynamically configures operating parameters of connected accessories using Accessory Authentication and Configuration logic to mitigate harmonic interference, selecting candidate values for parameters like drive signal level and frequency to minimize noise within the wireless communication device's operating frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If bulky, multilayer and rigid shielded connector and cable are used, then noise radiation from HDMI connector and cable is reduced, but device size increases and product design becomes inflexible
Solution Approach 1:
The patent replaces physical mechanical shielding structures (bulky, multilayer, rigid shields and cans) with an electronic/software-based solution that dynamically configures operating parameters of connected accessories. This substitution eliminates the need for large physical barriers while achieving noise reduction through parameter optimization.
Solution Approach 2:
The patent dynamically changes operating parameters (such as drive signal level, frequency, and other configurable parameters) of the HDMI connector and cable based on detected conditions. By adjusting these parameters, the system reduces noise radiation without requiring increased device size or rigid structural modifications.
2Object-affected harmful factors
If bulky, multilayer and rigid shielded connector and cable are used, then noise radiation from HDMI connector and cable is reduced, but product aesthetics deteriorate
Solution Approach 1:
The patent replaces visible mechanical shielding components (rigid shields, multilayer structures, and cans) with an invisible electronic parameter configuration system. This allows the product to maintain its original aesthetic design without adding bulky protective structures.
3Object-affected harmful factors
If conventional shielding approaches are used, then some noise reduction is achieved, but wireless communication performance remains limited
Solution Approach 1:
The patent implements a feedback mechanism where the wireless communication device detects operating parameters of connected accessories and dynamically adjusts configuration settings based on detected noise conditions. This closed-loop approach continuously optimizes wireless communication performance by adapting to changing electromagnetic environments.
Solution Approach 2:
The patent transitions from static physical shielding to dynamic parameter configuration. The operating parameters of the HDMI connector and cable are continuously adjusted based on real-time detection, allowing the system to adapt to varying noise conditions and maintain optimal wireless communication performance.
Data Source
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AI summary
A method and system configures operating parameters associated with an operation of a connected accessory or second device in order to mitigate harmonic interference within an operating frequency band of a wireless communication device (WCD). In response to a connection between the WCD and the second device via a physical communications interface, Accessory Authentication and Configuration (AAC) logic of the WCD receives device identifying information about the second device. The AAC logic determines candidate values for each operating parameter, based on the device identifying information. The AAC logic dynamically selects a particular candidate value for each operating parameter, based on a current operating frequency band of the WCD, and an expected level of harmonic interference. The AAC logic automatically configures each operating parameter with the corresponding selected candidate value to enable proper operation of the second device while mitigating harmonic interference within the operating frequency band of the WCD.