Spread-Spectrum Video Transport Over Imperfect Vehicle Cabling

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Solution Overview

Problem

Infrastructure video systems face challenges in conveying video signals over imperfect electromagnetic pathways due to propagation errors, which introduce visually disturbing artifacts, limiting fidelity and increasing installation costs.

Innovation Solution

An LST method using Spread Spectrum Direct Sequence-Code Division Multiple Access (SSDS-CDMA) to encode and decode sampled payload signals, transforming propagation errors into perceptually benign white noise, allowing faithful signal reconstruction despite imperfect EM pathways.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If video signals are transmitted over imperfect electromagnetic pathways using conventional methods, then installation costs increase and fidelity decreases, but propagation errors introduce visually disturbing artifacts

Engineering Contradiction:

Improvesignal fidelityVSAvoidvisually disturbing artifacts

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies spread spectrum modulation to transform the harmful effect of propagation errors into beneficial white noise characteristics. By spreading the video signal spectrum and using code division multiple access, the system converts distortion-prone narrowband transmission into robust wideband transmission where errors manifest as perceptually benign white noise rather than visible artifacts

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The system changes the spectral parameters of the video signal by modulating it with high-frequency pseudorandom codes. This spectral spreading transforms the signal from a conventional narrowband representation to a wideband representation, fundamentally altering how propagation errors affect the transmitted video data and enabling error resilience

Inventive Principle:

Principle #35Parameter changes

2Reliability

If high-fidelity video transmission is achieved over diverse EM pathways, then system complexity increases, but legacy cabling can be reused to reduce installation costs

Engineering Contradiction:

Improvesignal fidelityVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent creates a universal video transmission system that can operate over diverse electromagnetic pathways including legacy cabling. The spread spectrum CDMA architecture provides multi-functionality by enabling simultaneous support for different cable types, impedance variations, and pathway conditions through its inherent robustness to channel variations

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system introduces spread spectrum modulation as an intermediary layer between the video source and the transmission medium. This intermediary processing transforms conventional video signals into a format that is inherently more resilient to the imperfections of diverse electromagnetic pathways, including legacy cabling, without requiring complex equalization or adaptation circuits

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of manufacture

If conventional video transmission methods are used, then implementation is simpler, but propagation errors limit fidelity and increase installation costs

Engineering Contradiction:

Improveimplementation simplicityVSAvoidsignal fidelity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces conventional narrowband modulation mechanisms with spread spectrum modulation mechanisms. Instead of using traditional frequency or amplitude modulation that is sensitive to propagation errors, the system uses direct sequence spread spectrum with pseudorandom coding, fundamentally substituting the transmission mechanism to achieve error resilience

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS20260074739A1Spread spectrum video transport and sampled analog video transport in a vehicle

Publication Date: 2026.03.12 HYPHY USA INC

AI summary

Infrastructure electronics equipment incorporates infrastructure Local-Site Transports (LSTs). LSTs convey payload sampled signals over imperfect electromagnetic (EM) pathways whose physical properties are usually unknown when the equipment (e.g., Cameras, Displays, Set-Top Boxes) is manufactured. Prior LSTs hedge against EM pathway degradation in several ways: requiring high-quality cables (e.g., HDMI); restricting transmission distance, (e.g., HDMI); and/or reducing quality, via compression, to extend transmission distance somewhat (e.g., Ethernet). The subject of this disclosure is an infrastructure LST for sampled signals that causes the physical errors inevitably arising from propagation of sensory payloads over imperfect EM pathways to manifest in a perceptually benign manner, leveraging legacy infrastructure and reducing costs to achieve a favorable ratio of fidelity to transmission distance.