Retrofit Digital Speaker System Using Existing Two-Wire Cables
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Solution Overview
Problem
Conventional 70V/100V audio distribution systems lack bidirectional communication capabilities and efficient digital signal processing, making it difficult to upgrade speakers without replacing existing analog cabling, which is costly and disruptive.
Innovation Solution
A retrofit digital speaker system that uses existing two-wire analog audio cables to transmit digitally encoded audio signals, electrical power, and digital command signals, featuring a daisy-chain configuration, digital signal processing, and bi-directional communication capabilities, including a relay to control signal transmission and a commissioning computer to optimize data throughput and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If new speakers with digital signal processors are installed in conventional 70V/100V systems, then audio quality improves, but the system cannot utilize digital processing techniques because the cabling is analog
Solution Approach 1:
The patent changes the electrical parameters of the existing cabling system by superimposing high-voltage digital signals onto the traditional 70V/100V audio cables. This allows the analog cabling to carry both power and digital data signals simultaneously, enabling digital processing capabilities without replacing the physical infrastructure.
Solution Approach 2:
The existing two-wire analog audio cables are made multi-functional by enabling them to carry both electrical power for the speakers and digitally encoded audio signals. This universal usage eliminates the need for separate digital cabling while providing both power and data transmission capabilities.
2Adaptability or versatility
If new cabling is installed to enable digital processing, then digital processing techniques can be utilized, but the installation is very expensive and requires building sections to be down
Solution Approach 1:
The system uses the existing cabling infrastructure to provide both power and digital signal transmission, making the old cables serve new purposes without requiring replacement. This self-service approach to infrastructure utilization eliminates expensive re-cabling projects and associated building disruptions.
3Length of stationary object
If conventional 70V/100V speaker systems are used, then long cable capability and large number of speakers per amplifier channel are achieved, but bidirectional communication and efficient digital signal processing are lacking
Solution Approach 1:
The system transitions from static unidirectional analog signal transmission to dynamic bidirectional digital communication. Speakers can now send information back to the amplifier, enabling real-time diagnostics, volume control, and system management while maintaining the long cable capability of the original 70V/100V architecture.
4Manufacturing precision
If speakers are swapped in conventional systems, then speaker design improvements are achieved, but additional electronics require power that cannot be delivered to remote locations
Solution Approach 1:
The patent merges the power transmission and digital signal transmission functions into a single integrated system using the existing two-wire infrastructure. This combination allows sufficient power to be delivered to remote speakers while simultaneously providing digital communication capabilities, solving both power delivery and digital processing needs.
Data Source
AI summary
Described herein is a retrofit digital speaker system comprising two or more retrofitted speaker enclosures, each of the two or more retrofitted speaker enclosures (enclosures) comprising: at least one speaker; and an analog-and-digital interface adapted to receive digitally encoded audio signals, electrical power, and digital command signals, and wherein the digitally encoded audio signals, electrical power, and digital command signals are transmitted over existing two wire analog audio cables, and further wherein the two or more retrofitted speaker enclosures are wired in a daisy chain fashion, via the existing two wire analog audio cables.