Multi-channel Video Intercom Two-wire Bus Gateway
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Solution Overview
Problem
Conventional video intercom systems face limitations in providing advanced digital services due to high deployment costs, restricted bandwidth, and incompatibility with existing two-wire bus infrastructures, making it difficult to access multimedia services simultaneously and efficiently across multiple users or dwellings.
Innovation Solution
A multi-channel video intercom system that utilizes a two-wire communication bus for audio, video, and data transmission, with a communications gateway connected to the Internet, allowing access to advanced digital services without requiring TCP/IP infrastructure within the video intercom system, enabling simultaneous management of audio and video intercoms across multiple dwellings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If IP technology is used in video intercom systems, then information flow and bandwidth are improved, but deployment costs increase due to complex cabling requirements
Solution Approach 1:
The two-wire bus is designed to perform multiple functions: it transmits both traditional intercom signals (audio, video, control) and data packets for advanced digital services. This multi-functionality allows the system to access high-bandwidth services without requiring separate dedicated cabling infrastructure, thereby improving information flow while avoiding the deployment complexity of IP-based systems.
Solution Approach 2:
A gateway device acts as an intermediary between the two-wire bus and external networks (Ethernet, Wi-Fi, mobile networks). The gateway translates and routes data packets between these different communication protocols, enabling access to broadband services through the existing two-wire infrastructure without requiring direct IP networking throughout the intercom system.
2Ease of manufacture
If PLC modems are used in video intercom systems, then existing cabling is reused, but device cost increases due to expensive modems
Solution Approach 1:
The system uses standard, low-cost two-wire bus components that are already deployed in conventional video intercom systems rather than expensive PLC modems. The solution leverages the existing inexpensive infrastructure and adds intelligence through software and gateway devices, avoiding the need for costly specialized hardware in each intercom unit.
3Adaptability or versatility
If Wi-Fi modules are added to each device, then IP-based access is enabled, but device cost and distance limitations increase
Solution Approach 1:
The system combines the advantages of wired two-wire bus communication (low cost, long distance, stable connection) with wireless gateway access to IP networks. Instead of equipping each intercom device with Wi-Fi, a centralized gateway provides wireless connectivity to external networks, allowing multiple devices to share a single wireless interface and reducing overall system cost.
4Device complexity
If conventional two-wire bus is used, then deployment cost is reduced, but information flow and bandwidth are restricted
Solution Approach 1:
The two-wire bus implementation is dynamically adaptable: it can operate in traditional mode for basic intercom functions and simultaneously handle data packets for advanced services when bandwidth is available. The system dynamically allocates the communication channel between voice/video traffic and data traffic, allowing bandwidth to be shared flexibly between different service types without requiring separate physical infrastructures.
Data Source
AI summary
A multi-channel video intercom system with access to advanced digital services includes a two-wire communication bus for audio, video, and data communications in different communication channels, at least one outdoor panel having a camera connected to the communication bus, at least one power supply connected to the communication bus to provide power to the rest of the video intercom system, at least one user terminal connected to the communication bus wherein at least one terminal is connected to the at least one outdoor panel, and wherein at least one terminal is a video intercom terminal. The system further includes a communications gateway connected to the communication bus through a first connection interface and Internet connected through a second connection interface wherein the gateway is allowed access to advanced digital services via the Internet from at least one video intercom terminal through at least one communication bus channel available for data.