CATV Entry Adapter Isolating In-Home Entertainment Signals
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Solution Overview
Problem
CATV networks face challenges in maintaining the privacy and security of In-Home Entertainment (IHE) signals, as they can leak into adjacent subscriber premises, causing interference and compromising privacy, and existing solutions like IHE frequency rejection filters are prone to unauthorized removal or malfunction.
Innovation Solution
A CATV entry adapter with a bidirectional splitter/combiner and directional couplers that prevent IHE signals from entering the CATV network, while allowing CATV and IHE signals to be transmitted between active and passive ports, using an IHE frequency rejection filter to block IHE signals from the CATV network entry port.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IHE signals are transmitted through the CATV network infrastructure, then in-home entertainment functionality is enabled across multiple rooms, but IHE signals can leak into adjacent subscriber premises causing interference and compromising privacy
Solution Approach 1:
The patent segments the signal paths by providing separate communication paths for CATV signals and IHE signals within the entry adapter. The bidirectional splitter/combiner divides the coaxial cable signal into CATV upstream and downstream paths, while directional couplers create dedicated IHE signal paths that are isolated from the CATV network, preventing signal leakage to adjacent premises.
Solution Approach 2:
The patent introduces directional couplers as intermediary devices that couple IHE signals to the coaxial cable infrastructure while isolating them from the CATV network. These couplers act as mediators that enable IHE functionality without allowing IHE signals to interfere with or leak into the CATV system or adjacent subscriber premises.
2Object-affected harmful factors
If IHE frequency rejection filters are used to block IHE signals from entering the CATV network, then signal privacy is protected, but the filters are prone to unauthorized removal or malfunction
Solution Approach 1:
The patent replaces the vulnerable IHE frequency rejection filter with directional couplers that physically isolate IHE signals from the CATV network through their coupling mechanism. This intermediary approach provides more reliable signal containment that cannot be easily removed or malfunctioned like electronic filters.
Solution Approach 2:
The bidirectional splitter/combiner and directional couplers automatically perform signal separation and containment without requiring active electronic control or power. The passive optical isolation inherent in these components provides continuous, maintenance-free protection against signal leakage.
3Reliability
If a bidirectional splitter/combiner and directional couplers are used to isolate IHE signals, then signal privacy and network integrity are maintained, but device complexity increases
Solution Approach 1:
The patent combines multiple functions (CATV signal distribution, IHE signal distribution, and signal isolation) into a single entry adapter unit. By integrating the bidirectional splitter/combiner and directional couplers within one device, the patent reduces overall system complexity compared to using separate external components.
Solution Approach 2:
The entry adapter is designed as a universal device that simultaneously handles both CATV and IHE signals through its multiple ports and integrated components. This multi-functionality eliminates the need for separate dedicated equipment for each signal type, simplifying the overall installation despite the sophisticated internal architecture.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively confines IHE signals within the subscriber's premises, preventing interference and maintaining privacy, while allowing full utilization of passive ports in IHE networks without signal degradation, and is protected from unauthorized tampering or physical exposure.
Implementation Method 1
a first bidirectional splitter/combiner contained within the housing and having a common terminal and separate signal component legs. The separate legs of the second splitter are connected individually to the active ports.
Implementation Method 2
An active-side directional coupler is operatively connected between the common terminal of the second splitter and one of the separate legs of the first splitter. A passive-side directional coupler is operatively connected between the passive port and another of the separate legs of the first splitter.
Implementation Method 3
an IHE frequency rejection filter contained within the housing, wherein the IHE frequency rejection filter is directly connected between the first bidirectional splitter/combiner and the CATV network entry port
Data Source
AI summary
A cable television (CATV) entry adapter connects to a CATV network and serves as a hub in an In-Home Entertainment (IHE) network. IHE signals may be communicated between passive and active ports of an embodiment of the entry adapter through a pair of directional couplers which allow an IHE-enabled embedded multimedia terminal device (eMTA) at the passive port to communicate with multimedia devices of the IHE network connected to the active ports. An IHE frequency rejection filter is used in some embodiments to confine IHE signal to a single subscriber premise. In some embodiments a bidirectional IHE bandpass filter is used to enable IHE signals to pass between the passive and active ports of the CATV entry adapter.