Set-Top Terminal Signal Detection Using Tuner Pooling and Queuing
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Solution Overview
Problem
Current set-top terminals face inefficiencies in detecting multiple types of signals on cables, particularly when users incorrectly connect off-air or cable signals, due to the need for time-consuming scans across various channel frequencies and standards.
Innovation Solution
A method employing multiple tuners in a set-top terminal to rapidly scan for cable and off-air signals using specific scan configurations, with user input to optimize detection and correct misconnections, allowing for efficient identification of signal types and formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a single tuner is used to scan for signals, then the device complexity is reduced, but the signal detection time increases significantly
Solution Approach 1:
The patent divides the signal scanning task into multiple segments by assigning different tuners to scan different frequency ranges or signal types simultaneously. This segmentation allows parallel processing of the scanning task, reducing total detection time while maintaining manageable device complexity through modular tuner assignment.
Solution Approach 2:
The patent combines multiple tuners into a coordinated scanning system where they work together to detect signals across different frequency ranges and standards. By merging the capabilities of multiple tuners and pooling their resources, the system achieves rapid comprehensive signal detection without requiring each individual tuner to perform the entire scanning sequence alone.
2Measurement precision
If comprehensive scans of all possible channel frequencies and modulations are conducted, then signal detection accuracy is improved, but the scanning time increases
Solution Approach 1:
The patent performs preliminary scanning actions by having multiple tuners simultaneously scan different frequency ranges and signal types before a complete comprehensive scan is necessary. This preliminary action identifies likely signal locations and types, allowing the system to focus subsequent detailed scanning efforts only where needed, thus maintaining high detection accuracy while reducing overall scanning time.
Solution Approach 2:
The patent implements partial scanning actions where tuners scan specific frequency ranges or signal types based on user input or preliminary detection results, rather than performing exhaustive scans of all possible channels. This partial action approach maintains sufficient detection accuracy for practical purposes while significantly reducing the time required compared to complete comprehensive scanning of all frequencies and modulations.
3Adaptability or versatility
If multiple scan configurations are implemented to handle different connection scenarios, then adaptability to user connections is improved, but the control logic complexity increases
Solution Approach 1:
The patent implements dynamic scan configuration selection where the scanning strategy automatically adapts based on user input and detected signal characteristics. The system can switch between different scan configurations (such as cable-only, off-air-only, or combined scans) depending on the situation, providing high adaptability to various connection scenarios while managing logic complexity through automated dynamic selection rather than requiring manual configuration of multiple static scan modes.
Data Source
AI summary
Systems and methods are provided for minimizing cable and off-air signal detection on separate cable and off-air input jacks in a set-top terminal with two or more tuners. The systems and methods employ logic to progress through different scan configurations with different input jack/signal detection assignments to minimize signal detection delay. Tuners are pooled for a given input jack/signal assignment, scanned frequencies are queued and carried to the next scan configuration, and user input is employed, whenever possible. The systems and methods are of particular value for retail applications, where users may install cable, off-air, or both sources incorrectly to their set-top terminal's cable and off-air input jacks.