Broadcast Receiver List Update via Frequency Matching
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Solution Overview
Problem
Existing broadcast receivers face challenges in shortening the time required to create a broadcast station list while maintaining its accuracy, especially when mounted on mobile devices that move out of the receivable area, leading to unreceivable stations remaining in the list.
Innovation Solution
A broadcast receiver with a processor and memory that scans a frequency band, omits acquiring information for receivable stations with matching frequencies already in the list, deletes unreceivable stations, and updates information based on ID matching, thereby shortening the search time and ensuring list correctness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the broadcast receiver acquires information for all scanned broadcast stations to create an accurate station list, then the correctness of the broadcast station list is improved, but the time required to create the list increases
Solution Approach 1:
The patent extracts only the necessary information acquisition steps - specifically, it omits acquiring detailed broadcast station information when a station with the same frequency already exists in the list, while still maintaining list correctness by performing frequency matching checks
Solution Approach 2:
The patent performs preliminary frequency band scanning and frequency matching before full information acquisition, allowing it to identify and skip stations that will duplicate existing entries, thus reducing overall processing time while maintaining accuracy
2Loss of time
If the broadcast receiver skips stations already in the station selection success list to shorten search time, then the searching time is reduced, but unreceivable stations remain in the list when the mobile body moves out of the receivable area
Solution Approach 1:
The patent implements a feedback mechanism where the broadcast station list is continuously updated by comparing current frequency band scanning results with existing list entries, allowing the system to detect and remove unreceivable stations while maintaining up-to-date information
Solution Approach 2:
The patent performs periodic frequency band scanning and list updates at scheduled intervals, ensuring that the broadcast station list remains current without requiring continuous scanning, thus balancing time efficiency with accuracy maintenance
3Device complexity
If the broadcast receiver uses the same tuner for both receiving broadcasts and creating the station list, then the device complexity is reduced, but the user cannot enjoy broadcasts while the list is being created
Solution Approach 1:
The patent implements dynamic tuner allocation where the tuner can switch between broadcast reception mode and station list creation mode based on operational requirements, allowing seamless transition without requiring additional hardware components
Data Source
AI summary
To provide a technology of updating a broadcast station list capable of both shortening a searching time and deleting an unreceivable broadcast station.A broadcast receiver includes a processor and an associated memory configured to: control a tuner to scan a predetermined frequency band and search for a receivable broadcast station in the predetermined frequency band; and create a list including at least the receivable broadcast station by acquiring information of the receivable broadcast station. When there is a second receivable digital broadcast station at a frequency corresponding to a first digital broadcast station that already exists in the list when scanning, the processor omits acquisition of broadcast station information of the second digital broadcast station and uses broadcast station information of the first digital broadcast station that exists in the list as information of the second digital broadcast station.