Channel Scanning Resumption via Stored Progress Data
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Solution Overview
Problem
Channel scanning processes in devices like TVs and PMPs are time-consuming, especially when traveling to different countries with varying channel allocations, as they require frequent re-scanning of frequency bands.
Innovation Solution
A method and system that store scan progress information to resume interrupted channel scanning, locking onto the next carrier RF and acquiring channel information, which includes representative images or video frames, to efficiently update the channel table.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If channel scanning is performed frequently to adapt to different countries' channel allocations, then adaptability is improved, but time consumption increases
Solution Approach 1:
The system performs preliminary actions by storing scan progress information (last scanned frequency, found channels) before interruption. When resuming scanning, the system uses this pre-stored information to continue from where it left off, avoiding redundant scanning of already processed frequencies. This preliminary storage of progress data enables rapid resumption and reduces overall time consumption while maintaining adaptability to different regions.
2Ease of operation
If channel scanning is interrupted and resumed, then user convenience is improved, but scanning time increases
Solution Approach 1:
Before interruption occurs, the system stores scan progress information including the last processed frequency and found channels. When the user resumes scanning after interruption, the system retrieves this pre-stored progress data and continues scanning from the saved position rather than restarting from the beginning. This preliminary preservation of scanning state enables convenient interruption/resumption while minimizing time loss.
Solution Approach 2:
The system implements feedback by continuously monitoring and storing scan progress information during the scanning process. This feedback mechanism allows the system to remember what has already been scanned and what remains to be scanned. When resuming, the system uses this feedback information to efficiently continue from the correct position, maintaining user convenience while reducing redundant scanning time.
3Reliability
If complete channel scanning is performed from scratch, then completeness is improved, but efficiency decreases
Solution Approach 1:
The system performs preliminary storage of scan progress information (last frequency, found channels) during the scanning process. When resuming scanning, the system uses this pre-stored progress data to continue from where it left off, avoiding redundant scanning of already processed frequencies. This ensures completeness by maintaining accurate tracking of scanned regions while significantly improving efficiency by eliminating repeated work on already scanned areas.
Solution Approach 2:
The system implements feedback by continuously monitoring and storing scan progress information throughout the scanning process. This feedback mechanism provides the system with awareness of what has already been scanned and what remains. When resuming scanning, the system uses this feedback to efficiently continue from the correct position, ensuring complete channel detection while maximizing scanning efficiency by avoiding redundant operations.
Data Source
AI summary
Methods for channel scanning are provided. An embodiment of a method for channel scanning comprises scan progress information stored when interrupting a channel scanning process. A carrier RF subsequent to the most recently processed carrier RF is locked onto with reference to the stored scan progress information when resuming the interrupted channel scanning process. Channel information of a program carried by the locked carrier RF is acquired. The acquired channel information of the program is stored in a channel table.