ATSC 3.0 Service List Table Frequency Correlation
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Solution Overview
Problem
In the Advanced Television Systems Committee (ATSC) 3.0 standard, digital television receivers face challenges in efficiently selecting the best RF frequency for a service across multiple broadcast regions, as existing methods require database lookups to correlate Broadcast Stream Identifiers (BSID) with RF frequencies, especially in multifrequency networks, leading to increased complexity and channel acquisition time.
Innovation Solution
The method involves a digital television receiver that receives a service list from over-the-air or over-the-top transmitters, extracts correlations between service identifications and RF frequencies, and selects the best frequency based on quality metrics, such as signal-to-noise ratio, to present the service on an audio-visual display, thereby eliminating the need for database lookups and reducing channel scanning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If database lookups are used to correlate BSID with RF frequencies in multifrequency networks, then service identification accuracy is improved, but channel acquisition time increases
Solution Approach 1:
The patent applies preliminary action by pre-correlating BSID values with RF frequencies and storing them in a lookup table within the receiver. This allows the receiver to directly retrieve frequency information from the service list without performing database lookups during channel acquisition, thus maintaining service identification accuracy while significantly reducing channel acquisition time.
2Measurement precision
If database lookups are used to correlate BSID with RF frequencies, then frequency correlation accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies copying by creating a simplified local copy of the frequency correlation data in the form of a lookup table containing BSID-frequency pairs. This local copy eliminates the need for complex database lookup operations and external data management, maintaining frequency correlation accuracy while reducing receiver complexity.
3Loss of information
If service lists include RF frequency descriptions for all broadcast regions, then service availability information is improved, but data transmission volume increases
Solution Approach 1:
The patent applies universality by designing the service list to include RF frequency descriptions that serve multiple functions: they provide service availability information across broadcast regions, enables direct frequency tuning, and support both single-frequency and multi-frequency network operations. This multi-functional approach maintains comprehensive service availability information while optimizing data transmission efficiency.
Data Source
AI summary
Techniques are described for expanding and/or improving the Advanced Television Systems Committee (ATSC) 3.0 television protocol in robustly delivering the next generation broadcast television services. An ATSC3.0 service list table (SLT) contains correlations between service IDs and frequencies so that a receiver receiving duplicate services on different frequencies in a boundary between broadcast regions can select the best frequency to tune to in order to present the service, without having to access a database to correlate service IDs to frequencies.