Digital Broadcasting Terminal Reception Quality Indicator
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Solution Overview
Problem
Conventional digital multimedia broadcast terminals lack standardized methods to accurately indicate the reception quality of digital broadcast signals, relying on varying criteria and parameters that differ among manufacturers.
Innovation Solution
A method and terminal configuration that measure reception quality using specific points such as RF reception level, Signal-to-Noise Ratio, bit error rate before and after Viterbi decoding, and packet error rate, with a reception quality indicator displaying these metrics to users, maximizing efficiency by focusing on bit error rates before Viterbi decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple different criteria and parameters are used to indicate reception quality, then manufacturers can use their own proprietary methods, but the indication accuracy and user understanding become inconsistent and unreliable
Solution Approach 1:
The patent applies parameter changes by transitioning from multiple proprietary parameters to a single standardized parameter (BER before Viterbi decoding). This standardization resolves the contradiction by establishing a universal measurement criterion that ensures consistent and accurate reception quality indication across all digital broadcast terminals, while eliminating the variability introduced by manufacturer-specific methods
Solution Approach 2:
The patent implements universality by creating a reception quality indication method that works across all digital broadcast terminals regardless of manufacturer. By adopting BER before Viterbi decoding as the universal standard, the solution enables consistent reception quality assessment across diverse terminal types and manufacturers, resolving the inconsistency problem
2Reliability
If reception quality is measured using multiple parameters (RF reception level, SNR, BER before and after decoding, packet error rate), then comprehensive quality assessment is achieved, but the complexity of measurement and display increases
Solution Approach 1:
The patent applies the extraction principle by selecting only the most critical parameter (BER before Viterbi decoding) from the available set of reception quality parameters. This extraction approach maintains reliable quality assessment by focusing on the parameter that most directly reflects signal reception quality, while eliminating the complexity associated with measuring, processing, and displaying multiple parameters
Solution Approach 2:
The patent implements self-service by having the reception quality indicator automatically determine and display quality levels based on BER measurements without requiring manual configuration or complex user intervention. The system self-adjusts the display based on the measured BER values, simplifying the user interface while maintaining comprehensive quality assessment
Data Source
Figure 1~1(E)
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AI summary
A terminal for receiving digital broadcast signals includes signal receiving components for receiving a digital broadcast signal, and a first error rate detection unit for detecting a first bit error rate (BER) of the digital broadcast signal before the digital broadcast signal is decoded by a decoder. The terminal also includes a second error rate detection unit for detecting a second bit error rate (BER) of the digital broadcast signal after the digital broadcast signal is decoded by the decoder, and a packet error rate detection unit for detecting packet error rate (PER) of the digital broadcast signal. The terminal typically further includes a controller for determining reception quality of the digital broadcast signal based upon a value of the first BER, or the second BER, or the PER. A method for determining signal reception quality includes receiving a digital broadcast signal, detecting the BER, and determining reception quality of the digital broadcast signal based upon a value of the BER.