Call Quality Assessment Using Terminal Sampling Rates
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Solution Overview
Problem
Existing call quality information methods fail to accurately reflect the quality of calls between terminals due to reliance on network state alone, neglecting the characteristics of receiving and transmitting terminals.
Innovation Solution
A method that generates call quality information by considering bandwidth information and sampling rates of both transmitting and receiving terminals, involving encoding, decoding, and resampling of call signals to provide accurate call quality feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If call quality information is provided based only on network state, then the system complexity is reduced, but the measurement precision of call quality is insufficient
Solution Approach 1:
The patent segments the call quality assessment into multiple independent components: network state parameters, transmitting terminal characteristics (inputter sampling rate, encoder bandwidth), and receiving terminal characteristics (outputter sampling rate, decoder bandwidth). Each component is measured and evaluated separately, then integrated to form a comprehensive call quality assessment. This segmentation allows for precise measurement of each factor without overwhelming system complexity.
Solution Approach 2:
The patent creates a universal call quality information generation method that can be applied to various terminal types and configurations. The system universally collects and processes bandwidth information and sampling rate data from different terminals, making the call quality assessment applicable across diverse VoIP implementations regardless of specific hardware or software variations.
2Measurement precision
If terminal characteristics are collected and processed, then call quality information accuracy is improved, but the loss of time for information processing increases
Solution Approach 1:
The patent implements preliminary action by having terminals pre-report their bandwidth information and sampling rate characteristics before actual call quality assessment is needed. These terminal characteristics are collected and stored in advance, so when call quality information needs to be generated, the system can immediately combine them with current network state data without time-consuming queries or measurements.
3Measurement precision
If bandwidth information and sampling rates from both terminals are considered, then call quality assessment accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by standardizing the representation of terminal characteristics into uniform data structures. Bandwidth information is normalized to consistent units, and sampling rates are standardized across different terminal types. This parameter standardization simplifies the processing complexity while maintaining comprehensive assessment accuracy, as the system deals with consistent, comparable parameters rather than diverse, incompatible data formats.
Data Source
AI summary
Provided is a method of performing a call by decoding an encoded call signal from a transmitting terminal at a desired reference sampling rate, by resampling the decoded call signal at a sampling rate supported by an outputter, and by outputting the resampled call signal through the outputter, and generating and providing information on a bandwidth used for the call based on bandwidth information on the encoded call signal, the reference sampling rate, and the sampling rate supported by the outputter.