VoIP Adaptor Mode Selection for Audio Quality and Bandwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
VoIP devices lack a mechanism to efficiently assign broadband connections among multiple telephone devices based on whether wideband analog audio input signals are present, limiting the ability to provide higher quality wideband audio services.
Innovation Solution
A VoIP device selectively assigns either a narrowband or wideband mode of operation for converting analog audio signals to data packets based on the frequency characteristics of the signals, allowing for the efficient use of resources and bandwidth when wideband signals are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a VoIP device supports broadband connections for wideband audio services, then audio quality is improved, but resource consumption and network bandwidth usage increase
Solution Approach 1:
The VoIP device dynamically switches between narrowband and wideband modes based on real-time detection of input signal frequency characteristics. The system monitors the analog audio input signals and automatically assigns the appropriate mode (narrowband G.711 or wideband G.722) to each communication channel, allowing resource consumption to adapt to actual service requirements rather than consistently operating in high-resource wideband mode
Solution Approach 2:
The system changes the operational parameters of the VoIP device by selectively applying different frequency bandwidth parameters. When wideband analog audio input signals are detected (frequency range 50Hz-7kHz), the device switches to wideband mode with corresponding parameter adjustments; when only narrowband signals are present (200Hz-3.4kHz), it operates in narrowband mode, thereby optimizing resource usage according to signal characteristics
2Measurement precision
If wideband mode is assigned to all communication channels, then audio quality is improved, but network bandwidth availability decreases
Solution Approach 1:
The patent applies different quality levels (narrowband or wideband) to different communication channels based on local conditions - specifically, whether the analog audio input signal for that channel has wideband frequency components. Each channel is independently evaluated and assigned the appropriate mode, rather than uniformly applying wideband to all channels, thus preserving network bandwidth for channels that don't require it
3Measurement precision
If a mechanism for assigning broadband connections is implemented, then wideband service quality is improved, but device complexity increases
Solution Approach 1:
The VoIP device performs self-service by automatically detecting the frequency characteristics of incoming analog audio signals and autonomously determining the appropriate mode assignment. The system monitors its own input signals, identifies wideband components, and assigns wideband or narrowband mode without requiring external control or complex manual configuration, thereby limiting the increase in device complexity to only what is necessary for automatic detection and mode switching
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A device selects a mode and communicates data based on the selected mode. The device comprises at least one interface circuit configured to monitor analog audio signals from a customer premise equipment device and a processor circuit. The processor circuit assigns a first band mode for converting the analog audio signals to data packets if the analog audio signals do not have frequency components outside the first band of frequencies and assigns a second band mode for the conversion otherwise. The assignment of the second band mode for the conversion enables the output circuit to use a larger bandwidth of the communication channel to a network.