Telecommunications Terminal Echo Suppression Visual Feedback
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Solution Overview
Problem
Acoustic echo in speakerphone mode causes undesirable artifacts, and existing echo canceling and suppression methods are limited by slow adaptation to environmental changes and lack of user feedback, leading to frustrating speech clipping or suppression issues.
Innovation Solution
A method is implemented to display an indication when a user's voice is likely to be disrupted by echo suppression, using a visual cue like an LED display to show the probability or amount of echo suppression applied, allowing users to adjust their speaking pattern or position to prevent clipping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If acoustic echo suppression is applied to prevent echo artifacts, then echo cancellation is improved, but user speech is clipped or suppressed causing frustration
Solution Approach 1:
The patent implements a visual feedback mechanism using an LED indicator that provides real-time information to users about when their speech is being suppressed due to echo cancellation. This feedback loop allows users to understand the system's behavior and adjust their speaking patterns accordingly, resolving the frustration caused by unexpected speech clipping while maintaining effective echo suppression.
2Object-affected harmful factors
If adaptive filter is used for acoustic echo canceling, then echo cancellation is improved, but adaptation is slow taking several seconds to respond to changes
Solution Approach 1:
The patent applies preliminary action by providing visual warnings to users before their speech is suppressed. The LED indicator alerts users in advance that echo suppression is active, allowing them to adjust their behavior proactively rather than reacting to delayed feedback after speech has already been clipped. This preliminary notification mechanism compensates for the slow adaptation speed of the adaptive filter.
3Reliability
If acoustic echo canceling is used to improve signal quality, then transmission quality is improved, but user awareness of suppression is lost leading to frustration
Solution Approach 1:
The patent restores lost information by implementing a visual feedback system that informs users when echo suppression is active. The LED indicator provides continuous information about the system's state, compensating for the information loss that occurs during speech suppression. This allows users to maintain awareness of when their speech is being affected and adjust accordingly, while the echo canceling continues to improve signal transmission quality.
Data Source
AI summary
A user of a telecommunications terminal is made aware when the user's voice is disrupted by echo suppression, which notifies the user that he or she can adjust his or her speaking pattern, or move closer to the microphone in order to stop the clipping.