Wired-Wireless Transceiver Echo Cancellation With Side Tone Feedback
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Solution Overview
Problem
Existing communication devices in mechanized vehicles face challenges with weighty wiring connections, limited communication range, and lack of line echo cancellation and side tone generation for immediate voice feedback, which are crucial for accurate instruction and control.
Innovation Solution
A wired/wireless transceiver that connects to an intercom communication controller and voice signal input/output devices, cancels line echo components, and generates side tones by synthesizing inverted voice signals to provide immediate feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired communication device is used in a mechanized vehicle, then reliable communication can be achieved, but the wiring connection becomes complicated and increases weight
Solution Approach 1:
The communication device is designed to support both wired and wireless communication modes, allowing it to adapt to different operational requirements. The device can function as a wired communication set when connected to the vehicle's internal network, and as a wireless communication set when operating outside the vehicle, eliminating the need for separate devices for each mode.
Solution Approach 2:
The communication device dynamically switches between wired and wireless communication modes based on the operational context. When the crew member is inside the vehicle, wired communication is used for reliable internal communication. When outside the vehicle, wireless communication is activated for external network communication, providing flexibility and adaptability.
2Device complexity
If a wireless communication device is used, then wiring complexity is reduced, but line echo cancellation and side tone generation are not provided
Solution Approach 1:
The device pre-processes the voice signal by generating an inverted version of the user's voice and subtracting it from the received signal before output. This preliminary anti-action cancels out the line echo component that would otherwise interfere with the user's ability to hear their own voice clearly, resolving the technical contradiction between wireless simplicity and voice feedback quality.
3Device complexity
If voice signal is transmitted without line echo cancellation, then device complexity is reduced, but voice signal clarity is degraded
Solution Approach 1:
The device extracts and removes the line echo component from the composite voice signal by using signal subtraction. The inverted user voice signal is separated from the received signal and subtracted to isolate the other party's voice, achieving clear voice transmission without requiring complex full-duplex cancellation systems.
Data Source
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AI summary
Disclosed are a wired/wireless transceiver and a method for line echo cancellation that can select a wired or wireless manner according to the convenience and surrounding environment of a target user, transmit and receive a voice signal to/from a different user, cancel a line echo component of the target user included in a voice signal of the different user, generate a side tone of the target user, and provide the side tone to the target user in a preset time.