Display Audio Ducking During Voice Recognition Start Commands
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Solution Overview
Problem
Image display apparatuses face decreased voice recognition rates due to background noise interference from their own audio signal output, which exceeds predetermined levels, affecting user command recognition accuracy.
Innovation Solution
The apparatus includes a voice recognition system with a controller that reduces the audio signal output to a predetermined level when a voice recognition start command is detected, utilizing a background sound canceller to isolate user voice and a command word generator to optimize voice recognition command words, ensuring accurate command execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the image display apparatus outputs audio signal at normal volume, then the audio output quality is maintained, but the voice recognition rate decreases due to background noise interference
Solution Approach 1:
The system performs preliminary action by detecting the voice recognition start command word before actual voice recognition begins. Upon detection, it proactively decreases the audio output volume to a predetermined level in advance, creating favorable conditions for accurate voice recognition by reducing background noise interference before the recognition process starts
Solution Approach 2:
The audio output volume is made dynamic rather than static. The controller automatically adjusts the volume level based on the recognition state: decreasing to a predetermined level when voice recognition is active and restoring to normal level when recognition is complete. This dynamic adjustment resolves the contradiction between maintaining audio quality and improving voice recognition accuracy
2Measurement precision
If the volume of audio signal output is decreased to improve voice recognition, then voice recognition accuracy improves, but the audio output quality deteriorates
Solution Approach 1:
The audio volume adjustment operates periodically based on voice recognition cycles. The controller decreases volume when a voice recognition start command is detected and restores it after recognition completes. This periodic adjustment ensures high command recognition accuracy during recognition phases while maintaining normal audio output quality during non-recognition phases, resolving the contradiction between recognition accuracy and audio quality
Data Source
AI summary
Provided are an image display apparatus and a method of controlling the same. The image display apparatus enabling voice recognition includes: a first voice inputter which receives a user-side audio signal; an audio outputter which outputs an audio signal processed by the image display apparatus; a first voice recognizer which recognizes the user-side audio signal received through the first voice inputter; and a controller which decreases a volume of the audio signal output through the audio outputter to a predetermined level if a voice recognition start command is received.