TV Remote Voice Recognition Using Dual-Microphone Error Guidance
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Solution Overview
Problem
TV remote controls with unidirectional microphones face low speech recognition rates due to users speaking at incorrect locations or in low volumes, as they often assume the microphone position is the same as on their mobile phones or near the speech recognition button, leading to ineffective voice command recognition.
Innovation Solution
Implementing a system where a TV remote control with a unidirectional microphone communicates with an omnidirectional microphone on the TV or an AI speaker to confirm speech recognition, using frequency domain analysis to distinguish between incorrect positioning and low volume, and providing visual or auditory feedback to guide users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a unidirectional microphone is used on the remote control to reduce ambient noise interference, then noise rejection is improved, but speech recognition rate deteriorates when users speak from incorrect directions
Solution Approach 1:
The patent combines a unidirectional microphone on the remote control with an omnidirectional microphone on the TV to merge their complementary strengths. The unidirectional mic captures speech from the front with noise rejection, while the omnidirectional mic captures speech from any direction. The system processes signals from both microphones together to achieve both noise rejection and high speech recognition rate regardless of user speaking direction.
Solution Approach 2:
The patent introduces signal processing algorithms as an intermediary between the physical microphones and speech recognition. The processing unit analyzes signals from both microphones, determines the dominant speaker direction, and selectively enhances or suppresses signals based on the unidirectional microphone's directional characteristics, thereby mediating between the directional constraint and the need for omnidirectional recognition.
2Object-affected harmful factors
If the microphone is positioned in a specific location on the remote control, then directional noise rejection is improved, but ease of operation deteriorates as users cannot locate the microphone easily
Solution Approach 1:
The patent applies visual indicators (such as LED lights or color-coded markings) at the microphone location on the remote control to make it easily identifiable. These visual cues change or illuminate to guide users to speak toward the correct direction, solving the problem of users not being able to locate the microphone while maintaining the benefits of directional noise rejection.
Solution Approach 2:
The system provides real-time feedback to users through visual or auditory signals when speech is detected from the correct direction versus incorrect directions. This feedback mechanism guides users to adjust their speaking direction toward the unidirectional microphone, making the directional requirement transparent and easy to operate despite the specific microphone positioning.
3Measurement precision
If frequency domain analysis is performed to distinguish between incorrect positioning and low volume, then measurement precision is improved, but use of energy increases due to additional processing
Solution Approach 1:
The patent applies frequency domain analysis selectively rather than continuously. The system first performs initial speech detection and only then applies the more energy-intensive frequency domain analysis when needed to distinguish between positioning errors and low volume. This partial application of the advanced processing technique reduces overall energy consumption while maintaining high measurement precision when required.
Data Source
AI summary
A control method for a system comprising a TV and a remote control, according to one embodiment of the present invention, comprises steps in which: a user's voice is received, at a first time point, through a first microphone attached to the remote control; the TV operates in response to the voice recognition result if the received user's voice is successfully recognized; and the TV displays an error guidance message or processes the user's voice received through a second microphone at the first time point, if recognition of the received user's voice has failed.