Voice Recognition Device Audio Notification and Buffer Correction
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Solution Overview
Problem
Voice recognition devices often experience erroneous recognition due to the inability to record the beginning part of the voice signal when the user starts speaking before the device enters the voice recognizing state, particularly in devices without display screens, leading to increased processing load when attempting to notify users of speech start timing.
Innovation Solution
A voice recognition device with a processor that stores dictionary data and digital voice signals, which generates and corrects character strings by considering the likelihood of preceding words, allowing for automatic correction of recognition results based on the time interval between the voice input start instruction and the actual voice signal input, without the need for user notification or display processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If display notification is used to notify users of speech start timing, then user awareness of speech timing is improved, but device complexity and processing load increase
Solution Approach 1:
The patent extracts the notification function from the display system and implements it through audio output instead. The voice recognition device generates audible notifications (beeps or tones) to inform users of speech start timing, thereby eliminating the need for display processing while maintaining user awareness.
Solution Approach 2:
The patent replaces the visual display mechanism with an acoustic notification mechanism. Instead of using the display screen to show timing information, the system uses the audio output device to emit sounds, substituting a mechanical/electronic display system with a simpler audio feedback system that reduces processing requirements.
2Speed
If voice recognition starts immediately after button press, then response speed is improved, but recognition accuracy deteriorates due to inability to record beginning part of voice signal
Solution Approach 1:
The patent implements preliminary recording action by continuously recording audio in a buffer before the voice recognition command is actually executed. When the user presses the voice input button, the system has already been capturing audio signals in advance, so the beginning part of the voice signal is preserved in the buffer even though recognition processing starts immediately after the button press.
Solution Approach 2:
The patent provides beforehand cushioning by maintaining an audio buffer that stores recent audio signals before recognition begins. This buffer acts as a cushion that ensures the initial portion of the user's speech is captured and available for analysis, preventing loss of critical beginning segments while allowing immediate response to the button press.
Data Source
AI summary
A voice recognition device includes a memory that stores dictionary data in which likelihoods that each of registered words precedes other registered words are stored, and digital voice data corresponding to a voice signal input through a microphone, and a processor configured to perform voice recognition and acquire a first character string corresponding to the digital voice data, when a first letter of the first character string is a vowel letter, generate a plurality of first words that precede a second word in the first character string according to the dictionary data, each of the first words having a different first letter, and select one of the first words based on the likelihoods and output the second character string that is a combination of the selected first word and the second word.