Ultrasound-based voice assistant wake-up method and apparatus, computer device and storage medium

Abstract

The present invention relates to an ultrasound-based voice assistant wake-up method and apparatus, a computer device and a storage medium. The method comprises the steps of receiving an ultrasonic wake-up instruction from a wake-up device; analyzing the received ultrasonic wake-up instruction to obtain a spectrum analysis result; comparing the spectrum analysis result with the spectrum of a presetultrasonic wake-up instruction to determine whether the spectrum analysis result is matched with the spectrum of the preset ultrasonic wake-up instruction or not; and if so, waking up and activatinga voice assistant, and returning confirmed activation information. According to the scheme of the present invention, an intelligent voice device in a standby state is configured to collect ultrasonicaudio, so that the intelligent voice device is prevented from monitoring the user conversation in real time during a standby state, and the user privacy can be protected; and in addition, difficulty of implementation of the ultrasonic audio recognition technology is controllable, so that compared with an existing method for using a statistic model or a deep neural network model to perform wake-upkeyword recognition, the CPU performance and memory capacity requirements are greatly reduced, and the setup cost of a recognition device is reduced while ensuring recognition accuracy and efficiency.

Description

technical field [0001] The present invention relates to the field of intelligent terminals, and more specifically refers to a method, device, computer equipment and storage medium for waking up a voice assistant based on ultrasonic waves. Background technique [0002] With the maturity of intelligent voice-related technologies, more and more applications are used to interact and control devices through voice instead of traditional UI interfaces. Usually, such "smart" devices accept user voice commands through "voice assistants", and before accepting voice control, they need to "wake up" the voice assistant in standby mode first. [0003] The currently commonly used technical solution is to wake up the voice assistant by voice by customizing an easy-to-distinguish phrase as a wake-up command (such as "Hello Tmall"). During the operation of a device with intelligent voice capabilities, the voice assistant will monitor the background conversations in the environment in real ti...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, due to environmental sound interference, multiple people speaking at the same time, and homonym interference, etc., false wake-ups of the "voice assistant" are prominent (including false wake up or miss wake up); in addition, due to smart voice devices The ability to wake up offline is required, which requires the ability to determine the wake-up word in real time on the smart device terminal, which requires a large amount of computing resources and has high requirements for CPU and memory capacity, which increases the cost of smart terminal devices accordingly

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