“The embedded portable voice controller is integrated into the smart home wireless sensor network through the home gateway inside the home. The terminal recognizes the voice information locally and forwards the corresponding control command to the gateway, and then forwards it to the corresponding device via the gateway and server Carry out the execution of the action command.
Technology makes life smarter, and voice makes interaction more convenient. The most direct meaning of voice interaction is to make the “smart home” truly smart. No matter how advanced the technology, no matter how friendly the human-computer interface is, there is no simple and direct voice control.
Domestic development status and trends
At present, there are many domestic companies involved in voice control technology, and their competitiveness is relatively high. In order to stand out in this industry, it is necessary to continuously strengthen voice control technology, eliminate noise interference as much as possible, increase its preset command word recognition, and shorten its voice recognition response time, so as to improve the intelligent level of home products and let people enjoy To a truly smart home life.
Technology changes lives. High-tech voice control technology allows people to enjoy a more convenient home life. Nowadays, many smart home products use wireless voice control technology with higher recognition rate and faster response speed. It can also recognize commands and do offline. Out of reaction. With the continuous upgrading of domestic voice control technology, the size of the template is getting smaller and smaller, which can support 80 offline voice commands, support real-person audio broadcast, and achieve an offline voice recognition rate of more than 95% under the condition of background noise of 50db. The voice recognition response time is shorter, and the response can be made within 200-800ms, and the user experience is very good.
Compared with the online voice control technology, the wireless voice technology algorithm is more expandable in the later stage, and the cost will be lower. Its instructions are preset in advance. When using it, only the corresponding instructions need to be recognized. It is also very important to improve the compatibility of voice control technology, improve its adaptability, so that its use range will be wider, and modern household products can also achieve whole-house control.
How to make smart home “obedient”
“Voice recognition” technology is equivalent to installing “ears” in a computer system to make it “listenable”. This technology undergoes complex steps such as speech signal processing, speech feature processing, model training and decoding engine, so that the machine can finally recognize the content, speaker, language and other information in the speech. The realization of the voice control function is highly related to the user’s usage habits.
Near-field speech recognition
The user needs to click to start, and the distance between the user and the terminal device, such as a mobile phone or other terminal device, can be directly used to realize the control function of these terminal devices.
Far-field speech recognition
A technology in which voice data picked up by a microphone array at a long distance is used as input data, and the voice signal is transcribed into text through a voice recognition algorithm. Although it is the same in principle as the near-field speech recognition technology, due to the increase in the spatial distance between the sound source and the microphone, signal strength attenuation and various noise interferences will occur during the sound wave propagation process, so special speech data is required Picking and pretreatment technology. Different pickup equipment and preprocessing technologies often change the characteristics of the acoustic signal used for voice recognition. Therefore, for different far-field voice pickup technologies, it is necessary to customize and optimize the voice recognition engine.
Specific realization process
The entire smart home voice control system is mainly composed of mobile terminal voice control software and embedded portable voice controller. After the terminal installed with the mobile terminal voice control software receives the local voice information, it sends the local voice information to the cloud through the network (3G, GPRS, WiFi) for identification, and then analyzes the data feedback from the cloud and matches it with the local setting instructions. Obtain the correct control instructions.
Through the server and gateway, these instructions are forwarded to the corresponding devices for execution of the action instructions, and the internal devices of the home can be voice controlled anytime and anywhere. The embedded portable voice controller is integrated into the smart home wireless sensor network through the home gateway inside the home. The terminal recognizes the voice information locally and forwards the corresponding control command to the gateway, and then forwards it to the corresponding device via the gateway and server Carry out the execution of the action command.
The integration of smart voice and smart home is the general trend. The industry generally believes that voice, as the most natural and convenient way of interacting with human information, will surely become an important part of smart home equipment in the future.