Large-screen TVs become traffic entrances, and voice recognition becomes core competitiveness. In recent years, the sales of large-screen smart TVs have continued to gain popularity, and Internet TVs based on voice recognition are more popular with consumers. Xiaomi TV 4A is one of them.
According to the 2017W15 LCD TV online retail sales ranking statistics released by the relevant data, Xiaomi TV sales continued to rank first in recent weeks. Relevant sources believe that the reason why Xiaomi TV has firmly occupied the top sales in recent weeks is due to the recent release. Xiaomi TV 4A has the artificial intelligence voice function.
Some people think that the biggest pain point of the Xiaomi TV 4A artificial intelligence speech recognition function is the difficulty of searching for programs for the elderly and children, but it has not reached 100% recognition in precision recognition technology, and this is also the field of artificial intelligence speech recognition on the market. A common problem.
Although the accuracy is less than 100%, in the smart TV industry, the voice recognition technology of Xiaomi TV 4A is still at the forefront.
Not long ago, at the press conference of Xiaomi TV 4A, Xiaomi Wangchuan gave a live demonstration, explaining the charm and shortcomings of artificial intelligence speech recognition technology from 5 levels of tests. The main charm feature is the perfect realization of the first 4 level tests: element search plus type search, fuzzy description search, chaotic character relationship sorting, jump movies according to content, but in the 5th level test "homophone words" Defects in speech recognition were demonstrated when the instruction recognition error.
Most of the smart TVs have now entered the field of artificial intelligence voice TV. Although there are differences in the precise realization of technical recognition, the technical logic is exactly the same.
Taking Xiaomi TV as an example, when we send a voice control command through the voice recognition system of Xiaomi TV 4A, the TV system collects the signal, converts it into a digital voice signal through its own analog data preprocessing, and then converts it to a digital voice signal. The digital voice signal data is sent to the cloud, processed and analyzed by the cloud voice recognition and sent control instructions to the cloud, so that we can use voice to control the TV to watch the desired media video content.
The high-precision voice recognition of Xiaomi TV 4a is inseparable from the module design of the TV system. It is understood that the structure of the artificial intelligence voice TV system is divided into three modules.
Module 1: Voice recognition system
This module mainly converts the analog voice signals collected by the TV into digital voice signals in the cloud. The speech IC processing technology used in this stage can help the analog signal to be preprocessed, and then capture and feed back to the TV operating system through the characteristic parameters of the speech waveform.
The picture is a Chinese small vocabulary isolated word speech recognition waveform, source: network
Module 2: TV system processing
The TV system is a bridge connecting the voice recognition system and the cloud processing system. In the state of accessing the Internet, the TV system receives voice and preprocesses it, and has specific module characteristics for specific TV systems, and transmits the module characteristics and voice data to the cloud.
Module 3: Cloud processing system
As Ma Yun said: "People are not as good as days, days are clouds." The cloud processing system analyzes and processes digital voice data through cloud computing, and performs cloud intelligent recognition to complete the corresponding voice command function.
Analysts believe that the voice recognition technology of smart TVs will still be the core competitiveness of many smart TV brands in the future. In addition, scene applications such as VR will also become an important entry point for smart TVs.
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