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Voice control real wireless bluetooth headset solution

date: 2019-08-28
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With smart phones is blossoming in the whole world, the use of the bluetooth headset is already commonplace in modern people's life, under the constantly strive for perfection, a lot of equipment manufacturers, whether it is a bluetooth headset rich appearance design, or a bluetooth headset high-quality performance experience, has made the traditional bluetooth headset market enduring.


However, as the Internet society step by step forward, with the continuous development of intelligent product requirements, the intelligent bluetooth headset is imminent, how to make the headset for a longer life, how to thoroughly liberation hands, as well as how to communicate with people interact with headphones, how to make the headset accurately identify themselves, and so on, a series of new problems brought by the intelligent followed.In the following content, small series will take the intelligent voice control real wireless bluetooth headset solution of runxin technology as a sample to communicate how to better realize these new requirements.


Voice - controlled wireless bluetooth headset


Runxin technology's voice control real wireless bluetooth headset solution, while realizing the interactive function of AI voice control, pays special attention to the design of 'always on' and 'ultra-low delay', which greatly improves the battery life and performance of existing similar TWS headset solutions.This scheme adopts the qualcomm, Ambiq top, top, AAC chip, chip makers integrates multiple widely recognized intelligent algorithm has high precision, with extreme low power SPOT technology, with high quality aptx solution, at the same time, with years of accumulation of high-performance ears independent rf structure design, formed a complete set of TWS Plus acoustic bluetooth headset reference design.


1) ultra-long battery life and ultra-high game experience


Bluetooth headset, especially in-ear TWS bluetooth headset, because of the small amount of batteries, battery life has long been a maximum limits the customer experience, especially increase the various AI algorithm, the original audio bluetooth power consumption will double increase, how to in the process of intelligent and can reduce power consumption, this is a very real problems and needs.


In order to solve this problem, we introduced a SPOT ultra-low power technology Apollo MCU as the main controller, not only to achieve the traditional bluetooth headset function of other functions, but also through this MCU to manage the battery life of the whole device, making the 45mAh battery in a quiet environment to reach more than 5 days of life.


Upon completion of ultra low power design at the same time, in order to maximize the use of the advantage on chip function, this scheme in the design is compatible with the microphone bypass and transfer the two kinds of circuit, without AI algorithm in applications, through the bypass circuit let QCC302X/QCC512X perfectly reflect the high quality and low latency characteristics, aptX wireless bluetooth technology for music fans and gamers super experience.


2) multiple groups of accurate speech interaction


In intelligent terminal products, apple's Siri, amazon's Echo and Google's Google Home are the three most representative artificial intelligence voice assistant technologies on the market.Besides integrating Sensory local voice recognition solution, this project has conducted authentication tests of amazon intelligent voice processing, completed the access of apple's Siri and Google Home, and is the most comprehensive solution of new generation of intelligent voice processing bluetooth headsets.


In terms of local speech recognition, ultra-low power consumption supports high-precision keyword detection in Chinese and English, enabling continuous online monitoring in quiet environment for more than 5 days, continuous online monitoring for about 2 days in noisy environment, and guaranteeing the recognition rate of up to 98% in 10dB SNR environment and up to 80% in 0dB SNR environment.


3) intelligent applications such as bone guide algorithm, hearing aid algorithm and entertainment sound effect algorithm


If the integrated circuit chip is the brain of the equipment, the algorithm is the energy source of the equipment to become intelligent. Only by continuously integrating and improving the algorithm, the equipment can become more and more intelligent.In this scheme, in addition to the local language algorithm described above, bone guide algorithm, hearing aid algorithm and entertainment sound algorithm are also integrated. In addition to intelligence, the application market of earphones is also expanded.


Why the bone conduction algorithm?You can imagine a scenario: on the subway, a group of passengers with earphones of a certain brand are enjoying their alone time, when someone says 'Hi Logo', and the next group of people hear 'hello, master, what can I do for you?Music and video were suspended, is nervous network attack game characters suddenly stopped action...It's amazing how someone's command can make someone else feel as controlled as the puppeteer. That's the effect of undifferentiated voice control.The bone guide algorithm USES sensors to detect vibrations caused by the vocal cords when a person speaks, so as to determine whether the currently detected control command is issued by the wearer, thus avoiding the embarrassing situation in the previous scene.


Hearing aid algorithm is to amplify the sound of people with hearing impairment.Entertainment sound algorithms are used for a variety of games and entertainment scenarios, such as synchronized sound changes, such as adding special background sounds to the original sound.


With all sorts of intelligent scene on the headset products continuously appear, bluetooth headset as a pioneer of intelligent terminal products, both in function and performance will continue to pursue perfection, and perfection, not focused on intelligent and full of product design will be eliminated quickly, this scheme combined the world's top chip, the structure of the algorithm and the headset design team, with nearly a year of time to build, patience to burnish, bulk density for acoustic true wireless bluetooth headset market to launch the complete reference design, promote the further intelligent development of headphones.


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