SK Telecom Introduces Artificial Intelligence Service NUGU
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SK Telecom Introduces Artificial Intelligence Service NUGU
NUGU is first virtual assistant service that understands Korean language, by developing and applying advanced voice recognition technologies, natural language processing engine and deep learning technology

03(Mon), Oct, 2016

Models promote NUGU, an artificial intelligence service based on voice recognition technology, SK Telecom has introduced. (Photo: SK Telecom)

SK Telecom has introduced NUGU, an artificial intelligence (A.I.) service based on voice recognition technology, to make A.I. an important part of our daily lives. The company has also shared plans to further develop its A.I. platform and services in cooperation with third party developers and customers, at a news conference held at the company’s headquarters in Uljiro, downtown Seoul, on Aug. 31. The service name “NUGU” is a Korean word for “who and has been chosen to create an image that it can become anyone - i.e. a user’s friend, family, assistant and so on.

NUGU, which made its debut on Sept. 1, marks the first virtual home assistant service that understands and processes the Korean language. With the aim to create an intelligent voice assistant that can interact in Korean, SK Telecom began developing advanced technologies in areas including artificial intelligence, speech recognition and natural language processing since 2012. In particular, NUGU boasts the best voice recognition rate in Korea, understanding various voice tones, accent and dialects, and through the application of SK Telecom’s self-developed natural language processing engine, it is capable of interpreting what the user has actually said and interacts with the user by voice.

NUGU will be first realized through a stylish, white, 21.9cm tall cylinder-shaped device also built to work as a home speaker and LED lighting. In particular, with the participation of Astell & Kern in optimizing the speaker sound quality, the NUGU-dedicated device delivers a strong performance as a home speaker with 15 Watt, 2.5-inch woofer, 2-inch tweeter.

NUGU is connected to the cloud via Wi-Fi. After recognizing the user’s voice and understanding his/her intentions through natural conversations, NUGU provides a wide variety of services including music service (music recommendation and playback), smart home service (control of smart home devices including smart electric plug, gas valve lock, air purifier, and dehumidifier) and assistant service (weather information, schedule notification, smartphone location tracking, etc.).

Users can initiate a dialogue with NUGU by using one of the four wake words (Aria, Crystal, Rebecca, and Tinkerbell) and then make voice requests to NUGU. For instance, when the user says “Aria, play me some happy music,” NUGU will instantly play a list of upbeat songs, and answer a user’s questions regarding these songs (title, singer, etc.). Also, when the user asks, “Aria, I am going to the baseball park tomorrow. How will the weather be tomorrow in Incheon?” NUGU will deliver weather forecasts for that specific area in a spoken response.

Through the application of a cloud-based deep-learning framework, NUGU is designed to evolve by itself. NUGU will be able to strengthen its own performance - including speech recognition accuracy - with the growing number of customers who use the service.

Moreover, SK Telecom plans to constantly enhance NUGU’s functionality through over-the-air (OTA) software updates. In particular, to meet customers’ varying needs, the company will add new and diverse functionalities, including voice-enabled commerce services like internet shopping and food delivery, real-time traffic/transportation information service linked to T Map (Korea’s top mobile navigation service provided by SK Telecom), and media services such as internet radio, news and audiobook player.

Besides the speaker-type NUGU-dedicated device, SK Telecom also plans to combine its NUGU service with diverse types of devices, such as in-vehicle IoT device, wearable IoT device and humanoid robot, so as to evolve NUGU into an artificial platform that delivers unprecedented value and convenience to every part of people’s lives. Furthermore, in the first half of 2017, SK Telecom will open NUGU’s Application Programming Interfaces (APIs) to boost the creation of an ecosystem surrounding NUGU by working closely with diverse startups, SMEs and experts in the field of artificial intelligence to develop NUGU-related services.

The NUGU-dedicated device can be purchased at the NUGU homepage ( and online shopping site 11st ( Customers who participate in SK Telecom’s special launch event designed to boost the use of NUGU will be able to purchase the NUGU device at a special discount price of 99,000 won until October 30, and at 149,000 won from Nov. 1 to Dec. 31, 2016. The NUGU-dedicated device is priced at 249,000 won.

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