Meet Pepper, Aldebaran's New Personal Robot With an "Emotion Engine"

The robot will go on sale for less than US $2,000 next year

5 min read

Erico Guizzo is IEEE Spectrum's Digital Innovation Director.

Meet Pepper, Aldebaran's New Personal Robot With an "Emotion Engine"
Photo: SoftBank/Aldebaran Robotics

French robotics company Aldebaran unveiled today its newest robot, a friendly humanoid named Pepper that seems determined to make everyone smile. Pepper talks, gesticulates, and zips by on wheels. And it has an “emotion engine,” designed to understand how people are feeling and react accordingly.

Aldebaran built the robot for SoftBank, the Japanese telecom giant, which plans to start selling it to consumers in Japan next February for 198,000 yen, or about US $1,900. The robot will be produced by Taiwanese electronics manufacturer Foxconn, which makes iPhones and other Apple products.

Pepper won’t help you cook dinner or clean the house. It’s conceived as a communication and companion robot. And apparently it loves to tell jokes.

“Pepper, please explain some of your functions,” said SoftBank chief executive Masayoshi Son as he introduced the robot at an event in Tokyo.

“Masa, I don't want to show off,” Pepper replied, “this might take over 100 hours.”

In the demonstration, the robot moved its body so smoothly that one observer later said it was as if there were a small person inside of it. But Pepper’s actions seemed to have been carefully pre-programmed, so it still remains to be seen how it will behave in real environments.

Son said a lot of effort went into developing the robot's software. The main goal was making Pepper able to recognize people’s emotions by analyzing their speech, facial expressions, and body language, and then deliver appropriate responses. If you look sad, say, Pepper will try to cheer you up by playing one of your favorite songs.

As Son put it, their goal was “giving the robot a heart.”

Starting tomorrow, people can meet Pepper at two SoftBank stores in Tokyo, and more will follow, he said.

Photo: SoftBank/Aldebaran Robotics
Bruno Maisonnier from Aldebaran and Masayoshi Son from SoftBank with Pepper in Tokyo.

Pepper’s creators know they can’t program the robot to behave perfectly in all situations, so they wanted the robot to learn on its own. According to Son, the robots deployed at SoftBank stores will start collecting data on their interactions with people. When Pepper tells a joke, it will observe if people laugh, for example.

The robots will upload their data to a cloud-based repository. This “cloud AI,” as Son called it, will use the combined data to improve Pepper’s behavior. “The robot is going to evolve through this collective wisdom,” he said.

The data collection will continue when Pepper is used in homes. In one example described in the presentation, if the robot reads a book that many kids like, it may suggest that same book to more kids. But Son was careful to emphasize that the cloud system will not collect private information.

As Pepper’s technology improves, SoftBank envisions the robot entertaining people at parties, playing with children, and keeping company to the elderly.


Bruno Maisonnier, founder and CEO of Aldebaran, said that his company worked for more than two years on the project. The result is an impressive feat of engineering.

The robot is 1.2 meter tall and weighs 28 kilograms, and it carries a 10.1-inch touch screen on its chest. It has 20 motors and can move its head, shoulders, elbows, wrists, fingers, hips, and knees. Aldebaran developed a proprietary mechanism to measure electrical current consumption on each motor, allowing the robot to detect forces on its body. In addition, Hall effect sensors are used for motor positioning.

The robot’s head has four microphones, two HD cameras (in the mouth and forehead), and a 3-D depth sensor (behind the eyes). There’s a gyroscope in the torso and touch sensors in the head and hands. The mobile base has two sonars, six lasers, three bumper sensors, and a gyro, and it can drive at up to 3 kilometers per hour [see full specs below].

The robot spoke only in Japanese at the demo, but it can also speak English, French, and Spanish.

Pepper’s battery operates for up to 12 hours, though in the future that may change if Aldebaran equips the robot with legs, a possibility that Son mentioned at the event. Aldebaran has been working on a bipedal robot called Romeo that's of a similar stature, so a walking model may not be too far off.

Source: SoftBank/Aldebaran Robotics

The success of Aldebaran's first robot, NAO, seems to have helped guide the design of the new humanoid. There are more than 5,000 NAOs in 70 countries, used in research, education, and to help sick kids.

Maisonnier said Pepper is different from Nao in size and appearance, but the two robots share many similarities. The two rely on the same software foundation, called NAOqi, which tries to make robot programming easier. Applications developed for NAO are expected to be compatible with Pepper, and vice versa.

Aldebaran plans to open up Pepper to developers (through an API), who’ll be able to create applications that they can offer to other users, much like our smartphone apps, continually expanding the robot’s capabilities.

This robots app strategy is similar to that adopted by other robots such as NEC's PaPeRo and Fujisoft's Palro, which also try to benefit from the rapid adoption of mobile applications.

Aldebaran is planning a developers conference in September to explain in detail the robot and the SDK it will release. “The goal is to have a community of people who want to develop applications to help the robot grow,” Maisonnier said. And he wants not only programmers to participate, but also artists, musicians, and graphic designers.


SoftBank’s plans to market the robot to consumers seem ambitious. Sony’s AIBO, which was also an impressive robot, is a reminder that the personal robotics market is hard to crack. Another cautionary tale is Mitsubishi's failed household robot Wakamaru, which early adopters found to be useless around the home.

Like Pepper, Wakamaru moved on wheels and had two arms with simple gripper hands that were only good for gesturing. This is in stark contrast to robots like Unbounded Robotics' UBR-1 or Toyota's HSR, both of which are designed to accomplish manipulation tasks.

Photo: SoftBank/Aldebaran Robotics
Pepper at a SoftBank store in Tokyo.

In fact, one particular challenge for a new robot like Pepper is making sure that it meets people’s expectations. Son acknowledged the issue during his talk, saying Pepper is not as capable as robots people see in the movies. “But it’s a first step,” he said. And he noted that making Pepper affordable is key for its success, much like what happened with the personal computer.

Still, the price appears incredibly low. “I would expect the price to go up once they have fixed their calculator,” one skeptical roboticist told me. “Pepper will have a very difficult time getting off the ground as a viable consumer product—the demand and compelling need just isn’t there yet,” another robotics observer told PC World.

SoftBank promises the robot's repertoire will improve over time through regular software updates and new apps. And it hopes the robot will be profitable through additional paid services and the cost-savings that come with mass production. Foxconn CEO Terry Gou also made an appearance at the Tokyo event, saying it was an “honor to join Son-san’s baby.”

Son, asked about Google’s interest in robotics, said that Google’s robots and Pepper are targeting different markets. Google wants to increase productivity and its robots will be more costly, he said, adding that Pepper is a robot for homes that will offer fun and entertainment. “We wanted to have a robot that maximizes joy and minimizes sadness.”

Son said he’s dreamed of building robots with emotions since he was a child and became a fan of the Astro Boy series. When he met Maisonnier, the two realized that they share a similar vision of robots becoming helpers and companions to people. Son decided to make an investment in Aldebaran in 2012, and eventually acquired a majority stake in the company.

Maisonnier said personal robots like Pepper will add a new dimension to people’s lives, and they promise to start a revolution as big as the PC, the Internet, and mobile phones. “The same story will repeat again with robotics.”

Evan Ackerman and Jason Falconer contributed to this story.

[ SoftBank ] and [ Aldebaran ]

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