Robots cute but what have they done for us lately? |  Tech & society, Tech & society

The faces of kids and adults light up the first time they see Sony Corp.'s Aibo or Honda Motor Co. Ltd.'s Asimo robots as the robots' demeanor and life-like movements bring a smile to almost every face. But wait a second. Cute as they are, whatever happened to The Jetson's ideal of an army of robots to do our cleaning, water our plants and wash our car?

To date, the cost of developing and building robots has meant that, around the home at least, they are much more suited to entertaining than doing the types of complex work that you or I do everyday, but that may be changing. Researchers at several companies in Japan are working on robots that perform simple tasks and can help around the home.

One such project has been going on for just over five years at NEC Corp.'s Central Research Laboratory here in the leafy Tokyo suburbs.

Everything started when a group of researchers studying a diverse range of applications, such as speech recognition and optical sensing, realized they could put all of this together to build a robot, said Yoshihiro Fujita, senior manager at the lab's Personal Robot Center. The first product of the project was the R100, which was unveiled in August 1999. Almost two years later, in March 2001, a smaller, more intelligent successor called PaPeRo was announced.

PaPeRo stands 38 centimeters high and has a round body, 25 centimeters in diameter.

"It is basically a notebook computer with some sensors, a case and a few motors for movement," said Fujita. The researchers decided to use this simple design because they are more interested in the human-computer interface technology than cracking challenges of mechanical technology to make the device look more like a person or pet.

A pair of CCD (charge coupled device) cameras act as eyes for PaPeRo. It is through these that the robot senses its surroundings, the location of major obstacles and also recognizes up to 10 people. Four microphones act as its ears, three for sound direction detection and one for voice recognition. The major interface to PaPeRo is through speech and it can recognize up to 650 phrases.

Through a combination of these functions, things start to get interesting. During a demonstration, the robot recognized Fujita and was able to carry out some small talk before being ordered to take a message. The function is something like an audio mail and PaPeRo will store it until he meets the person it was intended for, and then play the message back.

Its talents don't stop there.

"PaPeRo, switch on the TV," Fujitsu said and a couple of seconds later a TV in the room came to life. "NHK," Fujita said, mentioning the name of Tokyo's channel 1, and PaPeRo switched the TV to the channel using an infrared controller buried inside its body. "TBS," and the TV switched to channel 6, "Fuji," and PaPeRo switched the TV to channel 8, and so it went.

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