Soon, deaf and dumb can talk on mobile using sign language

 A revolution is in the offing for deaf and hearing-impaired people with scientists testing a new mobile device which they claim will transmit American Sign Language over cellular networks.

Developed by engineers at the University of Washington (UW), MobileASL uses motion detection technology to identify American Sign Language (ASL) and transmit video images over cell networks in the US.

The tool, which can be integrated to any high-end mobile phone with a video camera, is undergoing field tests involving 11 participants and the researchers plan to launch a larger field study this winter.

"This is the first study of how deaf people in the US use mobile video phones," said project leader Eve Riskin, a UW professor of electrical engineering.

According to the university, the engineers are now working to optimise compressed video signals for sign language, increasing the quality of the images around the face and hands to reduce the data rate to 30 kilobytes per second.

To minimise the amount of battery power, the MobileASL phones employ motion sensors to determine whether sign language is being used, it said.

Transmitting sign language as efficiently as possible increases affordability, improves reliability on slower networks and extends battery life, even on devices that might have the capacity to deliver higher quality video.

And the field test is allowing the team to see how people use the tool in their daily lives and what obstacles they encounter.

"We know these phones work in a lab setting, but conditions are different in people's everyday lives," Riskin said. "The field study is an important step toward putting this technology into practice."

Texting or e-mail is currently the preferred method for distance communication of deaf and hearing-impaired people. But the participants' experiences with the MobileASL phone are, in general, positive.