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Rewriting the grammar software and exploring the VAD settings took several months. During this time, Redmond updated its application to use the LumenVox Speech Engine for digit recognition. The results were noticeable immediately.

Better still, after a few more months of working together, LumenVox was able to use the audio that Redmond gave it to rebuild its South American Spanish acoustic model. Using audio from actual users of ChevyStar, the application was now seeing the type of recognition accuracy that GM had been hoping for.

Accuracy Gains Chart

In fact, once the accuracy data from the start of the project was compared against the test data after the tuning and new acoustic model, Redmond and LumenVox found that there was a 42% increase in correct recognitions. "The results were excellent," Berdinas said.

Later that year, Redmond switched all of ChevyStar's speech recognition to the LumenVox Engine.

"We were thrilled that Redmond Software gave LumenVox the opportunity to help them on this problem," said Edward Miller, president of LumenVox. "In the end, not only did our teamwork deliver outstanding results, but we now have a Spanish acoustic model that we're proud of. Our product offering is better for having worked with Redmund."

Edward Miller

ChevyStar Logo

For more information about ChevyStar, go to: http://www.chevystar.com.ve/.

Redmond Software Logo

For more information about Redmond Software, go to: http://www.redmondsoftware.com.

HOW A SPEECH ENGINE WORKS

  • A speech engine loads a list of words to be recognized. This list of words is called a grammar. Audio from a speaker is captured by a microphone or telephone. This audio is turned into a waveform, a mathematical representation of sound. The engine then determines which words in the grammar the audio most closely matches and returns as a result.
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COMPANY OVERVIEW

  • ChevyStar Logo
  • ChevyStar is a service that uses a GM vehicle's built–in cellular phone, GPS, microphone and speakers. It allows for hands–free phone calling and GPS navigation, security features and remote vehicle diagnostics. Computers with sensors on the car's hardware (brakes, airbag, engine, etc.) communicate via the cellular network to the ChevyStar support centers in the event that maintenance is needed, there's been an accident, or for personal assistance like remote keyless entry. They've recently deployed a stolen vehicle shutdown system, which disables the vehicle if it's reported stolen.

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  • Toll Free: (877) 977–0707,
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