Speech Tuner Tester


The Speech Tuner Tester makes changing grammars or other Speech Engine parameters secure, faster, and more accurate. The Speech Tuner allows you to use historical data to validate changes, ensuring the creation of a successful application.

Most tuning tools passively log views calling for changes to be made in the live speech recognition application requiring retesting over a period of time with live callers.

The LumenVox Speech Tuner is able to send changes back through the Speech Engine, simulating the recognition process and evaluating changes instantly. Instead of slow, non–interactive, static tuning, the Speech Tuner enables on–the–fly, highly interactive, dynamic tuning.

Make a change, do the test, get the results.

Test Results Screen

What Does the Tester Do?

Grammar Evaluation

Speech can be evaluated against one or more grammar files similar to how the Speech Engine does in a production speech recognition system. Using the Speech Tuner's grammar editing tools, a grammar can be adjusted and re–tested to review if changes improve performance. This allows instantaneous grammar changes to improve speech recognition accuracy.

Performance Rate

The Speech Tuner rates performance against commonly accepted measures like WER (Word Error Rate). This helps give an accurate picture of details like average confidence scores, correct versus incorrect responses and in-grammar versus out–of–grammar performance.

Performance Rate also provides detailed information about an application's performance confidence scoring making understanding confidence scores easier. Simple graphs display the range of confidence scores for correct, incorrect, and out–of–grammar responses. The Speech Tuner will even calculate optimal confidence thresholds for a specific menu or application, taking the guesswork out of setting thresholds.

Parameter Evaluation

Changing Speech Engine parameters optimizes the Speech Engine performance, further improving the caller experience. Traditionally, changing Engine parameters has been a difficult and time–consuming task, often requiring long delays between changing a parameter and evaluating its effect on performance. The LumenVox Speech Tuner shortens this delay by offering dynamic testing capability. Speech Engine parameters such as search optimizations, speech end–pointing, and NBest result processing can easily be adjusted and immediately re–tested and re–scored from within the testing component.

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