LumenVox 12.2 Release

Wednesday, August 20, 2014 - 11:27

LumenVox version 12.2, scheduled for release on Tuesday, Sept. 2, has a large number of exciting new changes. In particular, the Tuner is getting a major series of improvements, and some cool new changes have been added throughout.

From almost to to bottom, we have looked at how we can improve the usefulness of the LumenVox Speech Tuner. One of the first things we realized is that many users have trouble figuring out what they need to tune the most.

Analyzing by Menu

Loading data into the Tuner can be overwhelming, so we added a new concept to the Tuner called a menu. A menu is designed to allow you to filter data so you can tune a specific menu in an IVR or speech application.

The way this works is the Tuner analyzes the grammar files that were in use for each speech interaction. A main menu in a banking application might use the following grammars:

  • main_menu_commands.grxml
  • account_types.grxml
  • global_help.grxml

And a "transfer funds" menu might use:

  • currency.grxml
  • account_types.grxml
  • transfer_commands.grxml
  • global_help.grxml

Because the Tuner knows which grammars are active for which speech interactions, it can make logical inferences about which interactions should be grouped together. That grouping is the menu system. A new dropdown allows you to select from the various menus the Tuner recognizes and just pick the one you'd like to focus on.

Tuner Wizards

New to the 12.2 are Tuner Wizards, a series of automated tools that guide you through the process of identifying problems and focusing on the relevant data. You can fire up the new Tuning wizard, pick a menu (or all of the data), and choose from a list of options to focus on. That list includes:

  • Confidence Threshold Tuning
  • Accuracy Tuning
  • Out-of-Grammar Tuning
  • Out-of-Coverage Tuning
  • No-Input Tuning
  • Decode Speed Tuning
  • Decode Failure Tuning

The Tuning Wizard will let you know whether your data exhibits any problems related to these issues and then will help you identify which interactions contribute to the particular type of issues you're facing. It's a great way to focus your time so that you only pay attention to the items most relevant to you.

Grammar Editor Changes

The Grammar Editor is a long-standing feature in the Tuner, giving developers an easy way to build, edit, and test their grammars. Several new features enhance the capabilities even further:

  • Multiple grammar parses. Previously, the Grammar Editor could only parse a sentence against a single grammar at a time. A new option allows developers to parse any combination of loaded grammars, making it easier to test how combinations of grammars will affect grammar coverage.
  • Pronunciation Checker. A new module called the Pronunciation Checker shows where pronuncations for grammar items come from: are they in our built-in dictionary? A user-defined lexicon? Or are they being produced by our statistical pronuncation rules? Words which don't have good pronunciation definitions often lead to errors in recognition, so this is a useful module for troubleshooting performance.
  • Random Sentence Generator. This module generates 10 random sentences at a time that are allowed by the grammar. Using it, you can check grammar coverage to make sure that the words and phrases you expect to be in grammar are, while simultaneously ensuring that phrases you don't expect to be in grammar are not.