V-Blaze and V-Cloud Online Help (May 2020)

Release Notes

V‑Blaze 7.0.0

V‑Blaze version 7.0.0 is a major release that provides greatly improved ASR speed and accuracy. These performance improvements come from the following enhancements:

  1. Core ASR engine revisions

  2. Language model revisions

    • Integrated TDNN and BLSTM neural-network-based acoustic models with version 7’s North American English (eng1) language models for call center, voicemail, and survey. The use of these models delivers vastly improved performance across all key ASR metrics.

      • Note that language models are distinct from the core ASR engine itself, and hinting is still in development for use with v7 models.

      • Language models available for use with versions 5 and 6 can still be used with version 7 of the ASR engine, but this is not recommended, as they will function at previous performance levels.

  3. Improvements to utterance handling

    • Added utterance merging and the uttmerge parameter. These improvements enable much faster decoding with version 7 models for non-realtime audio.