Azure SR Plugin 1.21.0 Released

[Arsen Chaloyan]

Microsoft Azure Speech Recognition (SR) Plugin 1.21.0 to the UniMRCP Server (UMS) has been released.

The plugin is based on the following components:

• UniMRCP Server 1.7.0
• Microsoft Speech WebSocket Protocol
• Libevent 2.1.9
• Rapidjson 1.1.0

The plugin supports the following endpoints:

• Speech Service (regional)
• Custom Speech Service (regional)
• Speech Service (containerized)
• Custom Speech Service (containerized)
• Speech Service (private)
• Custom Speech Service (private)

The binaries are currently available for the following Linux distributions:

• Red Hat / CentOS 7 (unimrcp-azure-sr-1.7.13-1.el7.x86_64.rpm)
• Red Hat / CentOS 8 (unimrcp-azure-sr-1.7.13-1.el7.x86_64.rpm)
• Ubuntu 18.04 LTS (unimrcp-azure-sr_1.7.13-bionic_amd64.deb)
• Ubuntu 20.04 LTS (unimrcp-azure-sr_1.7.13-focal_amd64.deb)

This release provides a few improvements and fixes.

The detailed list of changes introduced in this release follows.

New Features

• If/when the Websocket connection is unexpectedly closed by the service while a RECOGNIZE request is in-progress, allow to implicitly reconnect to the service (auto-reconnect), optionally restream the last audio data chunks (max-audio-data-chunks) and continue processing of the in-progress request.
• Allow to set maximum duration on a Websocket connection.
• Added support for sorting result alternatives based on confidence score (the highest first).
• Made separator of built-in grammar parameters configurable.
• Set the SSL security level to 1 by default. This setting applies to the use of the license server on Ubuntu 20.04 and does not affect other supported distributions.

Fixed Problems

• Fixed a possible memory leak occurred when two file entries (waveforms and/or RDRs) have the same creation time, which is a very rare occasion not involved in the regular operation.

Configuration Parameters

• Added new attributes 'auto-reconnect' and 'max-audio-data-chunks' to the element 'ws-streaming-recognition'.
• Added a new attribute 'max-connection-duration' to the element 'ws-streaming-recognition'.
• Added a new attribute 'sort-alternatives' to the element 'ws-streaming-recognition'.
• Added a new attribute 'grammar-param-separator' to the element 'ws-streaming-recognition'.
• Added a new attribute 'security-level' to the element 'license-server'.

Miscellaneous

• Updated the Usage Guide to reflect the changes introduced in this release.

Visit the Azure SR plugin page for more information.

• https://unispeech.io/azsr
  
• https://www.unimrcp.org/azsr
  

Thank you for using UniMRCP.

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Arsen Chaloyan
Author of UniMRCP
http://www.unimrcp.org