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Google SR Plugin 1.15.0 Released

Google Speech Recognition (GSR) Plugin 1.15.0 to the UniMRCP Server (UMS) has been released.

The plugin is based on the following components:

  • UniMRCP Server 1.6.0
  • Google Speech-to-Text API v1
  • gRPC 1.20.0
  • Protobuf 3.7.0

The binaries are currently available for the following Linux distributions:

  • Red Hat / CentOS 7 (unimrcp-gsr-1.6.6-1.el7.x86_64.rpm)
  • Ubuntu 16.04 LTS (unimrcp-gsr_1.6.6-xenial_amd64.deb)
  • Ubuntu 18.04 LTS (unimrcp-gsr_1.6.6-bionic_amd64.deb)

This release introduces numerous supplementary features and enhancements to the existing functionality.

The detailed list of changes introduced in this release follows.
New Features
  • Made service URI configurable mostly to allow to specify not only the address but also the port number of the service, which is required when UniMRCP server is behind TMG HTTP proxy.
  • If a configuration parameter 'use-logging-tag' is set to 'true', the header field Logging-Tag, if specified, is used as a suffix while composing file names of utterances and RDRs.
  • If a configuration parameter 'stream-creation-timeout' is specified, a timer is set to track gRPC stream creation. If the service is unavailable or cannot be reached due to a network problem, the timer allows to respond with an error in a timely manner without waiting for expiration of the default gRPC deadline.
  • Implemented redirection of logs produced by the gRPC library. This feature is disabled by default and can be controlled by new configuration parameter 'grpc-log-redirection', 'grpc-log-verbosity' and 'grpc-log-trace'.
  • Added support for HTTP proxy in communication with license servers available as a service.
  • Added support for certain vendor-specific parameters, including 'speech-start-timeout'. See section 4.7 in the Usage Guide.
  • Made default SRGS XML scope configurable. By default, the scope is considered as 'strict' but can implicitly be used as 'hint', if a new configuration parameter 'match-srgs' is set to 'false'.
Fixed Problems
  • Compose the header field Waveform-URI based on the protocol version. Before, the format defined in MRCPv2 was used unconditionally.
Configuration Parameters
  • Added a new attribute 'service-uri' to the element 'streaming-recognition'. The attribute defaults to 'speech.googleapis.com' and can also be set to 'speech.googleapis.com:443'.
  • Added new attribute 'match-srgs' to the element 'streaming-recognition'. The attribute defaults to 'true'.
  • Added a new attribute 'stream-creation-timeout' to the element 'streaming-recognition'. The attribute defaults to 0 (unset).
  • Added new attributes 'grpc-log-redirection', 'grpc-log-verbosity' and 'grpc-log-trace' to the element 'streaming-recognition'.
  • Added new attributes 'http-proxy-address' and 'http-proxy-port' to the element 'license-server'.
  • Added new attribute 'use-logging-tag' to the elements 'utterance-manager' and 'rdr-manager'.
  • Updated the Usage Guide to reflect the changes introduced in this release.

Visit the GSR plugin page for more information.


Thank you for using UniMRCP.

Arsen Chaloyan
Author of UniMRCP

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