Yandex SR Plugin 1.6.0 Released

[Arsen Chaloyan]

Yandex Speech Recognition (SR) Plugin 1.6.0 to the UniMRCP Server (UMS) has been released.

The plugin is based on the following components:

• UniMRCP Server 1.7.0
• Yandex SpeechKit Speech to Text API v2
• gRPC 1.30.2
• Protobuf 3.12.2
• Libevent 2.1.9
• Rapidjson 1.1.0

The binaries are currently available for the following Linux distributions:

• Red Hat / CentOS 7 (unimrcp-yandex-sr-1.7.1-1.el7.x86_64.rpm)
• Ubuntu 16.04 LTS (unimrcp-yandex-sr_1.7.1-xenial_amd64.deb)
• Ubuntu 18.04 LTS (unimrcp-yandex-sr_1.7.1-bionic_amd64.deb)

This release is built against newer versions of gRPC, Protobuf and Yandex/Google APIs. The release introduces numerous supplementary features and enhancements to the existing functionality.

The detailed list of changes introduced in this release follows.

New Features

• Added support for profanity-filter.
• 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'.
• Added support for inter-result timeout. If the specified timeout is elapsed, input is considered complete. The timeout defaults to 0 (disabled) and can be overridden per recognition request.

Fixed Problems

• Compose the header field Waveform-URI based on the protocol version. Before, the format defined in MRCPv2 was used unconditionally.
• Set HTTP Proxy settings not only for gRPC but also for authentication requests.
• Replaced 'x-request-id' with 'x-client-request-id' and 'x-enable-data-logging' with 'x-data-logging-enabled' to reflect the changes in Yandex SpeechKit API.
• Changed processing of end of utterance to reflect the changes in Yandex SpeechKit API.

Configuration Parameters

• 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'.
• Added a new attribute 'inter-result-timeout' to the element 'streaming-recognition'.
• Changed default values of 'speech-incomplete-timeout' from 3000 msec to 15000 msec and 'input-timeout' from 10000 msec to 30000 msec.

Miscellaneous

• Upgraded the gRPC library from 1.20.0 to 1.30.2 version.
• Upgraded the Protobuf library from 3.7.0 to 3.12.2 version.
• Added dependency from Google APIs used internally by Yandex APIs.
• Updated the Usage Guide to reflect the changes introduced in this release.

Visit the Yandex SR plugin page for more information.

http://www.unimrcp.org/ysr

Thank you for using UniMRCP.

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