LumenVox containerized microservices

At the heart of the LumenVox modern, cloud-native offering are the microservices in a containerized architecture.

This section provides insight into the various LumenVox containers which can be used for troubleshooting purposes.

The list of available of basic pods (containers) is:

Admin-portal
Archive
Asr
Audit
Binary Storage
Biometric-active
Biometric-api
Biometric-active
Biometric-identity
Configuration
Deployment
Deployment-portal
Grammar
ITN
License
LumenVox-api
Management-api
Persistent-volume-directory-setup
Reporting
Reporting-api
Reporting-bio-api
Resource
Session
Transaction
Tts
Vad

Admin-portal

This service manages the web portal for the cluster admin and supports the setup of each licensed tenant with their connection strings, encryption, and passwords to services and databases.

Asr

This is the ASR DNN engine. It is linked with the session manager, and it processes all ASR & Transcription transactions. Results are placed in Redis for retrieval. It receives messages from RabbitMQ on what audio needs to be processed. The latest version ships with our new DNN ASR engine providing better performance and accuracy. The new engine also offers enhanced features like aliases, dialect specific processing, improved scoring algorithm, enhanced transcription, phrase lists and weighting. The new engine is much faster utilizing less resources than its predecessor thus making scaling more manageable.

Audit

This service connects to audit database in PostgreSQL. This is used by the voice biometric services only. It is used to audit modifications to configurations the configuration, deployment, and biometric identity tables.

Binary Storage

Connects to MongoDB and reads/writes from/to the MongoDB. It is also responsible for the encryption/decryption of data stored within Mongo. This includes audio files and grammars.

Biometric-active

This is the Voice Biometric active DNN engine and is responsible for all active voice biometrics processing receiving requests from the biometric APIs

Biometric-api

This is the REST interface for active voice biometrics. It provides APIs for enrollment, verification, and identity management. This service talks to the deployment, configuration, binary service, active verifier and to lumenvox API services (for text validation).

Biometric-identity

Responsible for managing the identities for the active engine for voice biometrics. It is also responsible for maintaining the links between identities and enrollments.

Configuration

Responsible for managing the configuration for various deployments for voice biometrics only. It receives input via JSON. And manages the retrieval of enrollment and verification configurations from the PostgreSQL database.

Deployment

This service manages deployments within the cluster. For each deployment, it maintains the list of configurations and connection strings along with any other data specific to a deployment. It also handles encryption and encryption keys along with key rotation. The service is also used to manage the deployment e.g., create a new deployment Id, and export/import deployment information.

The cluster master key gets created when the deployment service starts for the first time and is stored in the database. The cluster master key is encrypted with the cluster GUID. The customer keys are then created for each deployment. These are encrypted using the cluster master key.

Deployment-portal

This service manages the web portal for the tenant admins. It facilitates the tenants to access their own deployment. The service supports the customization of configurations and manages the diagnostic tests.

Grammar manager

The new Grammar management service co-ordinates the grammar compilation, caching, parsing & DTMF processing for ASR & Transcription transactions. It is also instrumental in CPA & AMD transactions; grammar storage, retrieval & housekeeping and handling of global grammars and phrase lists.

ITN

This service manages all text normalization functions including inverse text normalization, punctuation & capitalization and redaction on Transcription interactions.

License

This service manages the licensing of the deployments. It validates each deployment against the LumenVox licensing server. The licensing service is responsible for making a deployment as valid, if not, the various APIs will not function.

It also collects counters for transactions for all products and communicates this to the centralized LumenVox licensing service for billing and product usage monitoring.

LumenVox-api

This service supports the Speech APIs made available to clients to process transactions for speech products including ASR, TTS, CPA and AMD using gRPC.

Management-api

This facilitates the use of the REST management APIs and is a wrapper around deployment and configuration services which allows customers to manage these.

Persistent-volume-directory-setup

This service is used to create the connection to the persistent volume. It is not a service that runs continuously. It is used to update resources e.g., DNN language models in the persistent storage.

Reporting

This service is used for voice biometrics to generate the reports and make the extracted data available to the reporting APIs

Reporting-api

This facilitates the speech reporting APIs using gRPC and is used for the Analysis portal.

Reporting-bio-api

This REST interface is used to connect to the reporting services and expose reports to the client for voice biometrics.

Resource

This service downloads the public language packs to the cluster for ASR, TTS, and voice biometrics. It stores the languages packs into the shared volume for the cluster and makes resources available to each service as needed.

Session

Currently used for speech products only. It manages the sessions and interactions and acts as a dispatcher between the LumenVox API service and other services.

Transaction

This service is responsible for writing voice biometric transactions into the database. Voice biometric sessions are stored in Redis until the session is completed, when the transaction service receives a message to retrieve data and write the session and transaction data to the PostgreSQL database. This service is also used for operations reporting where each API call to the biometric interface is logged as an operation and stored for audit purposes.

Tts

This is used for the TTS engine.

Vad

This is the media service that manages the VAD algorithm and assists with transcription audio streaming.

LumenVox Microservices Diagram - the following is an architecture diagram that Includes all services.

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