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Setting up Lexi on Your EEG Encoder

Last Updated August 14, 2020

Lexi™ is a cloud-hosted automatic captioning service provided by EEG that is accessed and controlled from the Lexi page located on your EEG encoder's web interface (as pictured below). This appnote explains the function of each field on the Lexi setup page - allowing you to get Lexi up and running with your EEG encoder.

An EEG Cloud account with an active Lexi subscription is required to connect to Lexi from your encoder. If you do not have an EEG Cloud account or active Lexi subscription and would like to activate Lexi on your EEG encoder, please contact the EEG sales team at or call 516-293-7472.

Lexi also requires iCap™ to be configured and running on your encoder; please see our iCap firewall configuration application note for details. Additionally, your network settings need to allow outbound connections to on port 443, and your encoder must have a valid DNS server configured under the Network tab on its web portal.

Lexi web interface screenshot

Figure 1: Lexi module accessed through the web interface of EEG encoders


EEG Cloud Username and Password: This information is provided when setting up your EEG Cloud account. Again, if you do not have an EEG Cloud account with an active Lexi subscription and would like to activate Lexi on your EEG encoder, please contact the EEG sales team at or call 516-293-7472.

Access Code: Enter the iCap Access Code associated with your EEG encoder - this tells Lexi where to send the captions. Please note that your Access Code must be shared with the iCap company EEGASR via the iCap Admin web site if this has not already been done via factory configuration.


Speech Recognition

Language: The base language models supported by Lexi currently include English-USEnglish-UK, and Spanish.

Topic Models: Through the EEG Cloud web site, you can manage your Lexi account and create Topic Models to further improve accuracy for your unique application. This dropdown box will display all of the Topic Models available under your active EEG Cloud account.


Caption Display

Caption Service: Choose from primary language (CC1/S1) and secondary language (CC3/S2) options.

Number of Rows: The number of rows per roll-up caption can range from 2 to 4.

Vertical Position: CTA-608 base row options range from 2 (top of the screen) to 15 (bottom of the screen).

Horizontal Position: Choose a left horizontal offset from 0 to 28 characters.

Force Capital Letters: When enabled, all captions will be written in upper-case.

Use Lexi Vision Positioning: Automatically position captions based on Lexi Vision's detection of on-screen text, faces, and other items that should not be covered with captions.


Lexi Status

Status: This will display the state of the Lexi job if one has been started, or else it will indicate that Lexi is not running on the selected Access Code.

Version: This field will display the current version of the Lexi software running on the encoder.


Lexi Client

Enable Module: The Lexi module must be enabled in order for the encoder to communicate with Lexi and receive captions from the cloud.

Activation Mode: When "Always active" is selected, a Lexi captioning job will be started immediately upon enabling the client module. When "Require GPI-E" is selected, a Lexi captioning job will start when GPI-E is asserted and will run until GPI-E is de-asserted.

Inactivity Timeout: A Lexi job that runs for this amount of time without any dialog being transcribed will be terminated automatically by the server. Set to "None" if you want jobs to be able to run indefinitely without dialog.

Block Lexi on Upstream Captions: Setting this to "Yes" will ensure that Lexi will not generate captions when upstream data is present. The time in parentheses indicates how long upstream captions will have to be absent in order for Lexi to start up again.

Monitor Service with GPO 2: When selected, GPO 2 will be active when Lexi is captioning to the selected Access Code, and will be inactive otherwise.