@symblai/symbl-chime-adapter
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1.1.1 • Public • Published

Symbl.ai for Amazon Chime's Adapter

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Symbl's APIs empower developers to enable:

  • Real-time analysis of free-flowing discussions to automatically surface highly relevant summary discussion topics, contextual insights, suggestive action items, follow-ups, decisions, and questions, Topics and Trackers\
  • Voice APIs that makes it easy to add AI-powered conversational intelligence to either telephony or WebSocket interfaces.
  • Conversation APIs that provide a REST interface for managing and processing your conversation data.
  • Summary UI with a fully customizable and editable reference experience that indexes a searchable transcript and shows generated actionable insights, topics, timecodes, and speaker information.

Enable Symbl.ai to Run on Your Amazon Chime's Adapter

Enable Symbl.ai's real-time WebSocket's adapter for Amazon Chime

Setup

Sign up for a free account at Symbl.ai here. If you are new to Symbl.a, check out the introduction on the docs or feel free to try out APIs with Postman.

Integration

Install symbl-chime-adapter

To get started you will need to add the symbl-chime-adapter to your node dependencies.

npm install --save symbl-chime-adapter

Symbl Credentials

Create an account in the Symbl Console if you have not done so already.

After you login, you will find your appId and appSecret on the home page.

Create a .env file in demos/browser and demos/serverless/src that includes your appId and appSecret as shown below.

SYMBL_APP_ID=<xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
SYMBL_APP_SECRET=<xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

The App ID and App Secret are used to authenticate your session with Symbl by generating an access token.

Your App ID and Secret should not be shared or posted publicly.

Initialization

The Symbl adapter should be initialized after connecting to your Chime video conference.

To connect each Chime participant to Symbl, it is best practice to generate the client’s access token on your backend service.

After the token is generated it can be returned along with the chime meeting configuration as shown below. For a full example of this, please see this page of our chime demo application.

const res = await fetch(`https://api.symbl.ai/oauth2/token:generate`, {
      method: 'POST',
      mode: 'cors',
      cache: 'no-cache',
      credentials: 'same-origin',
      headers: {
        'Content-Type': 'application/json',
      },
      redirect: 'follow',
      referrerPolicy: 'no-referrer',
      body: JSON.stringify({
        type: 'application',
        appId: symblAppId,
        appSecret: symblAppSecret,
      }),
    });
    accessToken = await res.json();

    return response(200, 'application/json', JSON.stringify({
    JoinInfo: {
      Meeting: meeting,
      Attendee: attendee,
      Symbl: accessToken,
    },
  }, null, 2));
};

After the token is generated and returned by your server, the Symbl Access Token can be applied by setting the static property ACCESS_TOKEN of the Symbl class.

Symbl.ACCESS_TOKEN = joinInfo.Symbl.accessToken;

After the access token has been set and your client has joined the Chime meeting, you can instantiate the Symbl class.

The Symbl constructor takes two parameters:

chime

Field Type Description
attendeeId string Attendee unique identifier
userName string Attendee name
meetingId string Unique meeting identifier
meeting string Name of meeting

options

Field Type Description
confidenceThreshold double default: 0.5 - Minimum required confidence for insight to be recognized.
languageCode array Array of comma separated strings. Valid language codes en-US, en-GB, en-AU, it-IT, nl-NL, fr-FR, fr-CA, de-DE, es-US, ja-JP
insightsEnabled boolean default: true - True if insights should be generated for conversation.
trackers array default: [] - To enable trackers add to the Tracker list set of name and phrases to be found in a conversation.
topics Always enabled - Topics should be generated for conversation.

Whether or not to generate insights.

  this.symbl = new Symbl(
      {
          attendeeId: this.configuration.credentials.attendeeId,
          userName: this.configuration.credentials.externalUserId.split('#').pop(),
          meetingId: this.configuration.credentials.meetingId,
          meeting: this.meeting,
      }, {
          confidenceThreshold: 0.5,
          languageCode: 'en-US',
          insightsEnabled: true,
          trackers: [            //Various dictionaries of differnt name values and vocabulary values can be passed here
                        {
                            name: "COVID-19",
                            vocabulary: [
                                "social distancing",
                                "cover your face with mask",
                                "vaccination"
                            ]
                        }
                    ],
      }
  );
  // subscribe to realtime event publishers (see below)
  this.symbl.start();

Subscribe to Realtime Events

Learn how to subscribe to Symbl’s conversational insights and transcription.

There are five different event types that you can subscribe through with Symbl’s Conversational AI Adapter for Chime.

  • Closed Captions
  • Transcripts
  • Insights
  • Topics
  • Trackers

Closed Captions

Realtime closed captioning is enabled by default and provides realtime transcription of your audio content. Closed captioning tracks can be added to any video element through the callback handler to your Symbl instance.

Handler

Field Type Description
id string Insight ID
text string Insight content
asignee object Assignee Object

The handler can be added using the subscribeToCaptioningEvents function of the Symbl instance.

const captioningHandler = {
    onCaptioningToggled: (ccEnabled: boolean) => {
        // Implement
    },
    onCaptionCreated: (caption: Caption) => {
        console.warn('Caption created', caption);
        // Retrieve the video element that you wish to add the subtitle tracks to.
        const activeVideoElement = getActiveVideoElement() as HTMLVideoElement;
        if (activeVideoElement) {
            caption.setVideoElement(activeVideoElement);
        }
    },
    onCaptionUpdated: (caption: Caption) => {
        const activeVideoElement = getActiveVideoElement() as HTMLVideoElement;

        caption.setVideoElement(activeVideoElement);
    },
};
symbl.subscribeToCaptioningEvents(captioningHandler);

Setting the video element that subtitles will be superimposed over should be done by calling the setVideoElement function on the Caption class.

If your video chat application has alternating primary video tiles, this can be used to change which element is active.

Realtime Insights

Realtime insights are generated as Symbl processes the conversation in your video chat platform.

When an Insight is detected by Symbl and the onInsightCreated event is emitted, an Insight object is passed to the callback function provided in the Insight handler.

The Insight class holds data about the insight generated.

Insight Class Attributes

Field Type Description
id string Insight ID
text string Insight content
asignee object Assignee Object

Handler

The Symbl adapter exposes a handler function, subscribeToInsightEvents, that has a callback function onInsightCreated.

Insights are enabled by default, but can be manually disabled through the insightsEnabled parameter in the config of the Symbl constructor.

new Symbl(chimeConfiguration, {insightsEnabled: true});

Subscribing to the Insight publisher is achieved by passing a handler to the subscribeToInsightEvents function of your Symbl instance.

Example

When an insight event is emitted from the onInsightCreated handler, you can use the Insight object returned and either use the createElement function to create a default element or you can use the data included in the Insight object returned in the handlers callback to create your own element, capture the data and store as a metric, etc…

const insightHandler = {
    onInsightCreated: (insight: Insight) => {

        // Creates a predesigned insight element
        const element = insight.createElement();

        // Customize any styling
        element.classList.add('mx-auto');
        element.style.width = '98%';

        /** OR create your own element
        insight.element = document.createElement('div');
        insight.element.innerHTML = `<div style="width: auto; height: 400px">
                                 <h3 style="font-width: 400;">
                                     ${insight.type}
                                 </h3>
                                 <br>
                                 <h2>
                                     ${insight.text}
                                 </h2>
                              </div>`;          
        **/

        // Retrieve container you wish to add insights to.
        const insightContainer = document.getElementById('receive-insight');

        // Call add on the insight object to add it to DIV
        insight.add(insightContainer);
    }
};
// Subscribe to realtime insight events using the handler created above
this.symbl.subscribeToInsightEvents(insightHandler);

Realtime Topics

Realtime topics are generated as Symbl processes the conversation in your video chat platform.

When a topic is detected by Symbl and the onTopicCreated event is emitted, an Insight object is passed to the callback function provided in the Topic handler.

The Topic class holds data about the topic generated.

Topic Class Attributes

Field Type Description
phrases string Topic name
score number Topic score

Handler

The Symbl adapter exposes a handler function, subscribeToTopicEvents, that has a callback function onTopicCreated.

Topics are enabled by default.

Subscribing to the Topic publisher is achieved by passing a handler to the subscribeToTopicEvents function of your Symbl instance.

Example

When an topic event is emitted from the onTopicCreated handler, you can use the Topic object returned and either use the createElement function to create a default element or you can use the data included in the Topic object returned in the handlers callback to create your own element, capture the data and store as a metric, etc…

        const topicHandler = {
            onTopicCreated: (topic: Topic) => {
                //Random font color for new topic
                const content = topic.phrases;
                const score = topic.score;
                fontSize = score * 40 + 8;
                let element = topic.createElement();
                element.innerText = content;
                element.style.fontSize=String(fontSize)+'px'
                //In case you have a Topics document you can add this element with differnt font size of topic based on the score
                document.getElementById('Topics').appendChild(element);

            }
        };
        // Subscribe to realtime tracker events using the handler created above
        this.symbl.subscribeToTopicEvents(topicHandler);

Realtime Trackers

Realtime trackers are generated as Symbl processes the conversation in your video chat platform.

When an Tracker is detected by Symbl and the onTrackerCreated event is emitted, an Tracker object is passed to the callback function provided in the Tracker handler.

The Tracker class holds data about the tracker generated.

Tracker Class Attributes

Field Type Description
name string Tracker name
matches array Tracker text matches

Handler

The Symbl adapter exposes a handler function, subscribeToTrackerEvents, that has a callback function onTrackerCreated.

Trackers are enabled by adding a list of name and vocabulary pharses in the form of disctionaries to be found in a conversation.

new Symbl(chimeConfiguration, {trackers:[
        {
            name: "COVID-19",
            vocabulary: [
                "social distancing",
                "cover your face with mask",
                "vaccination"
            ]
        }
    ],});

Subscribing to the Tracker publisher is achieved by passing a handler to the subscribeToTrackerEvents function of your Symbl instance.

Example

When an tracker event is emitted from the onTrackerCreated handler, you can use the Tracker object returned and either use the createElement function to create a default element or you can use the data included in the Tracker object returned in the handlers callback to create your own element, capture the data and store as a metric, etc…

        const TrackerHandler = {
            onTrackerCreated: (topic: Tracker) => {
                const name = tracker.name;
                const matches = tracker.matches;
                let currentCategoryHit=0;
                //Check the number of non-empty messageRefs in current tracker
                for (let i = 0; i < matches.length; i++) {
                    if (matches[i]["messageRefs"].length > 0) {
                        currentCategoryHit+=1
                    }
                }
                let element = tracker.createElement();
                element.innerText = name + ':' + String(currentCategoryHit);
                element.style.fontSize = String(12 + currentCategoryHit)+ 'px';
                 //In case you have a Trackers document you can add this element with differnt
                 //font size of tracker based on the number of messageRefs to know how many times the tracker was foud in the converation  
                document.getElementById('Trackers').appendChild(element);

            }
        };
        // Subscribe to realtime tracker events using the handler created above
        this.symbl.subscribeToTrackerEvents(trackerHandler);

Realtime Transcripts

Realtime transcripts differ slightly from realtime closed-captioning. A Transcript object is created when after speech is no longer detected.

Attributes

Field Type Description
message string Speech content
userName string Speaker Name
userId string Speaker Id
timestamp Date Time of the transcript event

Handler

The Transcript handler has only one event, onTranscriptCreated. Each time a speaker finishes speaking a Transcript object is generated.

Subscribing to the transcript publisher is achieved by passing a handler to the subscribeToTranscriptEvents function of your Symblinstance.

Example

const transcriptHandler = {
    onTranscriptCreated: (transcript: Transcript) => {
      // Handle transcript item
    }
};
this.symbl.subscribeToTranscriptEvents(transcriptHandler);

Generating Meeting Summary URL

To generate a meeting summary URL, you need only to call the getSummaryUrlfunction of your Symbl instance.

const meetingSummaryUrl = await symbl.getSummaryUrl();

Conclusion

Your application now enables Symbl.ai to run on top of Amazon Chime's adapter.

Community

If you are having trouble, check out our API overview or test your endpoints in Postman.If you have any questions, feel free to reach out to us at devrelations@symbl.ai or through our Community Slack or our developer community.

This guide is actively developed, and we love to hear from you! Please feel free to create an issue or open a pull request with your questions, comments, suggestions and feedback. If you liked our integration guide, please star our repo!

This library is released under the MIT License

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