Add Amazon Chime Echo Reduction support in Voice Focus.

[dimitarz]

Issue #:

Description of changes:
Adding Echo Reduction improvements to Voice Focus. Echo reduction helps keep echoes—sounds from a user’s loudspeaker that get picked up by their microphone—from circulating back into meeting audio and bringing discussions to a standstill. The echo reduction feature is available in conjunction with the noise reduction provided by Amazon Voice Focus.

Testing:

Can these tested using a demo application? Please provide reproducible step-by-step instructions.

Added an option to enable this via the Demo app. To enable it, start the demo app and click on 'Enable Echo Reduction (new meetings only)'. This will create a new meeting with the correct attributes such that clients which connect can enable Echo Reduction.

To enable the feature, one must create the meeting as follows:

// Create meeting 
const meetingInfo = await chime.createMeeting({
  ...
  MeetingFeatures: {
    Audio: {
      EchoReduction: 'AVAILABLE' 
    }
  } 
}).promise();

// Add attendee 
const attendeeInfo = await chime.createAttendee({...});
const joinInfo = { 
  JoinInfo: {
    Meeting: meetingInfo,
    Attendee: attendeeInfo,
  }
}

The client then has to explicitly turn on Echo Reduction as follows:

// Select the Echo Reduction model
const spec: VoiceFocusSpec = {
  name: 'ns_es',
  ...
};

// Create the Voice Focus device
const transformer = VoiceFocusDeviceTransformer.create(spec, { logger }, joinInfo);

this.audioVideo = this.meetingSession.audioVideo;
const vfDevice = await transformer.createTransformDevice(chosenAudioInput);

// Enable Echo Reduction on this client
await vfDevice.observeMeetingAudio(this.audioVideo);

Checklist:

1. Have you successfully run npm run build:release locally? Yes.

2. Do you add, modify, or delete public API definitions? If yes, has that been reviewed and approved? Yes.

3. Do you change the wire protocol, e.g. the request method? If yes, has that been reviewed and approved? No and no.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license. Yes

[ltrung]

ns_es is for both right VF and Echo Reduction?

[dimitarz]

yes

[ltrung]

can we update it to mention that. It seems we refer to VF and Echo Reduction everywhere but not here.

[ltrung]

Aren't these need to be meetingResp and AttendeeResp and not just joinInfo?

[dimitarz]

VoiceFocusDeviceTransformer can handle both a JoinInfo object or individual ones

[ltrung]

Where is this defined?

[ltrung]

I don't think you need to defined the endpoint.

[ltrung]

This should just be using global endpoint.