Contact emails
o...@google.com, gui...@google.com

Explainer
https://github.com/guidou/mediacapture-main/blob/master/explainer-echo-cancellation-mode.md


Specification
https://www.w3.org/TR/mediacapture-streams/#dom-echocancellationmodeenum


Summary

Extends echoCancellation behavior of MediaTrackConstraints dictionary - former 
true/false - by values "all" and "remote-only". Allows the clients to modify 
echo cancellation behavior applied to audio tracks received from microphones, 
controlling how much of the user system playout (all, or only audio received 
from PeerConnections) is removed from the microphone signal.



Blink component
Blink>WebRTC>Audio


TAG review
https://github.com/w3ctag/design-reviews/issues/1107


TAG review status
Issues addressed


Risks




Interoperability and Compatibility

None


Gecko: No signal (https://github.com/mozilla/standards-positions/issues/1241) 
Spec change approved by Mozilla's representative in the WG: 
https://github.com/w3c/mediacapture-main/pull/1044#pullrequestreview-2861443312

WebKit: No signal (https://github.com/WebKit/standards-positions/issues/507) 
Spec change approved by Apple's representative in the WG: 
https://github.com/w3c/mediacapture-main/pull/1044#pullrequestreview-2861451798

Web developers: No signals

Other signals:


WebView application risks

Does this intent deprecate or change behavior of existing APIs, such that it 
has potentially high risk for Android WebView-based applications?

None




Debuggability

None



Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, 
ChromeOS, Android, and Android WebView)?
Yes


Is this feature fully tested by web-platform-tests?
No


Flag name on about://flags
None


Finch feature name
GetUserMediaEchoCancellationModes


Rollout plan
Will ship enabled for all users


Requires code in //chrome?
False


Launch bug
https://launch.corp.google.com/launch/4403929


Availability expectation
Feature is available only in Chromium browsers for the foreseeable future.


Adoption expectation
Feature is used by specific partner(s) to provide functionality within 12 
months of launch in Chrome.


Estimated milestones


Shipping on desktop 141

Shipping on Android 141

Shipping on WebView 141

Shipping on iOS 141




Anticipated spec changes

Open questions about a feature may be a source of future web compat or interop 
issues. Please list open issues (eg links to known github issues in the project 
for the feature specification) whose resolution may introduce web 
compat/interop risk (eg, changing to naming or structure of the API in a 
non-backward-compatible way).
None


Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5585747985563648?gate=4921109098790912


This intent message was generated by Chrome Platform Status.

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