Address review comment

Author: Guido Urdaneta

index.bs

@@ -52,7 +52,7 @@ spec:webidl; type:dfn; text:resolve
    "RTP-EXT-CAPTURE-TIME": {
     "href": "https://datatracker.ietf.org/doc/draft-ietf-avtcore-abs-capture-time/",
     "title": "RTP Header Extension for Absolute Capture Time",
-    "publisher": "WebRTC Project"
+    "publisher": "IETF"
    }
 }
 </pre>
@@ -461,12 +461,8 @@ dictionary RTCEncodedVideoFrameMetadata {
     </dt>
     <dd>
         <p>
-            The {{RTCEncodedVideoFrameMetadata/captureTime}} is set by the frame source, and for frames that come
-            from the {{RTCRtpReceiver}}, it is extracted by the [[#stream-processing]] algorithm. Its reference clock
-            is the capture system's NTP clock (same clock used to generate NTP timestamps for RTCP sender reports on
-            that system).
-
-            On populating this member, the user agent MUST return the value of the frame's `[[captureTime]]` slot.
+            On populating this member, the user agent MUST return the value of the frame's `[[captureTime]]` slot,
+            shifted to be relative to {{Performance}}.{{Performance/timeOrigin}}.
         </p>
     </dd>
     <dt>
@@ -725,12 +721,8 @@ dictionary RTCEncodedAudioFrameMetadata {
     </dt>
     <dd>
         <p>
-            The {{RTCEncodedAudioFrameMetadata/captureTime}} is set by the frame source, and for frames that come
-            from the {{RTCRtpReceiver}}, it is extracted by the [[#stream-processing]] algorithm. Its reference clock
-            is the capture system's NTP clock (same clock used to generate NTP timestamps for RTCP sender reports on
-            that system).
-
-            On populating this member, the user agent MUST return the value of the frame's `[[captureTime]]` slot.
+            On populating this member, the user agent MUST return the value of the frame's `[[captureTime]]` slot,
+            shifted to be relative to {{Performance}}.{{Performance/timeOrigin}}.
         </p>
     </dd>
     <dt>