Wordsmithing of privacy considerations

index.html

@@ -907,14 +907,15 @@ <h2>Privacy Considerations</h2>
     <section>
       <h2>Persistent information</h2>
       <p>
-        In this specification, encoder use of scalable coding tools is not negotiated
-        between peers, so that it is not exposed during SDP negotiation. Since support
-        for scalable video coding is rare in hardware encoders, knowledge of the
+        In WebRTC, the use of scalable coding tools is not negotiated between
+        peers, and therefore support for SVC is not negotiated in SDP.  Currently,
+        hardware encoders rarely support {{RTCRtpEncodingParameters/scalabilityMode}}
+        values beyond two and three layer temporal scalability, so that support for
+        other {{RTCRtpEncodingParameters/scalabilityMode}} values needs to be provided
+        in software. As a result, knowledge of the 
         {{RTCRtpEncodingParameters/scalabilityMode}} values supported by the
-        {{RTCRtpSender}} is typically not dependent on the underlying hardware, but
-        is determined by support in the browser's software encoder. As a result,
-        knowledge of the supported {{RTCRtpEncodingParameters/scalabilityMode}} values 
-        can permit differentiation between browsers. This additional fingerprint
+        {{RTCRtpSender}} provides little information about the underlying hardware,
+        but can permit differentiation between browsers. This additional fingerprint
         surface is expected to decrease as this specification is more widely implemented.
       </p>
     </section>