diff --git a/webrtc-stats.html b/webrtc-stats.html
index 889f7e5..7d66739 100644
--- a/webrtc-stats.html
+++ b/webrtc-stats.html
@@ -1966,6 +1966,8 @@ <h3>
              unsigned long        framesEncoded;
              unsigned long        keyFramesEncoded;
              unsigned long long   qpSum;
+             record&lt;DOMString, double&gt; psnrSum;
+             unsigned long long   psnrMeasurements;
              double               totalEncodeTime;
              double               totalPacketSendDelay;
              RTCQualityLimitationReason                 qualityLimitationReason;
@@ -2218,6 +2220,46 @@ <h2>
                   formats have ways to vary the quantizer value within the frame.
                 </p>
               </dd>
+              <dt>
+                <dfn>psnrSum</dfn> of type <span class="idlMemberType">
+                record&lt;DOMString, double&gt;</span>
+              </dt>
+              <dd>
+                <p class="fingerprint">
+                  MUST NOT [= map/exist =] unless [= exposing hardware is allowed =].
+                </p>
+                <p>
+                  MUST NOT [= map/exist =] for audio.
+                  The cumulative sum of the PSNR values of frames encoded by this sender.
+                  The record includes values for the "y", "u" and "v" components.
+                  The count of measurements is in {{psnrMeasurements}}.
+                </p>
+                <p>
+                  PSNR is defined in [[ISO-29170-1:2017]].
+                </p>
+                <p class="note">
+		  PSNR metrics are intended for statistical analysis rather
+		  than representing absolute truth on a per-frame basis.
+                </p>
+              </dd>
+              <dt>
+                <dfn>psnrMeasurements</dfn> of type <span class="idlMemberType">unsigned long long
+                </span>
+              </dt>
+              <dd>
+                <p class="fingerprint">
+                  MUST NOT [= map/exist =] unless [= exposing hardware is allowed =].
+                </p>
+                <p>
+                  MUST NOT [= map/exist =] for audio.
+                  The number of times PSNR was measured. The components of {{psnrSum}} are
+                  aggregated with this measurement.
+                </p>
+                <p>
+                  The PSNR is defined in [[ISO-29170-1:2017]].
+                  The frequency of PSNR measurements is [=implementation-defined=].
+                </p>
+              </dd>
               <dt>
                 <dfn>totalEncodeTime</dfn> of type <span class=
                 "idlMemberType">double</span>
diff --git a/webrtc-stats.js b/webrtc-stats.js
index 1197742..1c87249 100644
--- a/webrtc-stats.js
+++ b/webrtc-stats.js
@@ -99,6 +99,11 @@ var respecConfig = {
             status:   "Internet Draft",
             publisher:  "IETF"
         },
+	"ISO-29170-1:2017": {
+	  title: "Information technology — Advanced image coding and evaluation",
+	  href: "https://www.iso.org/standard/63637.html",
+	  publisher: "ISO",
+	},
       },
   postProcess: [
     function generateStatsHierarchy(config, doc) {