diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 0d75f381ee0..6ea823fb702 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -103,6 +103,9 @@
     *   Deprecate `setControlDispatcher` in `PlayerView`, `StyledPlayerView`,
         `PlayerControlView`, `StyledPlayerControlView` and
         `PlayerNotificationManager`.
+*   Extractors:
+    *   Add support for DTS-UHD in MP4
+        ([#9163](https://github.com/google/ExoPlayer/issues/9163).
 *   Ad playback:
     *   Support changing ad break positions in the player logic
         ([#5067](https://github.com/google/ExoPlayer/issues/5067).
diff --git a/library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java b/library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java
index 066cdc9ea44..aa3d313a0b3 100644
--- a/library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java
+++ b/library/common/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java
@@ -76,6 +76,7 @@ public final class MimeTypes {
   public static final String AUDIO_DTS = BASE_TYPE_AUDIO + "/vnd.dts";
   public static final String AUDIO_DTS_HD = BASE_TYPE_AUDIO + "/vnd.dts.hd";
   public static final String AUDIO_DTS_EXPRESS = BASE_TYPE_AUDIO + "/vnd.dts.hd;profile=lbr";
+  public static final String AUDIO_DTS_UHD = BASE_TYPE_AUDIO + "/vnd.dts.uhd";
   public static final String AUDIO_VORBIS = BASE_TYPE_AUDIO + "/vorbis";
   public static final String AUDIO_OPUS = BASE_TYPE_AUDIO + "/opus";
   public static final String AUDIO_AMR = BASE_TYPE_AUDIO + "/amr";
@@ -380,10 +381,14 @@ public static String getMediaMimeType(@Nullable String codec) {
       return MimeTypes.AUDIO_E_AC3_JOC;
     } else if (codec.startsWith("ac-4") || codec.startsWith("dac4")) {
       return MimeTypes.AUDIO_AC4;
-    } else if (codec.startsWith("dtsc") || codec.startsWith("dtse")) {
+    } else if (codec.startsWith("dtsc")) {
       return MimeTypes.AUDIO_DTS;
+    } else if (codec.startsWith("dtse")) {
+      return MimeTypes.AUDIO_DTS_EXPRESS;
     } else if (codec.startsWith("dtsh") || codec.startsWith("dtsl")) {
       return MimeTypes.AUDIO_DTS_HD;
+    } else if (codec.startsWith("dtsx")) {
+      return MimeTypes.AUDIO_DTS_UHD;
     } else if (codec.startsWith("opus")) {
       return MimeTypes.AUDIO_OPUS;
     } else if (codec.startsWith("vorbis")) {
diff --git a/library/common/src/test/java/com/google/android/exoplayer2/util/MimeTypesTest.java b/library/common/src/test/java/com/google/android/exoplayer2/util/MimeTypesTest.java
index 2baac87e858..490a68d0ab4 100644
--- a/library/common/src/test/java/com/google/android/exoplayer2/util/MimeTypesTest.java
+++ b/library/common/src/test/java/com/google/android/exoplayer2/util/MimeTypesTest.java
@@ -137,9 +137,10 @@ public void getMediaMimeType_fromValidCodecs_returnsCorrectMimeType() {
     assertThat(MimeTypes.getMediaMimeType("ec-3")).isEqualTo(MimeTypes.AUDIO_E_AC3);
     assertThat(MimeTypes.getMediaMimeType("ec+3")).isEqualTo(MimeTypes.AUDIO_E_AC3_JOC);
     assertThat(MimeTypes.getMediaMimeType("dtsc")).isEqualTo(MimeTypes.AUDIO_DTS);
-    assertThat(MimeTypes.getMediaMimeType("dtse")).isEqualTo(MimeTypes.AUDIO_DTS);
+    assertThat(MimeTypes.getMediaMimeType("dtse")).isEqualTo(MimeTypes.AUDIO_DTS_EXPRESS);
     assertThat(MimeTypes.getMediaMimeType("dtsh")).isEqualTo(MimeTypes.AUDIO_DTS_HD);
     assertThat(MimeTypes.getMediaMimeType("dtsl")).isEqualTo(MimeTypes.AUDIO_DTS_HD);
+    assertThat(MimeTypes.getMediaMimeType("dtsx")).isEqualTo(MimeTypes.AUDIO_DTS_UHD);
     assertThat(MimeTypes.getMediaMimeType("opus")).isEqualTo(MimeTypes.AUDIO_OPUS);
     assertThat(MimeTypes.getMediaMimeType("vorbis")).isEqualTo(MimeTypes.AUDIO_VORBIS);
     assertThat(MimeTypes.getMediaMimeType("mp4a")).isEqualTo(MimeTypes.AUDIO_AAC);
diff --git a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
index 83aeadd01da..a85d928f04d 100644
--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/Atom.java
@@ -164,6 +164,9 @@
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_dtse = 0x64747365;
 
+  @SuppressWarnings("ConstantCaseForConstants")
+  public static final int TYPE_dtsx = 0x64747378;
+
   @SuppressWarnings("ConstantCaseForConstants")
   public static final int TYPE_ddts = 0x64647473;
 
diff --git a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
index 957bc4b4abc..f6ed6f7796f 100644
--- a/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
+++ b/library/extractor/src/main/java/com/google/android/exoplayer2/extractor/mp4/AtomParsers.java
@@ -965,6 +965,7 @@ private static StsdData parseStsd(
           || childAtomType == Atom.TYPE_dtse
           || childAtomType == Atom.TYPE_dtsh
           || childAtomType == Atom.TYPE_dtsl
+          || childAtomType == Atom.TYPE_dtsx
           || childAtomType == Atom.TYPE_samr
           || childAtomType == Atom.TYPE_sawb
           || childAtomType == Atom.TYPE_lpcm
@@ -1371,6 +1372,8 @@ private static void parseAudioSampleEntry(
       mimeType = MimeTypes.AUDIO_DTS_HD;
     } else if (atomType == Atom.TYPE_dtse) {
       mimeType = MimeTypes.AUDIO_DTS_EXPRESS;
+    } else if (atomType == Atom.TYPE_dtsx) {
+      mimeType = MimeTypes.AUDIO_DTS_UHD;
     } else if (atomType == Atom.TYPE_samr) {
       mimeType = MimeTypes.AUDIO_AMR_NB;
     } else if (atomType == Atom.TYPE_sawb) {