diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 0645114772..75775a3693 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1584,12 +1584,15 @@ typedef struct AVCodecContext {
 #define FF_PROFILE_DNXHR_HQX     4
 #define FF_PROFILE_DNXHR_444     5
 
-#define FF_PROFILE_DTS         20
-#define FF_PROFILE_DTS_ES      30
-#define FF_PROFILE_DTS_96_24   40
-#define FF_PROFILE_DTS_HD_HRA  50
-#define FF_PROFILE_DTS_HD_MA   60
-#define FF_PROFILE_DTS_EXPRESS 70
+#define FF_PROFILE_DTS                20
+#define FF_PROFILE_DTS_ES             30
+#define FF_PROFILE_DTS_96_24          40
+#define FF_PROFILE_DTS_HD_HRA         50
+#define FF_PROFILE_DTS_HD_MA          60
+#define FF_PROFILE_DTS_EXPRESS        70
+#define FF_PROFILE_DTS_HD_MA_X        61
+#define FF_PROFILE_DTS_HD_MA_X_IMAX   62
+
 
 #define FF_PROFILE_EAC3_DDP_ATMOS         30
 
diff --git a/libavcodec/dca_syncwords.h b/libavcodec/dca_syncwords.h
index 4d2cd5f56d..649bbd90dc 100644
--- a/libavcodec/dca_syncwords.h
+++ b/libavcodec/dca_syncwords.h
@@ -33,4 +33,7 @@
 #define    DCA_SYNCWORD_SUBSTREAM_CORE       0x02B09261U
 #define    DCA_SYNCWORD_REV1AUX              0x9A1105A0U
 
+#define    DCA_SYNCWORD_XLL_X                0x02000850U
+#define    DCA_SYNCWORD_XLL_X_IMAX           0xF14000D0U
+
 #endif /* AVCODEC_DCA_SYNCWORDS_H */
diff --git a/libavcodec/dca_xll.c b/libavcodec/dca_xll.c
index fe2c766d98..b8cf37a35f 100644
--- a/libavcodec/dca_xll.c
+++ b/libavcodec/dca_xll.c
@@ -18,6 +18,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "avcodec.h"
 #include "libavutil/channel_layout.h"
 #include "dcadec.h"
 #include "dcadata.h"
@@ -1054,6 +1055,22 @@ static int parse_frame(DCAXllDecoder *s, const uint8_t *data, int size, DCAExssA
         return ret;
     if ((ret = parse_band_data(s)) < 0)
         return ret;
+
+     if (s->frame_size * 8 > FFALIGN(get_bits_count(&s->gb), 32)) {
+        unsigned int extradata_syncword;
+
+        // Align to dword
+        skip_bits_long(&s->gb, -get_bits_count(&s->gb) & 31);
+
+        extradata_syncword = show_bits_long(&s->gb, 32);
+
+        if (extradata_syncword == DCA_SYNCWORD_XLL_X) {
+            s->x_syncword_present = 1;
+        } else if ((extradata_syncword >> 1) == (DCA_SYNCWORD_XLL_X_IMAX >> 1)) {
+            s->x_imax_syncword_present = 1;
+        }
+    }
+
     if (ff_dca_seek_bits(&s->gb, s->frame_size * 8)) {
         av_log(s->avctx, AV_LOG_ERROR, "Read past end of XLL frame\n");
         return AVERROR_INVALIDDATA;
@@ -1428,8 +1445,15 @@ int ff_dca_xll_filter_frame(DCAXllDecoder *s, AVFrame *frame)
         return AVERROR(EINVAL);
     }
 
+    if (s->x_imax_syncword_present) {
+        avctx->profile = FF_PROFILE_DTS_HD_MA_X_IMAX;
+    } else if (s->x_syncword_present) {
+        avctx->profile = FF_PROFILE_DTS_HD_MA_X;
+    } else {
+        avctx->profile = FF_PROFILE_DTS_HD_MA;
+    }
+
     avctx->bits_per_raw_sample = p->storage_bit_res;
-    avctx->profile = FF_PROFILE_DTS_HD_MA;
     avctx->bit_rate = 0;
 
     frame->nb_samples = nsamples = s->nframesamples << (s->nfreqbands - 1);
diff --git a/libavcodec/dca_xll.h b/libavcodec/dca_xll.h
index d7c1a13ec8..a22bbb8d77 100644
--- a/libavcodec/dca_xll.h
+++ b/libavcodec/dca_xll.h
@@ -135,6 +135,9 @@ typedef struct DCAXllDecoder {
 
     DCADSPContext   *dcadsp;
 
+    int    x_syncword_present;        ///< Syncword for extension data at end of frame (DTS:X) is present
+    int    x_imax_syncword_present;   ///< Syncword for extension data at end of frame (DTS:X IMAX) is present
+
     int     output_mask;
     int32_t *output_samples[DCA_SPEAKER_COUNT];
 } DCAXllDecoder;
diff --git a/libavcodec/profiles.c b/libavcodec/profiles.c
index ec5d646344..545626337c 100644
--- a/libavcodec/profiles.c
+++ b/libavcodec/profiles.c
@@ -36,12 +36,14 @@ const AVProfile ff_aac_profiles[] = {
 };
 
 const AVProfile ff_dca_profiles[] = {
-    { FF_PROFILE_DTS,         "DTS"         },
-    { FF_PROFILE_DTS_ES,      "DTS-ES"      },
-    { FF_PROFILE_DTS_96_24,   "DTS 96/24"   },
-    { FF_PROFILE_DTS_HD_HRA,  "DTS-HD HRA"  },
-    { FF_PROFILE_DTS_HD_MA,   "DTS-HD MA"   },
-    { FF_PROFILE_DTS_EXPRESS, "DTS Express" },
+    { FF_PROFILE_DTS,                "DTS"                    },
+    { FF_PROFILE_DTS_ES,             "DTS-ES"                 },
+    { FF_PROFILE_DTS_96_24,          "DTS 96/24"              },
+    { FF_PROFILE_DTS_HD_HRA,         "DTS-HD HRA"             },
+    { FF_PROFILE_DTS_HD_MA,          "DTS-HD MA"              },
+    { FF_PROFILE_DTS_HD_MA_X,        "DTS-HD MA + DTS:X"      },
+    { FF_PROFILE_DTS_HD_MA_X_IMAX,   "DTS-HD MA + DTS:X IMAX" },
+    { FF_PROFILE_DTS_EXPRESS,        "DTS Express"            },
     { FF_PROFILE_UNKNOWN },
 };