Fix spelling errors.

Change-Id: I9da04df88c4127203f5e9d4980b12ec7543afdf0
diff --git a/av1/common/blockd.h b/av1/common/blockd.h
index a2311c1..b24bcec 100644
--- a/av1/common/blockd.h
+++ b/av1/common/blockd.h
@@ -406,7 +406,7 @@
   ENTROPY_CONTEXT *above_context;
   ENTROPY_CONTEXT *left_context;
 
-  // The dequantizers below are true dequntizers used only in the
+  // The dequantizers below are true dequantizers used only in the
   // dequantization process.  They have the same coefficient
   // shift/scale as TX.
   int16_t seg_dequant_QTX[MAX_SEGMENTS][2];
diff --git a/av1/common/onyxc_int.h b/av1/common/onyxc_int.h
index 15b3463..5798a3f 100644
--- a/av1/common/onyxc_int.h
+++ b/av1/common/onyxc_int.h
@@ -340,7 +340,7 @@
   int u_ac_delta_q;
   int v_ac_delta_q;
 
-  // The dequantizers below are true dequntizers used only in the
+  // The dequantizers below are true dequantizers used only in the
   // dequantization process.  They have the same coefficient
   // shift/scale as TX.
   int16_t y_dequant_QTX[MAX_SEGMENTS][2];
diff --git a/av1/encoder/av1_quantize.h b/av1/encoder/av1_quantize.h
index 35af9a6..fb53881 100644
--- a/av1/encoder/av1_quantize.h
+++ b/av1/encoder/av1_quantize.h
@@ -67,7 +67,7 @@
 
 // The Dequants structure is used only for internal quantizer setup in
 // av1_quantize.c.
-// Fields are sufffixed according to whether or not they're expressed in
+// Fields are suffixed according to whether or not they're expressed in
 // the same coefficient shift/precision as TX or a fixed Q3 format.
 typedef struct {
   DECLARE_ALIGNED(16, int16_t,