Encoder overview document minor fix
Small text change and formula tidy up.
Change-Id: I5f766a17aa84542fb180d9e84db0ec337bcc6d2d
diff --git a/doc/dev_guide/av1_encoder.dox b/doc/dev_guide/av1_encoder.dox
index b1ae682..5b05c02 100644
--- a/doc/dev_guide/av1_encoder.dox
+++ b/doc/dev_guide/av1_encoder.dox
@@ -56,8 +56,8 @@
AV1 also supports warped motion prediction using affine transforms.
In terms of transform coding, it has 16 separable 2-D transform kernels
-{ DCT, ADST, fADST, IDTX }2 that can be applied at up to 19 different scales
-from 64x64 down to 4x4 pixels.
+\f$(DCT, ADST, fADST, IDTX)^2\f$ that can be applied at up to 19 different
+scales from 64x64 down to 4x4 pixels.
When combined together, this means that for any one 8x8 pixel block in a
source frame, there are approximately 45,000,000 different ways that it can
@@ -1126,10 +1126,10 @@
\section architecture_enc_tx_search Transform Search
-AV1 implements the transform stage using 4 seperable 1-d transforms which
-can be combined to give 16 2-d combinations. These are DCT, ADST, FLIPADST
-and IDTX, where FLIPADST is the reversed version of ADST and IDTX is the
-identity transform.
+AV1 implements the transform stage using 4 seperable 1-d transforms (DCT,
+ADST, FLIPADST and IDTX, where FLIPADST is the reversed version of ADST
+and IDTX is the identity transform) which can be combined to give 16 2-d
+combinations.
These combinations can be applied at 19 different scales from 64x64 pixels
down to 4x4 pixels.
