doc: fix some minor typos in the documentation

doc/Doxyfile.in

@@ -101,7 +101,7 @@ EXTRACT_PRIVATE        = NO
 # names in lower-case letters. If set to YES, upper-case letters are also
 # allowed. This is useful if you have classes or files whose names only differ
 # in case and if your file system supports case sensitive file names. Windows
-# (including Cygwin) ands Mac users are advised to set this option to NO.
+# (including Cygwin) and Mac users are advised to set this option to NO.
 # The default value is: system dependent.
 
 CASE_SENSE_NAMES       = YES

doc/draft-ietf-codec-opus.xml

@@ -397,7 +397,7 @@ implementation can add or modify these control parameters without affecting inte
 important encoder control parameters in the reference encoder are listed below.
 </t>
 
-<section title="Bitrate" toc="exlcude">
+<section title="Bitrate" toc="exclude">
 <t>
 Opus supports all bitrates from 6&nbsp;kb/s to 510&nbsp;kb/s. All other parameters being
 equal, higher bitrate results in higher quality. For a frame size of 20&nbsp;ms, these
@@ -412,7 +412,7 @@ are the bitrate "sweet spots" for Opus in various configurations:
 </t>
 </section>
 
-<section title="Number of Channels (Mono/Stereo)" toc="exlcude">
+<section title="Number of Channels (Mono/Stereo)" toc="exclude">
 <t>
 Opus can transmit either mono or stereo frames within a single stream.
 When decoding a mono frame in a stereo decoder, the left and right channels are
@@ -426,7 +426,7 @@ The number of channels encoded can be selected in real-time, but by default the
 </t>
 </section>
 
-<section title="Audio Bandwidth" toc="exlcude">
+<section title="Audio Bandwidth" toc="exclude">
 <t>
 The audio bandwidths supported by Opus are listed in
  <xref target="audio-bandwidth"/>.
@@ -445,7 +445,7 @@ The audio bandwidth can be explicitly specified in real-time, but by default
 </section>
 
 
-<section title="Frame Duration" toc="exlcude">
+<section title="Frame Duration" toc="exclude">
 <t>
 Opus can encode frames of 2.5, 5, 10, 20, 40 or 60&nbsp;ms.
 It can also combine multiple frames into packets of up to 120&nbsp;ms.
@@ -459,7 +459,7 @@ For this reason, 20&nbsp;ms frames are a good choice for most applications.
 </t>
 </section>
 
-<section title="Complexity" toc="exlcude">
+<section title="Complexity" toc="exclude">
 <t>
 There are various aspects of the Opus encoding process where trade-offs
 can be made between CPU complexity and quality/bitrate. In the reference
@@ -477,7 +477,7 @@ resolution and the pitch post-filter.</t>
 </t>
 </section>
 
-<section title="Packet Loss Resilience" toc="exlcude">
+<section title="Packet Loss Resilience" toc="exclude">
 <t>
 Audio codecs often exploit inter-frame correlations to reduce the
 bitrate at a cost in error propagation: after losing one packet
@@ -488,7 +488,7 @@ choose a trade-off between bitrate and amount of error propagation.
 </t>
 </section>
 
-<section title="Forward Error Correction (FEC)" toc="exlcude">
+<section title="Forward Error Correction (FEC)" toc="exclude">
 <t>
    Another mechanism providing robustness against packet loss is the in-band
    Forward Error Correction (FEC).  Packets that are determined to
@@ -498,7 +498,7 @@ choose a trade-off between bitrate and amount of error propagation.
 </t>
 </section>
 
-<section title="Constant/Variable Bitrate" toc="exlcude">
+<section title="Constant/Variable Bitrate" toc="exclude">
 <t>
 Opus is more efficient when operating with variable bitrate (VBR), which is
 the default. However, in some (rare) applications, constant bitrate (CBR)
@@ -517,7 +517,7 @@ CBR due to the bit reservoir).
 </t>
 </section>
 
-<section title="Discontinuous Transmission (DTX)" toc="exlcude">
+<section title="Discontinuous Transmission (DTX)" toc="exclude">
 <t>
    Discontinuous Transmission (DTX) reduces the bitrate during silence
    or background noise.  When DTX is enabled, only one frame is encoded

doc/opus_in_isobmff.html

@@ -137,7 +137,7 @@
         4.3.2 Opus Specific Box<a name="4.3.2"></a>
             Exactly one Opus Specific Box shall be present in each OpusSampleEntry.
             The Opus Specific Box contains an OpusDecoderConfigurationRecord which contains the Version field and
-            this specification defines version 0 of this record. If incompatible changes occured in the fields after
+            this specification defines version 0 of this record. If incompatible changes occurred in the fields after
             the Version field within the OpusDecoderConfigurationRecord in the future versions of this specification,
             another version will be defined.
             This box refers to Ogg Opus [3] at many parts but all the data are stored as big-endian format.
@@ -297,7 +297,7 @@
         4.5.2 Composition on all active tracks (informative)<a name="4.5.2"></a>
             By the application of alternate_group in the Track Header Box, whole audio channels in all active tracks from
             non-alternate group and/or different alternate group from each other are composited into the presentation. If
-            an Opus sample consists of multiple Opus bitstreams, it can be splitted into individual Opus bitstreams and
+            an Opus sample consists of multiple Opus bitstreams, it can be split into individual Opus bitstreams and
             reconstructed into new Opus samples as long as every Opus bitstream has the same total duration in each Opus
             sample. This nature can be utilized to encapsulate a single Opus bitstream in each track without breaking the
             original channel layout.
@@ -597,7 +597,7 @@
                                             CoupledCount = 2
                                             ChannelMapping
                                                 0 -> 0: front left
-                                                1 -> 4: fron center
+                                                1 -> 4: front center
                                                 2 -> 1: front right
                                                 3 -> 2: side left
                                                 4 -> 3: side right