Small doc fixes.

Signed-off-by: Stefan Westerfeld <stefan@space.twc.de>

README.adoc

@@ -8,15 +8,16 @@ watermark in the output sound file. For human listeners, the files typically
 sound the same.
 
 However, the 128-bit message can be retrieved from the output sound file. Our
-tests show, that even if the file is converted to mp3 or ogg (with bitrates
-higher than 128 kbit/s), the watermark usually can be retrieved without
-problems. The process of retrieving the message does not need the original
-audio file (blind decoding).
+tests show, that even if the file is converted to mp3 or ogg (with bitrate 128
+kbit/s or higher), the watermark usually can be retrieved without problems. The
+process of retrieving the message does not need the original audio file (blind
+decoding).
 
 Internally, audiowmark is using the patchwork algorithm to hide the data in the
-spectrum of the audio file. Some pseoudo-randomly selected amplitudes of the
-frequency bands of a 1024-value FFTs are increased or decreased slightly, which
-can be detected later. The algorithm used here is inspired by
+spectrum of the audio file. The signal is split into 1024 sample frames. For
+each frame, some pseoudo-randomly selected amplitudes of the frequency bands of
+a 1024-value FFTs are increased or decreased slightly, which can be detected
+later. The algorithm used here is inspired by
 
   Martin Steinebach: Digitale Wasserzeichen für Audiodaten.
   Darmstadt University of Technology 2004, ISBN 3-8322-2507-2
@@ -56,8 +57,8 @@ and can be used for the add/get commands as follows:
 The watermark strength parameter affects how much the watermarking algorithm
 modifies the input signal. A stronger watermark is more audible, but also more
 robust against modifications. The default strength is 10. A watermark with that
-strength is recoverable after mp3/ogg encoding with 128kbit/s. In our informal
-listening tests, this setting also has a very good subjective quality.
+strength is recoverable after mp3/ogg encoding with 128kbit/s or higher. In our
+informal listening tests, this setting also has a very good subjective quality.
 
 A higher strength (for instance 15) would be helpful for instance if robustness
 against multiple conversions or conversions to low bit rates (i.e. 64kbit/s) is