Using the Windows command-line encoder that is part of opus-tools-0.1.9, we
encoded several talking book audio files for subjective listening tests. When
this program is encoding speech audio at 24 or 32 kbps constant bit rate from
files that have a 44.1 KHz sampling rate, which bandwidth (SWB or FB) would the
encoder default to?
This codec is quite impressive. The only signal that gives it some trouble is
where a 50-Hz index tone is superimposed on the audio (which adds some
background noise to the bit stream at these bit rates).
Lloyd Rasmussen, Senior Staff Engineer
National Library Service for the Blind and Physically Handicapped, Library of
Congress
Washington, DC 20542 202-707-0535
http://www.loc.gov/nls/
The preceding opinions are my own and do not necessarily reflect those of the
Library of Congress, NLS.
