Enhancement of computer program SPECTRAN to provide optional synthesis of 1/12 octave-band and critical-band spectra from 1/3 octave-band spectra

摘要

This paper describes greatly enhanced version of the computer program SPECTRAN, which was initially presented in Paper No. 96-RA104.01, at the A&WMA 89th Annual Meeting in June 1996. The program has had three basic upgrades since that time. The first is provision of an option to use either batch-mode input from previously prepared data files or a (open quotes)user-friendly(close quotes) interactive input routine. The latter is primarily for first-time users and those having only one, or very few, spectra to process. The second improvement is the synthesis of 1/12 octave-band spectra from 1/3 octave-band spectra, with (open quotes)tone correction,(close quotes) in a manner similar to that used in the original version of the program. The third fundamental improvement is addition of a unique new capability to synthesize classic (open quotes)critical-band(close quotes) spectra from 1/3 octave-band input spectra. Critical-band spectra are also termed (open quotes)equivalent- rectangular-bandwidth (ERB)(close quotes) and (open quotes)equal- contribution-to-speech (ECS)(close quotes) spectra.