北脇 信彦　

1. Comparison of Two Speech and Audio Coders at 8 kb/s from the Viewpoints of Coding
   Scheme and Quality
   IEICE, Trans. Communications, vol. E81-B, no. 11, pp. 2007-2012, November 1998.
   
   

2. A New Artificial Speech Signal for Objective Quality Evaluation of Speech Coding Systems
   IEEE Trans. Communications、vol.42, no.2/3/4, pp.664-672, February/March/April 1994.
   
   

3. Pure Delay Effects on Speech Quality in Telecommunications
   IEEE Journal on Selected Areas in Communications, JSAC, vol.9, no.4,
   pp. 586-593, May 1991.