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In article <1992Aug19.152249.1929@news.acns.nwu.edu> tilden@casbah.acns.nwu.edu (Robert Tilden) writes:
>Hi,
>        I'm looking for references, suggestions and the like for extracting
>speech from background noise. As a side issue, I'm also interested in
>methods for detecting the presence of speech in an audio signal. I intend
>to perform some level of audio processing of shortwave signals.
>
>Thanks,
>        Bob     tilden@nuhepl.phys.nwu.edu

Hello Bob,

I have been working at improving on a system to track a signal that
contains noise.  The work that we have started with is:

Selfperturbing Recursive Least Squares Algorithm with Fast Tracking
Capability, by D.J. Park and B.E. Jun, in ELECTRONICS LETTERS,
12th March 1992, Vol. 28 No. 6.

The idea is to estimate the input signal using a 10 term filter.
The system does not seem to react well to larger noise levels and
we are working on improving it in this area.

I don't think that this would help to seperate voice and music, but
we hope it will remove background and machine noise of any gain 
from the voice/music signals.

The above reference is a good starting point.  I do not know what
we are going to do with our findings yet but the summer job ends
Sept. 1st.

Good luck,

	Richard

-- 
Adult Children of Alcoholics:  God, grant me the serenity to accept
 the things we cannot change, the courage to change the things we
             can, and the wisdom to know the difference.
     * Help break the chain; become aware and educate others! *

I have been doing some work in the area of detecting speech vs. background
noise, but not in separating them.  I have a draft of a review paper on the
topic, but it is not yet available for general release.  Enclosed is my
current (long) bibliography.

Barry.

Barry Arons                    Phone: +1 617-253-2245 (vmail after ~4 rings)
Speech Research Group
MIT Media Lab                  Fax:   +1 617-258-6264 (confirm at above number)
20 Ames Street, E15-353        E-Mail: barons@media-lab.mit.edu
Cambridge MA, 02139            Home:  +1 617-TOUCHED  (868-2433)

================================================================

B. S. Atal and L. R. Rabiner.
A pattern recognition approach to voiced-unvoiced- silence
  classification with applications to speech recognition.
 IEEE Transactions on Acoustics, Speech, and Signal Processing,
  ASSP-24(3):201--212, June 1976.

B. Arons.
Techniques, perception, and applications of time-compressed speech,
  1992.
To appear in Proceedings of the American Voice I/O Society
  Conference.

P. T. Brady.
A technique for investigating on-off patterns of speech.
 The Bell System Technical Journal, 44(1):1--22, January 1965.

P. T. Brady.
A statistical analysis of on-off patterns in 16 conversations.
 The Bell System Technical Journal, 47(1):73--91, January 1968.

P. T. Brady.
A model for generating on-off speech patterns in two-way
  conversation.
 The Bell System Technical Journal, 48:2445--2472, September
  1969.

S. J. Campanella.
Digital speech interpolation.
 COMSAT Technical Review, 6(1):127--158, Spring 1976.

P. De Souza.
A statistical approach to the design of an adaptive self-normalizing
  silence detector.
 IEEE Transactions on Acoustics, Speech, and Signal Processing,
  ASSP-31(3):678--684, June 1983.

P. G. Drago, A. M. Molinari, and F. C. Vagliani.
Digital dynamic speech detectors.
 IEEE Transactions on Communications, COM-26(1):140--145,
  January 1978.

C. K. Gan and R. W. Donaldson.
Adaptive silence deletion for speech storage and voice mail
  applications.
 IEEE Transactions on Acoustics, Speech, and Signal Processing,
  36(6):924--927, June 1988.
J. G. Gruber and N. H. Le.
Performance requirements for integrated voice/data networks.
 IEEE Journal on Selected Areas in Communications,
  SAC-1(6):981--1005, December 1983.

J. G. Gruber.
A comparison of measured and calculated speech temporal parameters
  relevant to speech activity detection.
 IEEE Transactions on Communications, COM-30(4):728--738, April
  1982.

W. J. Hess.
A pitch-synchronous digital feature extraction system for phonemic
  recognition of speech.
 IEEE Transactions on Acoustics, Speech, and Signal Processing,
  ASSP-24(1):14--25, February 1976.

J. A. Jankowski.
A new digital voice-activated switch.
 COMSAT Technical Review, 6(1):159--178, Spring 1976.

H. Kobatake, K. Tawa, and A. Ishida.
Speech/nonspeech discrimination for speech recognition system, under
  real life noise environments.
In  Proceedings of the International Conference on Acoustics,
  Speech, and Signal Processing, pages 365--368. IEEE, 1989.

J. F. Lynch Jr., J. G. Josenhans, and R. E. Crochiere.
Speech/silence segmentation for real-time coding via rule based
  adaptive endpoint detection.
In  Proceedings of the International Conference on Acoustics,
  Speech, and Signal Processing, pages 1348--1351. IEEE, 1987.

L. F. Lamel, L. R. Rabiner, A. E. Rosenberg, and J. G. Wilpon.
An improved endpoint detector for isolated word recognition.
 IEEE Transactions on Acoustics, Speech, and Signal Processing,
  ASSP-29(4):777--785, August 1981.

H. H. Lee and C. K. Un.
A study of on-off characteristics of conversational speech.
 IEEE Transactions on Communications, COM-34(6):630--637, June
  1986.

H. Miedema and M. G. Schachtman.
TASI quality---effect of speech detectors and interpolators.
 The Bell System Technical Journal, pages 1455--1473, 1962.

Natural MicroSystems Corporation.
 ME/2 Device Driver Reference Manual, 1988.

D. O'Shaughnessy.
 Speech Communication: Human and Machine.
Addison-Wesley, 1987.

L. R. Rabiner and M. R. Sambur.
An algorithm for determining the endpoints of isolated utterances.
 The Bell System Technical Journal, 54(2):297--315, February
  1975.

L.R. Rabiner and R.W. Schafer.
 Digital Processing of Speech Signals.
Signal Processing Series. Prentice-Hall, Englewood Cliffs, New
  Jersey, 1978.

C. Schmandt and B. Arons.
A conversational telephone messaging system.
 IEEE Transactions on Consumer Electronics, CE-30(3):xxi--xxiv,
  August 1984.

M. H. Savoji.
A robust algorithm for accurate endpointing of speech signals.
 Speech Communication, 8:45--60, 1989.

T. Watanabe.
The adaptation of machine conversational speed to speaker utterance
  speed in human-machine communication.
 IEEE Transactions on Systems, Man, and Cybernetics,
  20(1):502--507, 1990.

J. G. Wilpon, L. R. Rabiner, and T. Martin.
An improved word-detection algorithm for telephone-quality speech
  incorporating both syntactic and semantic constraints.
 AT\&T Bell Laboratories Technical Journal, 63(3):479--497,
  March 1984.

Y. Yatsuzuka.
Highly sensitive speech detector and high-speed voiceband data
  discriminator in DSI-ADPCM systems.
 IEEE Transactions on Communications, COM-30(4):739--750, April
  1982.