Accession Number:

ADA256443

Title:

Co-Channel Speaker Separation

Descriptive Note:

Master's thesis,

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

Report Date:

1992-09-01

Pagination or Media Count:

101.0

Abstract:

In the co-channel speaker separation problem, the goal is to recover two separate speech signals from a monaural channel which contains the sum of the two speech signals. A new methodology is developed that if given that a segment of co-channel speech is separated into a stronger and weaker segment, the correct assignment of these separated segments to the appropriate talker can be made using a Linear Predictive Coding LPC based minimum-prediction residual computation. The uniqueness of the developed technique is that no a priori information is required of the co-channel speech signal. The information needed to appropriately assign these separated segments from the co-channel speech signal are clean speech that is separate from the co-channel speech signal that are used to compute model LPC vectors. This clean speech is derived from the same channel that the co-channel speech signal is derived from. This technique has shown the ability to correctly assign the given stronger and weaker segments to the appropriate talker at signal-to-signal ratios down to equal power levels. The resulting separated speech is clearly understandable, and the interfering talkers speech signal is effectively eliminated. Co-Channel, Speaker Separation, Speech Processing, LPC, Itakura Minimum Prediction Residual.

Subject Categories:

  • Radiofrequency Wave Propagation
  • Voice Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE