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) : Andrews, Thomas S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256443.pdf


Report Date : Sep 1992


Pagination or Media Count : 101


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 talker's speech signal is effectively eliminated. Co-Channel, Speaker Separation, Speech Processing, LPC, Itakura Minimum Prediction Residual.


Descriptors :   *SPEECH TRANSMISSION , POWER LEVELS , METHODOLOGY , RATIOS , COMPUTATIONS , PREDICTIONS , MODELS , PROCESSING , POWER , PITCH DISCRIMINATION , VOICE COMMUNICATIONS , CHANNELS , ACOUSTIC FILTERS , SPEECH , THESES , CODING , SPECTRA , RESIDUALS , SIGNALS , ALLOCATIONS , SEPARATION


Subject Categories : Radiofrequency Wave Propagation
      Voice Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE