function?[yWtJ]?=?convbss（xTQKNverboseiterprinteveryetads）;
%CONVBSS?demixes?convolutively?mixed?signals.
%
%?This?implements?an?algorithm?for?blind?source?separation?of
%?convolutive?mixtures?that?has?been?published?in?
%
%????Lucas?Parra?Clay?Spence?
%????“Convolutive?blind?source?separation?of?non-stationary?sources“?
%????IEEE?Trans.?on?Speech?and?Audio?Processing?pp.320-327?May?2000.
%
%?and?it?has?been?patented?（US?patent?US6167417）.
%
%?The?input?arguments:
%???x???????-?the?mixed?signals?（along?the?columns）
%???T???????-?the?length?of?the?FFT?（default==512）
%???Q???????-?the?length?of?the?filter?in?time?domain?（default==128）
%???K???????-?the?number?of?matrices?to?diagonalize?（default==5）
%???N???????-?the?number?of?intervals?used?to?estimate?each
%?????????????cross-power-matrix?（default==7）
%???verbose?-?if?>0?the?progress?is?printed?out?（default==1）
%???iter????-?the?maximum?number?of?iterations?（default==1000）
%???printevery?-?how?often?should?be?something?printed?（default==10）
%???eta?????-?the?learning?rate?（default==1.0）
%???ds??????-?the?number?of?sources?to?be?estimated
%?????????????（default==number_of_columns_of_x）
%
%Copyright?notice:
%
%??author:?Stefan?Harmeling
%??????????GMD?FIRST?Berlin
%??????????????Germany
%
%THIS?IS?UNPUBLISHED?PROPRIETARY?SOURCE?CODE?of?GMD?FIRST?Berlin.
%??The?purpose?of?this?software?is?the?dissemination?of
%??scientific?work?for?scientific?use.?The?commercial
%??distribution?or?use?of?this?source?code?is?prohibited?
%??as?is?any?modification?of?its?content.
%The?copyright?notice?does?not?evidence?any?actual?or?intended?
%publication?of?this?code.
%
%Term?and?Termination:
%
%This?License?shall?continue?for?as?long?as?you?use?the?Software.?
%However?it?will?terminate?if?you?fail?to?comply?with?any?of?its?
%terms?and?conditions.?You?agree?upon?termination?to?discontinue
%using?and?to?destroy?all?copies?of?the?Software.?
%The?Limitations?of?Warranties?and?Liability?set?out?below?shall?
%continue?in?force?even?after?any?termination.
%
%Limitation?of?Warranties?and?Liability:
%
%THIS?SOFTWARE?IS?PROVIDED?BY?THE?AUTHOR?“AS?IS“?AND?ANY?EXPRESS?OR
%IMPLIED?WARRANTIES?INCLUDING?BUT?NOT?LIMITED?TO?THE?IMPLIED
%WARRANTIES?OF?MERCHANTABILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE?ARE
%HEREBY?DISCLAIMED.??IN?NO?EVENT?SHALL?THE?AUTHOR?BE?LIABLE?FOR
%ANY?DIRECT?INDIRECT?INCIDENTAL?SPECIAL?EXEMPLARY?OR?CONSEQUENTIAL
%DAMAGES?（INCLUDING?BUT?NOT?LIMITED?TO?PROCUREMENT?OF?SUBSTITUTE?
GOODS
%OR?SERVICES;?LOSS?OF?USE?DATA?OR?PROFITS;?OR?BUSINESS?INTERRUPTION）
%HOWEVER?CAUSED?AND?ON?ANY?THEORY?OF?LIABILITY?WHETHER?IN?CONTRACT
%STRICT?LIABILITY?OR?TORT?（INCLUDING?NEGLIGENCE?OR?OTHERWISE）?ARISING?
IN
%ANY?WAY?OUT?OF?THE?USE?OF?THIS?SOFTWARE?EVEN?IF?ADVISED?OF?THE
%POSSIBILITY?OF?SUCH?DAMAGE.
%
%-----------?2001?GMD?FIRST?Berlin?-?Stefan?Harmeling?-----------
%



%?the?size?is?needed?very?early
[rxcx]?=?size（x）;

%