diff options
Diffstat (limited to 'src/modules/audio_processing/aecm/main/matlab/matlab/updateSettings.m')
| -rw-r--r-- | src/modules/audio_processing/aecm/main/matlab/matlab/updateSettings.m | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/modules/audio_processing/aecm/main/matlab/matlab/updateSettings.m b/src/modules/audio_processing/aecm/main/matlab/matlab/updateSettings.m new file mode 100644 index 0000000000..c805f1d09f --- /dev/null +++ b/src/modules/audio_processing/aecm/main/matlab/matlab/updateSettings.m @@ -0,0 +1,94 @@ +function [setupStructNew, delayStructNew] = updateSettings(microphone, TheFarEnd, setupStruct, delayStruct); + +% other, constants +setupStruct.hsupport1 = setupStruct.support/2 + 1; +setupStruct.factor = 2 / setupStruct.oversampling; +setupStruct.updatel = setupStruct.support/setupStruct.oversampling; +setupStruct.estLen = round(setupStruct.avtime * setupStruct.samplingfreq/setupStruct.updatel); + +% compute some constants +blockLen = setupStruct.support/setupStruct.oversampling; +delayStruct.maxDelayb = floor(setupStruct.samplingfreq*delayStruct.maxDelay/setupStruct.updatel); % in blocks + +%input +tlength = min([length(microphone),length(TheFarEnd)]); +updateno = floor(tlength/setupStruct.updatel); +setupStruct.tlength = setupStruct.updatel*updateno; +setupStruct.updateno = updateno - setupStruct.oversampling + 1; + +% signal length +n = floor(min([length(TheFarEnd), length(microphone)])/setupStruct.support)*setupStruct.support; +setupStruct.nb = n/blockLen - setupStruct.oversampling + 1; % in blocks + +setupStruct.win = sqrt([0 ; hanning(setupStruct.support-1)]); + +% Construct filterbank in Bark-scale + +K = setupStruct.subBandLength; %Something's wrong when K even +erbs = 21.4*log10(0.00437*setupStruct.samplingfreq/2+1); +fe = (10.^((0:K)'*erbs/K/21.4)-1)/0.00437; +setupStruct.centerFreq = fe; +H = diag(ones(1,K-1))+diag(ones(1,K-2),-1); +Hinv = inv(H); +aty = 2*Hinv(end,:)*fe(2:end-1); +boundary = aty - (setupStruct.samplingfreq/2 + fe(end-1))/2; +if rem(K,2) + x1 = min([fe(2)/2, -boundary]); +else + x1 = max([0, boundary]); +end +%x1 +g = fe(2:end-1); +g(1) = g(1) - x1/2; +x = 2*Hinv*g; +x = [x1;x]; +%figure(42), clf +xy = zeros((K+1)*4,1); +yy = zeros((K+1)*4,1); +xy(1:4) = [fe(1) fe(1) x(1) x(1)]'; +yy(1:4) = [0 1 1 0]'/x(1); +for kk=2:K + xy((kk-1)*4+(1:4)) = [x(kk-1) x(kk-1) x(kk) x(kk)]'; + yy((kk-1)*4+(1:4)) = [0 1 1 0]'/(x(kk)-x(kk-1)); +end +xy(end-3:end) = [x(K) x(K) fe(end) fe(end)]'; +yy(end-3:end) = [0 1 1 0]'/(fe(end)*2-2*x(K)); +%plot(xy,yy,'LineWidth',2) +%fill(xy,yy,'y') + +x = [0;x]; +xk = x*setupStruct.hsupport1/setupStruct.samplingfreq*2; +%setupStruct.erbBoundaries = xk; +numInBand = zeros(length(xk),1); +xh = (0:setupStruct.hsupport1-1); + +for kk=1:length(xk) + if (kk==length(xk)) + numInBand(kk) = length(find(xh>=xk(kk))); + else + numInBand(kk) = length(intersect(find(xh>=xk(kk)),find(xh<xk(kk+1)))); + end +end +setupStruct.numInBand = numInBand; + +setupStructNew = setupStruct; + +delayStructNew = struct(... + 'sxAll2',zeros(setupStructNew.hsupport1,setupStructNew.nb),... + 'syAll2',zeros(setupStructNew.hsupport1,setupStructNew.nb),... + 'z200',zeros(5,setupStructNew.hsupport1),... + 'z500',zeros(5,delayStruct.maxDelayb+1),... + 'bxspectrum',uint32(zeros(setupStructNew.nb,1)),... + 'byspectrum',uint32(zeros(setupStructNew.nb,1)),... + 'bandfirst',delayStruct.bandfirst,'bandlast',delayStruct.bandlast,... + 'bxhist',uint32(zeros(delayStruct.maxDelayb+1,1)),... + 'bcount',zeros(1+delayStruct.maxDelayb,setupStructNew.nb),... + 'fout',zeros(1+delayStruct.maxDelayb,setupStructNew.nb),... + 'new',zeros(1+delayStruct.maxDelayb,setupStructNew.nb),... + 'smlength',delayStruct.smlength,... + 'maxDelay', delayStruct.maxDelay,... + 'maxDelayb', delayStruct.maxDelayb,... + 'oneGoodEstimate', 0,... + 'delayAdjust', 0,... + 'delayNew',zeros(setupStructNew.nb,1),... + 'delay',zeros(setupStructNew.nb,1)); |