diff util/classes/@audio/unbuffer.m @ 166:1495bdfa13e9 danieleb

Updated grassmanian function (restored old computation of the dictionary) and added functions to the audio class

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/classes/@audio/unbuffer.m	Mon Sep 19 14:53:23 2011 +0100
@@ -0,0 +1,27 @@
+function s = unbuffer(obj)
+
+%% Check inputs and Defaults
+if ~isprop(obj,'bufferOperator') || isempty(obj.bufferOperator)
+	error('You must buffer a signal before unbuffer it, come on!');
+end
+
+switch lower(obj.bufferOperator.method)
+	%Unbuffer using overlap-add method
+	case 'standard'
+		w = obj.bufferOperator.window(obj.bufferOperator.wLength);
+		S = diag(1./w)*obj.S;
+		%Non overlapping case
+		if obj.bufferOperator.overlap == 0
+			s = S(:);
+		%Overlapping case
+		else
+			Stemp = S(1:obj.bufferOperator.wLength-obj.bufferOperator.overlap,1:end);
+			s = [Stemp(:); S(obj.bufferOperator.wLength-obj.bufferOperator.overlap+1:end,end)];
+		end
+	%Unbuffer using inverse lot with identity local transform
+	case 'lot'
+		s = ilot(obj.S(:),obj.bufferOperator.wLength,'id',...
+			obj.bufferOperator.overlap,obj.bufferOperator.window);
+	otherwise
+		error('Please specify a valid buffer method');
+end