Menu
▾
▴
[Octave-cvsupdate] SF.net SVN: octave:[5940] trunk/octave-forge/main/signal/inst
|
From: <ha...@us...> - 2009-06-14 18:06:29
|
Revision: 5940
http://octave.svn.sourceforge.net/octave/?rev=5940&view=rev
Author: hauberg
Date: 2009-06-14 18:06:28 +0000 (Sun, 14 Jun 2009)
Log Message:
-----------
Sign error in documentation (from Torsten Finke)
Modified Paths:
--------------
trunk/octave-forge/main/signal/inst/dct.m
trunk/octave-forge/main/signal/inst/idct.m
Modified: trunk/octave-forge/main/signal/inst/dct.m
===================================================================
--- trunk/octave-forge/main/signal/inst/dct.m 2009-06-13 22:41:22 UTC (rev 5939)
+++ trunk/octave-forge/main/signal/inst/dct.m 2009-06-14 18:06:28 UTC (rev 5940)
@@ -23,7 +23,7 @@
## The discrete cosine transform X of x can be defined as follows:
##
## N-1
-## X[k] = w(k) sum x[n] cos (pi (2n-1) k / 2N ), k = 0, ..., N-1
+## X[k] = w(k) sum x[n] cos (pi (2n+1) k / 2N ), k = 0, ..., N-1
## n=0
##
## with w(0) = sqrt(1/N) and w(k) = sqrt(2/N), k = 1, ..., N-1. There
@@ -37,7 +37,7 @@
## the discrete cosine transform of x at k is as follows:
##
## N-1
-## X[k] = sum 2 x[n] cos (pi (2n-1) k / 2N )
+## X[k] = sum 2 x[n] cos (pi (2n+1) k / 2N )
## n=0
##
## which can be computed using:
Modified: trunk/octave-forge/main/signal/inst/idct.m
===================================================================
--- trunk/octave-forge/main/signal/inst/idct.m 2009-06-13 22:41:22 UTC (rev 5939)
+++ trunk/octave-forge/main/signal/inst/idct.m 2009-06-14 18:06:28 UTC (rev 5940)
@@ -23,7 +23,7 @@
## The inverse discrete cosine transform x of X can be defined as follows:
##
## N-1
-## x[n] = sum w(k) X[k] cos (pi (2n-1) k / 2N ), k = 0, ..., N-1
+## x[n] = sum w(k) X[k] cos (pi (2n+1) k / 2N ), k = 0, ..., N-1
## k=0
##
## with w(0) = sqrt(1/N) and w(k) = sqrt(2/N), k = 1, ..., N-1
This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.
|
