[xiph-commits] r15741 - trunk/theora/doc/spec

[tterribe at svn.xiph.org]

Author: tterribe
Date: 2009-03-04 17:21:20 -0800 (Wed, 04 Mar 2009)
New Revision: 15741

Added:
   trunk/theora/doc/spec/lflim.fig
Modified:
   trunk/theora/doc/spec/Makefile.am
   trunk/theora/doc/spec/spec.tex
Log:
Add a figure illustrating the loop filter response function.


Modified: trunk/theora/doc/spec/Makefile.am
===================================================================
--- trunk/theora/doc/spec/Makefile.am	2009-03-05 01:01:06 UTC (rev 15740)
+++ trunk/theora/doc/spec/Makefile.am	2009-03-05 01:21:20 UTC (rev 15741)
@@ -16,7 +16,8 @@
 FIG_SRCS = pic-frame.fig hilbert-mb.fig hilbert-block.fig xifish.fig \
            superblock.fig macroblock.fig raster-block.fig reference-frames.fig \
            pixel444.fig pixel422.fig pixel420.fig idct.fig fdct.fig \
-           pic_even.fig pic_even_odd.fig pic_odd.fig pic_odd_even.fig
+           pic_even.fig pic_even_odd.fig pic_odd.fig pic_odd_even.fig \
+           lflim.fig
 
 FIG_TEXS = $(FIG_SRCS:.fig=.tex)
 FIG_AUXS = $(FIG_SRCS:.fig=.aux)

Added: trunk/theora/doc/spec/lflim.fig
===================================================================
--- trunk/theora/doc/spec/lflim.fig	                        (rev 0)
+++ trunk/theora/doc/spec/lflim.fig	2009-03-05 01:21:20 UTC (rev 15741)
@@ -0,0 +1,23 @@
+#FIG 3.2  Produced by xfig version 3.2.5
+Landscape
+Center
+Inches
+Letter  
+100.00
+Single
+-2
+1200 2
+2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 600 2400 5400 2400
+2 1 2 1 0 7 50 -1 -1 3.000 0 0 -1 1 0 2
+	1 1 1.00 60.00 120.00
+	 3000 4200 3000 600
+2 1 0 2 0 7 50 -1 -1 0.000 0 0 -1 0 0 6
+	 600 2400 1200 2400 2100 3300 3900 1500 4800 2400 5400 2400
+4 1 0 50 -1 1 12 0.0000 0 195 615 1200 2325 (-2L,0)\001
+4 1 0 50 -1 1 12 0.0000 0 195 600 2100 3525 (-L,-L)\001
+4 0 0 50 -1 1 12 0.0000 0 150 360 3075 825 lflim\001
+4 1 0 50 -1 1 12 0.0000 0 195 480 3900 1425 (L,L)\001
+4 1 0 50 -1 1 12 0.0000 0 195 555 4800 2625 (2L,0)\001
+4 0 0 50 -1 1 12 0.0000 0 150 135 5250 2625 R\001

Modified: trunk/theora/doc/spec/spec.tex
===================================================================
--- trunk/theora/doc/spec/spec.tex	2009-03-05 01:01:06 UTC (rev 15740)
+++ trunk/theora/doc/spec/spec.tex	2009-03-05 01:21:20 UTC (rev 15741)
@@ -7100,6 +7100,14 @@
 \section{Loop Filtering}
 \label{sec:loopfilter}
 
+\begin{figure}[htbp]
+\begin{center}
+\includegraphics{lflim}
+\end{center}
+\caption{The loop filter response function.}
+\label{fig:lflim}
+\end{figure}
+
 The loop filter is a simple deblocking filter that is based on running a small
  edge detecting filter over the coded block edges and adjusting the pixel
  values by a tapered response.
@@ -7114,7 +7122,7 @@
 \end{array}\right.
 \end{align*}
 Here \bitvar{L} is a limiting value equal to $\bitvar{LFLIMS}[\idx{qi0}]$.
-It defines the peaks of the function.
+It defines the peaks of the function, illustrated in Figure~\ref{fig:lflim}.
 \bitvar{LFLIMS} is an array of values specified in the setup header and is
  indexed by \idx{qi0}, the first quantization index for the frame, the one used
  for all the DC coefficients.