[xiph-commits] r6944 - trunk/theora/doc/spec
silvia at dactyl.lonelymoon.com
silvia
Fri Jul 2 03:09:04 PDT 2004
Author: silvia
Date: Fri Jul 2 03:09:04 2004
New Revision: 6944
Added:
trunk/theora/doc/spec/pic_even.fig
trunk/theora/doc/spec/pic_even_odd.fig
trunk/theora/doc/spec/pic_odd.fig
trunk/theora/doc/spec/pic_odd_even.fig
Modified:
trunk/theora/doc/spec/Makefile
trunk/theora/doc/spec/spec.tex
Log:
Added pictures for pixel correspondance between the color planes with
even/odd picture offset and size.
Modified: trunk/theora/doc/spec/Makefile
===================================================================
--- trunk/theora/doc/spec/Makefile 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/Makefile 2004-07-02 10:09:01 UTC (rev 6944)
@@ -10,14 +10,16 @@
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
+ pixel444.fig pixel422.fig pixel420.fig idct.fig fdct.fig \
+ pic_even.fig pic_even_odd.fig pic_odd.fig pic_odd_even.fig
FIG_TEXS = $(FIG_SRCS:.fig=.tex)
FIG_AUXS = $(FIG_SRCS:.fig=.aux)
FIG_OBJS = pic-frame.tex hilbert-mb.tex hilbert-block.tex xifish.pdf \
superblock.tex macroblock.tex raster-block.tex reference-frames.tex \
- pixel444.tex pixel422.tex pixel420.tex idct.pdf fdct.pdf
+ pixel444.tex pixel422.tex pixel420.tex idct.pdf fdct.pdf \
+ pic_even.tex pic_even_odd.tex pic_odd.tex pic_odd_even.tex
Theora_I_spec.pdf : spec.pdf
$(MV) $< $@
Added: trunk/theora/doc/spec/pic_even.fig
===================================================================
--- trunk/theora/doc/spec/pic_even.fig 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/pic_even.fig 2004-07-02 10:09:01 UTC (rev 6944)
@@ -0,0 +1,102 @@
+#FIG 3.2
+Landscape
+Center
+Metric
+A4
+100.00
+Single
+-2
+1200 2
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+4 0 0 50 -1 0 7 0.0000 4 90 210 2205 3060 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 90 210 3943 3098 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 75 285 4545 2655 Pixels\001
+4 0 0 50 -1 0 24 0.0000 4 30 270 5220 2295 ...\001
+4 0 0 50 -1 0 24 0.0000 4 30 270 4680 1755 ...\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 2205 1665 Frame: chroma (4:2:0 case)\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 450 585 Frame: chroma (4:2:2 case)\001
+4 0 0 50 -1 0 9 0.0000 4 75 615 4005 630 Frame: luma\001
Added: trunk/theora/doc/spec/pic_even_odd.fig
===================================================================
--- trunk/theora/doc/spec/pic_even_odd.fig 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/pic_even_odd.fig 2004-07-02 10:09:01 UTC (rev 6944)
@@ -0,0 +1,88 @@
+#FIG 3.2
+Landscape
+Center
+Metric
+A4
+100.00
+Single
+-2
+1200 2
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+-6
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+4 0 0 50 -1 0 7 0.0000 4 90 210 2205 3060 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 90 210 3943 3098 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 75 285 4545 2655 Pixels\001
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+4 0 0 50 -1 0 24 0.0000 4 30 270 4680 1755 ...\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 2205 1665 Frame: chroma (4:2:0 case)\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 450 585 Frame: chroma (4:2:2 case)\001
+4 0 0 50 -1 0 9 0.0000 4 75 615 4005 630 Frame: luma\001
Added: trunk/theora/doc/spec/pic_odd.fig
===================================================================
--- trunk/theora/doc/spec/pic_odd.fig 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/pic_odd.fig 2004-07-02 10:09:01 UTC (rev 6944)
@@ -0,0 +1,90 @@
+#FIG 3.2
+Landscape
+Center
+Metric
+A4
+100.00
+Single
+-2
+1200 2
+6 724 2025 945 2475
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+4 0 0 50 -1 0 7 0.0000 4 90 210 3943 3098 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 75 285 4545 2655 Pixels\001
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+4 0 0 50 -1 0 24 0.0000 4 30 270 4680 1755 ...\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 2205 1665 Frame: chroma (4:2:0 case)\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 450 585 Frame: chroma (4:2:2 case)\001
+4 0 0 50 -1 0 9 0.0000 4 75 615 4005 630 Frame: luma\001
Added: trunk/theora/doc/spec/pic_odd_even.fig
===================================================================
--- trunk/theora/doc/spec/pic_odd_even.fig 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/pic_odd_even.fig 2004-07-02 10:09:01 UTC (rev 6944)
@@ -0,0 +1,84 @@
+#FIG 3.2
+Landscape
+Center
+Metric
+A4
+100.00
+Single
+-2
+1200 2
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+4 0 0 50 -1 0 24 0.0000 4 30 270 765 1665 ...\001
+4 0 0 50 -1 0 24 0.0000 4 30 270 2430 2385 ...\001
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+4 0 0 50 -1 0 7 0.0000 4 90 210 2205 3060 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 90 210 3943 3098 (0,0)\001
+4 0 0 50 -1 0 7 0.0000 4 75 285 4545 2655 Pixels\001
+4 0 0 50 -1 0 24 0.0000 4 30 270 5220 2295 ...\001
+4 0 0 50 -1 0 24 0.0000 4 30 270 4680 1755 ...\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 2205 1665 Frame: chroma (4:2:0 case)\001
+4 0 0 50 -1 0 9 0.0000 4 105 1335 450 585 Frame: chroma (4:2:2 case)\001
+4 0 0 50 -1 0 9 0.0000 4 75 615 4005 630 Frame: luma\001
Modified: trunk/theora/doc/spec/spec.tex
===================================================================
--- trunk/theora/doc/spec/spec.tex 2004-07-01 20:24:17 UTC (rev 6943)
+++ trunk/theora/doc/spec/spec.tex 2004-07-02 10:09:01 UTC (rev 6944)
@@ -1444,7 +1444,7 @@
\label{fig:pixel444}
\end{figure}
-%TODO: Figure.
+% Figure.
%YRB YRB
%
%
@@ -1480,7 +1480,7 @@
\label{fig:pixel422}
\end{figure}
-%TODO: Figure.
+% Figure.
%Y RB Y Y RB Y
%
%
@@ -1521,7 +1521,7 @@
\label{fig:pixel420}
\end{figure}
-%TODO: Figure.
+% Figure.
%Y Y Y Y
%
% RB RB
@@ -1560,24 +1560,25 @@
relative to the luma samples depends on whether or not the X offset of the
picture region is odd.
If the offset is even, each column of chroma samples corresponds to two columns
- of luma samples.
+ of luma samples (see Figure~\ref{fig:pic_even} for an example).
The only exception is if the width is odd, in which case the last column
- corresponds to only one column of luma samples.
+ corresponds to only one column of luma samples (see Figure~\ref{fig:pic_even_odd}).
If the offset is odd, then the first column of chroma samples corresponds to
only one column of luma samples, while the remaining columns each correspond
- to two.
+ to two (see Figure~\ref{fig:pic_odd}).
In this case, if the width is even, the last column again corresponds to only
- one column of luma samples.
+ one column of luma samples (see Figure~\ref{fig:pic_odd_even}).
A similar process is followed with the rows of a picture region of odd height
encoded in the 4:2:0 format.
If the Y offset is even, each row of chroma samples corresponds to two rows of
- luma samples, except with an odd height, where the last row which corresponds
- to one.
+ luma samples (see Figure~\ref{fig:pic_even}), except with an odd height, where
+ the last row corresponds to one row of chroma luna samples only (see
+ Figure~\ref{fig:pic_even_odd}).
If the offset is odd, then it is the first row of chroma samples which
corresponds to only one row of luma samples, while the remaining rows each
- correspond to two, except with an even height, where the last row also
- corresponds to one.
+ correspond to two (Figure~\ref{fig:pic_odd}), except with an even height,
+ where the last row also corresponds to one (Figure~\ref{fig:pic_odd_even}).
Encoders should be aware of these differences in the subsampling when using an
even or odd offset.
@@ -1585,8 +1586,39 @@
or columns of luma samples for every row or column of chroma samples, the
encoder must take care to ensure that the offsets used are both even.
-%TODO: Figures!
+\begin{figure}[htbp]
+\begin{center}
+\include{pic_even}
+\end{center}
+\caption{Pixel correspondance between color planes with even picture offset and even picture size}
+\label{fig:pic_even}
+\end{figure}
+\begin{figure}[htbp]
+\begin{center}
+\include{pic_even_odd}
+\end{center}
+\caption{Pixel correspondance with even picture offset and odd picture size}
+\label{fig:pic_even_odd}
+\end{figure}
+
+\begin{figure}[htbp]
+\begin{center}
+\include{pic_odd}
+\end{center}
+\caption{Pixel correspondance with odd picture offset and odd picture size}
+\label{fig:pic_odd}
+\end{figure}
+
+\begin{figure}[htbp]
+\begin{center}
+\include{pic_odd_even}
+\end{center}
+\caption{Pixel correspondance with odd picture offset and even picture size}
+\label{fig:pic_odd_even}
+\end{figure}
+
+
\chapter{Bitpacking Convention}
\label{sec:bitpacking}
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