[xiph-commits] r8779 - trunk/theora/doc/spec

[tterribe at motherfish-iii.xiph.org]

Author: tterribe
Date: 2005-01-22 10:12:31 -0800 (Sat, 22 Jan 2005)
New Revision: 8779

Modified:
   trunk/theora/doc/spec/spec.tex
Log:
Update wording for undefined pixel aspect ratios to allow specification by an
 external means, just like for undefined color spaces.


Modified: trunk/theora/doc/spec/spec.tex
===================================================================
--- trunk/theora/doc/spec/spec.tex	2005-01-22 15:09:46 UTC (rev 8778)
+++ trunk/theora/doc/spec/spec.tex	2005-01-22 18:12:31 UTC (rev 8779)
@@ -2111,8 +2111,10 @@
  within a frame, defined as the ratio of the physical width of a pixel to its
  physical height.
 This is given by the ratio $\bitvar{PARN}:\bitvar{PARD}$.
-Either of these fields MAY be zero, in which case the pixel aspect ratio
- defaults to $1:1$.
+If either of these fields are zero, this indicates that pixel aspect ratio
+ information was not available to the encoder.
+In this case it MAY be specified by the application via an external means, or
+ a default value of $1:1$ MAY be used.
 \item
 Read an 8-bit unsigned integer as \bitvar{CS}.
 This is a value from an enumerated list of the available color spaces, given in