Differences between version 18 and predecessor to the previous major change of DVDVideoTerminology.
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| Newer page: | version 18 | Last edited on Monday, January 4, 2010 1:49:32 pm | by LawrenceDoliveiro | Revert |
| Older page: | version 17 | Last edited on Monday, July 13, 2009 3:19:10 pm | by LawrenceDoliveiro | Revert |
@@ -36,4 +36,9 @@
A button can be defined as an ''auto-action'' button. That is, the button function is invoked as soon as it is selected by the user, without having to press the "OK" key on the remote. This is used, for example, for "next page" and "previous page" options to implement multi-page menus.
[dvdauthor] doesn't bother defining any visible on-screen bounds or subpicture graphics for auto-action buttons. Presumably this is because any highlighting of such regions would never remain on-screen to be visible to the user for any length of time. However, the menu background can still provide on-screen graphics in the appropriate places (e.g. right-pointing-arrow/left-pointing-arrow for next-page/previous-page) that the user can interpret as indicating the presence of such buttons.
+
+!More on Audio
+DVD-Video is based on [MPEG]-2 files, and can use MPEG (specifically, MPEG Audio Layer 2) for its audio format. But it also allows for other audio formats: [Dolby AC-3|http://www.mpucoder.com/DVD/ac3hdr.html], [DTS|http://www.mpucoder.com/DVD/dtshdr.html] and uncompressed linear PCM (LPCM).
+
+Instead of defining extensions to the MPEG audio stream format to cater for these options, DVD-Video puts these in an [additional private stream|http://www.mpucoder.com/DVD/ass-hdr.html] in the MPEG file.
