Re: Multimedia Site Updates

Mike Melanson wrote:

>Hi,
>	I have 2 new Multimedia Exploration Journal Entries posted:
>  http://home.pcisys.net/~melanson/codecs/mmjournal.html
>Highlights include a holographic arcade game ported to the PC, a game
>based on a breakfast cereal, some curious multimedia patents for stitching
>random video clips together to simulate real-time user interaction, and
>some new CD-ROM types (Jaguar and TurboGrafx-CD).
>
>	On a related note, does anyone have any idea how to extract data
>from a Jaguar CD?
>
http://db.gamefaqs.com/console/jaguar/file/atari_jaguar.txt

--

Q. What's the information on the CD-ROM drive?

A. A double-speed CD-ROM drive was available.  The CD drive has an access
   time of 210 milliseconds, and has a sustained data transfer rate of 352.8K
   per second.  The CD-ROM drive features a modified data bus interface for
   access to the Tom and Jerry chips almost directly, allowing for a higher
   throughput rate on sound and graphics.  Storage on a disc is approximately
   790 megabytes (6,320 megabits).  The CD-ROM drive plugs into the Jaguar's
   cartridge slot.  A pass-through cartridge slot allows cartridges to be
   used with the CD-ROM attached.  Separate memory cartridges allow Jaguar CD
   games to be saved for later play.

   The Jaguar CD format is a non-standard format that is not compatable with
   the ISO-9660 standard.  It uses audio-format sectors for data, which
   allows for 2352 bytes of useable space in each sector.  Unfortunately,
   this leaves no provision for error correction or file system management
   (though errors are detected by the CD drive hardware).  Each disc is
   copy-protected with encrypted data that is specially formatted to look
   like an error.  Attempts to copy a Jaguar CD will fail because it cannot
   read the encrypted data, which means the copy will not work.

   The Jaguar CD allows delivery of full-screen, full-motion video.  The
   CinePak video decompression system has been licensed from SuperMac
   Technologies.  It is a 7K routine in the GPU and can be included in any
   CD-ROM software that needs it, allowing full-screen video at 24 frames per
   second.  Movie quality pictures can then be overlaid on the screen with
   computer generated graphics if the game demands it.  Time-Warner has
   licensed a library of film clips from its movies to Atari.


....

--

MvH

Benjamin Larsson

>
>	Also, thanks to Alex Beregszaszi for contributing several
>documents regarding all of the On2 video codec headers, various
>app-specific MP3 file extensions and SunPlus JPEG codecs. Further, I have
>a new document on Wing Commander/Xan video coding. Main site is at:
>  http://home.pcisys.net/~melanson/codecs/
>
>--
>	-Mike Melanson
>
>
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: SF.net Giveback Program.
>Does SourceForge.net help you be more productive?  Does it
>help you create better code?  SHARE THE LOVE, and help us help
>YOU!  Click Here: http://sourceforge.net/donate/
>_______________________________________________
>xine-codec-devel mailing list
>[email protected]
>https://lists.sourceforge.net/lists/listinfo/xine-codec-devel
>  
>




-------------------------------------------------------
This SF.net email is sponsored by: SF.net Giveback Program.
Does SourceForge.net help you be more productive?  Does it
help you create better code?  SHARE THE LOVE, and help us help
YOU!  Click Here: http://sourceforge.net/donate/