JVC XV-NA7SL - Manual (Page 53)

JPEG disc playback
51
XV-NA7SL/LET0212-004A/English
JPEG disc playback
The unit can play back JPEG files on a personally
recorded CD-R/RW disc. We refer to a disc that contains
JPEG files as a "JPEG disc" in this manual.
Note that if a disc contains both of MP3 and JPEG files,
you can only play back files of the type selected by the
MP3/JPEG setting in the PICTURE preference display
(see page 59).
About JPEG discs
On a JPEG disc, each picture is recorded as a file. Files
are sometimes grouped into folders by category, etc.
Folders can exist within other folders, creating
hierarchical layers of folders. If you are familiar with
personal computers, the hierarchical file and folder
structure of a JPEG disc will be familiar to you as well.
This unit simplifies the hierarchical structure of a disc
and manages folders using "Groups," in the following
manner.
• A folder which has one or more files is regarded as a
Group.
• A folder which does not directly contain any files is
ignored.
• Files which do not belong to any folder are grouped
into "Group 1."
• The unit recognizes up to 150 files per Group, and up
to 99 Groups per disc. It ignores those exceeding the
maximum numbers and cannot display them. If there
are files other than JPEG files, they also count against
the 150-file total.
What is JPEG?
"JPEG" is an abbreviation for the Joint Photographic
Experts Group. "JPEG" is used to refer to an image file
format that utilizes a certain compression technique.
There are three sub-types of the JPEG format as
follows.
• baseline JPEG: used for digital cameras, the web,
etc.
• progressive JPEG: used for the web
• lossless JPEG: an old type, rarely used now
The unit supports only the baseline JPEG format;
Therefore, it cannot display pictures saved in the
progressive or lossless formats. If a JPEG disc
contains JPEG files of non-baseline type, the unit
recognizes those files as JPEG files, the JPEG
CONTROL display and the display window shows the
information of the contents (filename, file number,
etc.), but you cannot show the still pictures of those
files (the TV screen appears only in black).
NOTE
Make sure that the TV - DVD switch on
the remote control unit is set to "DVD"
when using the
5/∞/2/3, numeric
buttons for controlling the unit.
TV DVD
Group 1
File 1
Group 2
Group 1’
up to 150 files per directory
up to 99 Groups
per disc
NOTES for making your own JPEG disc
using a CD-R/CD-RW disc:
• Select "ISO 9660" as the disc format.
• Finalize the disc after completing recording.
• We recommend you record your material at a 640 x 480
pixel resolution.
• This unit supports only the baseline JPEG format.
Therefore, it cannot display pictures saved in the
progressive or lossless formats. If a JPEG disc contains
JPEG files of non-baseline type, the unit recognizes
those files as JPEG files. The JPEG CONTROL display
and the display window show the information of the
contents (filename, file number, etc.), but you cannot
show the still pictures of those files (the TV screen
appears only in black).
NOTES
• The unit does not support "packet writing" discs.
• If the disc is recorded with multiple sessions, the unit
supports up to five sessions.
• The unit may not be able to read some discs, or may
take a long time to display a picture on the disc, due to
disc characteristics or recording conditions.
• Programmed and random playback functions do not
work with JPEG discs.
• The screen saver function will be activated if the same
picture is displayed for more than 5 minutes except
during slide show playback (see page 54).
• The unit only can play back files with the following file
extensions; ".jpg," ".jpeg," ".JPG," ".JPEG" and any
other combination of upper case and lower case letters
(such as ".Jpg").
• If a JPEG file name includes any 2-byte character, the
unit may not show the file name correctly.
• If a picture has been saved at greater than 640 x 480
pixel resolution, it may take some time to display the
picture.
• The unit will not accept any commands (stopping
playback, zooming into or out of an image, etc.) while
in the process of displaying a picture.
• The time required to read the disc contents may vary
for different discs, depending on the numbers of
Groups (folders) and files recorded, etc.
• If you attempt to display a non-baseline JPEG image:
The unit will not be able to display the picture (the TV
screen will be black). Other operations (stopping
display, selecting a file, etc.) will be possible, but may
take a long time.
• While a JPEG disc is loaded, you cannot bring up any
preference display (see page 57).
• This unit does not support pixel size picture of more
than 2400 pixels. Make sure that the picture pixel size is
2400 pixels or less.
XV-NA7SL(B).book Page 51 Wednesday, July 31, 2002 1:00 PM