What's The Direct Print; Direct Print For Tiff And Jpeg Files; Direct Print; Data Processing - Canon AD1 Service Manual

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Functions > Basic Function > What's the Direct Print? > For TIFF Data:

What's the Direct Print?

A feature to transfer files from host PC terminals to the printer and interrupts the data to print
without a printer driver. The printer interprets and prints the files. It, thus, saves opening files
for printing.
To print, specify a PDF, TIFF, or JPEG file through the Remote UI.
The Direct Print feature includes printing with LPR commands through the command prompt.

■ Direct Print for TIFF and JPEG Files

The Direct Print is designed to use in the conditions below. It does not guarantee operations
other than those specified.

■ Direct Print:

The automatic emulation judge judges a print job of JPEG or TIFF data sent directly from a
host as a direct print data and the Direct Print interprets and prints the job.
There are two available sending methods shown below.
• Sending from the Remote UI.
Use a remote UI for the method to forward the PDF file from a host PC to the device and
forward a job to be printed. In this case, as a forwarding protocol, HTTP is used. Job of PDF
file using the remote UI cannot be forwarded from multiple host PCs simultaneously. While
one host PC forwards the PDF file and the other host PC requests to forward the PDF file, the
latter host PC which forwards the file has the error display. However, even while forwarding
the PDF file from one host terminal, the other host terminal can operate the remote UI and
forward the other PDL job simultaneously.
• Sending through the command prompt with a command such as "copy /b" and "lpr."
Use LPD for the method to forward the PDF file from a host PC to the device and forward a
job to be printed. Use LPR command as a method to forward a job. Job using LPD cannot
specify various print settings.

■ Data Processing:

The Direct Print can handle up to 4G bytes of data.
The Direct Print interprets image data (JPEG or TIFF) sent from a PC and saves the data in
the hard disk drive. The method to interpret and save the data varies by data type.
2 Functions > Basic Function > What's the Direct Print? > For TIFF Data:

■ For JPEG Data:

The Direct Print interprets data without saving in the hard disk drive. - Sequential method.

■ For TIFF Data:

The Direct Print always saves data in the hard disk drive first and then interprets the data. -
File access method
The Direct Print for image files complies with the specifications for ITU-T Recommendation
T.81.
TIFF data complies with the specifications of Adobe TIFF Revision 6.0.
The compatible and incompatible coding schemes for JPEG data are shown below.
• Compatible Coding Scheme
Basic DCT
• Incompatible Coding Schemes
Enhanced DCT
Reversible coding scheme
Hierarchical DCT
The compatible and incompatible coding schemes for TIFF data are shown below.
• Compatible Coding Schemes
Non-compression coding scheme
One-dimensional coding scheme defined in ITU-T Recommendation T.4
Two-dimensional coding scheme defined in ITU-T Recommendation T.4
Facsimile coding scheme defined in ITU-T Recommendation T.6
PackBits (Apple Macintosh PackBits)
• Incompatible Coding Scheme
LZW
JBIG defined in ITU-T Recommendation T.82
JBIG defined in ITU-T Recommendation T.43
MRC defined in ITU-T Recommendation T.44
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