CONTROLLER
26 April, 2002
6-6
6.1.3 PRINT DATA PROCESSING
The key roles of each part of the print system are outlined below.
•
The
drivers
are responsible for generating the page description on the host
system and for transmitting data to the printer.
•
The
I/O manager
mediates the connection between the parallel port or
network interface and establishes a device or print manager connection.
•
The
print manager
is responsible for spooling the job (if appropriate) and for
feeding jobs to the correct PDL interpreter.
•
The
PDL interpreters
are responsible for turning page descriptions into
rendered pages and for parsing job management comments.
•
The
compression
subsystem manages compressed pages in memory.
•
The
page manager
coordinates pages for sending to the engine for the most
efficient printing, finishing, and accessory handling.
•
The
video
subsystem is responsible for decompressing pages and feeding
the engine with appropriate engine signals. The video subsystem also
handles certain print quality processing functions.
PostScript
generation
PCL
generation
Ethernet
Parallel
Spooling, PDL
switching
DSC
parsing
PostScript
PJL parsing
PCL 5e/5c
Page
Compression
Page
Compression
Decomp,
Video
Drivers
Connectivity
IO/Print/
Device Mgr
PDLs
Compression
Page Mgr
Video
Mgr
Finishing,
Engine loading
G082D904.WMF
