HP d640 HP D640 High-Volume Printer - Technical Reference Manual, C5630-90030 - Page 40

TIFF Images as Part of PCL, Introducing PCL Compression Method 10

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TIFF Images as Part of PCL Introducing PCL Compression Method 10 The PCL Compression Method command (*b#M) determines how raster data is interpreted for the Transfer Raster Data by Row/ Block command (*b#W). The selected compression method stays in effect until explicitly changed by another PCL Compression Method command (*b#M) or until it is reset by an End Raster Data command (*rC). See table below for a list of compression methods. Table 10 List of Compression Methods 0 Uncompressed (row-based) 1 Run-length encoding (row-based) 2 TIFF rev 4.0 "PackBits" encoding (row-based) 3 Delta row encoding (row-based) 4 Unencoded (block-based) 5 Adaptive encoding (block-based) 6 CCITT G3 one-dimensional encoding (block-based) 7 CCITT G3 two-dimensional encoding (block-based) 8 CCITT G4 encoding (block-based) 10 Tagged Image File Format (TIFF) rev 6.0 (block-based) PCL Compression Method 10 is useful when you have a monochrome graphic you want to include as an illustration on a page with PCL text. The actual format of accepted data is described in "TIFF Structure and Fields" on page 25. 34 Chapter 3: Working with TIFF Images

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34
Chapter 3: Working with TIFF Images
TIFF Images as Part of PCL
Introducing PCL Compression Method 10
The PCL Compression Method command (<ESC>*b#M) determines
how raster data is interpreted for the Transfer Raster Data by Row/
Block command (<ESC>*b#W). The selected compression method
stays in effect until explicitly changed by another PCL Compression
Method command (<ESC>*b#M) or until it is reset by an End Raster
Data command (<ESC>*rC).
See table below for a list of compression methods.
PCL Compression Method 10 is useful when you have a
monochrome graphic you want to include as an illustration on a page
with PCL text. The actual format of accepted data is described in
“TIFF Structure and Fields” on page 25.
Table 10
List of Compression Methods
0
Uncompressed (row-based)
1
Run-length encoding (row-based)
2
TIFF rev 4.0 “PackBits” encoding (row-based)
3
Delta row encoding (row-based)
4
Unencoded (block-based)
5
Adaptive encoding (block-based)
6
CCITT G3 one-dimensional encoding (block-based)
7
CCITT G3 two-dimensional encoding (block-based)
8
CCITT G4 encoding (block-based)
10
Tagged Image File Format (TIFF) rev 6.0 (block-based)