Compression Method optionsWhen Manual Select is chosen for the Compression Method, some or all of thefollowing options are available.For black and white images/pages only, select one of the following options:• Modified Modified Read (MMR): This setting is automatically selected when eitherPhoto and Text or Text is chosen for Original Type.• Modified Huffman (MH): This setting is automatically selected when Photo is chosenfor Original Type.• JBIG2 Arithmetic Encoded: This process has better compression performance thanthe Huffman encoded process. However, the compression rate is slower than Huffmanencoded and it uses more memory but yields better compression results.NoteJBIG stands for Joint Bi-level Image experts Group. JBIG compresses only black andwhite images.• JBIG2 Huffman Encoded: Huffman coding takes less page memory and has fastercompression and decompression than the arithmetic coding. Use this option ifhigh-quality compression results do not matter and you want to use less pagememory.For grayscale or color images/pages, select one of the following options:• JPEG: This is the default setting for grayscale/color pages.• Flate: This option saves the image data at a higher compression rate than JPEG.Flate is lossless and does not remove data during the compression process.PDF Security optionsThe following PDF Security options are available when selecting E-mail Options >File Format > PDF > PDF Security > Password:• Encryption Algorithm: Choose one of three encryption methods:- 128-bit RC4: Encrypts the file by using the 128-bit RC4 method. Files encryptedwith this method can be opened with Adobe® Acrobat® 5.0 or later.- 128-bit AES: Encrypts the file by using the 128-bit AES method. Files encryptedwith this method can be opened with Adobe® Acrobat® 7.0 or later.- 256-bit AES: Encrypts the file by using the 256-bit AES method. Files encryptedwith this method can be opened with Adobe® Acrobat® 9.0 or later.• File Open Password: This option sets a password for opening the PDF. The recipientof the PDF file must know the password before it can be opened.• Permissions: This option adds restrictions to the PDF file which prevents unauthorizedprinting or editing of the file. The recipient of the PDF must know the permissionspassword in order to remove these restrictions.Xerox® Color C75 Press6-10User GuideScan
