The Lossless Compression parameter tab is shown as following:
Figure 1.
Lossless Compression Parameter Tab
- Compression/Decompression Mode
- Only Decompression mode is supported currently.
- File Compression Standard
- Choose the suitable File Compression Standard from the drop-down options. Possible options for this parameter are GZIP, ZLIB, 'GZIP and ZLIB'. When GZIP option is selected, CRC32 checksum calculation module gets used, whereas if ZLIB option is selected, Adler checksum calculation module gets used. 'GZIP and ZLIB' can be selected to support both the standards simultaneously which uses both CRC32 and Adler checksum calculation modules to validate the checksum present in the compressed file.
- History Window Size
- Select the suitable History Window Size from the drop-down options. Possible options for this parameter are 32768, 16384, 8192, 4096. Use the same or higher History Window Size using which the input file is compressed. If the user does not know the History Window Size used while compressing the file, use the default value of 32768.
- Input Data Width
- Choose the suitable Input Data Width from the drop-down options. Possible options for this parameter are 512, 256, 128, 64, 32. We recommend to use the default 128-bit input data width option for optimal resource and performance.
Note: Output Data Width of the Lossless Compression IP is fixed to 256-bit.