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BIT EXACT ROUND TRIP™ COMPRESSION
Better, faster, easier. That is the promise of new technology, and Pixspan delivers the Industry-leading Bit Exact Round Trip™ Compression Solution.
Bit Exact Compression means that an image is compressed into a smaller representation of the original image, whereby this representation holds absolutely all the information from the original image. That means that the representation can subsequently be decompressed back to an image, and that rehydrated image is the bit-for-bit exact replica of the original image. The before-image and the after-image can then be compared, typically with a Linux utility like diff, and that the two images will be equivalent. Other comparisons may include a MD-5 or other checksum utilities. Bit Exact Compression allows multiple compress/decompress cycles, and the result will always be equivalent to the original image. Such tests are called Generational Tests, and are common in image compression test suites, though more applicable to lossy forms of compression. Pixspan compression is intra-frame, meaning that each image is compressed without knowledge of other surrounding frames.
Bit Exact Compression is employed to save Storage Space and Transfer Times when the Images being stored or being transmitted are important, as with Master Images or Camera-Raw Images. The Bit Exact Round Trip™ Compression technology protects the fidelity of these images all the way through the workflow. The following diagram illustrates how an image is compressed by Pixspan into a Pixspan-Compressed format, and can then be decompressed by Pixspan into an exact replica of the original image file. Note that Pixspan-Compressed version permits the meta-data to be accessed as the original file would, allowing file inspection tools to operate on the compressed file in the normal fashion. Pixspan compresses only the raster portion of the file, not the meta-data portion.
Pixspan’s patented technology achieves superior data reduction with advanced mathematical algorithms without involving the use of DCT or wavelets, which consume large processing resources. As a result, Pixspan runs several times faster than other methods, requiring less computing to achieve the same speed. For example, a server with 2 Intel E5 12-core processors can operate at data center speeds, processing over 400 Megabytes per second, more than 1 Terabyte per hour, or approximately 1 Petabyte per month.
Pixspan is the only commercial software that covers all of the common imaging file formats across all industries, including full-resolution camera raw. Pixspan supports Digital Intermediate formats like DPX, OpenEXR, TIFF, and Cineon. Pixspan also supports Camera Raw Formats like Canon c500 Raw and ARRI Alexa 35/65 ARRIRaw. Contact Pixspan if you'd like to see support for other formats. The following list details the format types and configurations currently supported:
Pixspan Software runs on any Intel or AMD based off-the-shelf server (note: Pixspan does not sell hardware). Approximate performance metrics are shown in the following table:
Pixspan Performance Table
Pixspan Software supports the standard networking protocols of Gigabit Ethernet or Fibre Channel. Pixspan will work in tandem to any network transfer protocol agent to boost the effective transfer rate across networks.
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