lossless compression


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lossless compression

A compression technique that decompresses data back to its original form without any loss. The decompressed file and the original are identical. All compression methods used to compress text, databases and other business data are lossless. For example, the ZIP archiving technology (PKZIP, WinZip, etc.) is the most widely used lossless method (see ZIP file).

Lossless vs. Lossy Audio
Audio and video use "lossy" compression, which means bits deemed unnecessary for human hearing or viewing are discarded and never restored. However, for high-quality music listening, there are also lossless audio compression methods. For example, FLAC, Apple Lossless (ALAC) and WMA Lossless compress audio files on a music CD to less than their original size. The resulting files are nowhere near as small as the lossy MP3 and AAC methods but no bits (no frequencies) are discarded. See lossy compression, high-resolution audio, Apple Lossless, WMA Lossless, FLAC and codec examples.


References in periodicals archive ?
When we develop JPEG compression, lossless compression the InfiniVision IP by using our tools, we can get a much faster delivery date,' stated Ofer.
It supports lossless compression and is performed in two passes namely sorting pass and refinement pass.
By introducing visually lossless compression into our GPUs, we can now guarantee a reduction in memory bandwidth and usage.
For this reason, a lossless compression algorithm has been applied to this area.
Previously, in determining whether to apply lossless compression to data based on the identification of duplication in that data, it was necessary to read the data twice, both before and after the duplication identification was executed on the FPGA, increasing overhead and preventing the system from delivering sufficient performance.
Wu, "Lossless compression of continuous-tone images via context selection, quantization, and modeling," IEEE Transactions on Image Processing, vol.
For the results to be relevant, JPEG2000 lossless compression was used and the resulting foreground and background layers were kept at original image sizes (mipmap level to return is zero).
The quantized frequency coefficients are replaced by Huffman codes, which provides lossless compression and hence it is named as "noiseless".
Based on lossless compression technology co-developed with the Weizmann Institute of Science, Geneformics D is an enterprise-grade Infrastructure as a Service for genomics cloud installations.
This chapter discusses two ways to measure and quantify information: Shannon for internal information, and Kolmogorov-Chaitin-Solomonov (KCS) for complexity, or lossless compression. Several examples are presented to show how these equations are applied.
Some VLC scalar quantizers with Huffman's code and similar ones are analysed in [5]-[9], whereby [8] studies VLC for lossless compression. GR coding is simpler than Huffman, although the latter is by custom used for smaller code books.
Embedded Transform Coding Based Lossless Compression in Compressive Spectral Imaging with Coded Aperture.