lossless

(algorithm, compression)

A term describing a data compression algorithm which retains all the information in the data, allowing it to be recovered perfectly by decompression.

Unix compress and GNU gzip perform lossless compression.

Opposite: lossy.

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

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.

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References in periodicals archive

OPPO said that the triple camera system seamlessly enables the 10x lossless zoom where the 48MP primary camera guarantees photo quality and the telephoto camera combined with the ultra-wide camera ensures high-quality long distance shots.

OPPO 3-in-1 camera trick is 10x lossless zoom technology

To address these problems further, in our previous work [ 10], we proposed an edge adaptive hierarchical interpolation (EAHINT) algorithm for lossless image coding and progressive transmission.

Multi-resolution Lossless Image Compression for Progressive Transmission and Multiple Decoding Using an Enhanced Edge Adaptive Hierarchical Interpolation

Engadget reports that sources from The Verge and Reddit users were the ones to make the discovery regarding Spotify's upcoming lossless offering, dubbed 'Spotify Hi-Fi'.

Spotify may soon serve up 'lossless' music

Suppose a pulse excites the ideal lossless chamber, the chamber can seem to be a system, and an arbitrary scalar electric field x(t) sampled in the working volume of the chamber is the response of the pulse.

A Fast Finite-Difference Time Domain Simulation Method for the Source-Stirring Reverberation Chamber

Although most engineered materials are not lossless, some interesting structures are made purely from metallic elements, and may be approximated as lossless.

Analysis of the Nicolson-Ross-Weir Method for Characterizing the Electromagnetic Properties of Engineered Materials

For DI in lossless format ZSNMB consists mostly of zeros.

Method of photomontage detection under conditions of limitations absence for photos falsification

* lossless rescaling of existing JPEG image files and other lossless transformation functions (crop, rotate, etc.)

Leipzig IT Specialists Provide New Software Library "libjpeg 9.2"

There are generally categorize addicted to two module called lossless and loss firmness procedure.

ANALYSIS OF VIDEO LECTURE'S IMAGES FOR THE COMPRESSION FORMATS SUPPORT FOR THE STUDENTS IN ELEARNING PARADIGM

A high performance lossless color image compression and decompression techniques (Hallnor et al, 2005 and Roy et al, 2001) is used to reduce both memory requirements and bandwidth.

An analysis of color image compression using Golomb-rice algorithm

Jared Stein, vice president of research and education at Instructure, said the focus this year will be on "lossless learning," a concept introduced at his company's InstructureCon this summer.

Get a grant for 'lossless learning'