1. (Traditionally) To squeeze a sound signal electronically in order to reduce the difference in volume between the quietest and loudest parts of the signal. Typically applied prior to transmission to boost average analogue or digital broadcast levels, the better to 'cut through' noisy listening environments, especially the car. 2. (In streaming) To massively reduce the size of a digitised audio or video file for streaming, by applying a specialist algorithm or software CODEC, e.g. MP3.
Takes something large and makes it smaller. Compression generally comes in two forms, lossy and lossless. Lossy compression is best used on graphics files and sound files. It crunches down the data at a much higher ratio, at the expense of having an image or a sound that isn't quite the same as before it was compressed. In the best scenario the data takes up less space, but the person viewing the graphic or listening to the sound file will not be able to tell. Lossless compression squeezes data down so that at some later date it can be uncompressed and returned to its exact structure. Lossless compression is best used on data files and programs.
As a noun, a cloth or another material applied under pressure to an area of the skin and held in place for a period of time. A compress can be any temperature (cold, luke warm, or hot) and it can be dry or wet. It may also be impregnated with medication or, in traditional medicine, an herbal remedy. Most compresses are used to relieve inflammation. As a verb, to squeeze or press together. An injury can compress the spinal cord.
to reduce the space required for storage (of binary data) by an algorithm which converts the data to a smaller number of bits while preserving the information content. The compressed data is usually decompressed to recover the initial data format before subsequent use.
(File size) Resampling, reducing a file size for streaming or sharing over the internet or intranet. Usually a lossy process, causing some loss of audio quality. REAL Media, MPEG, MJPEG, Microsoft wmv/wma are all examples of compressed media. Use Apple's Compressor to compress media. Any video that is not uncompressed, is compressed. HDV uses the MPEG compression format of 4:2:0, while NTSC DV uses 4:1:1.
For Level 4 detailed holdings statements, to condense one or more data elements through consolidation within one or more levels of data to express the same information with fewer characters. It can only be done when there is no gap in the level or levels to be compressed.
To compact data, such as video files, to save space. Compressing a file often removes redundant pieces of data that are restored when the file is decompressed. More agressive compression schemes can result in partial loss of data in favor of a small file size.
This is a compact way to store files containing text, data, or images. Compressed Windows files are known as ZIP files. Compacted Macintosh files are known as SIT, SEA, or HQX files. Special software is necessary to uncompress these files«Unzip for Windows, and Stuffit Expander for Macintosh.
This is a digital picture manipulator effect where the picture is made proportionally smaller. Pictures are analyzed looking for redundancy and repetition and unnecessary data is discarded. The technique was primarily developed for digital transmission but has been adopted as a means of handling digital video in computers and reducing the storage demands for digital VTRs. Compression can be at either a set rate or a variable rate. Also known as Bit Rate Reduction (BRR).
(1) To compact data to save space. (2) Common compression function on the Internet. Depending on the distribution of data in a file, compression may reduce its size by 25% to 70%. COMPRESS files are often, but not always, noted with the file extension .Z. Data archive and compression processes can be combined to form files like filename.tar.z (see TAR below). If you download a file with a file type showing that it is compressed, you will need a program to expand it before you can use it. Search the net for files starting with 'comp' (as in COMP430D.EXE) to find programs that can expand .Z-files.
The process of making a file smaller so that it will save disk space and transfer faster over a network. The most common compression utilities are PKZIP for IBM PC or compatible computers (.zip files) and Compact Pro (.cpt files) or Stuffit (.sit files) for Macintosh computers.
To reduce, using a variety of computer algorithms and other techniques, the amount of data required to accurately represent a video image or segment, thereby reducing the amount of space required to store it. Most types of compression, such as JPEG, cause some data to be lost. Compare with decompress.
To make data take up less space. Archiving programs do this, which means that files will take less time to transfer with modems. Many modems now have the ability to automatically compress the information they send and receive.
to condense one or more data elements through consolidation within one or more levels of data to express the same information with fewer characters. Data elements may be compressed only if there is not a gap in the level or levels to be compressed.
Data files available for download from the Internet are typically compressed in order to save server space and reduce transfer times. Typical file extensions for compressed files include zip (DOS/Windows) and tar (UNIX).
Generically, to make a file smaller by removing redundant information. Specifically, the Unix compress program that does just that. Files compressed with the Unix compress command end with a .Z suffix (always a capital Z). Compressed files may be expanded with the Unix command uncompress.