Takes something large and makes it smaller. Compression generally comes in two forms: lossy and lossless. Lossy compression is best used on graphics files...

This is when data file size is reduced by elimination unnecessary information.

The general term for the various algorithms and programs developed to transmit data in a format that saves storage space. A compression program is used to convert data from the original format to one optimized for compactness. A decompression algorithm returns the information to its original format.

Storing data to take up less space (e.g. zip files).

program which force data into less space on the storage medium

Essentially it means using computing method of compress data or files to take less space. Popular data compression tools on windows platforms include WinZip, WinRAR etc

Reducing the storage space needed for data by compressing repeating information, such as a string of blank spaces in a text file or a block of pixels the same colour in a graphic image.

The generic term for any one of a number of techniques used to reduce the number of bits transferred in unit time without modifying the informational content of a message.

The process of decreasing the amount of storage needed to hold a digital file.

Data compression is the process by which data is reduced in size when it is sent from your computer to your modem, and then expanded to its original size by the receiving modem. Since the transmitted data has been compressed, it takes less time to send.

A technique in which as much superfluous information as possible is removed from the data. Example: a repeating sequence can also be stored as the value and the number of repetitions.

In computer engineering, 'compression' is the term used for the reduction of the memory space required for data by optimizing the binary notation of the information. Depending on the nature of the original data and their coding, compression ratios of 1 : 100 and more can be achieved in this way, thus saving memory space and/or transfer time. A distinction is made between compression methods that involve a (more or less acceptable) loss of information and 'non-lossy' methods. Typical 'lossy' methods are JPEG for images and MP3 for music. Methods for compressing numerical data, such as MNP5 and V.42bis for data transmission, and also compression methods for files (zip, lha, rar, etc.), are of the non-lossy type for obvious reasons

Data can be made smaller by special compression programs without losing any information. This is done to make transmission (e.g. by modem) more efficient or to save space (on a storage medium). Common file formats for compressed files and archives are ZIP, RAR, and ARJ. Viruses are often spread in compressed form and then use their own decompression routines.

The reduction of the number of bits required to represent data through application of compression algorithms (e.g. by codecs).

Application of an algorithm to reduce the bit rate of a digital signal.

A technique for storing and transmitting data in a format that requires less space than usual.

A method of storing data in a format that requires less space than usual.

Processing data to reduce storage and bandwidth requirements. Some compression methods result in the loss of some information, which may or may not be clinically important.

To reduce transmission time, data is compressed using MH (Modified Huffman), MR (Modified Read) and MMR (Modified Modified Read) compression techniques. JBIG (Joint Binary Imaging Group) is another optional compression method that is especially effective when transmitting halftone images.

The process of compressing information in a computer file into a format that uses less computing space. When the file is to be used, it must be decompressed.

Digital cameras don't have the massive amounts of storage a computer does, yet they create files that can be quite large. Because of this, the camera compresses the data to make the optimum use of the limited space available. The less compression used, the better the image. The more compression used, the more images can be stored.

The reduction of data by removing repetitive data or place holders and replacing them with shorter strings of data in order to reduce the size of a file. This is done in such a way that the original data can later be restored to the file with little or no loss of integrity.

Compressing a file of data for purposes of transmission or storage without losing perceivable quality.

The elimination of redundant data without loss of information

A method of reducing secondary storage requirements for computer files.

Reduces the memory requirements of a saved file by using mathematical algorithms. In the case of lossless compression, this is done without forfeiting any of the quality, whereas so-called loss compressions (such as JPEG in the case of pictures), allow greater compression at the cost of some loss of data.

story data in a format that requires less space than usual, compressing data is the same as packing information

A process of data encoding based on locating and cutting out repeating data strings. When the data is read back, the cut out string is restored. Depending on the file format, some 80% of compression could be achieved. Other "denser" file formats will not benefit from compression at all.

Conversion of a digital image to a lower number of bits for storage.

To take files on a disk and make them smaller. Often used for transmitting files through a modem (thereby reducing the time spent on the phone) and for storing files on a hard disk so that they take up less space. You have to uncompress them before you can use them.

A method of reducing the size of an image file.

the compression of information to decrease transferred file size. MNP5 and V.42bis are the best known types

A technique that provides for the transmission or storage, without noticeable information loss, of few data bits than were originally used when the data was created.

Storing data in a format that requires less space than usual. Useful in communications because it enables devices to transmit the same amount of data in fewer bits, or in backup utilities, spreadsheet applications, and database management systems to reduce storage and memory space used.

A method of reducing the amount of data to be transmitted. Compression reduces the number of bits needed to represent the data send.

Techniques to reduce the amount of computer memory space or transmission resources required to handle a given quantity of data usually achieved through the application of mathematic algorithms to the data transformation process.

Data compression (or data reduction) reduces the information in a digital music file by removing non-essential data, reducing the size of the file by as much as 15 to one. The process makes it possible for satellite radio providers to store, transfer, and broadcast huge quantities of musical information. Satellite radio data compression can be compared sonically to a well-tweaked MP3 file at a moderate compression ratio — near CD-quality sound with excellent stereo image, a step up from FM.

the encoding of data in less than one byte per character for text, and in as little as one or two bits per pixel for images.

Permits increased storage capacities using a mathematical algorithm that reduces redundant strings of data; can be performed by software or hardware.

The ability of a modem or other device to compress data or a file before it is transmitted across the phone line or other network cable in order to make the transfer faster. The same type of data compression methods must be supported on both the transmitting end and the receiving end in order for there to be any compression. A typical compression ratio found in modems is 4:1. In reality, the likelihood of obtaining that high of a compression ratio is slim. If you've ever come across instructions telling you to set your maximum speed to 115,200 bps for a 28,800 bps modem, notice that 115,200 is 4 times 28,800. It's set that way to accommodate the 4:1 compression ratio that the modem can use. Common types of data compression:    V.42 bis -- see:    MNP 5

Literally to "compress" or reduce the amount of space any data (text, pictures, etc.) take up in a computer. Generally on pc's programs like "ZIP" can reduce the size a picture takes on your hard drive by half or more.

Any operation or transformation to reduce the amount of stored or transmitted data.

Process for reducing file sizes without loss of information. A frequent application is the reduction in size of image files.

A procedure that uses mathematical techniques to encode data so that it uses less space. In most cases, data must be decompressed into its original form to be usable.

Compression is the reduction in size of data in order to save space or transmission time. For data transmission, compression can be performed on just the data content or on the entire transmission unit (including header data) depending on a number of factors

The storing of data in a manner that requires less space on the storage medium.

A technique used to reduce the amount of data that is required to be stored or transmitted in a digital system. Where there is redundant data this compression can usually occur without a loss of noticeable quality.

A technique for increasing a storage system's ability to hold information. By applying mathematical algorithms to shrink the space needed for computer data, the data can be stored in a fraction of the original space, or transmitted within a fraction of the amount of time required by non-compressed data.

Any technique that condenses the available data so as to make data storage or transmission more efficient with minimal loss of information.

The coding of data (files) to save storage space or transmission time. Although data is already coded in digital form for computer processing, data compression re-codes the data more efficiently (using fewer bits). Go to Data Compression page for more details.

This is an algorithm used for storing information at a fraction of its original/normal size.

the storage of data so that it requires less space than it might otherwise. There are many methods of data compression. For example, rather than write a string of 60 of the same characters, a programmer would write, “the following character is repeated 60 times.” Data compression is especially useful when transmitting graphics via a modem because it allows the image to load more quickly.

See compression.

A technique that allows more data to be stored on a given tape. Most manufacturers assume a 2 to 1 data compression can be achieved (i.e. 2 MB of data on 1 MB of tape), but actual results depend on the data being stored.

Reducing the amount of data used to describe a signal.

A process that reduces the amount of data needed to store or send a video or audio signal.

Storing data in a format that requires less space than usual. Data compression is particularly useful in communications because it enables devices to transmit the same amount of data in fewer bits. Certain types of data, such as bit-mapped graphics, can be compressed to a small fraction of their normal size.

data compression data integrity

Reducing the size of a file or data in general. Several compression techniques are use to save time during transfer/communication or space during storage.

A method of reducing the amount of data to be transmitted by applying one of several techniques that reduce the number of bits needed to represent the information.

Reducing the size of a file of data by eliminating unnecessary information, such as blanks, and redundant data. The idea of reducing the size is to save money on transmission or to save money on storing data.

The encoding of text or data so that it takes up less space (fewer bits). CCITT V.42bis and MNP class 5 are two different data compression protocols. Data compression allows your modem to transmit more information in a shorter period of time and thus increases your modem's data throughput.

a technique for removing portions of electronically stored data using an algorithm that will restore the data when needed. This process reduces the storage space and the time required per file for transmission. A 10:1 compression ratio (10 pixels reduced to 1) is considered acceptable.

A technique that examines transmitted data for redundancy and replaces strings (groups) of characters with special codes which the receiving modem interprets and restores to its original form. Transmission of compressed data results in shorter connect times and hence cost savings for connect charges. Data compression is sometimes called "source encoding".

Data compression removes redundancy in transmitted bit patterns and subsequently reduces transmission rates by 20% to 200%. For example, a modem that is designed to receive and send data at 1200 bps without data compression might be capable of supporting 2400 bps if it uses data compression, even if it used the same network and analog voice-grade channel.

A method of reducing the size of files, such as image files, by representing the sets of binary numbers in the file with shorter string that conveys the same information. Many image editing programs offer some sort of image compression as an optical mode when saving a file to disk.

Reduces storage space that data takes up by replacing data redundancies with notations.

A group of hardware-based and/or software-based techniques that are designed to reduce the amount of storage space required for a given quantity of information.

A method of reducing the number of bits that are needed to represent information. Data compression allows gigher communications speeds and allows more information to be stored on a disk.

Methods of reducing the number of bits in a set of data so it can be transmitted more quickly over the network and then expanded back to its original size when it reaches the destination.

Storing data in a format that requires less space than usual. Compressing data is the same as packing data. Data compression is particularly useful in communications because it enables devices to transmit the same amount of data in fewer bits (requiring less time). There are a variety of data compression techniques, but only a few have been standardised.

A digital prepress term referring to the technique of reducing the amount of storage required to hold a digital file to reduce the disk space the file requires and allow it to be processed or transmitted more quickly.

Term used in information technology for the reduction of memory space required for data by optimizing the binary notation of the information. Depending on the nature of the original data and their coding, compression ratios of 1:100 and higher can be achieved. A distinction is made between compression methods that involve loss of information and "non-lossy" or lossless methods. Typical "lossy" methods include the JPEG format for images or the MP3 format for music clips. Methods for compressing numerical data, such as MNP5 and V.42bis for data transmission, and compression methods for files (zip, lha, rar, etc.), are of the lossless variety.

An automated process in which data is compressed and wrapped by removing trailing blanks and spaces from segments, groups and /or transactions. Data compression reduces data field information to its minimum for cost effectiveness.

Method of reducing the amount of bandwidth required to transmit information, thus increasing the speed of transmission.

reduces the number of bits of information needed to store or transmit messages.

Reducing the size of a data file by reducing unnecessary information, such as blanks and redundant data.

A method whereby data can be reduced in size for storage or transmission purposes.

Techniques for reducing the amount of storage needed for a given amount of data. They include word tokenization (in which frequently used words are stored as shorter codes), variable bit lengths (in which common characters are represented by fewer bits than less common ones), and run-length encoding (in which a repeated value is stored once along with a count). There are two main forms: In lossless compression the original file is retrieved unchanged after decompression. Such compression is necessary for documents; some types of data (sound and pictures) can be stored by lossy compression where some detail is lost during compression, but the loss is not noticeable. Lossy compression allows a greater level of compression. The most popular compression program is PKZIP, widely available as shareware.

To speed up the dataflow between two computers, compression has the result that less bytes go over the line and thus it goes faster. On the other side the data gets decompressed and can then be used. This uses CPU time, but CPU is cheaper than the connect time so this makes a lot of sense.

Reducing the amount of electronic "space" data takes up. Methods include replacing blank spaces with a character count, or replacing redundant data with shorter stand-in "codes". No matter how data is compressed, it must be decompressed before it can be used.

A machine to machine type of shorthand that abbreviates long strings of bits of information that are all the same by substituting a predetermined code. The three types of data compression are Modified Huffman (MH), Modified Read (MR), and Modified Modified Read (MMR). Data compression results in a faster transmission time.

See compress.

A technique that saves storage space by eliminating gaps, empty fields, redundancies, or unnecessary data to shorten the length of records or blocks.

A technique to shrink or reduce the size of a data file so it takes up less storage space and is faster to move electronically. Compression is accomplished by removing "blank" spaces and repetitive data and using a mathematical formula to replace them. A compressed file is decompressed before it is used.

The process of converting data from one format to another format that is physically smaller in size. The same logical information is stored using less physical information.

Any method of encoding data so that it occupies less space than in its original form. Many different mathematical techniques can be used, but the overall purpose is to compress the data so that it ca ... more

In computer science and information theory, data compression or source coding is the process of encoding information using fewer bits (or other information-bearing units) than an unencoded representation would use through use of specific encoding schemes. For example, this article could be encoded with fewer bits if one were to accept the convention that the word "compression" be encoded as "comp". One popular instance of compression with which many computer users are familiar is the ZIP file format, which, as well as providing compression, acts as an archiver, storing many files in a single output file.