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Measurement of the power of a data compression algorithm
Data compression ratio, also known as compression power, is a measurement of the relative reduction in size of data representation produced by a data
Data_compression_ratio
Combustion chamber capacity ratio
The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine
Compression_ratio
Data compression approach allowing perfect reconstruction of the original data
Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss
Lossless_compression
Compact encoding of digital data
In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original
Data_compression
Metric used to measure signal quality
published a variant for varying frame delays. Czekanowski distance Data compression ratio Perceptual Evaluation of Video Quality (PEVQ) Structural similarity
Peak_signal-to-noise_ratio
Lossless compression algorithm
a good trade-off between speed and compression ratio. Typically, it has a smaller (i.e., worse) compression ratio than the similar LZO algorithm, which
LZ4_(compression_algorithm)
Lossless data compression algorithms
LZ77 and LZ78 are the two lossless data compression algorithms published in papers by Abraham Lempel and Jacob Ziv in 1977 and 1978. They are also known
LZ77_and_LZ78
Type of data compression
technology, lossy compression, or irreversible compression, is the class of data compression methods that uses inexact approximations and partial data discarding
Lossy_compression
Reduction of image size to save storage and transmission costs
Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage
Image_compression
Lossless compression algorithm
Deflate (stylized as DEFLATE, and also called Flate) is a lossless data compression algorithm that uses a combination of LZ77 and Huffman coding. It was
Deflate
Set of standards for multimedia file and streaming formats
– a video compression standard that doubles the data compression ratio compared to H.264/MPEG-4 AVC Part 3: 3D Audio – an audio compression standard for
MPEG-H
Audio signal processing operation
perceived effect. A limiter is a compressor with a high ratio and, generally, a short attack time. Compression is used to improve performance and clarity in public
Dynamic_range_compression
Performance metric for lossless compression
fictional tech start-up working on a data compression algorithm. It compares both required time and compression ratio of measured applications, with those
Weissman_score
Lossy audio compression format
widespread acceptance for PC and Internet applications. MP2 has a lower data compression ratio than MP3, but is also less computationally intensive. MPEG-1 Audio
MPEG-1_Audio_Layer_II
Type of GIS data format
convert SDC data to a geodatabase. ArcGIS Pro does not support the SDC format at all. Compression ratios range from 8x to 20x depending on the data source
Smart_Data_Compression
Standardized means of organizing and storing digital images
it features a high data compression ratio, based on a subset of the HEVC video compression standard, including lossless compression. In addition, it supports
Image_file_format
Topics referred to by the same term
forces Compression member, a structural element such as a column Compressibility, susceptibility to compression Gas compression Compression ratio, of a
Compression
Digital audio format
speech-coding algorithm with auditory masking that achieved a significant data compression ratio for its time. IEEE's refereed Journal on Selected Areas in Communications
MP3
Universal lossless data compression algorithm
best on data with repeated patterns, so the initial parts of a message see little compression. As the message grows, however, the compression ratio tends
Lempel–Ziv–Welch
Measure of material deformation perpendicular to loading
Poisson's ratio is near 0.5. For open-cell polymer foams, Poisson's ratio is near zero, since the cells tend to collapse in compression. Many typical
Poisson's_ratio
Technique to compress data
not always optimal among all compression methods – it is replaced with arithmetic coding if a better compression ratio is required. In 1951, David A
Huffman_coding
Methods of compressing data tailored specifically for genomic data
typically the case in genomic sequence data). The compression ratio of currently available genomic data compression tools ranges between 65-fold and 1,200-fold
Compression of genomic sequencing data
Compression_of_genomic_sequencing_data
Maximum rate of data transfer
DCT compression significantly reduces the amount of memory and bandwidth required for digital signals, capable of achieving a data compression ratio of
Bandwidth_(computing)
HTTPS security vulernability
CRIME (Compression Ratio Info-leak Made Easy) is a security vulnerability in HTTPS and SPDY protocols that utilize compression, which can leak the content
CRIME
Algorithms for compressing in-memory data
memory compression (also referred to as RAM compression and memory compression) is a memory management technique that utilizes data compression to reduce
Virtual_memory_compression
Fast data compression and decompression library written in C++ by Google
mode. The compression ratio is 20–100% lower than gzip. Snappy is widely used in Google projects like Bigtable, MapReduce and in compressing data for Google's
Snappy_(compression)
Lossless data compression method
Golomb coding is a lossless data compression method using a family of data compression codes invented by Solomon W. Golomb in the 1960s. Alphabets following
Golomb_coding
Lossless compression algorithm
is tunable with compression levels ranging from negative 7 (fastest) to 22 (slowest in compression speed, but best compression ratio). Starting from version
Zstd
Video of higher resolution than original television
DCT compression significantly reduced the amount of memory and bandwidth required for digital video, capable of achieving a data compression ratio of around
High-definition_video
Lossless compression algorithm
data compression algorithm developed by Jyrki Alakuijala and Zoltán Szabadka. It uses a combination of the general-purpose LZ77 lossless compression algorithm
Brotli
Class of video frames processed in a distinct way by a compression algorithm
different advantages and disadvantages, centered mainly around amount of data compression. These different algorithms for video frames are called picture types
Video compression picture types
Video_compression_picture_types
Computer format for digital audio
lossy compression. The data can be a raw bitstream in an audio coding format, but it is usually embedded in a container format or an audio data format
Audio_file_format
Data format and compression library
zlib (/ˈziːlɪb/ or "zeta-lib", /ˈziːtəˌlɪb/) is a data format and a lossless data compression software library created by Jean-loup Gailly and Mark Adler
Zlib
Topics referred to by the same term
in data compression: Universal code (data compression), a fixed prefix code that, for any probability mass function, has a data compression ratio within
Universal_coding
Type of prefix code
In data compression, a universal code for integers is a prefix code that maps the positive integers onto binary codewords, with the additional property
Universal code (data compression)
Universal_code_(data_compression)
Lossless compression algorithm
dictionary compression scheme somewhat similar to the LZ77 algorithm published by Abraham Lempel and Jacob Ziv in 1977 and features a high compression ratio (generally
LZMA
Lossless data compression scheme
lossless data compression method that attempts to approach the lower bound declared by Shannon's source coding theorem, which states that any lossless data compression
Entropy_coding
Electronic moving image
century, digital video has become the dominant form, enabling efficient compression, storage, editing, and distribution across broadcast television, physical
Video
Series of data compression archivers
lossless data compression archivers that have gone through collaborative development to top rankings on several benchmarks measuring compression ratio (although
PAQ
Capability that can be built into web servers and web clients
HTTP compression is a capability that can be built into web servers and web clients to improve transfer speed and bandwidth utilization. HTTP data is compressed
HTTP_compression
Technique used in signal processing and data compression
achieving high quality at high data compression ratios. However, blocky compression artifacts can appear when heavy DCT compression is applied. The DCT was first
Discrete_cosine_transform
leakage is the leakage of secret information via data compression, by using variations in data compression ratio to reveal correlations between known (or deliberately
Information_leakage
Data processing technique to eliminate duplicate copies of repeating data
to the saved copy for deduplication ratio of roughly 100 to 1. Deduplication is often paired with data compression for additional storage saving: Deduplication
Data_deduplication
Open-source file archiver
found that the 7z compression was at least 17% better than ZIP, and 7-Zip's own site has since 2002 reported that while compression ratio results are very
7-Zip
Binary XML format
used. Nevertheless, even in schemaless mode, EXI delivers better data compression ratios than Fast Infoset while being more efficient in both processing
Efficient_XML_Interchange
Compression method for digital images
file downloads fractal compression becomes more competitive. At common compression ratios, up to about 50:1, fractal compression provides similar results
Fractal_compression
Lossy compression method for reducing the size of digital images
lossless data formats). In April 2024, Google introduced Jpegli, a new JPEG coding library that offers enhanced capabilities and a 35% compression ratio improvement
JPEG
Security vulnerability against HTTPS
and TLS compression combined. BREACH is an instance of the CRIME attack against HTTP compression—the use of gzip or DEFLATE data compression algorithms
BREACH
Form of entropy encoding used in data compression
Arithmetic coding (AC) is a form of entropy coding used in lossless data compression. Normally, a string of characters is represented using a fixed number
Arithmetic_coding
American aircraft engine
compression ratio 7.00:1. Same as E3D but with conical mounts. O-320-A3A 150 hp (112 kW) at 2700 rpm, Minimum fuel grade 80/87 avgas, compression ratio
Lycoming_O-320
File format and file compression program
gzip-compatible files, using an internal DEFLATE implementation with better compression ratios than gzip itself—at the cost of more processor time compared to the
Gzip
File format
2000 but with a focus on speed over compression ratio.[citation needed] PGF can operate at higher compression ratios without taking more encoding/decoding
Progressive_Graphics_File
Image file format with multiple editions
ISBN 978-0-201-60443-6 Pennebaker, William B. and Joan L. Mitchell: JPEG still image data compression standard; 3rd edition, 1993, Springer ISBN 978-0-442-01272-4 Hamilton
JPEG_File_Interchange_Format
IANA. Compression-only formats should often be denoted by the media type of the decompressed data, with a content coding indicating the compression format
List_of_archive_formats
Video compression format, succeeds H.264/MPEG-4 AVC
data compression ratio of up to 1000:1. Depending on the application requirements, HEVC encoders can trade off computational complexity, compression rate
High_Efficiency_Video_Coding
Malicious archive file designed to disrupt the program or system reading it
zip file inside another zip file, it is possible to overcome the compression ratio limit of deflate (1023:1). A famous example of a recursive zip bomb
Zip_bomb
Height/width proportion of an image
35 mm original silent film ratio, today commonly known in TV and video as 1.33:1. Also standard ratio for MPEG-2 video compression. This format is still used
Aspect_ratio_(image)
Process by which soils decrease in volume
proportionality (change in void ratio per order of magnitude change in effective stress) is known as the compression index, given the symbol λ {\displaystyle
Soil_consolidation
Measurement of power meeting specifications
This real time compression algorithm, performed independent of the sampling, prevents data gaps and has a typical 1000:1 compression ratio. A typical function
Electric_power_quality
Means of compressing an executable file
Executable compression is any means of compressing an executable file and combining the compressed data with decompression code into a single executable
Executable_compression
Data compression algorithm
balance between compression ratio and compression speed, without affecting the speed of decompression LZO supports overlapping compression and in-place decompression
Lempel–Ziv–Oberhumer
Computer graphics algorithm
over the space/quality tradeoff inherent in any lossy compression scheme. With ASTC, the ratio between adjacent bit rates is of the order of 25%, making
Adaptive scalable texture compression
Adaptive_scalable_texture_compression
Lossless data compression algorithm
Dynamic Markov compression (DMC) is a lossless data compression algorithm developed by Gordon Cormack and Nigel Horspool. It uses predictive arithmetic
Dynamic_Markov_compression
TV resolution standard
DCT compression significantly reduces the amount of bandwidth required for a digital TV signal. By 1991, it had achieved data compression ratios from
High-definition_television
Relationship between two numbers of the same kind
technological areas where ratio comparisons are important, such as aspect ratios (imaging), compression ratios (engines or data storage), etc. Weisstein
Ratio
Russian software engineer (born 1972)
of data compression and file management. In 1993, Roshal developed the RAR (Roshal Archive) file format, designed to offer higher compression ratios compared
Eugene_Roshal
Mathematical technique used in data compression and analysis
Wavelet compression is a form of data compression well suited for image compression (sometimes also video compression and audio compression). Notable
Wavelet_transform
Lossless data compression software
from 2016 shows that xz has the highest compression ratio among lz4, zstd, zlib, and the slowest compression/decompression. The author of lzip claims
XZ_Utils
Audio cassette format developed by Sony
gigabytes per tape. Due to overhead and variable data compression ratios, the actual amount of data stored could be significantly below a gigabyte. Digital
NT_(cassette)
Magnetic tape storage format
compression ratio) Up to 10.0 GB on one 112 m data cartridge (assuming 2:1 compression ratio) 1994—EXB-8505XL Half-height form factor 500 kB/s data transfer
Data8
Form of lossless data compression
lossless data compression in which runs of data (consecutive occurrences of the same data value) are stored as a single occurrence of that data value and
Run-length_encoding
Data compression improvement algorithm
data compression in DCT-based encoding methods. It is used to optimize residual DCT coefficients after motion estimation in lossy video compression encoders
Trellis_quantization
Reduction in gain due to nonlinearity
Gain compression is a reduction in differential or slope gain caused by nonlinearity of the transfer function of an amplifying device for large-signal
Gain_compression
Data storage technologies that use magnetic tape
vendors claiming 2.6:1 or 3:1. The ratio actually obtained depends on the nature of the data so the compression ratio cannot be relied upon when specifying
Magnetic-tape_data_storage
Texture compression algorithm
image data. All convert a 4×4 block of pixels to a 64-bit or 128-bit quantity, resulting in compression ratios of 6:1 with 24-bit RGB input data or 4:1
S3_Texture_Compression
Disk compression utility
DriveSpace (initially known as DoubleSpace) is a disk compression utility supplied with MS-DOS starting from version 6.0 in 1993 and ending in 2000 with
DriveSpace
American 1940s aircraft engine
Baseline engine model, producing 175 hp (130 kW) at 2300 rpm, with a compression ratio of 6.25:1, a dry weight of 347 lb (157 kg) and fitted with a Marvel
Lycoming_O-435
Open-source software for compressing video games
program includes an option to skip compressing files with a poor data compression ratio, such as files already compressed via another method. CompactGUI
CompactGUI
Digital video coder/decoder
using chroma subsampling to achieve more efficient data compression. It is common to represent the ratios of information stored in these different channels
Video_codec
Data compression technique
Prediction by partial matching (PPM) is an adaptive statistical data compression technique based on context modeling and prediction. PPM models use a set
Prediction by partial matching
Prediction_by_partial_matching
Video compression method for HDMI and DisplayPort links
on 1 August 2014. The DSC standard supports up to a 3∶1 compression ratio (reducing the data stream to 8 bits per pixel) with constant or variable bit
Display_Stream_Compression
Message encoded with more bits than needed
maximum possible data compression ratio, when expressed as the percentage by which a file size can be decreased. (When expressed as a ratio of original file
Redundancy (information theory)
Redundancy_(information_theory)
{\displaystyle b_{u}=k+1} bits. Then relative space saving s (see Data compression ratio) of the encoding can be defined as s = 1 − b e b u = 1 − p k + (
Truncated_binary_encoding
Aircraft engines manufactured by Continental Motors
80/87 avgas, compression ratio 6.0:1. Uses a TCM 639230A3 or 6006 fuel injector. Same as IO-360-A except for reduced compression ratio and rated power
Continental_IO-360
Engine series from Toyota
intake and exhaust camshafts. Very high compression-moderated Atkinson cycle engine. Longer stroke to bore ratio (under-square design). Change of port end
Toyota_Dynamic_Force_engine
File archiver and data compression utility
achieve a very high compression ratio. It has ten levels of compression, from very weak to maximum. However, at higher compression levels, the time required
KGB_Archiver
Techniques for lossy compression of neural networks
The SqueezeNet paper reported that Deep Compression achieved a compression ratio of 35 on AlexNet, and a ratio of ~10 on SqueezeNets. Zhou, Luping (2019)
Model_compression
Loss of qualities between copies
impact on recordings. Signal-to-noise ratio Editing digital images Lossless data compression Data degradation Data loss Model collapse Software rot I Am
Generation_loss
Ratio used in material engineering
ratio of stress to strain under vibratory conditions (calculated from data obtained from either free or forced vibration tests, in shear, compression
Dynamic_modulus
File archiver
rar. The RAR7 file format added support for 64GB compression dictionary and improved compression ratio by adding two extra algorithms. RAR7 archives with
WinRAR
Compression shell command based on the LZW compression algorithm
decompression, and has a significantly lower compression ratio. 1.8 MiB of memory is used to compress the Hutter Prize data, slightly more than gzip at its slowest
Compress_(software)
Capacity of a material or structure to withstand loads tending to reduce size
compressive strength (or compression strength) is the capacity of a material or structure to withstand loads tending to reduce size (compression). It is opposed
Compressive_strength
Israeli computer scientist
universal coding schemes for voice coding. I. Sadeh, "Bounds on Data Compression Ratio with a given Error Probability," Probability in the Engineering
Ilan_Sadeh
Motor vehicle
1/min 62.7 kW (84.1 hp) Max. torque 215 N⋅m (159 lb⋅ft) /1300 1/min 227 N⋅m (167 lb⋅ft) /1600 1/min (no data) Compression ratio 6.7:1 16:1 (no data)
Sisu_KB-124
Reciprocating internal combustion engine
specification has a compression ratio of 8.6:1 and uses a Solex 38 PDSI carburettor. The 1600 ti version has a compression ratio of 9.5:1 and uses twin
BMW_M10
Family of archive file formats used by 7-Zip
is a compressed archive file format that supports several different data compression, encryption and pre-processing algorithms. The 7z format initially
7z
Data compression software
Zopfli is a data compression library that performs deflate, gzip and zlib data encoding. It achieves higher compression ratios than mainstream Deflate
Zopfli
Technique used to encode voices in telephony
quantization step, to allow further reduction of the required data bandwidth for a given signal-to-noise ratio. Typically, the adaptation to signal statistics in
Adaptive differential pulse-code modulation
Adaptive_differential_pulse-code_modulation
File format and file compression program
a single file using the bzip2 file format. libbzip2 is a lossless data compression software library used by the bzip2 program. bzip2 is not a file archiver
Bzip2
Aircraft engine family by Lycoming
engine certified 27 July 1942. 125 hp (93 kW) at 2,450 rpm, 6.25:1 compression ratio, dry weight 244 lb (111 kg) O-290-A Certified 27 July 1942. 125 hp
Lycoming_O-290
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
Female
Slavic
 Short form of Slavic Bogdana, DANA means "gift from God." Compare with other forms of Dana.
Female
Hindi/Indian
(लता) Hindi name derived from a plant name, from the Sanskrit word lata, LATA means "creeper," in reference to a creeping plant.
Female
English
 English surname transferred to unisex forename use, possibly DANA means "from Denmark." Compare with other forms of Dana.
Male
English
English surname transferred to unisex forename use, possibly DANA means "from Denmark."
Female
Polish
 Variant spelling of Polish Dyta, DITA means "rich battle." Compare with another form of Dita.
Female
Finnish
 Short form of Finnish Katariina, KATA means "pure." Compare with other forms of Kata.
Female
Hebrew
(×“Ö¼Ö¸× Ö¸×”) Feminine form of Hebrew Dan, DANA means "judge." Compare with other forms of Dana.
Female
Russian
 Short form of Russian Yekaterina, KATA means "pure." Compare with other forms of Kata.
Girl/Female
American, Anglo, Arabic, Christian, Czechoslovakian, Hawaiian, Hebrew, Irish, Muslim, Swiss
Halo of the Moon; Wisdom; Compassion; Gift; Brave; Daring
Female
English
 Middle English name DARA means "brave, daring." Compare with another form of Dara.
Male
Iranian/Persian
 Short form of Persian Dârayavahush, DARA means "possesses a lot, wealthy." Compare with other forms of Dara.
Female
Hebrew
(דִּיתָה) Pet form of Hebrew Yehuwdiyth, DITA means "Jewess" or "praised." Compare with another form of Dita.
Male
Irish
Irish Gaelic name MAC DARA means "son of oak." This is the name of a patron saint and is still common in Ireland, especially in Connemara.
Female
Finnish
Variant form of Finnish Aada, AATA means "noble."
Male
Hebrew
(דֶּרַע) Hebrew name DARA means "the arm." In the bible, this is the name of a son of Zerah. Compare with other forms of Dara.
Male
Turkish
Turkish name ATA means "ancestor."
Female
Polish
Short form of Polish Edyta, DYTA means "rich battle."
Female
Hungarian
 Short form of Hungarian Katalin, KATA means "pure." Compare with other forms of Kata.
Male
Irish
 From Irish Gaelic Mac Dara, DARA means "son of oak." Compare with other forms of Dara.
Male
Hebrew
Variant spelling of Hebrew Dathan, DATAN means "belonging to a fountain."
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Tamil, Telugu
The Lord of the World Vishnu; Lord of the Earth; Lord of the Universe; Lord Vishnu
Boy/Male
Arabic
Signal; Hint
Boy/Male
Tamil
Archishman | à®…à®°à¯à®šà¯€à®·à¯à®®à®¾à®¨
The Sun
Male
Hungarian
Hungarian form of Greek Nikolaos, MIKLÓS means "victor of the people."Â
Boy/Male
Indian, Kannada, Sanskrit, Telugu
Straight; Clear
Male
English
English form of Latin Dionysius, DENNIS means "follower of Dionysos."
Girl/Female
Indian
Perfection
Boy/Male
Bengali, Hindu, Indian, Kannada, Marathi, Telugu
Lord Krishna
Girl/Female
Hindu, Indian
God Gift
Girl/Female
Australian, Irish
Ireland
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
DATA COMPRESSION-RATIO
n.
A machine for compressing gases; especially, an air compressor.
n.
The pressure of the type on the paper, or the result of such pressure, as regards its appearance; as, a heavy impression; a clear, or a poor, impression; also, a single copy as the result of printing, or the whole edition printed at a given time.
n.
An instrument for compressing an artery (esp., the femoral artery) or other part.
p. pr. & vb. n.
of Date
n.
Prior date; a date antecedent to another which is the actual date.
pl.
of Datum
n.
A sense of heaviness or obstruction in the body or mind; depression; dullness; lassitude; as, an oppression of spirits; an oppression of the lungs.
v. t.
To note or fix the time of, as of an event; to give the date of; as, to date the building of the pyramids.
n.
Oppression.
n. pl.
See Datum.
n.
Compression.
n.
The act of pressing; compression; oppression.
n.
That addition to a writing, inscription, coin, etc., which specifies the time (as day, month, and year) when the writing or inscription was given, or executed, or made; as, the date of a letter, of a will, of a deed, of a coin. etc.
n.
Dent; impression.
v. t.
To note the time of writing or executing; to express in an instrument the time of its execution; as, to date a letter, a bond, a deed, or a charter.
imp. & p. p.
of Date
n.
The fruit of the date palm; also, the date palm itself.
n.
The point of time at which a transaction or event takes place, or is appointed to take place; a given point of time; epoch; as, the date of a battle.
n.
The act of compressing, or state of being compressed.
a.
Compressing, or having power or tendency to compress; as, a compressive force.