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- этимология
Что (кто) такое lossy - определение
DATA COMPRESSION APPROACH THAT RESULTS IN LOSS OR CHANGE OF SOME DATA
Lossy; Lossy encoding; Lossy data compression; Data compression/lossy; List of lossy compression methods; Irreversible compression
Найдено результатов: 307
lossy
¦ adjective
1. having or involving dissipation of electrical or electromagnetic energy.
2. Computing (of data compression) in which unnecessary information is discarded.
lossy
<algorithm> A term describing a data compression algorithm
which actually reduces the amount of information in the data,
rather than just the number of bits used to represent that
information. The lost information is usually removed because
it is subjectively less important to the quality of the data
(usually an image or sound) or because it can be recovered
reasonably by interpolation from the remaining data.
MPEG and JPEG are examples of lossy compression
techniques.
Opposite: lossless.
(1995-03-29)
Lossy compression
In information technology, lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content. These techniques are used to reduce data size for storing, handling, and transmitting content.
Lossy data conversion
A lossy data conversion method is one where converting data between one storage format and another displays data in a form that is "close enough" to be useful, but may differ in some ways from the original. This type of conversion is used frequently between software packages that rely on different storage techniques.
lossy audio compression
![Comparison of [[spectrogram]]s of audio in an uncompressed format and several lossy formats. The lossy spectrograms show [[bandlimiting]] of higher frequencies, a common technique associated with lossy audio compression.](https://commons.wikimedia.org/wiki/Special:FilePath/AudiodatenkompressionManowarThePowerOfThySword.jpg?width=200 "Comparison of [[spectrogram]]s of audio in an uncompressed format and several lossy formats. The lossy spectrograms show [[bandlimiting]] of higher frequencies, a common technique associated with lossy audio compression.")
![[[MP3]], an example of a lossy file format compared to [[WAV]].](https://commons.wikimedia.org/wiki/Special:FilePath/MP3 compression.jpg?width=200 "[[MP3]], an example of a lossy file format compared to [[WAV]].")
![Solidyne 922: The world's first commercial audio bit compression [[sound card]] for PC, 1990](https://commons.wikimedia.org/wiki/Special:FilePath/Placa-audioPC-925.jpg?width=200 "Solidyne 922: The world's first commercial audio bit compression [[sound card]] for PC, 1990")
PROCESS OF ENCODING INFORMATION USING FEWER BITS THAN THE ORIGINAL REPRESENTATION
Multimedia compression; Data compression/multimedia compression; Video compression; Data compression algorithm; Compression algorithm; Uncompression; File compression; Data Compression; Block compression; Spatial compression; Temporal compression; Intelligent Compression; Transparent decompression; Compression algorithms; Datacompression; Source Coding; Bit-rate reduction; File compressing; Digital audio compression; Lossless audio compression; Compression program; Compression utility; Coding techniques; Source coding; Audio data compression; Lossless audio; Perceptual audio coding; Video Compression; Lossless Audio; Negabyte; Sound compression; Audio compression (data); Compression software; Decompression software; Compressed data; Video data compression; Video encoding; Encoding software; Data decompression; Lossy audio compression; Uncompressed; Compressed video; Compressed digital video; Digital video compression; Lossless video compression; Text compression; Genetic compression algorithm; Algorithms for lossless data compression; History of video compression; Perceptual audio coder; Compression techniques; Machine learning and data compression; History of audio compression
loss
WIKIMEDIA DISAMBIGUATION PAGE
Loss (futures); Losses; Games Lost; Loss (disambiguation); Loss (album); Losses (song)
n. 1) the value placed on injury or damages due to an accident caused by another's negligence, a breach of contract or other wrongdoing. The amount of monetary damages can be determined in a lawsuit. 2) when expenses are greater than profits, the difference between the amount of money spent and the income.
See also: damages
loss
WIKIMEDIA DISAMBIGUATION PAGE
Loss (futures); Losses; Games Lost; Loss (disambiguation); Loss (album); Losses (song)
n.
1.
Privation, deprivation, forfeiture.
2.
Forfeiture, failure to win.
3.
Destruction, overthrow, damage, detriment, ruin, defeat, injury, damage, disadvantage.
4.
Waste, squandering.
loss
WIKIMEDIA DISAMBIGUATION PAGE
Loss (futures); Losses; Games Lost; Loss (disambiguation); Loss (album); Losses (song)
(losses)
Frequency: The word is one of the 1500 most common words in English.
1.
Loss is the fact of no longer having something or having less of it than before.
...loss of sight...
The loss of income for the government is about $250 million a month.
...hair loss...
The job losses will reduce the total workforce to 7,000.
N-VAR: usu with supp
2.
Loss of life occurs when people die.
...a terrible loss of human life...
The allies suffered less than 20 casualties while enemy losses were said to be high.
N-VAR: usu with supp
3.
The loss of a relative or friend is their death.
They took the time to talk about the loss of Thomas and how their grief was affecting them.
...the loss of his mother.
N-UNCOUNT: with supp, usu the N of n
4.
If a business makes a loss, it earns less than it spends.
In 1986 Rover made a loss of nine hundred million pounds...
The company said it will stop producing fertilizer in 1990 because of continued losses.
...profit and loss.
? profit
N-VAR
5.
Loss is the feeling of sadness you experience when someone or something you like is taken away from you.
Talk to others about your feelings of loss and grief...
N-UNCOUNT
6.
A loss is the disadvantage you suffer when a valuable and useful person or thing leaves or is taken away.
She said his death was a great loss to herself.
N-COUNT: usu sing
7.
The loss of something such as heat, blood, or fluid is the gradual reduction of it or of its level in a system or in someone's body.
...blood loss.
...weight loss.
...a rapid loss of heat from the body.
N-UNCOUNT: with supp
8.
If a business produces something at a loss, they sell it at a price which is less than it cost them to produce it or buy it. (BUSINESS)
New fashion designs have to be sold off at a loss if sales are poor.
? at a profit
PHRASE: PHR after v
9.
If you say that you are at a loss, you mean that you do not know what to do in a particular situation.
The government is at a loss to know how to tackle the violence.
PHRASE: usu v-link PHR, usu PHR for n, PHR to-inf
10.
If you cut your losses, you stop doing what you were doing in order to prevent the bad situation that you are in becoming worse.
Directors are right to cut their losses, admit they chose the wrong man and make a change.
PHRASE: V inflects
11.
If you say that someone or something is a dead loss, you have a low opinion of them because you think they are completely useless or unsuccessful. (BRIT INFORMAL)
I'd had no experience of organizing anything of that sort. I think I was largely a dead loss.
PHRASE: usu v-link PHR [disapproval]
Lossless
DATA COMPRESSION APPROACH ALLOWING PERFECT RECONSTRUCTION OF THE ORIGINAL DATA
Data compression/lossless; Lossless; Lossless encoding; Lossless encoder; Lossless codec; Losslessly; Loseless; Magic compression algorithm; Maximum Compression Benchmark; Calgary Challenge; Lossless compression benchmarks; Lossless data compression; Lossless format; Reversible compression; General purpose lossless compression methods; Lossless 3D compression; 🆩; Generic Compression Benchmark; Lossless Video Compression; List of lossless compression methods; Benchmarks for lossless compression
·adj Free from loss.
lossless
DATA COMPRESSION APPROACH ALLOWING PERFECT RECONSTRUCTION OF THE ORIGINAL DATA
Data compression/lossless; Lossless; Lossless encoding; Lossless encoder; Lossless codec; Losslessly; Loseless; Magic compression algorithm; Maximum Compression Benchmark; Calgary Challenge; Lossless compression benchmarks; Lossless data compression; Lossless format; Reversible compression; General purpose lossless compression methods; Lossless 3D compression; 🆩; Generic Compression Benchmark; Lossless Video Compression; List of lossless compression methods; Benchmarks for lossless compression
¦ adjective
1. without dissipation of electrical or electromagnetic energy.
2. Computing (of data compression) without loss of information.
Википедия
Lossy compression
In information technology, lossy compression or irreversible compression is the class of data compression methods that uses inexact approximations and partial data discarding to represent the content. These techniques are used to reduce data size for storing, handling, and transmitting content. The different versions of the photo of the cat on this page show how higher degrees of approximation create coarser images as more details are removed. This is opposed to lossless data compression (reversible data compression) which does not degrade the data. The amount of data reduction possible using lossy compression is much higher than using lossless techniques.
Well-designed lossy compression technology often reduces file sizes significantly before degradation is noticed by the end-user. Even when noticeable by the user, further data reduction may be desirable (e.g., for real-time communication or to reduce transmission times or storage needs). The most widely used lossy compression algorithm is the discrete cosine transform (DCT), first published by Nasir Ahmed, T. Natarajan and K. R. Rao in 1974.
Lossy compression is most commonly used to compress multimedia data (audio, video, and images), especially in applications such as streaming media and internet telephony. By contrast, lossless compression is typically required for text and data files, such as bank records and text articles. It can be advantageous to make a master lossless file which can then be used to produce additional copies from. This allows one to avoid basing new compressed copies off of a lossy source file, which would yield additional artifacts and further unnecessary information loss.
