Data compression explained matt mahoney

The compress() function takes a byte c and compresses it one bit at a time starting with the most significant bit. At each of the 8 steps, the previously coded  BenchmarksCodingModelingTransforms

Information Theory

Data compression is the art of reducing the number of bits needed to store or transmitdata. Compression can be either lossless or lossy

Benchmarks

A data compression benchmark measures compression ratio over a data set, and sometimesmemory usage and speed on a particular computer

Coding

A code is an assignment of bit strings to symbols such that the strings can be decodedunambiguously to recover the original data

Modeling

A model is an estimate of the probability distribution of inputs to a compressor

Transforms

A transform converts data into a sequence of symbols which can be compressed witha simpler or faster model, or one using less memory

What is an example of a losslessly compressed data?

Losslessly compressed data canbe decompressed to exactly its original value

An example is 1848 Morse Code

Each letter of the alphabet is coded as a sequence of dots anddashes

The most common letters in English like E and T receive the shortest codes

The least common like J, Q, X, and Z are assigned the longest codes

What is data compression?

Data compression is the art of reducing the number of bits needed to store or transmitdata

Compression can be either lossless or lossy

Losslessly compressed data canbe decompressed to exactly its original value

An example is 1848 Morse Code

Each letter of the alphabet is coded as a sequence of dots anddashes

Why is lossy compression an AI problem?

Lossy compression consists of a transform to separate important from unimportantdata, followed by lossless compression of the important part and discarding therest

The transform is an AI problem because it requires understanding what thehuman brain can and cannot perceive


Categories

Data compression encoding
Data compression exercises
Data compression error
Data compression encryption order
Data compression example in hindi
Compression data elasticsearch
Compression data equation
Data compression formats
Data compression for quantum machine learning
Data compression for backbone network github
Data compression formula
Data compression free
Data compression for machine learning
Data compression facts
Data compression future
Data compression forum
Data compression file formats
Data compression file extension
Data compression for video
Data compression feature