Data compression - Wikipedia
https://en.wikipedia.org/wiki/Data_compressionEntropy coding originated in the 1940s with the introduction of Shannon–Fano coding, the basis for Huffman coding which was developed in 1950. Transform coding dates back to the late 1960s, with the introduction of fast Fourier transform (FFT) coding in 1968 and the Hadamard transform in 1969. An important image compression technique is the discrete cosine transform(DCT), a technique d…
Types of Data Compression – SQL-Articles
sql-articles.com › articles › dbaNov 27, 2009 · Lets discuss on each compression type. Row Level Compression. Row level compression is one of the type where there is no compression algorithm is used. The main aim of row level compression is to make fixed data types to a variable data type there by reducing the size. This type of compression will remove any extra bytes in the fixed data type.