By David Salomon
"A excellent treasure chest of data; spanning quite a lot of facts compression equipment, from basic attempt compression the right way to using wavelets in photograph compression. it's strange for a textual content on compression to hide the sector so thoroughly. - ACM Computing Reviews"Salomon's ebook is the main entire and updated reference at the topic. the fashion, rigorous but effortless to learn, makes this ebook the popular selection â?│ [and] the encyclopedic nature of the textual content makes it an compulsory acquisition via our library. - Dr Martin Cohn, Brandeis UniversityData compression is likely one of the most crucial instruments in smooth computing, and there was super development in all components of the sphere. This fourth variation of information Compression presents an all-inclusive, completely up-to-date, and undemanding reference for the numerous differing types and strategies of compression (especially audio compression, a space within which many new subject matters lined during this revised version appear).Among the real beneficial properties of the booklet are an in depth and valuable taxonomy, an in depth description of the most typical tools, and discussions at the use and comparative merits of alternative tools. The book's logical, transparent and full of life presentation is equipped round the major branches of knowledge compression.
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Additional resources for Data Compression: The Complete Reference
The compressor or encoder is the program that compresses the raw data in the input stream and creates an output stream with compressed (low-redundancy) data. The decompressor or decoder converts in the opposite direction. Note that the term encoding is very general and has several meanings, but since we discuss only data compression, we use the name encoder to mean data compressor. The term codec is sometimes used to describe both the encoder and the decoder. ” “Stream” is a more general term because the compressed data may be transmitted directly to the decoder, instead of being written to a ﬁle and saved.
The code uses 5 bits per character but encodes more than 32 characters. Each 5-bit code can be the code of two characters, a letter and a ﬁgure. The “letter shift” and “ﬁgure shift” codes are used to shift between letters and ﬁgures. Using this technique, the Baudot code can represent 32 × 2 − 2 = 62 characters (each code can have two meanings except the LS and FS codes). The actual number of characters, however, is smaller than that, because ﬁve of the codes have one meaning each, and some codes are not assigned.
M. E. Baudot in about 1880 for telegraph communication. It became popular and by 1950 was designated the International Telegraph Code No. 1. It was used in many ﬁrst- and second-generation computers. The code uses 5 bits per character but encodes more than 32 characters. Each 5-bit code can be the code of two characters, a letter and a ﬁgure. The “letter shift” and “ﬁgure shift” codes are used to shift between letters and ﬁgures. Using this technique, the Baudot code can represent 32 × 2 − 2 = 62 characters (each code can have two meanings except the LS and FS codes).
Data Compression: The Complete Reference by David Salomon