Digital Communication: Communication, Multimedia, Security - download pdf or read online

By Christoph Meinel, Harald Sack

ISBN-10: 3642543308

ISBN-13: 9783642543302

The authors supply a close precis in regards to the basics and the ancient historical past of electronic communique. This contains an outline of the encoding ideas and algorithms of textual info, audio details, in addition to photos, photographs, and video within the web. in addition the basics of laptop networking, electronic protection and cryptography are coated. therefore, the ebook offers a well-founded entry to communique expertise of desktop networks, the net and the WWW. various images and pictures, a subject-index and a close checklist of historic personalities together with a thesaurus for every bankruptcy raise the sensible good thing about this ebook that's like minded in addition to for undergraduate scholars as for operating practitioners.

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3) [37]. Fig. 3 Sumerian cuneiform cylinder with an inscription of King Nabonidus from Ur, 555 – 539 BC. Around 2700 BC, the Akkadians penetrated the territory of the Sumerians, subsequently adopting the word and syllabic writing into their own semitic language. The wedge-shaped characters grouped vertically, horizontally and diagonally resulted in a new script. 1 The Development of Writing 23 came the writing for traffic in the entire ancient Orient. Just as quickly, the functional spectrum of writing developed.

Besides acoustic telecommunications, for example in the form of relay chains of oral messengers such as in ancient Greece and Persia, drum telegraphy was also used. It remains today a form of communication among indigenous peoples. Having originated foremost in Africa, drum languages soon became widespread. The transmitted message is based on the rhythm and pitch of natural language syllables and “copied“ in drum beats. There is evidence of well-organized relay messengers as early as the fifth century BC in the Persian Empire and later also in the Roman Empire.

In the Roman empire, knowledge of the hieroglyphics was lost. First Fig. 4 Ancient Egyptian hieroglyphic writing. with the discovery of the famous Rosetta Stone (1799) in Egypt by Napoleon Bonaparte’s (1769–1821) expeditionary forces did it became possible for the 24 2 Historical Overview French Egyptologist, Jean Francois Champolion (1790–1832) to decipher the hieroglyphics in 1822. It was mainly the Greek alphabet, whose original form dates back to the Phoenicians, that decisively shaped our western intellectual culture.

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Digital Communication: Communication, Multimedia, Security by Christoph Meinel, Harald Sack


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