Tom Bäckström is Professor for Speech Coding at University of Erlangen-Nuremberg and Member of the International Audio Labs Erlangen, funded by Fraunhofer IIS. He is active as a researcher in mathematical methods in the modeling of the voice and audio. His interests are in developing the mathematical side even more in the intersection of digital signal processing, matrix and polynomial algebra and functional analysis.

This book provides scientific understanding of the most central techniques used in speech coding both for advanced students as well as professionals with a background in speech audio and or digital signal processing. It provides a clear connection between the whys hows and whats thus enabling a clear view of the necessity purpose and solutions provided by various tools as well as their strengths and weaknesses in each respect Equivalently this book sheds light on the following perspectives for each technology presented Objective What do we want to achieve and especially why is this goal important Resource Information What information is available and how can it be useful and Resource Platform What kind of platforms are we working with and what are their capabilities restrictions This includes computational memory and acoustic properties and the transmission capacity of devices used. The book goes on to address Solutions Which solutions have been proposed and how can they be used to reach the stated goals and Strengths and weaknesses In which ways do the solutions fulfill the objectives and where are they insufficient Are resources used efficiently.

This book concentrates solely on code excited linear prediction and its derivatives since mainstream speech codecs are based on linear prediction It also concentrates exclusively on time domain techniques

because frequency domain tools are to a large extent common with audio codecs

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