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DIGITAL SPEECH TRANSMISSION AND ENHANCEMENT Enables readers to understand the latest developments in speech enhancement/transmission due to advances in computational power and device miniaturization The Second Edition of Digital Speech Transmission and Enhancement has been updated throughout to provide all the necessary details on the latest advances in the theory and practice in speech signal processing and its applications, including many new research results, standards, algorithms, and developments which have recently appeared and are on their way into state-of-the-art applications. Besides mobile communications, which constituted the main application domain of the first edition, speech enhancement for hearing instruments and man-machine interfaces has gained significantly more prominence in the past decade, and as such receives greater focus in this updated and expanded second edition. Readers can expect to find information and novel methods on: Low-latency spectral analysis-synthesis, single-channel and dual-channel algorithms for noise reduction and dereverberation Multi-microphone processing methods, which are now widely used in applications such as mobile phones, hearing aids, and man-computer interfaces Algorithms for near-end listening enhancement, which provide a significantly increased speech intelligibility for users at the noisy receiving side of their mobile phone Fundamentals of speech signal processing, estimation and machine learning, speech coding, error concealment by soft decoding, and artificial bandwidth extension of speech signals Digital Speech Transmission and Enhancement is a single-source, comprehensive guide to the fundamental issues, algorithms, standards, and trends in speech signal processing and speech communication technology, and as such is an invaluable resource for engineers, researchers, academics, and graduate students in the areas of communications, electrical engineering, and information technology.

Ein kleines Mäuslein rettete sich ausgerechnet in die Klein Wesenberger Kirche. Nun war sie eine Kirchenmaus. Doch in Kirchen findet man nichts Essbares und ist ganz allein. Eines Tages begab sich das Mäuslein deshalb auf die Suche in die Kirche des Nachbardorfes nach einem Gefährten. In dem Büchlein wird geschildert, was sie auf dem Weg dorthin und auf der Suche nach weiteren Gefährten alles erlebt.

Ist das Leben die Summe eigener Entscheidungen oder Schicksal? Über diese Frage kommen der beinamputierte Johann Schwarz und der Autor Anfang der 1960er-Jahre ins Gespräch. Johann Schwarz vertraut ihm an mehreren Abenden seine Lebensgeschichte an: 1937 flieht Johannes, der als Schieferdecker arbeitet, vor seiner Hochzeit aus dem Bergischen Land nach Österreich. Er gibt vor, ein politischer Flüchtling zu sein. Als Hitler wenige Monate später in Österreich einmarschiert, wird es Johannes zu gefährlich. Seine unfreiwillige „Reise“ führt ihn in die Nähe von Sarajevo, wo er drei Jahre lang ein unbeschwertes Leben führt, bis 1941 der Balkankrieg ausbricht. Nun wird Johannes zum jugoslawischen Partisanenkämpfer. Da er aber nicht auf seine deutschen Landsleute schießen will, flieht er nach Griechenland und gerät dort in den Bürgerkrieg. Seine Flucht führt ihn schließlich auf ein Lazarett-Schiff. Hier wird er als deutscher Spion verhaftet und in ein britisches Kriegsgefangenenlager nach Nordafrika gebracht. Über verschiedene Stationen kommt er nach fast 30 Jahren zurück nach Deutschland – und steht vor den Trümmern seines Lebens. Eine lehrreiche, bewegende und vor allem authentische Geschichte!

Speech processing and speech transmission technology are expanding fields of active research. New challenges arise from the'anywhere, anytime'paradigm of mobile communications, the ubiquitous use of voice communication systems in noisy environments and the convergence of communication networks toward Internet based transmission protocols, such as Voice over IP. As a consequence, new speech coding, new enhancement and error concealment, and new quality assessment methods are emerging. Advances in Digital Speech Transmission provides an up-to-date overview of the field, including topics such as speech coding in heterogeneous communication networks, wideband coding, and the quality assessment of wideband speech. Provides an insight into the latest developments in speech processing and speech transmission, making it an essential reference to those working in these fields Offers a balanced overview of technology and applications Discusses topics such as speech coding in heterogeneous communications networks, wideband coding, and the quality assessment of the wideband speech Explains speech signal processing in hearing instruments and man-machine interfaces from applications point of view Covers speech coding for Voice over IP, blind source separation, digital hearing aids and speech processing for automatic speech recognition Advances in Digital Speech Transmission serves as an essential link between the basics and the type of technology and applications (prospective) engineers work on in industry labs and academia. The book will also be of interest to advanced students, researchers, and other professionals who need to brush up their knowledge in this field.

The enormous advances in digital signal processing (DSP) technology have contributed to the wide dissemination and success of speech communication devices - be it GSM and UMTS mobile telephones, digital hearing aids, or human-machine interfaces. Digital speech transmission techniques play an important role in these applications, all the more because high quality speech transmission remains essential in all current and next generation communication networks. Enhancement, coding and error concealment techniques improve the transmitted speech signal at all stages of the transmission chain, from the acoustic front-end to the sound reproduction at the receiver. Advanced speech processing algorithms help to mitigate a number of physical and technological limitations such as background noise, bandwidth restrictions, shortage of radio frequencies, and transmission errors. Digital Speech Transmission provides a single-source, comprehensive guide to the fundamental issues, algorithms, standards, and trends in speech signal processing and speech communication technology. The authors give a solid, accessible overview of • fundamentals of speech signal processing • speech coding, including new speech coders for GSM and UMTS • error concealment by soft decoding • artificial bandwidth extension of speech signals • single and multi-channel noise reduction • acoustic echo cancellation This text is an invaluable resource for engineers, researchers, academics, and graduate students in the areas of communications, electrical engineering, and information technology.