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Advances in Digital Speech Transmission
  • Language: en
  • Pages: 572

Advances in Digital Speech Transmission

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...

Digital Speech Transmission and Enhancement
  • Language: en
  • Pages: 596

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-m...

Single Channel Phase-Aware Signal Processing in Speech Communication
  • Language: en
  • Pages: 253

Single Channel Phase-Aware Signal Processing in Speech Communication

An overview on the challenging new topic of phase-aware signal processing Speech communication technology is a key factor in human-machine interaction, digital hearing aids, mobile telephony, and automatic speech/speaker recognition. With the proliferation of these applications, there is a growing requirement for advanced methodologies that can push the limits of the conventional solutions relying on processing the signal magnitude spectrum. Single-Channel Phase-Aware Signal Processing in Speech Communication provides a comprehensive guide to phase signal processing and reviews the history of phase importance in the literature, basic problems in phase processing, fundamentals of phase estima...

Digital Speech Transmission
  • Language: en
  • Pages: 644

Digital Speech Transmission

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 algori...

Distant Speech Recognition
  • Language: en
  • Pages: 600

Distant Speech Recognition

A complete overview of distant automatic speech recognition The performance of conventional Automatic Speech Recognition (ASR) systems degrades dramatically as soon as the microphone is moved away from the mouth of the speaker. This is due to a broad variety of effects such as background noise, overlapping speech from other speakers, and reverberation. While traditional ASR systems underperform for speech captured with far-field sensors, there are a number of novel techniques within the recognition system as well as techniques developed in other areas of signal processing that can mitigate the deleterious effects of noise and reverberation, as well as separating speech from overlapping speak...

Meet the Akha - help the Akha?
  • Language: de
  • Pages: 300

Meet the Akha - help the Akha?

Die Idee von nachhaltigem Tourismus hat die Entwicklungszusammenarbeit erobert - auch in Laos. Doch wo Nachhaltigkeit, Armutsminderung und Partizipation prognostiziert sind, treten im Alltag komplexe Konflikte zwischen den lokalen Akteuren zu Tage. Hinter den Kulissen eines nachhaltigen Tourismus zeichnen sich Kämpfe um Ressourcen, um die Richtung kulturellen Wandels und ethnische Rivalitäten ab. Die Studie entwirft einen akteursorientierten Ansatz, der diese Konfliktlinien aufspürt und erklärt. Damit wird ein neues Gebiet der Ethnologie - und auch der sozialwissenschaftlichen Tourismusforschung - betreten.

Stochastic optimization methods for supply chains with perishable products
  • Language: en
  • Pages: 123

Stochastic optimization methods for supply chains with perishable products

This book deals with inventory systems in supply chains that face risks that could render products unsalable. These risks include possible cooling system failures, transportation risks, packaging errors, handling errors, or natural quality deterioration over time like spoilage of food or blood products. Classical supply chain inventory models do not regard these risks. This thesis introduces novel cost models that consider these risks. It also analyzes how real-time tracking with RFID sensors and smart containers can contribute to decision making. To solve these cost models, this work presents new solution methods based on dynamic programming. In extensive computational studies both with experimental as well as real-life data from large players in the retailer industry, the solution methods prove to lead to substantially lower costs than existing solution methods and heuristics.

Climate change: Unpacking the burden on food safety
  • Language: en
  • Pages: 176

Climate change: Unpacking the burden on food safety

Climate change is causing unprecedented damage to our ecosystem. Increasing temperatures, ocean warming and acidification, severe droughts, wildfires, altered precipitation patterns, melting glaciers, rising sea levels and amplification of extreme weather events have direct implications for our food systems. While the impacts of such environmental factors on food security are well known, the effects on food safety receive less attention. The purpose of Climate change: Unpacking the burden on food safety is to identify and attempt to quantify some current and anticipated food safety issues that are associated with climate change. The food safety hazards considered in the publication are foodb...

Annales des télécommunications
  • Language: fr
  • Pages: 752

Annales des télécommunications

  • Type: Book
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  • Published: 1994
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  • Publisher: Unknown

description not available right now.

Performance Analysis of Closed Queueing Networks
  • Language: en
  • Pages: 189

Performance Analysis of Closed Queueing Networks

This book deals with the performance analysis of closed queueing networks with general processing times and finite buffer spaces. It offers a detailed introduction to the problem and a comprehensive literature review. Two approaches to the performance of closed queueing networks are presented. One is an approximate decomposition approach, while the second is the first exact approach for finite-capacity networks with general processing times. In this Markov chain approach, queueing networks are analyzed by modeling the entire system as one Markov chain. As this approach is exact, it is well-suited both as a reference quantity for approximate procedures and as extension to other queueing networks. Moreover, for the first time, the exact distribution of the time between processing starts is provided.