Karlheinz Brandenburg and Mark Kahrs With the advent of multimedia,
digital signal processing (DSP) of sound has emerged from the
shadow of bandwidth limited speech processing. Today, the main
appli cations of audio DSP are high quality audio coding and the
digital generation and manipulation of music signals. They share
common research topics including percep tual measurement techniques
and analysis/synthesis methods. Smaller but nonetheless very
important topics are hearing aids using signal processing
technology and hardware architectures for digital signal processing
of audio. In all these areas the last decade has seen a significant
amount of application oriented research. The topics covered here
coincide with the topics covered in the biannual work shop on
"Applications of Signal Processing to Audio and Acoustics". This
event is sponsored by the IEEE Signal Processing Society (Technical
Committee on Audio and Electroacoustics) and takes place at Mohonk
Mountain House in New Paltz, New York. A short overview of each
chapter will illustrate the wide variety of technical material
presented in the chapters of this book. John Beerends: Perceptual
Measurement Techniques. The advent of perceptual measurement
techniques is a byproduct of the advent of digital coding for both
speech and high quality audio signals. Traditional measurement
schemes are bad estimates for the subjective quality after digital
coding/decoding. Listening tests are subject to sta tistical
uncertainties and the basic question of repeatability in a
different environment.
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