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Wideband audio

Peter Noll
Technische Universitaet Berlin

The lecture will cover key technologies including auditory masking, perceptual coding, frequency domain coding, and dynamic bit allocation. We shall then focus on the MPEG standardization work, which provides international standards for a wide range of communications-based and storage-based applications. The European digital audio broadcast (DAB) makes use of MPEG-1. Its subjective quality and its error robustness will be demonstrated by audio examples. It will then be shown that the MPEG-2 Advanced Audio Coding (AAC) standard offers a collection of very flexible tools for stereo and multichannel coding, and that AAC outperforms many other coding algorithms (including MPEG-1 coders).
Finally, we will address the current MPEG-4 speech and audio coding activities which will merge the whole range of audio from high fidelity audio coding and speech coding down to synthetic audio, synthetic speech and text-to-speech conversion.
The lecture will be supported by a number of audio demonstrations.

Peter Noll is Professor of Telecommunications at the Technical University of Berlin. He is currently Executive Director of the Institute of Telecommunications and Theoretical Electrical Engineering.
Dr. Noll`s primary research interests are in the fields of digital coding and transmission of speech, audio, and video signals, in source and channel modelling, and in communication theory. He has authored or coauthored over one hundred journal papers and technical reports, and is coauthor of the book "Digital Coding of Waveforms: Principles and Applications to Speech and Video" (Prentice-Hall, USA).
Since 1988 he has been a member of the ISO/IEC Moving Pictures Experts Group (MPEG) and has acted as chairmanof its Subgroup on Audio from 1991 to 1995. The activity of this subgroup has led to standards for stereophonic (MPEG-1) and multichannel (MPEG-2) audio coding.
Peter Noll was a recipient of the 1976 NTG/VDE Award of the Communication Engineering Society of Germany and a co-recipient of the 1977 Senior Award of the IEEE Acoustics, Speech, and Signal Processing Society, USA for a paper that introduced adaptive transform coding of speech signals. 1982 he was elected to the Grade of an IEEE Fellow "for contributions to adaptive quantization and coding of speech signals". In 1994 he became Advisory Professor of the Beijing Institute of Technology, Beijing (China). He is a 1998 Distinguished Lecturer of the IEEE Signal Processing Society.
Since 1996 he has been a Member of the Berlin-Brandenburgische Akademie der Wissenschaften and a Member of the Akademie der Naturforscher Leopoldina.

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