TAILIEUCHUNG - Báo cáo hóa học: " Gianpaolo Evangelista Department of Physical Sciences, University “Federico II”"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: "Gianpaolo Evangelista Department of Physical Sciences, University “Federico II” | EURASIP Journal onApplied Signal Processing 2003 10 939-940 2003 Hindawi Publishing Corporation Editorial Gianpaolo Evangelista Department of Physical Sciences University Federico II of Naples I-80126 Napoli Italy Email gianpaolo. evangelista@ Mark Kahrs Department of Electrical Engineering University of Pittsburgh Pittsburgh PA 15261 USA Email kahrs@ Emmanuel Bacry Centre de Mathematiques Appliquees Ecole Polytechnique F-91128 Palaiseau Cedex France Em ail bacry@ Interest in digital processing of audio signals has been reinvigorated by the introduction of multimedia communication via the Internet and digital audio broadcasting systems. These new applications demand high bandwidth and require innovative solutions to an old problem how to achieve high quality at low bit rates. Often this problem is addressed by transmission schemes in which only part of the original audio data is transmitted. Other sources voices or channels. The output must be reconstructed at the receiver from purely synthetic or incomplete data. Additionally the global networked audio community must solve a new class of problems concerning protection of audio streams and documents. Accordingly robust methods are sought for enforcing security privacy ownership and authentication of audio data. Furthermore the maintenance of audio archives our cultural heritage requires the development of efficient techniques for the restoration of corrupted audio documents. This special issue provides a sample of the new directions of digital audio research. In audio synthesis real-time computation of physical models of acoustic instruments is now possible due to the steady progress of Moore s law. In the paper by B. Bank et al. a review of piano synthesis is given. The synthesis is described in terms of structured audio and the structured audio orchestral language SAOL which is included in MPEG-4. Through the use of filtering and interpolation P. A. A. Es-quef et al. .

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