| PAPERS | |
| Perceptual Evaluation of Speech Quality (PESQ): The New ITU Standard for End-to-End Speech Quality Assessment Part I-Time-Delay Compensation (PDF-133K) | |
| Antony W. Rix, Michael P. Hollier, Andries P. Hekstra, and John G. Beerends | 755 |
| Creating a model for the subjective speech quality in modern telephone networks, which includes voice-over Internet, presents special problems because of time-varying delay during transmission. Including delay compensation in the evaluation algorithm is required in order to match subjective judgments. The paper explores the numerous origins of variable delay and its perceptual influence on subjective quality. Delay can only be considered to be constant over relatively short intervals. | |
| Perceptual Evaluation of Speech Quality (PESQ): The New ITU Standard for End-to-End Speech Quality Assessment Part II-Psychoacoustic Model (PDF-135K) | |
| John G. Beerends, Andries P. Hekstra, Antony W. Rix, and Michael P. Hollier | 765 |
| Using delay compensation, as described in Part I above, the authors present a full psychoacoustic model for the perceptual evaluation of speech quality in telephone systems to predict the end-to-end judgment of subjective degradation. The final quality score is a combination of many independent measures. Although extensive empirical testing of the cognitive model showed that it provided a much better measure of degradation than previous approaches, additional factors are yet to be included in the model. | |
| Improved Microphone Array Configurations for Auralization of Sound Fields by Wave-Field Synthesis (PDF-395K) | |
| Edo Hulsebos, Diemer de Vries, and Emmanuelle Bourdillat | 779 |
| In order to provide accurate auralization when reproducing an acoustic field in a large space, significant amounts of impulse response data are required. The paper investigates and compares three classes of microphone array configurations: linear, cross, and circular. The proposed circular configuration, the basis for wave-field synthesis, provides better spatial reconstruction over a wider area because it avoids diffraction effects present at the end points in the other configurations. | |
| Crossover Systems in Digital Loudspeakers (PDF-221K) | |
| S. C. Busbridge, Y. Huang, and P. A. Fryer | 791 |
| Implementing a crossover network for a digital loudspeaker allows the individual binary currents to be filtered into two spectral channels because the operations of digital-to-analog conversion and filtering can be interchanged. The paper explores a mathematical simulation of a proposed digital loudspeaker using a separate voice coil for each bit. Actual measurements from an experimental system are then used to support the results. | |
| STANDARDS AND INFORMATION DOCUMENTS | |
| AES Standards Committee News (PDF-25K) | 799 |
| Digital interfacing; digital libraries; loudspeaker modeling and measurement; high-performance serial bus | |
| FEATURES | |
| 22nd Conference Report, Espoo (PDF-2.8MB) | 804 |
| New Officers 2002/2003 (PDF-140K) | 814 |
| Review of Society's Sustaining Members (PDF-3.4MB) | 816 |
| Education News (PDF-67K) | 838 |
| 24th Conference, Banff, Call for Contributions (PDF-21K) | 851 |
| DEPARTMENTS | |
| News of the Sections (PDF-146K) | 839 |
| Sound Track (PDF-12K) | 844 |
| Upcoming Meetings (PDF-12K) | 844 |
| New Products and Developments (PDF-72K) | 845 |
| Available Literature (PDF-12K) | 847 |
| Membership Information (PDF-47K) | 848 |
| Advertiser Internet Directory (PDF-47K) | 849 |
| In Memoriam (PDF-109K) | 850 |
| AES Special Publications (PDF-87K) | 853 |
| Sections Contacts Directory (PDF-33K) | 858 |
| AES Conventions and Conferences (PDF-38K) | 864 |
| EXTRAS | |
| Cover & Sustaining Members List (PDF-32K) | |
| VIP List & Editorial Staff (PDF-26K) | |
| Ads In This Issue (HTML) | |
| Download Entire Journal As One PDF (PDF-6.1MB) | |
