| PAPERS | |
| Adaptive Virtual Surround Sound Rendering System for an Arbitrary Listening Position (PDF-708KB) (HI-RES PDF-14.4MB) | |
| Sunmin Kim, Donggeon Kong, and Seongcheol Jang | 243 |
| A smart virtual reality presentation system, using only two loudspeakers, allows for a dynamically selected sweet spot that can be positioned at the arbitrary location of the listener. An efficient asymmetric crosstalk cancellation creates the needed filters to reposition the sweet spot; and a specialized remote control held by the listener allows the system to determine the angle and distance to the listener. Informal listening tests showed that the proposed approach can enhance the surround sound effect for television listening. Compared to conventional playback, listeners preferred this system at every location. | |
| Efficient Audio Equalization Using Multirate Processing (PDF-594KB) (HI-RES PDF-9.8MB) | |
| Riitta Väänänen and Jarmo Hiipakka | 255 |
| The excessive computational burden of some specialized equalization requirements can be reduced by using multirate processing. Quadrature mirror filters split the audio signal into narrow bands that can be downsampled and then filtered with modest processing loads. The composite bands are then upsampled and reconstructed into a full-band signal. The main advantage of this approach is design flexibility since the filters in each band can be implemented independently of each other. | |
| Spectral Impairment of Two-Dimensional Higher Order Ambisonics (PDF-1.2MB) (HI-RES PDF-30.4MB) | |
| Audun Solvang | 267 |
| When reproducing a two-dimensional higher order Ambisonic soundfield with a uniformly distributed loudspeaker array, there is a tradeoff that depends on the radius of the reproduction area, the order, and the wave number. For classical first-order Ambisonics, perfect reconstruction is possible in a tiny sweet spot, and filtering can be used with a larger number of loudspeakers. However, for a larger sweet spot, higher order Ambisonics must be used and the number of loudspeakers must be matched to the order because filter compensation is not possible. The number of loudspeakers is a tradeoff between spectral impairment at high frequencies and reproduction errors at low frequencies. | |
| ENGINEERING REPORTS | |
| Using a Steered-Response Power-Phase Transform to Optimize Speech Pickup in Reverberant Environments (PDF-1.2MB) (HI-RES PDF-6.2MB) | |
| Mingsian R. Bai and Pochang Ho | 280 |
| Using various signal processing technologies, a microphone system has been developed to enhance hands-free communications in automobiles. The steered microphone array functions as a highly directive beamforming spatial filter, thereby emphasizing the location of the selected talker. Experimental results demonstrate that a steered response power-phase transform algorithm is robust in reverberant and noisy environments. | |
| STANDARDS AND INFORMATION DOCUMENTS | |
| AES Standards Committee News (PDF-35KB) | 292 |
| MPEG Surround in AES3; transfer technologies | |
| FEATURES | |
| 33rd Conference Preview, Denver (PDF-468KB) | 294 |
| Calendar (PDF-495KB) | 297 |
| Program (PDF-144KB) | 298 |
| Orchestrating Automotive Audio (PDF-617KB) Francis Rumsey | 303 |
| DEPARTMENTS | |
| News of the Sections (PDF-574KB) | 308 |
| New Products and Developments (PDF-42KB) | 316 |
| Sound Track (PDF-45KB) | 317 |
| Upcoming Meetings (PDF-45KB) | 317 |
| Membership Information (PDF-603KB) | 318 |
| Advertiser Internet Directory (PDF-64KB) | 323 |
| Sections Contacts Directory (PDF-142KB) | 328 |
| AES Conventions and Conferences (PDF-155KB) | 336 |
| EXTRAS | |
| Cover & Sustaining Members List (PDF-62KB) | |
| AES Officers, Committees, Offices & Journal Staff (PDF-62KB) | |
