Last Updated: 20060821, mei
Friday, October 6, 1:30 pm — 3:00 pm
P9-1 A Personalized Preset-Based Audio System for Interactive Service—Taejin Lee, Jae-hyoun Yoo, Yongju Lee, Daeyoung Jang, ETRI (Electronics and Telecommunication Research Institute) - Daejeon, Korea
A conventional audio service provides one mixed audio scene to the user, so user can control the overall volume only. In personalized audio service, however, the user can control properties of audio objects such as loudness, direction, and distance to construct his/her audio scene. But it is not easy to create an audio scene for normal users, so we adopted a preset-based system, which can provide various audio scenes to the user and the user can choose one of them based on his/her preference. The system consists of an authoring tool, streaming server, and a terminal. In this paper we present a design and implementation method of a personalized preset-based audio system and describe the simulation results and applications.
Convention Paper 6904 (Purchase now)
P9-2 Ensemble Hand-Clapping Experiments under the Influence of Delay and Various Acoustic Environments—Snorre Farner, Norwegian University of Science and Technology - Trondheim, Norway, presently at IRCAM, Paris, France; Audun Solvang, Asbjørn Sæbø, U. Peter Svensson, Norwegian University of Science and Technology - Trondheim, Norway
Hand-clapping experiments were performed by pairs of subjects under the influence of a delay up to 68 ms in various acoustic environments. The mean tempo decreased close to linearly as function of the delay. During each sequence the tempo slowed down to a degree that increased with the delay, but for delays shorter than about 15 to 23 ms, the tempo increased during the sequence. For the timing imprecision, and for the subjects’ judgments of their own ensemble performance, no effect of the delay could be observed up to 20 ms. Above 32 ms the effects were observed to increase with the delay. Virtual anechoic conditions lead to a higher imprecision than the reverberant conditions, and real-reverberation conditions lead to a slightly lower tempo.
Convention Paper 6905 (Purchase now)
P9-3 Audio System for Portable Market—Archibald Fitzgerald, Texas Instruments, Inc. - Bangalore, India
This paper describes the audio system software for portable audio players with respect to software and system-on-a-chip (SoC) architecture. The software system for portable devices includes audio playback, radio application, audio record, movie playback, and image viewer applications. In addition, the portable systems can contain gaming and navigation applications. The portable audio players demand low-power and small form-factors differentiated by wide array of audio effects like equalizer, time scale modification (TSM), and cross-fade. System-on-a-chip architecture and capabilities are critical for audio quality, audio features, power efficiency, battery life, form-factor, time to market, and cost.
Convention Paper 6906 (Purchase now)
P9-4 Design and Evaluation of a High Performance Class D Headphone Driver—Anthony Magrath, Wolfson Microelectronics - Edinburgh, Scotland, UK
This paper presents the design and bench evaluation of a class D headphone amplifier and provides compelling arguments as to why it is advantageous to use class D, even for output powers as low as 40 mW. Design tradeoffs are discussed that show how significant savings in power can be achieved at typical listening levels when compared with a conventional class AB amplifier.
Convention Paper 6907 (Purchase now)
