標題: Comparative study of audio spatializers for dual-loudspeaker mobile phones
作者: Bai, Mingsian R.
Shih, Geng-Yu
Lee, Chih-Chung
機械工程學系
Department of Mechanical Engineering
公開日期: 1-一月-2007
摘要: MPEG-1, layer 3 handsets equipped with dual loudspeakers and three-dimensional audio modules have received much attention in the market of consumer electronics. To create spatial impression during audio reproduction, the head-related transfer function (HRTF) and the crosstalk cancellation system (CCS) are key elements in many audio spatializers. However, there are many factors that one should take into account during the design and implementation stages of an audio spatializer in the handset application. In the paper, a comprehensive study was undertaken to compare various audio spatializers for use with dual- loudspeaker handsets, in the context of inverse filtering strategies. Two deconvolution approaches, the frequency-domain method and the time-domain method, are employed to design the required inverse filters. Different approaches to design audio spatializers with the HRTF, CCS, and their combination are compared. In particular, two modified CCS approaches are suggested. Issues in the implementation phase such as regularization, complex smoothing, and structures of inverse filters are also addressed in the paper. Comprehensive objective and subjective tests were conducted to investigate the aforementioned aspects of audio spatializers. The data obtained from the subjective tests are processed by using the multianalysis of variance to justify statistical significance of the results. (c) 2007 Acoustical Society of America.
URI: http://dx.doi.org/10.1121/1.2387121
http://hdl.handle.net/11536/11348
ISSN: 0001-4966
DOI: 10.1121/1.2387121
期刊: JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume: 121
Issue: 1
起始頁: 298
結束頁: 309
顯示於類別:期刊論文


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