2,682 research outputs found
Psychoacoustic Considerations in Surround Sound with Height
This paper presents recent research findings in the psychoacoustics of 3D multichannel sound recording and
rendering. The addition of height channels in new reproduction formats such as Auro-3D, Dolby Atmos and 22.2,
etc. enhances the perceived spatial impression in reproduction. To achieve optimal acoustic recording and signal
processing for such formats, it is first important to understand the fundamental principles of how we perceive sounds
reproduced from vertically oriented stereophonic loudspeakers. Recent studies by the authors in this field provide
insights into how such principles can be applied for practical 3D recording and upmixing. Topics that are discussed
in this paper include the interchannel level and time difference relationships in terms of vertically induced
interchannel crosstalk, the effectiveness of the precedence effect in the vertical plane, the aspect of tonal coloration
resulting from vertical stereophonic reproduction, the effect of vertical microphone spacing on envelopment, the
effect of interchannel decorrelation, and the use of spectral cues for extending vertical image spread
Systematic evaluation of perceived spatial quality
The evaluation of perceived spatial quality calls for a method that is sensitive to changes in the constituent dimensions of that quality. In order to devise a method accounting for these changes, several processes have to be performed. This paper shows the development of scales by elicitation and structuring of verbal data, followed by validation of the resulting attribute scales
Localization and Rendering of Sound Sources in Acoustic Fields
DisertaÄnĂ prĂĄce se zabĂœvĂĄ lokalizacĂ zdrojĆŻ zvuku a akustickĂœm zoomem. HlavnĂm cĂlem tĂ©to prĂĄce je navrhnout systĂ©m s akustickĂœm zoomem, kterĂœ pĆiblĂĆŸĂ zvuk jednoho mluvÄĂho mezi skupinou mluvÄĂch, a to i kdyĆŸ mluvĂ souÄasnÄ. Tento systĂ©m je kompatibilnĂ s technikou prostorovĂ©ho zvuku. HlavnĂ pĆĂnosy disertaÄnĂ prĂĄce jsou nĂĄsledujĂcĂ: 1. NĂĄvrh metody pro odhad vĂce smÄrĆŻ pĆichĂĄzejĂcĂho zvuku. 2. NĂĄvrh metody pro akustickĂ© zoomovĂĄnĂ pomocĂ DirAC. 3. NĂĄvrh kombinovanĂ©ho systĂ©mu pomocĂ pĆedchozĂch krokĆŻ, kterĂœ mĆŻĆŸe bĂœt pouĆŸit v telekonferencĂch.This doctoral thesis deals with sound source localization and acoustic zooming. The primary goal of this dissertation is to design an acoustic zooming system, which can zoom the sound of one speaker among multiple speakers even when they speak simultaneously. The system is compatible with surround sound techniques. In particular, the main contributions of the doctoral thesis are as follows: 1. Design of a method for multiple sound directions estimations. 2. Proposing a method for acoustic zooming using DirAC. 3. Design a combined system using the previous mentioned steps, which can be used in teleconferencing.
3D audio as an information-environment: manipulating perceptual significance for differntiation and pre-selection
Contemporary use of sound as artificial information display is rudimentary, with little 'depth of significance' to facilitate users' selective attention. We believe that this is due to conceptual neglect of 'context' or perceptual background information. This paper describes a systematic approach to developing 3D audio information environments that utilise known cognitive characteristics, in order to promote rapidity and ease of use. The key concepts are perceptual space, perceptual significance, ambience labelling information and cartoonification
Reviews on Technology and Standard of Spatial Audio Coding
Market  demands  on a more impressive entertainment media have motivated for delivery of three dimensional  (3D) audio content to  home consumers  through Ultra  High  Definition  TV  (UHDTV), the next generation of TV broadcasting, where spatial  audio  coding plays  fundamental role. This paper reviews fundamental concept on spatial audio coding which includes technology, standard, and application. Basic principle of object-based audio reproduction system  will also be elaborated, compared  to  the  traditional channel-based system, to provide good understanding on this popular interactive audio reproduction system which gives end users flexibility to render  their  own preferred  audio composition.Keywords : spatial audio, audio coding, multi-channel audio signals, MPEG standard, object-based audi
From surround to true 3-D
To progress from surround sound to true 3-D requires an updating of the psychoacoustical theories which underlie current technologies. This paper shows how J.J.Gibsonâs ecological approach to perception can be applied to audio perception and used to derive 3-D audio technologies based on intelligent pattern recognition and active hypothesis testing. These technologies are suggested as methods which can be used to generate audio environments that are believable and can be explored
Surround by Sound: A Review of Spatial Audio Recording and Reproduction
In this article, a systematic overview of various recording and reproduction techniques for spatial audio is presented. While binaural recording and rendering is designed to resemble the human two-ear auditory system and reproduce sounds specifically for a listenerâs two ears, soundfield recording and reproduction using a large number of microphones and loudspeakers replicate an acoustic scene within a region. These two fundamentally different types of techniques are discussed in the paper. A recent popular area, multi-zone reproduction, is also briefly reviewed in the paper. The paper is concluded with a discussion of the current state of the field and open problemsThe authors acknowledge National Natural Science Foundation of China (NSFC) No.
61671380 and Australian Research Council Discovery Scheme DE 150100363
- âŠ