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Letteratura scientifica selezionata sul tema "Ambisonic"

Autore: Grafiati

Pubblicato: 10 dicembre 2022

Ultima modifica: 10 marzo 2023

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Articoli di riviste sul tema "Ambisonic"

McKenzie, Thomas, Damian Murphy e Gavin Kearney. "Diffuse-Field Equalisation of Binaural Ambisonic Rendering". Applied Sciences 8, n. 10 (17 ottobre 2018): 1956. http://dx.doi.org/10.3390/app8101956.

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Ambisonics has enjoyed a recent resurgence in popularity due to virtual reality applications. Low order Ambisonic reproduction is inherently inaccurate at high frequencies, which causes poor timbre and height localisation. Diffuse-Field Equalisation (DFE), the theory of removing direction-independent frequency response, is applied to binaural (over headphones) Ambisonic rendering to address high-frequency reproduction. DFE of Ambisonics is evaluated by comparing binaural Ambisonic rendering to direct convolution via head-related impulse responses (HRIRs) in three ways: spectral difference, predicted sagittal plane localisation and perceptual listening tests on timbre. Results show DFE successfully improves frequency reproduction of binaural Ambisonic rendering for the majority of sound source locations, as well as the limitations of the technique, and set the basis for further research in the field.

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McKenzie, Thomas, Damian Murphy e Gavin Kearney. "Interaural Level Difference Optimization of Binaural Ambisonic Rendering". Applied Sciences 9, n. 6 (23 marzo 2019): 1226. http://dx.doi.org/10.3390/app9061226.

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Ambisonics is a spatial audio technique appropriate for dynamic binaural rendering due to its sound field rotation and transformation capabilities, which has made it popular for virtual reality applications. An issue with low-order Ambisonics is that interaural level differences (ILDs) are often reproduced with lower values when compared to head-related impulse responses (HRIRs), which reduces lateralization and spaciousness. This paper introduces a method of Ambisonic ILD Optimization (AIO), a pre-processing technique to bring the ILDs produced by virtual loudspeaker binaural Ambisonic rendering closer to those of HRIRs. AIO is evaluated objectively for Ambisonic orders up to fifth order versus a reference dataset of HRIRs for all locations on the sphere via estimated ILD and spectral difference, and perceptually through listening tests using both simple and complex scenes. Results conclude AIO produces an overall improvement for all tested orders of Ambisonics, though the benefits are greatest at first and second order.

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Rudzki, Tomasz, Ignacio Gomez-Lanzaco, Jessica Stubbs, Jan Skoglund, Damian T. Murphy e Gavin Kearney. "Auditory Localization in Low-Bitrate Compressed Ambisonic Scenes". Applied Sciences 9, n. 13 (28 giugno 2019): 2618. http://dx.doi.org/10.3390/app9132618.

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The increasing popularity of Ambisonics as a spatial audio format for streaming services poses new challenges to existing audio coding techniques. Immersive audio delivered to mobile devices requires an efficient bitrate compression that does not affect the spatial quality of the content. Good localizability of virtual sound sources is one of the key elements that must be preserved. This study was conducted to investigate the localization precision of virtual sound source presentations within Ambisonic scenes encoded with Opus low-bitrate compression at different bitrates and Ambisonic orders (1st, 3rd, and 5th). The test stimuli were reproduced over a 50-channel spherical loudspeaker configuration and binaurally using individually measured and generic Head-Related Transfer Functions (HRTFs). Participants were asked to adjust the position of a virtual acoustic pointer to match the position of virtual sound source within the bitrate-compressed Ambisonic scene. Results show that auditory localization in low-bitrate compressed Ambisonic scenes is not significantly affected by codec parameters. The key factors influencing localization are the rendering method and Ambisonic order truncation. This suggests that efficient perceptual coding might be successfully used for mobile spatial audio delivery.

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Li, Guoteng, Chengshi Zheng, Yuxuan Ke e Xiaodong Li. "Deep Learning-Based Acoustic Echo Cancellation for Surround Sound Systems". Applied Sciences 13, n. 3 (17 gennaio 2023): 1266. http://dx.doi.org/10.3390/app13031266.

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Surround sound systems that play back multi-channel audio signals through multiple loudspeakers can improve augmented reality, which has been widely used in many multimedia communication systems. It is common that a hand-free speech communication system suffers from the acoustic echo problem, and the echo needs to be canceled or suppressed completely. This paper proposes a deep learning-based acoustic echo cancellation (AEC) method to recover the desired near-end speech from the microphone signals in surround sound systems. The ambisonics technique was adopted to record the surround sound for reproduction. To achieve a better generalization capability against different loudspeaker layouts, the compressed complex spectra of the first-order ambisonic signals (B-format) were sent to the neural network as the input features directly instead of using the ambisonic decoded signals (D-format). Experimental results on both simulated and real acoustic environments showed the effectiveness of the proposed algorithm in surround AEC, and outperformed other competing methods in terms of the speech quality and the amount of echo reduction.

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Zaunschirm, Markus, Matthias Frank e Franz Zotter. "Binaural Rendering with Measured Room Responses: First-Order Ambisonic Microphone vs. Dummy Head". Applied Sciences 10, n. 5 (29 febbraio 2020): 1631. http://dx.doi.org/10.3390/app10051631.

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To improve the limited degree of immersion of static binaural rendering for headphones, an increased measurement effort to obtain multiple-orientation binaural room impulse responses (MOBRIRs) is reasonable and enables dynamic variable-orientation rendering. We investigate the perceptual characteristics of dynamic rendering from MOBRIRs and test for the required angular resolution. Our first listening experiment shows that a resolution between 15 ∘ and 30 ∘ is sufficient to accomplish binaural rendering of high quality, regarding timbre, spatial mapping, and continuity. A more versatile alternative considers the separation of the room-dependent (RIR) from the listener-dependent head-related (HRIR) parts, and an efficient implementation thereof involves the measurement of a first-order Ambisonic RIR (ARIR) with a tetrahedral microphone. A resolution-enhanced ARIR can be obtained by an Ambisonic spatial decomposition method (ASDM) utilizing instantaneous direction of arrival estimation. ASDM permits dynamic rendering in higher-order Ambisonics, with the flexibility to render either using dummy-head or individualized HRIRs. Our comparative second listening experiment shows that 5th-order ASDM outperforms the MOBRIR rendering with resolutions coarser than 30 ∘ for all tested perceptual aspects. Both listening experiments are based on BRIRs and ARIRs measured in a studio environment.

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Hui, C. T. Justine, Yusuke Hioka, Catherine I. Watson e Hinako Masuda. "Spatial release from masking in varying spatial acoustic under higher order ambisonic-based sound reproduction system". INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, n. 4 (1 agosto 2021): 2476–85. http://dx.doi.org/10.3397/in-2021-2148.

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A previous study found that spatial release from masking (SRM) could be observed under virtual reverberant environments using a first order Ambisonic-based sound reproduction system, however, poor localisation accuracy made it difficult to examine effect of varying reverberation time on SRM. The present study follows on using higher order Ambisonics (HOA) to examine how benefits from SRM vary in different spatial acoustics. Subjective speech intelligibility was measured where four room acoustics:reverberation time (RT)= 0.7 s (clarity (C50)= 16 dB, 7 dB); RT= 1.8 s (C50= 8 dB, 2 dB) were simulated via a third order Ambisonic system with a 16 channel spherical loudspeaker array. The masker was played from 8 azimuthal angles (0, +-45, +-90, +-135, 180 degrees) while the target speech was played from 0 degree. The listeners are deemed to benefit from SRM if their intelligibility scores were higher when the masker comes from a different angle than that of the target. We found while listeners could benefit from SRM at C50 = 16 dB and 8 dB, the benefit starts to diminish at C50 = 7 dB, and listeners could no longer benefit from SRM at C50 = 2 dB.

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Zotter, F., H. Pomberger e M. Noisternig. "Energy-Preserving Ambisonic Decoding". Acta Acustica united with Acustica 98, n. 1 (1 gennaio 2012): 37–47. http://dx.doi.org/10.3813/aaa.918490.

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Epain, N., C. T. Jin e F. Zotter. "Ambisonic Decoding With Constant Angular Spread". Acta Acustica united with Acustica 100, n. 5 (1 settembre 2014): 928–36. http://dx.doi.org/10.3813/aaa.918772.

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Menzies, Dylan, e Filippo Maria Fazi. "Ambisonic Decoding for Compensated Amplitude Panning". IEEE Signal Processing Letters 26, n. 3 (marzo 2019): 470–74. http://dx.doi.org/10.1109/lsp.2019.2895275.

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Narbutt, Miroslaw, Jan Skoglund, Andrew Allen, Michael Chinen, Dan Barry e Andrew Hines. "AMBIQUAL: Towards a Quality Metric for Headphone Rendered Compressed Ambisonic Spatial Audio". Applied Sciences 10, n. 9 (3 maggio 2020): 3188. http://dx.doi.org/10.3390/app10093188.

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Spatial audio is essential for creating a sense of immersion in virtual environments. Efficient encoding methods are required to deliver spatial audio over networks without compromising Quality of Service (QoS). Streaming service providers such as YouTube typically transcode content into various bit rates and need a perceptually relevant audio quality metric to monitor users’ perceived quality and spatial localization accuracy. The aim of the paper is two-fold. First, it is to investigate the effect of Opus codec compression on the quality of spatial audio as perceived by listeners using subjective listening tests. Secondly, it is to introduce AMBIQUAL, a full reference objective metric for spatial audio quality, which derives both listening quality and localization accuracy metrics directly from the B-format Ambisonic audio. We compare AMBIQUAL quality predictions with subjective quality assessments across a variety of audio samples which have been compressed using the Opus 1.2 codec at various bit rates. Listening quality and localization accuracy of first and third-order Ambisonics were evaluated. Several fixed and dynamic audio sources (single and multiple) were used to evaluate localization accuracy. Results show good correlation regarding listening quality and localization accuracy between objective quality scores using AMBIQUAL and subjective scores obtained during listening tests.

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Più fonti

Tesi sul tema "Ambisonic"

Bassett, John. "Assessing the Spatial Diffusivity of Sound Fields in Rooms using Ambisonic Techniques". Thesis, The University of Sydney, 2012. http://hdl.handle.net/2123/8255.

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This thesis explores the means of objectively measuring diffuse sound fields contained within music performance auditoria. Although the diffuse field is considered to be an important component of the reverberant sound field there is currently no widely accepted method for its measurement. A review of methods shows that attempts to characterize the field may be divided into those methods that seek to directly measure the state of the field and those that indirectly indicate the existence of the state. The primary focus of this thesis is the application of Ambisonic techniques to capture the spatial aspects of the sound field. Initial work explores the rotation of a directional microphone in three measurement spaces. The results and modeling in idealised simulated sound fields indicate that the method may have some efficacy. The method is extended through the application of signal processing to the output of an Ambisonic microphone array. The method is tested firstly in a reverberation room that is modified progressively to produce a series of room states with incrementally increasing reverberation time. The extents of the measurement system were tested by measuring the degrees of diffusivity reached in a reverberation room. Diffusing panels were progressively added in the expectation the increases in diffusivity would be detected. The measurement was carried out in conjunction with standard absorption coefficient measurements outlined in Appendix A of ISO 354. Comparison was made between the measured field and the standard method for achieving a diffuse field in a reverberation room test facility. The final stage attempts to find correlation between physical measures of diffuse fields and listener’s subjective assessment of those fields. To that end a paired comparison test was conducted where listeners were presented music samples rendered through simulated halls where the scattering coefficients and consequently the sound field diffusivity was varied. Subjects were asked to choose which pair they preferred.

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Pérez, López Andrés. "Parametric analysis of ambisonic audio: a contributions to methods, applications and data generation". Doctoral thesis, Universitat Pompeu Fabra, 2020. http://hdl.handle.net/10803/669962.

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Due to the recent advances in virtual and augmented reality, ambisonics has emerged as the de facto standard for immersive audio. Ambisonic audio can be captured using spherical microphone arrays, which are becoming increasingly popular. Yet, many methods for acoustic and microphone array signal processing are not speci cally tailored for spherical geometries. Therefore, there is still room for improvement in the eld of automatic analysis and description of ambisonic recordings. In the present thesis, we tackle this problem using methods based on the parametric analysis of the sound eld. Speci cally, we present novel contributions in the scope of blind reverberation time estimation, diffuseness estimation, and sound event localization and detection. Furthermore, several software tools developed for ambisonic dataset generation and management are also presented.

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Cannon, Joanne. "Playable ambisonic spatial motion : music performance techniques and mappings for the extended bassoon /". Connect thesis, 2009. http://repository.unimelb.edu.au/10187/7120.

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This research dissertation presents work undertaken to develop new performance techniques and mappings for the expressive control of spatial motion using Ambisonic projection. The dissertation reviews relevant research from the fields of Spatial Sound and Extended Instruments, and establishes playability as a useful set of criteria for a reflexive project methodology and evaluation. This reflexive research systematically investigates Trevor Wishart’s taxonomy of spatial motions through the development of new hardware, software, performance techniques and spatial motion analysis.

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Trzos, Michal. "Popis a reprezentace dvourozměrných zvukových scén ve vícekanálových systémech reprodukce zvuku". Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218070.

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This thesis deals with cues used by the human auditory system to identify the location of sound and methods for sound localisation based these cues, namely, vector based amplitude panning and ambisonics, which are described in detail. These methods have been implemented as a VST plug-in module. This thesis also contains listening tests of second order ambisonics along with acquired data analysis.

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Yao, Shu-Nung. "Rendering ambisonics over headphones". Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6248/.

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There are several methods to get individualized HRTFs such as measurements, syntheses, or selection. The study first aims to select the fittest HRTFs in an existing database for listeners. The idea is developed based on the connection between anthropometric parameters and auditory localisation. By means of machine learning, the neural network designed for HRTF ranking produces a reliable prediction. The new approach has been verified by the anthropometry and listening perception of 24 subjects. The final selected dataset is used to synthesize a virtual audio scene. Two binaural ambisonic decoders are proposed to overcome the dilemma of improving sound localisation or enhancing audio quality. The first one is the equalization decoding, equalizing the root mean square (RMS) power in each 1/3 octave frequency bank, especially compensating the low-pass filtered components in a high-density speaker array. Therefore, the energy distribution of the treated signal is nearly uniform. The other proposed method is split-band decoding, selecting and then mixing the better reconstructed frequency components from different speaker arrays. Through several experiments and listening tests, there are no click noises in the real-time system, when the virtual auditory space is rapidly rotated. The split-band decoder presents comparable performance to a pure HRTF decoder.

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DE, SOTGIU ANDREA. "Musica Immersiva in Formato Binaurale". Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1090954.

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La tesi si propone di studiare la percezione del senso di immersività nella musica in formato binaurale, con l’obiettivo di migliorare l’esperienza d’ascolto e metterla a confronto con la musica ascoltata in formato stereofonico. Attraverso un’analisi delle basi della fisica del suono e della psicoacustica, il saggio vuole illustrare quali sono le tecnologie che permettono alla musica immersiva di essere prodotta. A tal proposito verranno presi in esame sia la storia delle tecniche di riproduzione sonora, che gli strumenti attualmente disponibili, per permettere alla comunità scientifica di avere un quadro completo sulle risorse odierne. Il binomio tra musica e spatial audio è in continua crescita con il passare del tempo, per questo il testo si propone anche di evidenziare quali sono i principali problemi di ricerca e gli standard necessari sui quali concentrare eventuali prossimi lavori. Il saggio si conclude con un esperimento che mette a confronto due differenti tipologie di mix di una canzone: una versione stereofonica e una versione in formato binaurale, processata tramite la Digital Audio Workstation Logic Pro X e la Dolby Atmos Production Suite. I risultati porteranno delle evidenze interessanti a favore della versione in formato binaurale e diverse suggestioni sugli sviluppi futuri.
The thesis aims to study the perception of the sense of immersion in music in binaural format, with the target of improving the listening experience and comparing it with the music listened to in stereophonic format. Through an analysis of the basics of the physics of sound and psychoacoustics, the essay wants to illustrate which technologies allow immersive music to be produced. In this regard, both the history of sound reproduction techniques and the tools currently available will be examined to allow the scientific community to have a complete picture of today's resources. The combination of music and spatial audio is constantly growing with the passage of the years, which is why the text also aims to highlight the main research problems and the necessary standards on which to focus any future works. The essay ends with an experiment that compares two different types of song mixes: a stereo version and a binaural format version, processed through the Digital Audio Workstation Logic Pro X and the Dolby Atmos Production Suite. The results will bring interesting evidence in favor of the binaural format version and various suggestions on future developments.

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Stitt, Peter. "Ambisonics and higher-order ambisonics for off-centre listeners : evaluation of perceived and predicted image direction". Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.677279.

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Higher Order Ambisonics is a spatial audio technique that aims to recreate a sound image over as large a listening area as possible. Only limited investigation has taken place into localisation with Ambisonics and Higher Order Ambisonics at off-centre listening positions. This thesis presents the results of three psychoacoustic localisation experiments Investigating off-centre localisation of first and third order Ambisonics under different conditions: for studio and concert hall sized arrays, and for transient vs ongoing stimuli. A detailed analysis of the results of each experiment is carried out 'to determine the robustness of the tested systems. Comparisons are made between the results of the three experiments to determine the influence of changing the stimulus or increasing the arrival time delay between loudspeakers, where the relative gains of the loudspeakers was found to be perceptually more important than increased time differences between them. The usefulness of these results can be increased by comparison with models for prediction of human localisation, where a robust model would afford fast evaluation of ambisonic systems and allow system optimisation for off-centre positions. Therefore, evaluation Is performed for two binaural models on their ability to predict the results of the psychoacoustic experiments. A model by Dietz and a modified version of the Undemann model are evaluated. Finally, the energy vector model, prevalent in the Ambisonics community, is extended to include elements of the precedence effect. The binaural models, the standard energy vector, and the precedence-extended model are evaluated by comparison to the perceptual results. The robustness of each of the binaural and vector models is discussed in the context of their use as predictors of localisation at off-centre listening positions. The predictions of the precedence~extended energy vector are found to exhibit the lowest deviation from the perceptual results.

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Santos, Filipe. "Auralização binaural com HRTF e descodificação de Ambisonics". Master's thesis, Universidade de Aveiro, 2012. http://hdl.handle.net/10773/11364.

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Mestrado em Engenharia Electrónica e Telecomunicações
Este trabalho explora técnicas de auralização 3D binaural (reprodução por head-phones) em tempo-real. Foi criada uma aplicação que permite reproduzir, com base em Head-Related Transfer Functions (HRTF), várias fontes sonoras movimentado-se de forma independente em torno do ouvinte. A aplicação permite usar um sensor para capturar os movimentos da cabeça (head-tracking ) e incorpora um método para eliminação dos artefactos causados pela interpolação entre HRTF. Foram também efectuadas experiências práticas com 16 sujeitos para estudar o impacto perceptual da interpolação de HRTF. Não se encontrou diferença significativa no desempenho de localização espacial de fontes sonoras entre as situações com HRTF interpoladas e HRTF não interpoladas. Foi efectuado um estudo geral sobre Ambisonics e sua descodificação, culminando numa aplicação que permite a abertura de ficheiros Ambisonics e reprodução selectiva dos seus componentes. Permite também a conversão para formato binaural aplicando HRTF aos sinais descodificados (método de altifalantes virtuais)
This work studies different binaural 3D sound auralization techniques in realtime for reproduction with head-phones An application was developed and it allows to play, using Head-Related Transfer Functions (HRTFs), different sounds moving, independently from each-other, around the listener. The application provides a method to overcome de clicks and crackles caused by the HRTFs interpolation and it is possible to capture head movements with the aid of an head-tracking sensor. In order to study the perceptual impact of using HRTFs interpolation an experimental procedure, with sixteen subjects, took place. There was no meaningful diferences between interpolated HRTFs and no interpolated HRTFs in what spatial localization performance matters. Ambisonics and its decoding methods were subject of a broad study and a new application was made. This application can open and play the different channels of an Ambisonics file and can convert to a binaural format using HRTFs (virtual speakers method).

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Lecomte, Pierre. "Ambisonie d'ordre élevé en trois dimensions : captation, transformations et décodage adaptatif de champs sonores". Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/9888.

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Résumé : La synthèse de champs sonores est un domaine de recherche actif trouvant de nombreuses applications musicales, multimédias ou encore industrielles. Dans ce dernier cas, la re- construction précise du champ sonore est souhaitée, ce qui implique de répondre à un certains nombre de questionnements scientifiques. À l’aide de réseaux de microphones et de haut-parleurs, la captation, la synthèse et la reconstruction précise de champs sonores sont théoriquement possibles. Seulement, pour des applications pratiques, la disposition des haut-parleurs et l’influence acoustique du lieu de restitution sont des facteurs cruciaux à prendre en compte pour s’assurer de la bonne reconstruction du champ sonore. Dans ce contexte, cette thèse de doctorat propose des méthodes et des techniques pour la captation, la transformation et la reconstruction précise de champs sonores en trois dimen- sions en se basant sur la méthode ambisonique d’ordre élevé. Une configuration sphérique pour le réseau de microphones et de haut-parleurs est proposée. Elle suit un maillage de Lebedev à cinquante points qui permet la captation et la reconstruction du champ sonore jusqu’à l’ordre 5 avec le formalisme ambisonique. Les limitations de cette approche, tel le repliement spatial, sont étudiés en détails. De plus, une opération de transformation du champ sonore est présentée. Elle est établie dans le domaine des harmoniques sphériques et permet d’effectuer un filtrage directionnel avant le décodage pour privilégier certaines directions dans le champ sonore, suivant une fonction de directivité choisie. Pour la re- construction, une approche originale, également établie dans le domaine des harmoniques sphériques, permet de prendre en compte l’influence acoustique du lieu de restitution, ainsi que les défauts du système de restitution. Ce traitement permet alors d’adapter la synthèse de champs sonores au lieu de restitution, en conservant le formalisme théorique établi en champ libre. Finalement, une validation expérimentale des méthodes et des tech- niques développées au cours de la thèse est faite. Dans ce contexte, une suite logicielle de synthèse et traitement en temps-réel des champs sonore est développée.
Abstract : Sound field synthesis is an active research domain with various musical, multimedia or industrial applications. In the latter case, the accurate reconstruction of the sound field is targeted, which involves answering several scientific questions. Using arrays of microphones and loudspeakers, the capture, synthesis and accurate reconstruction of sound fields are theoretically possible. However, for practical applications, the arrangement of the loud- speakers and the acoustic influence of the restitution room are critical factors to consider in order to ensure the accurate reconstruction of the sound field. In this context, this thesis proposes methods and techniques for the capture, transforma- tions and accurate reconstruction of sound fields in three dimensions based on the Higher Order Ambisonics (HOA) method. A spherical configuration for the array of microphones and loudspeakers is proposed. It follows a fifty-node Lebedev grid that enables the capture and reconstruction of the sound field up to order 5 with HOA formalism. The limitations of this approach, such as the spatial aliasing, are studied in detail. A transformation op- eration of the sound field is also proposed. The formulation is established in the spherical harmonics domain and enables a directional filtering on the sound field prior to the decod- ing step. For the reconstruction of the sound field, an original approach, also established in the spherical harmonics domain, can take into account the acoustic influence of the restitution room and the defects of the playback system. This treatment then adapts the synthesis of sound fields to the restitution room, maintaining the theoretical formalism established in free field. Finally, an experimental validation of methods and techniques developed in the thesis is made. In this context, a digital signal processing toolkit is de- veloped. It process in real-time the microphones, ambisonics, and loudspeaker signals for the sound field capture, transformations, and decoding.

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Colafrancesco, Julien. "Spatialisation de sources auditives étendues : applications musicales avec la bibliothèque HOA". Thesis, Paris 8, 2015. http://www.theses.fr/2015PA080092.

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Les principales techniques de spatialisation sonores sont pour la plupart orientées vers la reproduction de sources ponctuelles, l’étendue reste un sujet peu exploré. Cette thèse défend l’idée que les sources étendues sont pourtant des objets expressifs pouvant significativement contribuer à la richesse des pratiques de spatialisation, notamment en musique. Nous décomposerons cette thèse en trois hypothèses. La première, auditive, postulera que les sources étendues sont pertinentes perceptivement. C’est-à-dire qu’elles offrent la possibilité de faire varier de nouveaux attributs sonores et que l’auditeur est sensible à ces variations. La seconde, analytique, proposera que la polarisation des techniques de spatialisation les plus courantes vers la source ponctuelle n’est qu’arbitraire et que d’autres modèles de sources peuvent être considérés. La troisième, opérationnelle, suggèrera qu’il est possible de créer des outils permettant aux compositeurs de manier et de s’approprier les sources étendues à des fins musicales.Pour valider ces hypothèses, nous formaliserons les propriétés auditives et musicales de ces sources puis nous proposerons des méthodes concrètes pour les analyser et les synthétiser. Ces travaux seront considérés dans le cadre de la bibliothèque HOA, un ensemble d’outils de spatialisation de bas niveau que nous avons spécialement fondé à des fins d’expérimentations. Nous décrirons les spécificités de cette bibliothèque. Nous verrons notamment comment son architecture et ses différents modules permettent d’ouvrir l’ambisonie à de nouvelles pratiques éloignées du concept de ponctualité
Mainstream spatialization techniques are often oriented towards the reproduction of point sources; extension remains a relatively unexplored topic. This thesis advocates that extended sources are yet expressive objects that could contribute to the richness of spatialization practices, especially in the field of music. We’ll decompose this thesis in three hypotheses. A perceptive one, who postulates that extended sources are perceptually relevant, i.e., that they offer the possibility of varying new sound attributes and that the listener is sensitive to these variations. An analytical one, who proposes that the most common spatialization techniques focus to point sources is arbitrary and that other source’s models can be considered. And an operational one, who suggests that it’s possible to create tools for composers so they can handle and musicalize extended objects. To confirm these hypotheses, we’ll formalize the auditory and musical properties of extended sources and we’ll propose concrete methods for their analysis and synthesis. This work will be considered as part of the HOA library, a set of low-level spatialization tools we’ve founded for the purpose of experimentation. We’ll describe the specificities of this library and see how its architecture and its different modules allow the generalization of ambisonics to new practices away of punctuality

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Libri sul tema "Ambisonic"

Zotter, Franz, e Matthias Frank. Ambisonics. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7.

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Zotter, Franz. Ambisonics: A Practical 3D Audio Theory for Recording, Studio Production, Sound Reinforcement, and Virtual Reality. Cham: Springer Nature, 2019.

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Ambisonics: A Practical 3D Audio Theory for Recording, Studio Production, Sound Reinforcement, and Virtual Reality. Springer, 2019.

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Capitoli di libri sul tema "Ambisonic"

Zotter, Franz, e Matthias Frank. "Signal Flow and Effects in Ambisonic Productions". In Ambisonics, 99–129. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_5.

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Zotter, Franz, e Matthias Frank. "Ambisonic Amplitude Panning and Decoding in Higher Orders". In Ambisonics, 53–98. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_4.

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Mcloughlin, Michael. "Overview of Virtual Ambisonic Systems". In Encyclopedia of Computer Graphics and Games, 1–4. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-08234-9_275-1.

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Zotter, Franz, e Matthias Frank. "Higher-Order Ambisonic Microphones and the Wave Equation (Linear, Lossless)". In Ambisonics, 131–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_6.

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Goodwin, Simon N. "Ambisonic Surround-Sound Principles and Practice". In Beep to Boom, 197–223. New York, NY : Routledge, 2019. | Series: Audio engineering society presents …: Routledge, 2019. http://dx.doi.org/10.4324/9781351005548-19.

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Werner, Duncan, Bruce Wiggins e Emma Fitzmaurice. "Development of an Ambisonic Guitar System". In Innovation in Music, 125–45. New York: Routledge, 2021. | Series: Perspectives on music production: Focal Press, 2020. http://dx.doi.org/10.4324/9780429345388-10.

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Tsang, Peter Wai-Ming, Wai Keung Cheung e Chi Sing Leung. "Decoding Ambisonic Signals to Irregular Loudspeaker Configuration Based on Artificial Neural Networks". In Neural Information Processing, 273–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-10684-2_30.

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Zotter, Franz, e Matthias Frank. "XY, MS, and First-Order Ambisonics". In Ambisonics, 1–22. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_1.

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Zotter, Franz, e Matthias Frank. "Auditory Events of Multi-loudspeaker Playback". In Ambisonics, 23–40. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_2.

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Zotter, Franz, e Matthias Frank. "Amplitude Panning Using Vector Bases". In Ambisonics, 41–52. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-17207-7_3.

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Atti di convegni sul tema "Ambisonic"

Herzog, Adrian, Srikanth Raj Chetupalli e Emanuel A. P. Habets. "AmbiSep: Ambisonic-to-Ambisonic Reverberant Speech Separation Using Transformer Networks". In 2022 International Workshop on Acoustic Signal Enhancement (IWAENC). IEEE, 2022. http://dx.doi.org/10.1109/iwaenc53105.2022.9914735.

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MAHE, Pierre, Stephane RAGOT, Sylvain MARCHAND e Jerome DANIEL. "Ambisonic Coding with Spatial Image Correction". In 2020 28th European Signal Processing Conference (EUSIPCO). IEEE, 2021. http://dx.doi.org/10.23919/eusipco47968.2020.9287500.

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Birnie, Lachlan, Zamir Ben-Hur, Vladimir Tourbabin, Thushara Abhayapala e Prasanga Samarasinghe. "Bilateral-Ambisonic Reproduction by Soundfield Translation". In 2022 International Workshop on Acoustic Signal Enhancement (IWAENC). IEEE, 2022. http://dx.doi.org/10.1109/iwaenc53105.2022.9914780.

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Perez-Lopez, Andres, Archontis Politis e Emilia Gomez. "Blind reverberation time estimation from ambisonic recordings". In 2020 IEEE 22nd International Workshop on Multimedia Signal Processing (MMSP). IEEE, 2020. http://dx.doi.org/10.1109/mmsp48831.2020.9287128.

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McCormack, Leo, e Archontis Politis. "Estimating and Reproducing Ambience in Ambisonic Recordings". In 2022 30th European Signal Processing Conference (EUSIPCO). IEEE, 2022. http://dx.doi.org/10.23919/eusipco55093.2022.9909850.

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Wabnitz, Andrew, Nicolas Epain, Alistair McEwan e Craig Jin. "Upscaling Ambisonic sound scenes using compressed sensing techniques". In 2011 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA). IEEE, 2011. http://dx.doi.org/10.1109/aspaa.2011.6082301.

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Cheng, Bin, Christian Ritz e Ian Burnett. "A Spatial Squeezing approach to Ambisonic audio compression". In ICASSP 2008 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing. IEEE, 2008. http://dx.doi.org/10.1109/icassp.2008.4517623.

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Nikunen, Joonas, e Archontis Politis. "Multichannel NMF for Source Separation with Ambisonic Signals". In 2018 16th International Workshop on Acoustic Signal Enhancement (IWAENC). IEEE, 2018. http://dx.doi.org/10.1109/iwaenc.2018.8521344.

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Routray, Gyanajyoti, e Rajesh M. Hegde. "Sparse Plane-wave Decomposition for Upscaling Ambisonic Signals". In 2020 International Conference on Signal Processing and Communications (SPCOM). IEEE, 2020. http://dx.doi.org/10.1109/spcom50965.2020.9179569.

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Green, Marc C., Sharath Adavanne, Damian Murphy e Tuomas Virtanen. "Acoustic Scene Classification Using Higher-Order Ambisonic Features". In 2019 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA). IEEE, 2019. http://dx.doi.org/10.1109/waspaa.2019.8937282.

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Rapporti di organizzazioni sul tema "Ambisonic"

Skoglund, J., e M. Graczyk. Ambisonics in an Ogg Opus Container. RFC Editor, ottobre 2018. http://dx.doi.org/10.17487/rfc8486.

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