1,720,960 research outputs found
METHOD FOR ACQUIRING AUDIO SIGNALS, AND AUDIO ACQUISITION SYSTEM THEREOF
No full textMethod for acquiring audio signals is described, wherein a
microphone probe (11) equipped with a plurality (Y) of
microphone capsules (B) detects a plurality of audio signals,
and wherein said detected audio signals are combined
together in order to obtain a virtual microphone signal. The
latter is generated as a function of characteristic probe data
(IRs) measured during a probe characterization step, wherein
the signals detected by each microphone capsule (B) are
measured following a corresponding predetermined test signal.
An audio acquisition system is also described which
allows to implement the method
metodo per acquisire segnali audio e relativo sistema di acquisizione audio
No full textViene descritto un metodo per acquisire segnali audio, in
cui una sonda microfonica (11) provvista di una pluralità
(Y) di capsule microfoniche (B) rileva una pluralità di
segnali audio ed in cui si combinano detti segnali audio
rilevati per ottenere un segnale di un microfono
virtuale. Quest’ultimo viene generato in funzione di dati
(IRs) caratterizzanti la sonda misurati in una fase di
caratterizzazione della sonda, in cui si misurano i
segnali rilevati da ogni capsula microfonica (B) a
seguito di un corrispondente segnale di test
predeterminato. Viene altresì descritto un sistema di
acquisizione audio che permette di implementare il
metodo
360 Degrees Video And Audio Recording And Broadcasting Employing A Parabolic Mirror Camera And A Spherical 32-Capsules Microphone Array
No full text3D Virtual Microphone System - Sonda Microfonica ad Elevata Direttivita'
Get PDFSono descritte la teoria del nuovo sistema di ripresa e registrazione multicanale basato su 32 capsule posizionate su una sonda sferica e alcune applicazioni pratiche.
Con questo sistema si possono sintetizzare in tempo reale fino a 7 microfoni virtuali potendo scegliere dinamicamente la loro direttività (partendo da un omnidirezionale, passando ad un cardioide standard e arrivando ad un cardioide di ordine 6 ultradirettivo) e la loro posizione spaziale.
Un'interfaccia grafica ne permette il posizionamento ed il movimento su un'immagine video a 360°.
Il sistema è basato su un nuovo approccio matematico al calcolo della matrice di filtri FIR da convolvere in tempo reale con il segnale proveniente dalle capsule microfoniche; il tempo di latenza è ridotto grazie ad un processore di convoluzione partizionato
A spherical microphone array for synthesizing virtual directive microphones in live broadcasting and
No full textThe paper describes the theory and the first operational results of a new multichannel recording system based on a 32-capsules spherical microphone array. Up to 7 virtual microphones can be synthesized in real-time, choosing dynamically the directivity pattern (from standard cardioid to 6th-order ultradirective) and the aiming. A graphical user’s interface allows for moving the virtual microphones over a 360-degrees video image. The system employs a novel mathematical theory for computing the matrix of massive FIR filters, which are convolved in real time and with small latency thanks to a partitioned convolution processor
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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