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Author = Dorran, David;
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Displaying Results 26 - 39 of 39 on page 2 of 2
Marked
Mark
Pitch Tracking and Voiced/Unvoiced Detection in Noisy Environment using Optimat Sequence Estimation
(2008)
Wasserblat, Moshe; Gainza, Mikel; Dorran, David; Domb, Yuval
Pitch Tracking and Voiced/Unvoiced Detection in Noisy Environment using Optimat Sequence Estimation
(2008)
Wasserblat, Moshe; Gainza, Mikel; Dorran, David; Domb, Yuval
Abstract:
This paper addresses the problem of pitch tracking and voiced/unvoiced detection in noisy speech environments. An algorithm is presented which uses a number of variable thresholds to track pitch contour with minimal error. This is achieved by modeling the pitch tracking problem in such a way that allows the use of optimal estimation methods, such MLSE. The performance of the algorithm is evaluated using the Keele pitch detection database with realistic background noise. Results show best performance in comparison to other state of the art pitch detector and successful pitch tracking is possible in low signal to noise conditions.
https://arrow.dit.ie/argcon/38
Marked
Mark
Single Channel Sound Source Separation Combining Delay Estimation and the AdRess Algorithm
(2008)
Leddy, Mark; Barry, Dan; Dorran, David; Coyle, Eugene
Single Channel Sound Source Separation Combining Delay Estimation and the AdRess Algorithm
(2008)
Leddy, Mark; Barry, Dan; Dorran, David; Coyle, Eugene
Abstract:
A method for single channel source separation is proposed in this paper, which uses estimates fo the delay co-efficient of individual sources within an echoic mixture using autocorrelation, following which a "pseudo-stereo mixture" is generated, to which the ADRess algorithm can be applied. The system is evaluated in a theoretical situation, where the mixture signal to be separated consists of two individual source signals, and a delayed version of each signal. Estimates of the individual delay lengths are made and then used to create a pseudo stereo mix, where one channel consists of the orginal mixture signal, and the second channel consists of the original signal shifted by the length of the delay calculated for each source. The ADRess algorithm is then used to separate sources from the new pseudo stereo mixture.
https://arrow.dit.ie/argcon/4
Marked
Mark
Structural Segmentation of Irish Traditional Music using Chroma at Set Accented Tone Locations
(2009)
Kelly, Cillian; Gainza, Mikel; Dorran, David; Coyle, Eugene
Structural Segmentation of Irish Traditional Music using Chroma at Set Accented Tone Locations
(2009)
Kelly, Cillian; Gainza, Mikel; Dorran, David; Coyle, Eugene
Abstract:
An approach is presented which provides a structural segmentation of Irish Traditional Music. Chroma information is extracted at certain locations within the music. The resulting chroma vectors are compared to determine similar structural segments. Chroma is only calculated at "set accented tone" locatins within the music. "Set accented tones" are considered to be impervious to melodic variation and are entirely representative of an Irish Traditional tune. Results show that comparing "set accented tones" represented by chroma significantly increases the structural segmentation accuracy that when "set accented tones" are represented by pitch values.
https://arrow.dit.ie/argcon/53
Marked
Mark
Structural Segmentation using Set Accented Tones
(2008)
Kelly, Cillian; Gainza, Mikel; Dorran, David; Coyle, Eugene
Structural Segmentation using Set Accented Tones
(2008)
Kelly, Cillian; Gainza, Mikel; Dorran, David; Coyle, Eugene
Abstract:
An approach which efficiently segments Irish Traditional Music into its constituent structural segments is presented. The complexity of the segmentation process is greatly increased due to melodic variation existent within this music type. In order to deal with these variations, a novel method using ‘set accented tones’ is introduced. The premise is that these tones are less susceptible to variation than all other tones. Thus, the location of the accented tones is estimated and pitch information is extracted at these specific locations. Following this, a vector containing the pitch values is used to extract similar patterns using heuristics specific to Irish Traditional Music. The robustness of the approach is evaluated using a set of commercially available Irish Traditional recordings.
https://arrow.dit.ie/argcon/54
Marked
Mark
The DiTME Project: interdisciplinary research in music technology
(2007)
Coyle, Eugene; Barry, Dan; Gainza, Mikel; Dorran, David; Pritchard, Charles; Feeley, Jo...
The DiTME Project: interdisciplinary research in music technology
(2007)
Coyle, Eugene; Barry, Dan; Gainza, Mikel; Dorran, David; Pritchard, Charles; Feeley, John; Fitzgerald, Derry
Abstract:
This paper profiles the emergence of a significant body of research in audio engineering within the Faculties of Engineering and Applied Arts at Dublin Institute of Technology. Over a period of five years the group has had significant success in completing a Strand 3 research project entitled Digital Tools for Music Education (DiTME).
https://arrow.dit.ie/engscheleart/1
Marked
Mark
Time and Pitch Scale Modification: a Real-time Framework and Tutorial
(2008)
Barry, Dan; Dorran, David; Coyle, Eugene
Time and Pitch Scale Modification: a Real-time Framework and Tutorial
(2008)
Barry, Dan; Dorran, David; Coyle, Eugene
Abstract:
A framework is presented which is designed to address the issues related to the real-time implementation of time-scale and pitch scale modification algorithms. This framework can be used as the basis for the developments of applications which allow for a seamless real-time transition between continually varying time scale and pitch-scale parameters which arise as a result of manual or automatic intervention.
https://arrow.dit.ie/argcon/16
Marked
Mark
Time Scale Modification of Music using a Subband Approach Based on the Bark Scale
(2003)
Dorran, David; Lawlor, Robert
Time Scale Modification of Music using a Subband Approach Based on the Bark Scale
(2003)
Dorran, David; Lawlor, Robert
Abstract:
Time-domain time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for use on multi-pitched signals such as polyphonic music. However, time-domain techniques applied on a subband basis can resolve the multi-pitch problem. The authors propose an improved subband implementation based upon the bark scale for the time scale modification of music. The new subband approach is supported by psychoacoustic and music theory and subjectively through informal listening tests.
https://arrow.dit.ie/argcon/20
Marked
Mark
Time-scale modification of music using a subband approach based on the bark scale
(2003)
Dorran, David; Lawlor, Bob
Time-scale modification of music using a subband approach based on the bark scale
(2003)
Dorran, David; Lawlor, Bob
Abstract:
Time-domain time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for use on multi-pitched signals such as polyphonic music. However, time-domain techniques applied on a subband basis can resolve the multi-pitch problem. We propose an improved subband implementation based upon the bark scale for the time-scale modification of music. The new subband approach is supported by psychoacoustic and music theory and subjectively through informal listening tests.
http://mural.maynoothuniversity.ie/8790/
Marked
Mark
Time-scale Modification of Music using a Synchronized Subband/Time-domain Approach
(2004)
Dorran, David; Lawlor, Robert
Time-scale Modification of Music using a Synchronized Subband/Time-domain Approach
(2004)
Dorran, David; Lawlor, Robert
Abstract:
Time-domain audio time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for direct application to complex multi-pitched signals such as polyphonic music. However, it has been shown that applying time-domain algorithms on a subband basis can resolve this issue. Existing subband/time domain approaches result in a reverberant/phasy artifact being introduced into the output due to poor synchronization between time-scaled subbands. This paper presents a number of synchronization schemes that greatly reduce the amount of reverberation/phasiness introduced into the time-scaled output by existing subband/time domain approach.
https://arrow.dit.ie/argcon/24
Marked
Mark
Time-scale modification of music using a synchronized subband/time-domain approach
(2004)
Dorran, David; Lawlor, Bob
Time-scale modification of music using a synchronized subband/time-domain approach
(2004)
Dorran, David; Lawlor, Bob
Abstract:
Time-domain audio time-scaling algorithms are efficient in comparison to their frequency-domain counterparts, but they rely upon the existence of a quasi-periodic signal to produce a high quality output. This requirement makes them unsuitable for direct application to complex multi-pitched signals such as polyphonic music. However, it has been shown that applying time-domain algorithms on a subband basis can resolve this issue. Existing subband/time-domain approaches result in a reverberant/phasy artifact being introduced into the output due to poor synchronization between time-scaled subbands. This paper presents a number of synchronization schemes that greatly reduce the amount of reverberation/phasiness introduced into the time-scaled output by existing subband/time-domain approaches.
http://mural.maynoothuniversity.ie/8827/
Marked
Mark
Time-Scale Modification of Speech Using a Synchronised and Adaptive Overlap-add (SAOLA) Algorithm
(2003)
Dorran, David; Lawlor, Robert; Coyle, Eugene
Time-Scale Modification of Speech Using a Synchronised and Adaptive Overlap-add (SAOLA) Algorithm
(2003)
Dorran, David; Lawlor, Robert; Coyle, Eugene
Abstract:
The synchonised overlap-add (SOLA) algorithm is a commercially popular and considerably researched audio time-scale modification technique. It operates in the time domain and uses a correlation technique to ensure that synthesis frames overlap in a synchronous manner. We present a modification to SOLA that allows the analysis step size adapt to the desired time-scale factor. The synchronised and adaptive overlap-add (SAOLA) alogorithm improves upon the output quality of SOLA for high time-scale factors and reduces the computational requirements for low time-scale factors. However, the computational requirements for high time-scale factors are increased.
https://arrow.dit.ie/argcon/32
Marked
Mark
Towards a Method to Determine the Glottal Formant Parameters of Voiced Speech without Time-Domain Reference
(2010)
O'Cinneide, Alan; Dorran, David; Gainza, Mikel; Coyle, Eugene
Towards a Method to Determine the Glottal Formant Parameters of Voiced Speech without Time-Domain Reference
(2010)
O'Cinneide, Alan; Dorran, David; Gainza, Mikel; Coyle, Eugene
Abstract:
This paper presents an approach to estimate the glottal formant parameters of the voicing source in the frequency-domain. The method is based on a simplified pole-zero interpretion of the prevalent Liljencrants-Fant (LF) model of glottal flow, and gives approximations for a broad range of pulses shapes. An advantage of the method is that, unlike other methods, it does not rely on time-domain references.
https://arrow.dit.ie/argcon/57
Marked
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Towards Measuring Continuous Acoustic Feature Convergence in Unconstrained Spoken Dialogues
(2008)
Kousidis, Spyros; Dorran, David; Wang, Yi; Vaughan, Brian; Cullen, Charlie; Campbell, D...
Towards Measuring Continuous Acoustic Feature Convergence in Unconstrained Spoken Dialogues
(2008)
Kousidis, Spyros; Dorran, David; Wang, Yi; Vaughan, Brian; Cullen, Charlie; Campbell, Dermot; McDonnell, Ciaran; Coyle, Eugene
Abstract:
Acoustic/prosodic feature (a/p) convergence has been known to occur both in dialogues between humans, as well as in human-computer interactions. Understanding the form and function of convergence is desirable for developing next generation conversational agents, as this will help increase speech recognition performance and naturalness of synthesized speech. Currently, the underlying mechanisms by which continuous and bi-directional convergence occurs are not well understood. In this study, a direct comparison between time-aligned frames shows significant similarity in acoustic feature variation between the two speakers. The method described (TAMA) constitutes a first step towards a quantitative analysis of a/p convergence.
https://arrow.dit.ie/dmccon/3
Marked
Mark
Use of Interviews for Assessment: A Case Study
(2015)
Dorran, David; Hayes, Richard
Use of Interviews for Assessment: A Case Study
(2015)
Dorran, David; Hayes, Richard
Abstract:
While delivering a module on digital signal processing a series of one-to-one interviews were used extensively to assess undergraduate students. The interviews were organised so as to encourage students to focus on fundamentals before attempting to deal with more complex concepts. Feedback from the students about the process was extremely positive and the vast majority of survey respondents indicated that they found that the interviews motivated them to engage with course material effectively. This paper describes the module setup; the interview process used and discusses the results of the survey.
https://arrow.dit.ie/engscheleart/232
Displaying Results 26 - 39 of 39 on page 2 of 2
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Dublin Institute of Technology (31)
Maynooth University (8)
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Book chapter (4)
Conference item (28)
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Working paper (2)
Other (2)
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Peer-reviewed (7)
Non-peer-reviewed (1)
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2017 (1)
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2010 (6)
2009 (3)
2008 (7)
2007 (2)
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2005 (5)
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