• Extremes of error exponents

  Guillén i Fàbregas, Albert; Land, Ingmar; Martinez, Alfonso (Institute of Electrical and Electronics Engineers (IEEE), 2013)

  This paper determines the range of feasible values of standard error exponents for binary-input memoryless symmetric channels of fixed capacity C and shows that extremes are attained by the binary symmetric and the binary ...
• Mismatched decoding: error exponents, second-order rates and saddlepoint approximations

  Scarlett, Jonathan; Martinez, Alfonso; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2014)

  This paper considers the problem of channel coding with a given (possibly suboptimal) maximum-metric decoding rule. A cost-constrained random-coding ensemble with multiple auxiliary costs is introduced, and is shown to ...
• Expurgated random-coding ensembles: exponents, refinements and connections

  Scarlett, Jonathan; Peng, Li; Merhav, Neri; Martinez, Alfonso; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2014)

  This paper studies expurgated random-coding bounds and exponents for channel coding with a given (possibly suboptimal) decoding rule. Variations of Gallager's analysis are presented, yielding several asymptotic and ...
• MIMO block-fading channels with mismatched CSI

  Asyhari, A. Taufiq; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2014)

  We study transmission over multiple-input multiple-output block-fading channels with imperfect channel state information (CSI) at both the transmitter and receiver. In particular, based on mismatched decoding theory for a ...
• Hypernym extraction: combining machine-learning and dependency grammar

  Espinosa-Anke, Luis; Ronzano, Francesco; Saggion, Horacio (Springer, 2015)

  Hypernym extraction is a crucial task for semantically motivated NLP tasks such as taxonomy and ontology learning, textual entailment or paraphrase identification. In this paper, we describe an approach to hypernym extraction ...
• A Derivation of the source-channel error exponent using nonidentical product distributions

  Tauste Campo, Adrià; Vazquez-Vilar, Gonzalo; Guillén i Fàbregas, Albert; Koch, Tobias; Martinez, Alfonso (Institute of Electrical and Electronics Engineers (IEEE), 2014)

  This paper studies the random-coding exponent of joint source-channel coding for a scheme where source messages are assigned to disjoint subsets (referred to as classes), and codewords are independently generated according ...
• Second-order rate region of constant-composition codes for the multiple-access channel

  Scarlett, Jonathan; Martinez, Alfonso; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2015)

  This paper studies the second-order asymptotics of coding rates for the discrete memoryless multiple-access channel (MAC) with a fixed target error probability. Using constant-composition random coding, coded time-sharing, ...
• A Counter-example to the mismatched decoding converse for binary-input discrete memoryless channels

  Scarlett, Jonathan; Somekh-Baruch, Anelia; Martinez, Alfonso; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2015)

  This paper studies the mismatched decoding problem for binary-input discrete memoryless channels. An example is provided for which an achievable rate based on superposition coding exceeds the Csiszár-Körner-Hui rate, thus ...
• Bayesian M-Ary hypothesis testing: the meta-converse and Verdú-Han bounds are tight

  Vazquez-Vilar, Gonzalo; Tauste Campo, Adrià; Guillén i Fàbregas, Albert; Martinez, Alfonso (Institute of Electrical and Electronics Engineers (IEEE), 2016)

  Two alternative exact characterizations of the minimum error probability of Bayesian M-ary hypothesis testing are derived. The first expression corresponds to the error probability of an induced binary hypothesis test and ...
• Multiuser random coding techniques for mismatched decoding

  Scarlett, Jonathan; Martinez, Alfonso; Guillén i Fàbregas, Albert (Institute of Electrical and Electronics Engineers (IEEE), 2016)

  This paper studies multiuser random coding techniques for channel coding with a given (possibly suboptimal) decoding rule. For the mismatched discrete memoryless multiple-access channel, an error exponent is obtained that ...
• Automatic transcription of flamenco guitar falsetas

  Rodríguez, Sonia; Gómez Gutiérrez, Emilia, 1975-; Cuesta i Mussarra, Helena (Folk Music Analysis, 2018)

  This work deals with the automatic transcription and characterization of flamenco guitar, with a focus on short melodic interludes improvised between sung verses. These are called falsetas in the flamenco argot and are ...
• Width and complexity of belief tracking in non-deterministic conformant and contingent planning

  Bonet, Blai; Geffner, Héctor (Association for the Advancement of Artificial Intelligence (AAAI), 2012)

  It has been shown recently that the complexity of belief tracking in deterministic conformant and contingent planning is exponential in a width parameter that is often bounded and small. In this work, we introduce a new ...
• Action selection for MDPs: anytime AO* vs. UCT

  Bonet, Blai; Geffner, Héctor (Association for the Advancement of Artificial Intelligence (AAAI), 2012)

  In the presence of non-admissible heuristics, A* and other best-first algorithms can be converted into anytime optimal algorithms over OR graphs, by simply continuing the search after the first solution is found. The ...
• Cante Flamenco Tech: aprendizaje del cante con la ayuda de la tecnología

  Gómez Gutiérrez, Emilia, 1975-; Guerrero, Alba; Rodríguez, Sonia (2018)

  Cante Flamenco Tech es un proyecto pedagógico cuyo objetivo es el de generar materiales docentes online para el aprendizaje del cante flamenco, siguiendo un énfasis tecnolégico. Para ello, el proyecto integra las tecnologías ...
• Analysis of intonation in unison choir singing

  Cuesta i Mussarra, Helena; Gómez Gutiérrez, Emilia, 1975-; Martorell Domínguez, Agustín; Loáiciga, Felipe (2018)

  Choir singers synchronize their fundamental frequency (f0) and timing when they perform together. In this work, we investigate several expressive characteristics of choir singing, with special emphasis on unison ...
• Musical instrument recognition in user-generated videos using a multimodal convolutional neural network architecture

  Slizovskaia, Olga; Gómez Gutiérrez, Emilia, 1975-; Haro Ortega, Gloria (ACM Association for Computer Machinery, 2017)

  This paper presents a method for recognizing musical instruments in user-generated videos. Musical instrument recognition from music signals is a well-known task in the music information retrieval (MIR) field, where current ...
• A neural parametric singing synthesizer

  Blaauw, Merlijn; Bonada, Jordi, 1973- (International Speech Communication Association (ISCA), 2017)

  We present a new model for singing synthesis based on a modified version of the WaveNet architecture. Instead of modeling raw waveform, we model features produced by a parametric vocoder that separates the influence of ...
• Multimodal methodological approach for participatory design of Full-Body Interaction Learning Environments

  Malinverni, Laura; Schaper, Marie-Monique; Parés, Narcís, 1966- (SAGE Publications, 2018)

  Over the past years an increasing number of digital learning environments based on Full-Body Interaction have been developed. Research in this field is often based on Designer-Driven approaches and is only recently employing ...
• The Role of indirect mechanotransduction phenomena in microtrauma development within intervertebral discs – a computational biophysical analysis

  Baumgartner, Laura; González Ballester, Miguel Ángel, 1973-; Noailly, Jérôme (International Research Council on Biomechanics of Injury (IRCOBI), 2018)

  The causes of intervertebral disc (IVD) ruptures continue to elude both biomechanists and clinicians. It is widely accepted that unique traumatic high‐load impacts are unlikely to lead to isolated IVD herniation. Therefore, ...
• Developing a scheme to report AIS‐coded injury severity for swiss traffic accident data

  Schmitt, Kai‐Uwe; Baumgartner, Laura; Muser, Markus; Furter, Kerstin; Scholz, Stefan; Lüber, Barbara; Thomas, Pete; Simma, Anja (International Research Council on Biomechanics of Injury (IRCOBI), 2014)

  National accident statistics in European countries as well as in many other countries are based on data recorded by the police. Generally, such data also include police reported estimates of the injury severity of accident ...

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