Dr Heidi Christensen

Journal articles

• O’Malley R, Morris L-A, Longden C, Turner A, Walker T, Venneri A, Mirheidari B, Christensen H, Reuber M & Blackburn D (2020) 26 Can an automated assessment of language help distinguish between Functional Cognitive Disorder and early neurodegeneration?. Journal of Neurology, Neurosurgery & Psychiatry, 91(8), e18.2-e19.
• Walker G, Morris L-A, Christensen H, Mirheidari B, Reuber M & Blackburn DJ (2020) Characterising spoken responses to an intelligent virtual agent by persons with mild cognitive impairment. Clinical Linguistics & Phonetics. View this article in WRRO
• Mirheidari B, Pan Y, Blackburn D, O'Malley R, Walker T, Venneri A, Reuber M & Christensen H (2020) Data augmentation using generative networks to identify dementia.. CoRR, abs/2004.05989. View this article in WRRO
• O’Malley R, Mirhedari B, Harkness K, Reuber M, Venneri A, Christensen H & Blackburn D (2019) 055 The digital doctor : a fully automated stratification and monitoring system for patients with memory complaints. Journal of Neurology Neurosurgery & Psychiatry, 90(12). View this article in WRRO
• O’Malley R, Brook E, Lewis A, Sonksen I, Mirhedari B, Venneri A, Christensen H & Blackburn D (2019) 056 Exploring the feasibility of automating verbal fluency tasks for cognitive assessment: data collection and analysis. Journal of Neurology Neurosurgery & Psychiatry, 90(12). View this article in WRRO
• Easton K, Potter S, Bec R, Bennion M, Christensen H, Grindell C, Mirheidari B, Weich S, de Witte L, Wolstenholme D & Hawley M (2019) A virtual agent to support individuals living with physical and mental comorbidities : co-design and acceptability testing. Journal of Medical Internet Research, 21(5). View this article in WRRO
• Al-Hameed S, Benaissa M, Christensen H, Mirheidari B, Blackburn D & Reuber M (2019) A new diagnostic approach for the identification of patients with neurodegenerative cognitive complaints. PLoS ONE, 14(5). View this article in WRRO
• Mirheidari B, Pan Y, Walker T, Reuber M, Venneri A, Blackburn D & Christensen H (2019) Detecting Alzheimer's Disease by estimating attention and elicitation path through the alignment of spoken picture descriptions with the picture prompt.. CoRR, abs/1910.00515.
• Mirheidari B, Blackburn D, Walker T, Reuber M & Christensen H (2019) Dementia detection using automatic analysis of conversations. Computer Speech and Language, 53, 65-79. View this article in WRRO
• Walker T, Christensen H, Mirheidari B, Swainston T, Rutten C, Mayer I, Blackburn D & Reuber M (2018) Developing an intelligent virtual agent to stratify people with cognitive complaints: A comparison of human-patient and intelligent virtual agent-patient interaction.. Dementia. View this article in WRRO
• Orozco-Arroyave JR, Vásquez-Correa JC, Vargas-Bonilla JF, Arora R, Dehak N, Nidadavolu PS, Christensen H, Rudzicz F, Yancheva M, Chinaei H , Vann A et al (2018) NeuroSpeech. SoftwareX, 8, 69-70. View this article in WRRO
• Orozco-Arroyave JR, Vásquez-Correa JC, Vargas-Bonilla JF, Arora R, Dehak N, Nidadavolu PS, Christensen H, Rudzicz F, Yancheva M, Chinaei H , Vann A et al (2018) NeuroSpeech: An open-source software for Parkinson's speech analysis. Digital Signal Processing: A Review Journal, 77, 207-221. View this article in WRRO
• Blackburn D, Mirheidari BM, Rutten C, Mayer I, Walker T, Christensen H & Rueber M (2017) PO029 An avatar aid in memory clinic. Journal of Neurology, Neurosurgery & Psychiatry, 88(Suppl 1), A19.4-A20.
• Cernak M, Orozco-Arroyave JR, Rudzicz F, Christensen H, Vásquez-Correa JC & Nöth E (2017) Characterisation of voice quality of Parkinson’s disease using differential phonological posterior features. Computer Speech & Language, 46, 196-208. View this article in WRRO
• Malavasi M, Turri E, Atria JJ, Christensen H, Marxer R, Desideri L, Coy A, Tamburini F & Green P (2017) An Innovative Speech-Based User Interface for Smarthomes and IoT Solutions to Help People with Speech and Motor Disabilities. Studies in Health Technology and Informatics, 242, 306-313. View this article in WRRO
• Mirheidari B, Blackburn D, Harkness K, Walker T, Venneri A, Reuber M & Christensen H (2017) Toward the Automation of Diagnostic Conversation Analysis in Patients with Memory Complaints. Journal of Alzheimer's Disease, 58(2), 373-387. View this article in WRRO
• F Rudzicz JA (2015) Perspective on Speech and Language Interaction for Daily Assistive Technology: Introduction to Part 2 – Speaking and Reading Aids. ACM Transactions on Accessible Computing (TACCESS), 6.
• F O Portet JA (2015) Perspective on Speech and Language Interacton for Daily Assistive Technlogy: Introduction to the Special Issue Part 3. ACM Transactions on Accessible Computing (TACCESS), 7.
• H Christensen FP & Alexandersson J (2015) Perspective on Speech and Language Interaction for Daily Assistive Technology: Introduction to Part 1 of the Special Issue. ACM Transactions on Accessible Computing (TACCESS), 6.
• Ma N, Barker J, Christensen H & Green P (2012) A hearing-inspired approach for distant-microphone speech recognition in the presence of multiple sources. Computer Speech and Language.
• Barker J, Vincent E, Ma N, Christensen H & Green P (2012) The PASCAL CHiME speech separation and recognition challenge. Computer Speech and Language.
• Ma N, Barker J, Christensen H & Green P (2012) Combining speech fragment decoding and adaptive noise floor modeling. IEEE Transactions on Audio, Speech and Language Processing, 20(3), 818-827.
• Christensen H, Ma N, Wrigley SN & Barker J (2008) Improving source localisation in multi-source, reverberant conditions: exploiting local spectro-temporal location cues.. Abstract for Acoust. Soc. Am. mtg.
• Christensen H, Gotoh Y & Renals S (2008) A cascaded broadcast news highlighter. IEEE Transactions on Audio, Speech and Language Processing, 16(1), 151-161.
• Martínez D, LLeida E, Green P, Christensen H, Ortega A & Miguel A () Intelligibility assessment and speech recogniser word accuracy rate prediction for dysarthric speakers in a factor analysis subspace. Submitted to ACM Transactions on Accessible Computing (TACCESS).

Conference proceedings papers

• Xiong F, Barker J, Yue Z & Christensen H (2020) Source Domain Data Selection for Improved Transfer Learning Targeting Dysarthric Speech Recognition. ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 4 May 2020 - 8 May 2020. View this article in WRRO
• Yue Z, Xiong F, Christensen H & Barker J (2020) Exploring Appropriate Acoustic and Language Modelling Choices for Continuous Dysarthric Speech Recognition. ICASSP 2020 - 2020 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 4 May 2020 - 8 May 2020. View this article in WRRO
• Xiong F, Barker J & Christensen H (2019) Phonetic Analysis of Dysarthric Speech Tempo and Applications to Robust Personalised Dysarthric Speech Recognition. ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 12 May 2019 - 17 May 2019.
• Mirheidari B, Blackburn D, OrMalley R, Walker T, Venneri A, Reuber M & Christensen H (2019) Computational Cognitive Assessment: Investigating the Use of an Intelligent Virtual Agent for the Detection of Early Signs of Dementia. ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 12 May 2019 - 17 May 2019.
• AlSaleh MMS, Moore R, Christensen H & Arvaneh M (2019) Examining Temporal Variations in Recognizing Unspoken Words using EEG Signals. 2018 IEEE International Conference on Systems, Man, and Cybernetics (SMC), 7 October 2018 - 10 October 2018. View this article in WRRO
• AlSaleh M, Moore R, Christensen H & Arvaneh M (2018) Discriminating between Imagined Speech and Non-Speech Tasks using EEG. 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) (pp 1952-1955), 18 July 2018 - 21 July 2018. View this article in WRRO
• Coy A, Green P, Cunningham S, Christensen H, Atria JJ, Rudzicz F, Malavasi M & Desideri L (2018) Embedding speech technology into intelligent tutoring systems using the CloudCAST speech technology platform. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Vol. 10858 LNCS (pp 421-424)
• Al-Hameed S, Benaissa M & Christensen H (2017) Detecting and Predicting Alzheimer's Disease Severity in Longitudinal Acoustic Data. Proceedings of the International Conference on Bioinformatics Research and Applications 2017 - ICBRA 2017, 8 December 2017 - 10 December 2017.
• Blackburn D, Reuber M, Christensen H, Mayer I, Rutten C, Venneri A, chirs E & Mirheidari B (2017) An avatar to screen for cognitive impairment. Journal of the Neurological Sciences, Vol. 381 (pp 319-319)
• Mirheidari B, Blackburn DJ, Harkness K, Walker T, Venneri A, Reuber M & Christensen H (2017) An Avatar-based system for identifying individuals likely to develop dementia. Interspeech 2017 (pp 3147-3151) View this article in WRRO
• Cernak M, Nöth E, Rudzicz F, Christensen H, Orozco-Arroyave JR, Arora R, Bocklet T, Chinaei H, Hannink J, Nidadavolu PS , Vasquez JC et al (2017) On the impact of non-modal phonation on phonological features. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings (pp 5090-5094) View this article in WRRO
• Vasquez-Correa JC, Orozco-Arroyave JR, Arora R, Noth E, Dehak N, Christensen H, Rudzicz F, Bocklet T, Cernak M, Chinaei H , Hannink J et al (2017) Multi-view representation learning via gcca for multimodal analysis of Parkinson's disease. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings (pp 2966-2970) View this article in WRRO
• Cunningham S, Green P, Christensen H, Atria JJ, Coy A, Malavasi M, Desideri L & Rudzicz F (2017) Cloud-Based Speech Technology for Assistive Technology Applications (CloudCAST). Studies in Health Technology and Informatics, Vol. 242 (pp 322-329) View this article in WRRO
• Malavasi M, Turri E, Motolese MR, Marxer R, Farwer J, Christensen H, Desideri L, Tamburini F & Green P (2017) An Innovative Speech-Based Interface to Control AAL and IoT Solutions to Help People with Speech and Motor Disability (pp 269-278)
• AlSaleh MM, Arvaneh M, Christensen H & Moore RK (2016) Brain-computer interface technology for speech recognition: A review. 2016 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA), 13 December 2016 - 16 December 2016.
• Mirheidari B, Blackburn D, Reuber M, Walker T & Christensen H (2016) Diagnosing people with dementia using automatic conversation analysis. Proceedings of Interspeech 2016 (pp 1220-1224) View this article in WRRO
• Nicolao M, Christensen H, Cunningham S, Green P & Hain T (2016) A framework for collecting realistic recordings of dysarthric speech - The homeService corpus. Proceedings of the 10th International Conference on Language Resources and Evaluation, LREC 2016 (pp 1993-1997) View this article in WRRO
• Casanueva I, Hain T, Christensen H, Marxer R & Green P (2015) Knowledge transfer between speakers for personalised dialogue management. Proceedings of the 16th Annual Meeting of the Special Interest Group on Discourse and Dialogue, September 2015 - September 2015.
• Green P, Marxer R, Cunningham S, Christensen H, Rudzicz F, Yancheva M, Coy A, Malavasi M & Desideri L (2015) Remote Speech Technology for Speech Professionals - the CloudCAST initiative. Proceedings of SLPAT 2015: 6th Workshop on Speech and Language Processing for Assistive Technologies, September 2015 - September 2015.
• Christensen H, Nicolao M, Cunningham S, Green P, Deena S & Hain T (2015) Speech-enabled environmental control in an AAL setting for people with speech disorders: a case study. IET International Conference on Technologies for Active and Assisted Living (TechAAL)
• Christensen H, Casanueva I, Cunningham S, Green P & Hain T (2014) Automatic selection of speakers for improved acoustic modelling: recognition of disordered speech with sparse data. 2014 IEEE Spoken Language Technology Workshop (SLT), 7 December 2014 - 10 December 2014.
• Casanueva I, Christensen H, Hain T & Green P (2014) Adaptive speech recognition and dialogue management for users with speech disorders. Proceedings of Interspeech’14
• Christensen H, Green P & Hain T (2013) Learning speaker-specific pronunciations of disordered speech. 14TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION (INTERSPEECH 2013), VOLS 1-5 (pp 1158-1162)
• Christensen H, Aniol MB, Bell P, Green P, Hain T, King S & Swietojanski P (2013) Combining in-domain and out-of-domain speech data for automatic recognition of disordered speech. 14TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION (INTERSPEECH 2013), VOLS 1-5 (pp 3609-3612)
• Martinez D, Green P & Christensen H (2013) Dysarthria Intelligibility Assessment in a Factor Analysis Total Variability Space. 14TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION (INTERSPEECH 2013), VOLS 1-5 (pp 2132-2136)
• González DM, Green P & Christensen H (2013) Dysarthria Intelligibility Assessment in a Factor Analysis Total Variability Space. Interspeech’13
• Christensen H, Cunningham S, Green P & Hain T (2013) homeService: Voice-enabled assistive technology in the home using cloud-based automatic speech recognition. 4th Workshop on Speech and Language Processing for Assistive Technologies (SLPAT)
• Christensen H, Green P & Hain T (2013) Learning speaker-specific pronunciations of disordered speech. Interspeech’13
• Christensen H, Aniol MB, Bell P, Green P, Hain T, King S & Swietojanski P (2013) Combining in-domain and out-of-domain speech data for automatic recognition of disordered speech. Interspeech’13
• Fox C, Christensen H & Hain T (2012) Studio report: Linux audio for multi-speaker natural speech technology.. Proc. Linux Audio Conference
• Christensen H, Siddharth S, Neill PO, Clarke Z, Judge S, Cunningham S & Hawley M (2012) SPECS - an embedded platform, speech-driven environmental control system evaluated in a virtuous circle framework. In proc. Workshop on Innovation and Applications in Speech Technology
• Christensen H, Cunningham S, Fox C, Green P & Hain T (2012) A comparative study of adaptive, automatic recognition of disordered speech. 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012, Vol. 2 (pp 1774-1777)
• Ma N, Barker J, Christensen H & Green P (2011) Recent advances in fragment-based speech recognition in reverberant multisource environments.. Proceedings of ISCA Workshop on Machine Listening in Multisource Environments (pp 68-73)
• Ma N, Barker J, Christensen H & Green P (2011) Binaural cues for fragment-based speech recognition in reverberant multisource environments. Proceedings of INTERSPEECH 2011 (pp 1657-1660)
• Ma N, Barker J, Christensen H & Green P (2011) Incorporating localisation cues in a fragment decoding framework for distant binaural speech recognition.. IEEE Joint Workshop on Hands-Free Speech Communication and Microphone Arrays (HSCMA’11) (pp 207-212)
• Ma N, Barker J, Christensen H & Green P (2011) Binaural cues for fragment-based speech recognition in reverberant multisource environments. Proceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH (pp 1657-1660)
• Ma N, Barker J, Christensen H & Green P (2010) Distant microphone speech recognition in a noisy indoor environment: combining soft missing data and speech fragment decoding.. ISCA Tutorial and Research Workshop on Statistical And Perceptual Audition
• Christensen H & Barker J (2010) Speaker turn tracking with mobile microphones: Combining location and pitch information. European Signal Processing Conference (pp 954-958)
• Christensen H, Barker J, Ma N & Green P (2010) The CHiME corpus: A resource and a challenge for computational hearing in multisource environments. Proceedings of the 11th Annual Conference of the International Speech Communication Association, INTERSPEECH 2010 (pp 1918-1921)
• Christensen H & Barker J (2009) Using location cues to track speaker changes from mobile, binaural microphones. INTERSPEECH 2009: 10TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION 2009, VOLS 1-5 (pp 124-127)
• Christensen H, Ma N, Wrigley SN & Barker J (2009) A speech fragment approach to localising multiple speakers in reverberant environments. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings (pp 4593-4596)
• Arnaud E, Christensen H, Lu Y-C, Barker J, Khalidov V, Hansard ME, Holveck B, Mathieu H, Narasimha R, Taillant E , Forbes F et al (2008) The CAVA corpus: synchronised stereoscopic and binaural datasets with head movements.. ICMI (pp 109-116)
• Christensen H, Ma N, Wrigley SN & Barker J (2007) Integrating pitch and localisation cues at a speech fragment level. International Speech Communication Association - 8th Annual Conference of the International Speech Communication Association, Interspeech 2007, Vol. 4 (pp 2752-2755)
• Lu YC, Cooke M & Christensen H (2007) Active binaural distance estimation for dynamic sources. Proceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH, Vol. 2 (pp 933-936)
• Christensen H, Kolluru BK, Gotoh Y & Renals S (2005) Maximum entropy segmentation of broadcast news. 2005 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS 1-5 (pp 1029-1032)
• Kolluru BK, Christensen H & Gotoh Y (2005) Multi-stage compaction approach to broadcast news summarisation. 9th European Conference on Speech Communication and Technology (pp 69-72)
• Christensen H, Lindberg B & Andersen O (2005) INTRODUCING PHONETICALLY MOTIVATED, HETEROGENEOUS INFORMATION INTO AUTOMATIC SPEECH RECOGNITION. INTEGRATION OF PHONETIC KNOWLEDGE IN SPEECH TECHNOLOGY, Vol. 25 (pp 67-86)
• Christensen H, Kolluru B, Gotoh Y & Renais S (2004) From text summarisation to style-specific summarisation for broadcast news. Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), Vol. 2997 (pp 223-237)
• Christensen H, Gotoh Y, Kolluru B & Renals S (2003) Are extractive text summarisation techniques portable to broadcast news?. ASRU'03: 2003 IEEE WORKSHOP ON AUTOMATIC SPEECH RECOGNITION AND UNDERSTANDING ASRU '03 (pp 489-494)
• Kolluru B, Christensen H, Gotoh Y & Renals S (2003) Exploring the style-technique interaction in extractive summarization of broadcast news. ASRU'03: 2003 IEEE WORKSHOP ON AUTOMATIC SPEECH RECOGNITION AND UNDERSTANDING ASRU '03 (pp 495-500)
• Christensen H, Gotoh Y & Renals S (2001) Punctuation Annotation Using Statistical Prosody Models. Proceedings of the ISCA Workshop on Prosody in Speech Recognition and Understanding (pp 35-40)
• Christensen H, Lindberg B & Andersen O (2001) Introducing Phonetically Motivated Information into ASR. Proceedings of Eurospeech 2001
• Christensen H, Lindberg B & Andersen O (2000) Employing Heterogeneous Information in a Multi-Stream Framework. Proceedings of ICASSP 2000
• Christensen H, Lindberg B & Andersen O (2000) Noise robustness of heterogeneous features employing minimum classification error feature space transformations.. INTERSPEECH (pp 534-537)
• Pan Y, Mirheidari B, Reuber M, Venneri A, Blackburn D & Christensen H () Automatic Hierarchical Attention Neural Network for Detecting AD. Interspeech 2019
• Mirheidari B, Blackburn D, Walker T, Venneri A, Reuber M & Christensen H () Detecting Signs of Dementia Using Word Vector Representations. Interspeech 2018
• Al-Hameed S, Benaissa M & Christensen H () Simple and robust audio-based detection of biomarkers for Alzheimer's disease. SLPAT 2016 Workshop on Speech and Language Processing for Assistive Technologies
• Green P, Marxer R, Cunningham S, Christensen H, Rudzicz F, Yancheva M, Coy A, Malavasi M, Desideri L & Tamburini F () CloudCAST — Remote Speech Technology for Speech Professionals. Interspeech 2016
• Yue Z, Christensen H & Barker J () Autoencoder bottleneck features with multi-task optimisation for improved continuous dysarthric speech recognition. Proceedings of the Annual Conference of the International Speech Communication Association, INTERSPEECH View this article in WRRO
• Alhinti L, Christensen H & Cunningham S () Towards the Understanding of Communicating Emotions for People with Dysarthria. Workshop in Speech and Hearing Disorders (WSPD 2018)

Reports

• Christensen H & Barker J (2008) Inferring perceiver actions from binaural data
• Khalidov V, Lu Y-C, Holveck B, Taillant E, Arnaud E, Barker J, Christensen H & Mathieu H (2007) Synchronized stereoscopic and binaural dataset with head movements : Recording details

Theses / Dissertations

• Christensen H (2002) Speech Recognition using Heterogenous Information Extraction in Multi-Stream Based Systems.
• Christensen H (1996) Speaker Adaptation of Hidden Markov Models using Maximum Likelihood Linear Regression.

Working papers

• Pan Y, Mirheidari B, Reuber M, Venneri A, Blackburn D & Christensen H (2019) Automatic Hierarchical Attention Neural Network for Detecting AD.

Datasets

• Nicolao M, Hain T, Christensen H, Green P & Cunningham S The homeService corpus v1.0.

Other

• Christensen H & Barker J (2009) Simultaneous Tracking of Perceiver Movements and Speaker Changes Using Head-Centered, Binaural Data.
• Christensen H, Barker J, Lu Y-C, Xavier J, Caseiro R & Araújo H (2009) POPeye: Real-time, binaural sound source localisation on an audio-visual robot-head.