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@TECHREPORT{Janbakhshi_Idiap-RR-08-2021,
                      author = {Janbakhshi, Parvaneh and Kodrasi, Ina},
                    projects = {Idiap, MOSPEEDI},
                       month = {7},
                       title = {Supervised Speech Representation Learning for Parkinson's Disease Classification},
                        type = {Idiap-RR},
                      number = {Idiap-RR-08-2021},
                        year = {2021},
                 institution = {Idiap},
                        note = {accepted in ITG Conference on Speech Communication},
                    abstract = {Recently proposed automatic pathological speech classification techniques use unsupervised auto-encoders to obtain a high-level abstract representation of speech.
Since these representations are learned based on reconstructing the input, there is no guarantee that they are robust to pathology-unrelated cues such as speaker identity information.
Further, these representations are not necessarily discriminative for pathology detection.  
In this paper, we exploit supervised auto-encoders to extract robust and discriminative speech representations for Parkinson's disease classification.
To reduce the influence of speaker variabilities unrelated to pathology, we propose to obtain speaker identity-invariant representations by adversarial training of an auto-encoder and a speaker identification task.
To obtain a discriminative representation, we propose to jointly train an auto-encoder and a pathological speech classifier.
Experimental results on a Spanish database show that the proposed supervised representation learning methods yield more robust and discriminative representations for automatically classifying Parkinson's disease speech, outperforming the baseline unsupervised representation learning system.},
                         pdf = {https://publications.idiap.ch/attachments/reports/2021/Janbakhshi_Idiap-RR-08-2021.pdf}
}