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@ARTICLE{Garner_SPL_2012,
                      author = {Garner, Philip N. and Cernak, Milos and Motlicek, Petr},
                    projects = {Idiap, RECOD},
                       month = jan,
                       title = {A Simple Continuous Pitch Estimation Algorithm},
                     journal = {IEEE Signal Processing Letters},
                      volume = {20},
                      number = {1},
                        year = {2013},
                       pages = {102--105},
                         url = {https://www.idiap.ch/paper/2417/},
                    abstract = {Recent work in text to speech synthesis has pointed to the benefit
  of using a continuous pitch estimate; that is, one that records
  pitch even when voicing is not present.  Such an approach typically
  requires interpolation.  The purpose of this paper is to show that a
  continuous pitch estimation is available from a combination of
  otherwise well known techniques.  Further, in the case of an
  autocorrelation based estimate, the continuous requirement negates
  the need for other heuristics to correct for common errors.  An
  algorithm is suggested, illustrated, and demonstrated using a
  parametric vocoder.},
                         pdf = {https://publications.idiap.ch/attachments/papers/2012/Garner_SPL_2012.pdf}
}