Inverse Glottal Filtering using a Parameterized Input Model
1989 (English)In: Signal Processing, ISSN 0165-1684, E-ISSN 1872-7557, Vol. 18, no 4, 435-445 p.Article in journal (Refereed) Published
In this paper computational algorithms for inverse glottal filtering are studied. The objective of inverse glottal filtering is to estimate the driving source. A good model for the glottal pulse is useful for, e.g., speech synthesis, speech recognition and speaker diagnostics. One common approach is to use a parameterized model of the input signal, i.e., the glottal pulses. The algorithm presented enables simultaneous estimation of the parameters of the input signal and the parameters of the system transfer function, the vocal tract model. The presentation here is restricted to transfer functions of all-pole type, i.e., AR-models. The method can be extended to handle zeros in the transfer function. The computational burden would, however, increase significantly. The algorithm uses efficient numerical methods, as, for instance, QR-factorization through Householder transformations.
Place, publisher, year, edition, pages
Elsevier, 1989. Vol. 18, no 4, 435-445 p.
Speech coding, Input estimation, Parameterized input model, Numerical optimization
IdentifiersURN: urn:nbn:se:liu:diva-100420DOI: 10.1016/0165-1684(89)90085-6OAI: oai:DiVA.org:liu-100420DiVA: diva2:662442