Pitch prediction filters in speech coding

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Prediction error filters which combine short-time prediction (formant prediction) with long-time prediction (pitch prediction) in a cascade connection are examined. A number of different solution methods (autocorrelation, covariance, Burg) and implementations (transversal and lattice) are considered. It is found that the F-P cascade (formant filter before the pitch filter) outperforms the P-F cascade for both transversal- and lattice-structured predictors. The performances of the transversal and lattice forms are similar. The solution method that yields a transversal structure requires a stability test and, if necessary, a consequent stabilization. The two cascade forms are implemented as part of an APC coder to evaluate their relative subjective performance.

Original languageEnglish (US)
Pages (from-to)467-478
Number of pages12
JournalIEEE Transactions on Acoustics, Speech, and Signal Processing
Issue numbern
StatePublished - Jan 1 1992
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Signal Processing


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