EP 0537948 A2 19930421 - Method and apparatus for smoothing pitch-cycle waveforms.
Title (en)
Method and apparatus for smoothing pitch-cycle waveforms.
Title (de)
Verfahren und Vorrichtung zur Glättung von Grundperiodewellenformen.
Title (fr)
Méthode et appareil pour le lissage des formes d'onde de la période fondamentale.
Publication
Application
Priority
US 77856091 A 19911018
Abstract (en)
A method and apparatus for processing a reconstructed speech signal from an analysis-by-synthesis decoder are provided to improve the quality of reconstructed speech. By operation of the invention, one or more traces in a reconstructed speech signal are identified. Traces are sequences of like-features in the reconstructed speech signal. The like-features are identified by time-distance data received from the long term predictor of the decoder. The identified traces are smoothed by one of the known smoothing techniques. A smoothed version of the reconstructed speech signal is formed by combining one or more of the smoothed traces. The original reconstructed speech signal may be that provided by a long term predictor of the decoder. Values of the reconstructed speech signal and smoothed speech signal may be combined based on a measure of periodicity in speech. <IMAGE>
IPC 1-7
IPC 8 full level
G10L 11/04 (2006.01); G10L 19/04 (2006.01); G10L 19/08 (2006.01)
CPC (source: EP)
G10L 19/08 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0537948 A2 19930421; EP 0537948 A3 19930623; EP 0537948 B1 19970903; DE 69221985 D1 19971009; DE 69221985 T2 19980108; ES 2104842 T3 19971016; JP 3798433 B2 20060719; JP H05224698 A 19930903
DOCDB simple family (application)
EP 92309167 A 19921008; DE 69221985 T 19921008; ES 92309167 T 19921008; JP 27759292 A 19921016