G - Physics – 10 – L
Patent
G - Physics
10
L
354/67
G10L 19/00 (2006.01) G10L 19/02 (2006.01) G10L 19/08 (2006.01) G10L 19/10 (2006.01) H04B 1/66 (2006.01)
Patent
CA 2016042
A method of and apparatus for coding wide-band audio signals are provided, wherein the band of the signal to be coded is split into two sub-bands; the signals in each sub-band are coded in coders (CD1, CD2) operating according to analysis-by-synthesis techniques and exploiting short-term and long-term correlations in the speech signal. Two embodiments of such coders are described, the first utilizing a multi-pulse excitation and the other the CELP coding technique.
Méthode et appareil de codage de signaux audio à large bande : la bande du signal à coder est partagée en deux sous-bandes; les signaux de chaque sous-bande sont codés dans des codeurs (CD1 et CD2) fonctionnant selon des techniques d'analyse-par-synthèse et exploitant les corrélations à court terme et à long terme du signal vocal. Deux versions de ces codeurs sont présentées, la première utilisant une excitation multi-impulsionnelle et l'autre la technique de codage CELP.
Montagna Roberto
Omologo Maurizio
Sereno Daniele
Ridout & Maybee Llp
Telecom Italia Lab S.p.a.
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