Codage de la parole a bas et tres bas debits

RésuméCet article présente les principales techniques de codage de parole à bas et très bas debits, de 50 bit/s à 4 000 bit/s. Puis il présente en détail la méthode hsx pour le codage à 1200 bit/s et une nouvelle approche segmentale utilisant des unités acoustiques obtenues de manière non supervisée pour des débits inférieurs à 400 bit/s.AbstractThis paper reviews the main algorithms for speech coding at low and very low bit rates, from 50 bps to 4 000 bps. Then the hsx technique for coding at 1200 bps and a new segmental method with automatically derived units for very low bit rate coding are presented in details.

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