Systems, methods, and apparatus for gain factor limiting

Details Systems, methods, and apparatus for gain factor limiting Systems, methods, and apparatus for gain factor limiting

G - Physics

10

L

G10L 21/02 (2006.01)

Patent

CA 2657910

The range of disclosed configurations includes methods in which subbands of a speech signal are separately encoded, with the excitation of a first subband being derived from a second subband. Gain factors are calculated to indicate a time-varying relation between envelopes of the original first subband and of the synthesized first subband. The gain factors are quantized, and quantized values that exceed the pre-quantized values are re-coded.

La présente invention concerne des procédés dans lesquels des sous-bandes de signal vocal sont codées séparément, l'excitation d'une première sous-bande étant dérivée d'une seconde sous-bande. Des gains de facteur sont calculés afin d'indiquer une relation variant dans le temps entre les enveloppes de la première sous-bande originale et la première sous-bande synthétisée. Les facteurs de gain sont quantifiés et les valeurs quantifiées qui dépassent les valeurs préquantifiées sont recodées.

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