Rate loop processor for perceptual encoder/decoder

Details Rate loop processor for perceptual encoder/decoder Rate loop processor for perceptual encoder/decoder

H - Electricity

04

S

H04S 1/00 (2006.01) H04B 1/66 (2006.01) G10L 7/00 (1995.01) G10L 3/02 (1995.01)

Patent

CA 2090160

In a perceptual audio coder, a method and apparatus for quantizing audio signals is disclosed which advantageously produces a quantized audio signal which can be encoded within an acceptable range. Advantageously, the quantizer uses a scale factor which is interpolated between a threshold based on the calculated threshold of hearing at a given frequency and the absolute threshold of hearing at the same frequency.

L'invention est constituée par une méthode et un dispositif de quantification de signaux audio pour codeur audio perceptif qui produisent des signaux audio quantifiés pouvant être codés dans une gamme acceptable. Le quantificateur de l'invention utilise un facteur de proportionnalité qui est interpolé entre un seuil basé sur le seuil d'audition calculé à une fréquence donnée et sur le seuil d'audition absolu à cette même fréquence.

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