| 摘要 |
A voice compression apparatus for use in telephony comprises a device for decomposing a voice signal into a bank of narrow frequency band signals, an estimator for estimating the instantaneous energy in each band, a comparator for comparing the energy in each band to of all other bands to estimate the audibility threshold of the signal in each band, and a device for independently quantizing the signal in each band on the basis of the estimated audibility threshold. The inventive apparatus offers low processing delays and reduced computational requirements, and is suitable for use in telecommunications networks. |
