Patent ID: 6735252
Filing Date: 2004-05-11
Classification: G10L,G11B,H04B

Abstract:
An encoding apparatus for highly efficiently encoding an input digital signal, comprising:band dividing means for dividing the input digital signal into a plurality of frequency band components; encoding means for block-segmenting a sequence of samples arranged in a time-base direction and/or a frequency-base direction of the input digital signal divided in the plurality of frequency band components and encoding each block; normalization processing means for normalizing a signal component of each block encoded by said encoding means and generating normalization signal; quantization coefficient calculating means for calculating quantization coefficients that represent a feature of the signal component of each block; bit allocating means for deciding the number of allocated bits for each block corresponding to the quantization coefficients calculated by said quantization coefficient calculating means; normalization information changing means for gradually changing the normalization information generated by said normalization processing means corresponding to a user's operation on a time base; and encoded data generating means for re-quantizing the signal component of each block corresponding to the normalization information changed by said normalization information changing means and the number of allocated bits allocated by said bit allocating means and generating encoded data corresponding to a predetermined format.