Threshold control quantization method of determining the order of the audio signal

摘要

PURPOSE: To obtain the threshold value control quantization determining method for the audio signal which performs bit allocation at low cost while holding the quantity of a recomposed signal excellent. ;CONSTITUTION: A filter bank 101 generates a subband sample from an input audio signal, and a maximum value is found from the subband sample, and quantized by a 1st quantizing means 103. In a process wherein the quantized maximum value is normalized and quantized by a 2nd quantizing means 108, the mean energy of the subband is calculated 110, a division coefficient is found 111 by specific arithmetic on the basis of the mean energy, and 2nd quantization is performed according to the division coefficient.;COPYRIGHT: (C)1994,JPO