Patent ID: 7046173
Filing Date: 2006-05-16
Classification: H03L,H03M

Abstract:
1. A method for converting a digital input value quantized according to a first quantization coefficient and encoded over at most n1 bits, into a digital output value quantized according to a second quantization coefficient and encoded over at most n2 bits, where n1 and n2 are nonzero integers, comprising the steps of: multiplying the digital input value by an integer B encoded over at most β bits, where β is a nonzero integer, so as to generate a first intermediate digital value encoded over at most n1+β bits; and fixed-point dividing said first intermediate digital value by a number 2 wherein a number is substantially equal to the ratio of said second quantization coefficient to said first quantization coefficient; and wherein the step of fixed point dividing is carried out by means of a sigma-delta modulator.