Patent ID: 8537047

Claim:
A requantization device comprising: an input for receiving, in a first period of time, a first word encoded in a first whole number of bits; a first truncation unit for requantization, at a given quantization step size, of the first word into a second word in a second whole number of bits that is strictly less than the first whole number; a second truncation unit for determining a third number equal to the value of a fourth number of least significant bits of the first word, with the fourth number being equal to the difference between the first whole number and the second whole number; an output for outputting, during a fourth number of periods following the first period of time, a sequence of third words each equal to the second word for the current period of time, with the sequence comprising a first group comprising a number of third words that is equal to the third number and a second group of third words distinct from the first group; and a correction unit configured to: add a least significant bit to the third words of the first group before outputting the third words; add or subtract least significant bits to/from the third words of the second group before outputting the third words, such that the sum of the least significant bits added to and subtracted from the third words of the second group is zero.