METHOD AND DEVICE FOR MINIMISING A QUANTISATION ERROR

摘要

The invention relates to a method and a device for minimising a quantisation error in the inverse quantisation of a quantised coefficient during a compression method, said quantisation error describing a difference between the quantised coefficient after inverse quantisation and an associated coefficient prior to quantisation. According to said method, at least one parameter that is characteristic of the compression of the quantised coefficient is selected, (at least two characteristic parameters being selected if one of the two characteristic parameters corresponds to a temporal prediction mode), a correction value is chosen based on the selected characteristic parameter(s) and inverse quantisation takes place after the correction value has been added to the quantised coefficient.