FIELD: physics, computer engineering.
SUBSTANCE: invention relates to means of updating the processing unit of an encoder or decoder for using modulated transforms having a size greater than a predetermined size. The method includes storing an initial prototype filter characterised by an ordered set of initial size coefficients; providing a step for constructing a prototype filter of a size greater than the initial size to implement the modulated transform of a greater size by inserting at least one coefficient between two consecutive coefficients of the initial prototype filter.
EFFECT: reducing the size of memory required for the encoding-decoding process.
10 cl, 8 dwg
