METHOD AND DEVICE TO DETERMINE A DESCRIPTOR FOR A SIGNAL REPRESENTING A MULTIMEDIA ITEM, DEVICE FOR RETRIEVING ITEMS IN A DATABASE, DEVICE FOR CLASSIFICATION OF MULTIMEDIA ITEMS IN A DATABASE

摘要

- applying (S2) to said signal a second bank of filters in order to obtain a second set of coefficients representing the low-pass filtered signal, - calculating (S3) a descriptor representing said multimedia element by making the difference between said first set of coefficients and said second set of coefficients and - calculating (S4) associated power of said difference. Application to the classification and retrieval of multimedia items.