DEVICE AND METHOD FOR PRODUCING A SCALED DATA FLOW

摘要

The invention relates to a device for producing a scaled data flow from a group of temporally successive images with a first local resolution. Said device comprises a unit (1002) for converting the images with a first local resolution into images with a second local resolution that is smaller than the first. The images with the second resolution are encoded (1004) in order to obtain a first scaling layer (1006). An auxiliary representation is produced from the images with the second resolution, said representation having a third resolution that is larger than the second resolution and smaller than, or the same as, the first resolution. The auxiliary representation is used to predict intrablocks in the second scaling layer. A version of the temporally successive images with the third resolution is then filtered, predicted and encoded (1016), for example, using a temporal wavelet subband decomposition, in order to obtain a second scaling layer. In this way, a flexible, local scalable concept is provided, that represents an extension of the H.264/AVC standard and especially uses a maximum number of standardised modules.