Method and device for providing adaptation parameters to a decoder

摘要

Decoding a bit stream representative of video data comprising decoding an encoded image obtained using at least two different encoding processes and in which the encoded image includes a bit stream portion corresponding to a set of coding units. In the case where a parameter set comprising a set of characteristics of one of the used encoding processes (such as an Adaptation Parameter Set , APS) is relevant, the bit stream portion will include an identifier providing a reference to the relevant parameter set. This identifier may be provided in the slice header. The decoder will obtain a set of characteristics for each active encoding process of the encoding processes 1004 and decode the image in using the obtained characteristics 1005. Also disclosed is an encoder in which the bit stream portion is provided with an identifier giving a reference to a relevant parameter set corresponding to the relevant encoding process. The invention relates to the new HEVC (High Efficiency Video Coding) Standard and is devised to overcome the problem of redundancies that can be introduced between APSs when there are frequent modifications of the filtering parameters during a sequence.