Abstract: At least a method and an apparatus are presented for efficiently processing film grain while encoding or decoding video. For example, the method comprises receiving film grain information that comprises at least one parameter that specifies an attribute of the film grain associated with an image block; applying a transform to a block of random values; filtering the transformed block, the filtering being defined by at least one parameter in the received film grain information; applying a respective inverse transform to the filtered transformed block to generate a block of pixels with film grain pattern for the image block. Advantageously, the transform is a core transform of a video coding standard, for instance one of DCT-II, DCT-VIII, DST-VII.

Abstract: A method comprising signaling (102) in a data structure metadata representative of an energy consumption induced by encoding tools and/or features implemented to obtain a video stream representative of a sequence of pictures; and, associating (103) the data structure to the video stream for at least one subset of pictures representative of a period of the video stream; wherein at least one encoding tool or feature is associated to an information representative of an energy consumption depending on: a single reference picture size defined for the sequence of pictures; or, a total number of blocks of a given size in pictures signaled in the metadata for the at least one subset of pictures; or, a number of samples per square and rectangular blocks