Patent ID: 8787441

Claim:
Device for coding video data comprising means to code a video stream as groups of pictures, each group of pictures comprising a unit of a first type, at least one unit of a second type and a plurality of units of a fourth type, wherein said unit of the first type comprises at least one message, wherein said at least one unit of the second type is at least one description unit comprising parameters relative to coding of said group of pictures, wherein said plurality of units of the fourth type comprise data relative to the coded group of pictures, and wherein said device comprises: means to insert in the stream of data, before said at least one description unit of a current group of pictures, in said unit of the first type, said at least one message, wherein the at least one message indicates whether said parameters relative to the current group of pictures included in the at least one description unit of the current group of pictures are identical to parameters relative to a temporally preceding group of pictures included in a corresponding preceding description unit.