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US 8,787,441 B2Granted
Device and method for coding and decoding video data and data train
AssigneeThomson Licensing
InventorsFrédéric Pasquier, Sylvain Fabre, Bruno Garnier
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AssigneeThomson Licensing
InventorsFrédéric Pasquier, Sylvain Fabre, Bruno Garnier
Estimating the term…
The invention relates to a device for coding video data comprising means to code a video stream as groups of pictures, each group of pictures comprising at least one description unit relevant to the coding of the said group of pictures. According to the invention, the coding device comprises means to insert in the stream of data at least one message indicating whether the description unit of the current group of pictures is identical to the description unit relevant to the preceding group of pictures. The invention also relates to a device for decoding video data comprising means to decode a stream of data coded with a device according to one of the preceding claims. According to the invention, the decoding device comprises means to analyze the said messages, means to decode the at least one next description unit if the said message indicates that this unit is different from the preceding description unit, otherwise, if it is identical, not to decode it.
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:
Method for coding video data coding a stream of pictures 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 the said group of pictures, wherein said plurality of units of the fourth type comprise data relative to the coded group of pictures, and wherein the method comprises a step of insertion into the stream of data, before said at least one description unit in said unit of the first type of a current group of pictures, of the at least one message, wherein said at least one message indicates whether the parameters relative to the current group of pictures included in the description unit of the current group of pictures are identical to the parameters relative to a temporally preceding group of pictures included in a corresponding preceding description unit.
A non-transitory signal medium comprising a digital data train stored on the medium, said digital data train including digital data groups, each group 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 a message, wherein said at least one unit of the second type is at least one description unit comprising parameters relative to coding of the said group of pictures, wherein said plurality of units of the fourth type comprise data relative to the coded group of pictures, and wherein the message of said unit of the first type indicates whether the at least one description unit is identical or different from the at least one description unit of a temporally preceding group.
Dependencies are inferred from the claim text.