Methods and devices for encoding and decoding a data stream representing at least one image that disables post-processing of reconstructed block based on prediction mode
地域：
Issy-les-Moulineaux
摘要
A method for decoding a data stream representative of an image split into blocks. For a current block of the image, an item of information indicating a coding mode among a first and a second coding mode of the current block is decoded from the data stream and the current block is decoded depending on this information. When the coding mode of the current block corresponds to the second coding mode, the current block is reconstructed from a prediction obtained, for each pixel, from another previously decoded pixel belonging to the current block or to a previously decoded block of the image, and from a decoded residue associated with the pixel. At least one processing method is applied to the reconstructed current block for at least one pixel of the current block depending on the coding mode of the current block and/or the coding mode of the neighbouring blocks.
說(shuō)明書
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According to a particular embodiment of the invention, the processing method is a deblocking filtering applied to the pixels of the reconstructed current block that are located at the boundary of the reconstructed current block with a reconstructed neighbouring block in the image. According to this particular embodiment of the invention, the processing method corresponds to a “deblocking” filter conventionally applied at block boundaries to reduce the effects of discontinuities between blocks.
According to a particular embodiment of the invention:
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- when the current block is decoded or coded according to the second coding mode:
- the application of the deblocking filtering to the reconstructed current block is disabled for all the pixels of the reconstructed current block,
- when the current block is decoded or coded according to a coding mode distinct from the second coding mode:
- the deblocking filtering is applied to a pixel of the reconstructed current block if said pixel is located on a boundary of said reconstructed current block with a neighbouring reconstructed block in the image and if said neighbouring block is decoded or coded according to a coding mode distinct from the second coding mode.
- when the current block is decoded or coded according to the second coding mode:
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