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US 11,451,777 B2Granted
Method for encoding a digital image, decoding method, devices, and associated computer programs
AssigneeB<>Com
InventorPierrick Philippe
Life of this patent
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AssigneeB<>Com
InventorPierrick Philippe
Estimating the term…
Encoding a digital image divided into a plurality of blocks of pixels processed in a defined order, including the following steps, implemented for a current block, with preset sizes: predicting values of the current block from at least one block previously processed; calculating a residual block by subtracting the predicted values from the original values of the current block; obtaining a residual block by applying a transform to pixels of the residual block, said transformed residual block comprising coefficients; encoding the transformed residual block; calculating at least one characteristic representative of at least one transformed residual coefficient of the current block; determining initial identification data representative of a sub-list of at least one transform associated with said at least one calculated characteristic; and verifying that the transform applied to the current block is part of the sub-list identified by the initial data.
A method for decoding a picture from a bitstream comprising encoded values of coefficients of transformed residual blocks representative of said picture, said method comprising the following, implemented by a decoding device for a current transformed residual block:
A device for decoding a picture from a bitstream comprising encoded values of coefficients of transformed residual blocks representative of said picture, wherein the device comprises:
At least one non-transitory computer-readable medium comprising a computer program stored thereon comprising instructions for implementing a method for decoding a picture from a bitstream, when executed by a processor of a decoding device, said bitstream comprising encoded values of coefficients of transformed residual blocks representative of said picture, said method comprising the following, implemented for a current transformed residual block:
Dependencies are inferred from the claim text.