1. A computer-implemented method comprising: receiving a stream representative of at least one coded image; identifying, from the stream, a predetermined plurality of groups of blocks; providing each group of blocks to a first decoding unit; and processing, by the first decoding unit, a first block in a given group of blocks, wherein the processing of the first block comprises: determining that the first block is first in an order of blocks in the given group of blocks; in response to determining that the first block is first in the order of blocks in the given group of blocks, retrieving a first set of probability data from a buffer, wherein the first set of probability data comprises a first set of probabilities of occurrence of symbols associated with a block that is situated immediately adjacent to the first block and that belongs to another group of blocks that is different from the given group of blocks in the predetermined plurality of groups of blocks; entropy decoding the first block based on the first set of probability data; and processing, by the first decoding unit, a second block in the given group of blocks, wherein the processing of the second block comprises: determining that the second block is not first in the order of blocks in the given group of blocks; in response to determining that the second block is not first in the order of blocks in the given group of blocks, retrieving a second set of probability data from a memory unit, wherein the second set of probability data comprises a second set of probabilities of occurrence of symbols associated with at least one other already decoded block belonging to the given group of blocks in the predetermined plurality of groups of blocks, wherein the second set of probabilities of occurrence of symbols are not associated with blocks that do not belong to the given subset of blocks; and entropy decoding the second block based on the second set of probability data.