| 摘要 |
A method for decoding comprising the following steps: receiving a first codeword comprising a plurality of elements of a first finite commutative group and associated to a plurality of symbols in accordance with a first code defining codeword elements by respective summations in said first commutative group; determining, by applying a projection onto elements of the first codeword, a second codeword comprising a plurality of elements of a second finite commutative group having a cardinal strictly smaller than the cardinal of the first finite commutative group, wherein the projection is a morphism from the first finite commutative group to the second finite commutative group; decoding the second codeword in accordance with a second code defining codeword elements by respective summations in said second commutative group. The second code word is derived in the situation where a decoder is unable to decode the first codeword. The information codeword may be representative of a data included in a video enhancement layer. |
