Patent ID: 8233532

Claim:
Apparatus for error correcting an information signal being scalable so that portions of the information signal represent an information content at different levels of quality, wherein at least a first one of the plurality of portions representing the information content at a first one of the different levels higher than a second one of the different levels at which a second one of the plurality of portions represents the information content, overlaps with the second portion, wherein the information signal is FEC protected by each of the different levels having redundancy information associated therewith such that each redundancy information is dependent on the respective portion representing the information content at the respective level, and the redundancy information associated with the first level is dependent on the first portion including a part thereof overlapping the second portion, the apparatus comprising: corrector for correcting an error of the information signal within the second portion by use of the redundancy information associated with the first and second levels and a part of the first portion disjoint to the second portion; and deriver for deriving the information content at the second level of quality from the error corrected second portion with discarding the part of the first portion; wherein the information signal is scalable in a plurality of dimensions so that portions of the information signal represent information content at different constellations of respective levels of the plurality of dimensions, wherein the first one of the plurality of portions representing the information content at a level of a first one of the plurality of dimensions higher than a level in the first dimension at which the second one of the plurality of portions represents the information content, overlaps with the second portion, wherein at least a third one of the plurality of portions being different from the first portion and representing the information content at a level of a second one of the plurality of dimensions higher than a level in the second dimensions at which a fourth one of the plurality of portions represents the information content, overlaps with the fourth portion, wherein the information signal is FEC protected by each of the different constellations having redundancy information associated therewith such that each redundancy information is dependent on the respective portion representing the information content at the respective constellation, the redundancy information associated with the constellation at which the first portion represents the information content is dependent on the first portion including a part of the first portion overlapping the second portion, and the redundancy information associated with the constellation at which the third portion represents the information content is dependent on the third portion including a part thereof overlapping the fourth portion.