Patent ID: 7428684

Claim:
A device for concealing an error in an erroneous or potentially erroneous information unit, the device comprising: a forward-decoder for forward-decoding a block of reversible code words of variable lengths which represent a block of information units, the block of code words having a starting point and an end point, the forward-decoder being configured to decode the block in the direction of the end point, starting from the starting point; a backward-decoder for backward-decoding the block of code words, starting from the end point, in the direction of the starting point; a determinator for determining an error-concealment area, the error-concealment area being given by the forward-decoder providing a decoded forward-decoding value for the information unit, and the backward-decoder providing a decoded backward-decoding value for the information unit, the forward-decoding value and the backward-decoding value deviating from one another for one and the same information unit; and a selector for selecting the forward-decoding value or the backward-decoding value as an information unit, depending on which value meets a predetermined criterion, so that an error or a potential error in the information unit is concealed.