A method for obtaining information on the residual error in a transmitted channel decoded digital signal

摘要

In the case of picture transmission via mobile-radio channels, provision is made that reliability information L k is obtained during the channel decoding of the transmitted signal, in that the reliability information is short-term averaged 4, that the short-term averaged reliability information is mapped onto residual errors 7, that the quantity obtained by the mapping is compared with at least one decision threshold 9, and in that the result of the comparison is outputted as residual error information QP. In addition, the reliability information can be long-term averaged 5, the quantity obtained by the mapping being modified 8 with the long-term averaged reliability information.