In order to decode a received digital signal which has been watermarked with a known watermark, at least part of the digital signal is decoded by using a parametrisable iterative decoder, the watermark is extracted from the decoded signal, the extracted watermark is compared with the known watermark, and at least one parameter of the decoder is modified if necessary, according to the result of the comparison.


< Image sensing apparatus, method, memory involving differential compression of display region based on zoom operation or speed

< Image forming apparatus utilizing T.33 protocol to include both extensions and secondary phone numbers

> Image forming apparatus with toner amount selection feature

> Image forming apparatus

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