METHOD AND APPARATUS FOR CONCEALING ERRORS IN REPRODUCED DIGITAL SIGNALS UTILIZING FIR FILTER

A finite impulse response filter is used for providing substitute sample values for erroneous sample values and isolated erroneous sample values appear. When sample values needed for contributing to the concealment of an erroneous value by the filter are also marked as erroneous, they are replaced by the corresponding sample value in the preceding television line, as represented by the output of the FIR filter, delayed by one line. In the case of the first line, the last error-free sample value in the same line, or an average of neighboring sample values, is used as an auxiliary value for calculation of a replacement value in the FIR filter.