| 摘要 |
<p>A method of concealing errors in a digital television signal, which television signal comprises a plurality of component sample values corresponding respectively to sample positions along a horizontal scan line of a television picture made up of a plurality of scan lines, comprises, in respect of each sample value which is in error, calculating a first concealment accuracy by determining the difference between two immediately adjacent sample values both in the scan line immediately preceding or following the scan line which the error sample is in, an one of which sample values is immediately adjacent to the error sample, calculating a second concealment accuracy by determining the difference between two immediately adjacent sample values both in the vertical line immediately preceding or following the vertical line which the error sample is in, and one of which sample values is immediately adjacent to the error sample, selecting from the available concealment accuracies a preferred direction of the television picture for concealing the error sample, calculating a corrected value of the error sample using available sample values disposed along the preferred direction, and substituting the corrected sample value for the error sample so as to conceal the error.</p> |
