| 摘要 |
In a recording apparatus for video signals, adjacent pixels in input image signals are collected as blocks and subjected to orthogonal transformation. Then, the dc component, control data, ac components, end-of-block signal and the like in a block after orthogonal transformation are coded and the codewords are arranged in prescribed record areas. One or a plurality of record areas forms a correction area, and error correction coding is performed and recorded on the data in a correction area. When record data are reproduced and recorded again, errors are detected in the unit of the error correction area. The dc component and the like in a record area wherein an error which cannot be corrected exists are replaced by a codeword which is not used ordinarily, and a codeword for the first ac component is replaced by an end-of-block codeword. <IMAGE> |
