| 摘要 |
A receiving arrangement receives digitally coded data signals transported over a channel. The data signal includes sequences divided into blocks, and the receiving arrangement includes an error correcting device providing a number of alternative blocks, an error detecting device, and a storing device for storing information relating to each possible block position of a sequence. The error detecting device includes a differential CRC-decoder including a first decoding device for decoding a sequence of blocks using a reference sequence to provide a reference syndrome and a second decoding device for decoding selected alternative differential blocks of the sequence obtainable via the error correcting device. The differential blocks are calculated as a difference between the corresponding block of the reference sequence and alternative blocks, respectively, to provide differential syndromes. The resulting syndromes are calculated as a sum of the reference syndrome and of a number of differential syndromes, respectively. |
