Telegram decoder and transponder reader including the same

Telegram decoder device, in accordance with an aspect of the invention, through a predetermined calculation processing circuit as heat a predetermined bit of the error detection and the input n bits to perform the error detected by the arithmetic processing circuit as heat bits of the input n-bit It includes parts of synchronization to perform a synchronization process. In this case, error detection and synchronization unit is arranged in a structure for receiving with a bit string of n bits, and error detection is processed through and an error in the bit string of an input n-bit detection, the calculation of the input n-bit processing circuit arithmetic processing results for n-1 bits, and performs error detection based on the output one bit following the 1-bit, the new input to the new input.