A data processor 1 converts serial data in an STM-16 to parallel data that
is based on eight bytes (64 bits). A transparent information detector 10
detects the position of the data (transparent data) as a candidate for
transparent processing in the parallel data and transparent processors 30a
through 30e serially connected in five stages converts the transparent
data and rearranges the processed data based on the detected information.
Thus, the data processor 1 can perform transparent processing easily via a
relatively low-speed general-purpose device, by converting high-speed
serial data in the STM-16 to every 8-byte parallel data for further
processing.