| 摘要 |
PURPOSE:To perform the superposition of frame without missing information in an arbitrary information bit, by avoiding the disagreement of the frame information and missing of information bit in the restoration to the original code, through the provision of the respective code F to codes 1, 0. CONSTITUTION:NRZ signal 1 and clock signal 2 are input to the CMI coding circuit 4 of data signal, and they are converted into the code 1 when an NRZ logic signal 1 is input and converted into the code 0 when NRZ logic signal 0 is input, to output the CMI code 6. Further, the signal 1, clock signal 2 and NRZ frame signal 3 are fed to the CMI encoding circuit 5 of the frame signal, and when the signal 3 is input, the CMI code 7 and frame insertion control signal 8 having superimposed frame to the codes 1 and 0 are output. Further, the signal is selected with the control signal 8 through the selector 9 to output the frame overlap CMI code 10 without missing of the information bit. |
