| 摘要 |
PURPOSE: A reframing apparatus is provided to reduce a monitor frequency by detecting a frame alignment word(FAW) using a high-speed input signal without dividing the input signal. CONSTITUTION: A reframing apparatus comprises a data converting part(10), a detector(20),an encoder(30), a state judging part(40), a multiplexer(50) and a D-flip flop(60), which are operated in synchronization with a 78Mbps clock pulse. The data converting part(10) receives 8-bit parallel data of 78Mbps, and outputs 16-bit parallel data by outputting the received 8-bit parallel data directly as a lower byte and by delaying and outputting the received 8-bit parallel data as an upper byte. The detector(20) receives the 16-bit parallel data from the data converting part(10) to detect a frame recognition pattern. The detector(20) outputs a pulse signal and FAW position information when the frame recognition pattern is detected. The encoder(30) receives the detected position information(DT£7: 0|) of the detector(20) to perform a 3-bit encoding process so as to be allotted into an encoding value with regard to each detection case. The state judging part(40) receives position information(S£2: 0|) and a SUM signal from the encoder(30) to judge whether a present reframing is successful. The state judging part(40) outputs an OOF state signal at a fail and an IN state signal at a success. |
