Underflow prevention circuit of variable length code decoder

摘要

This research is about the variable Regal number machine,A counter (10) for extracting the number of PSC; picture star code from the input bit column and,In order to determine whether the video start code (PSC) is input to the specified number, the comparison unit (11) which compares the output value of the counter (10) with the reference value,A synchronous signal generator (12) and a synchronous signal generator (12) using the comparison signal to generate a synchronous signal,In order to control the clock of the system, a clock control unit (13) generating a signal (clock) is provided, and the coefficient of the second frame begins to occur after recovery,Starting from the new Fuhu action, the data of the new frame is made. Once the image start code (PSC) occurs, the Fuhu action will be stopped to prevent the first in selection memory in front of Fuhu flag from being flipped.