| 摘要 |
PURPOSE:To decode a variable length code in one cycle. CONSTITUTION:A variable length code string IN is shifted to the left so that a variable length code being a current decoding object comes to a head based on an address of a variable length code being the current decoding object stored in a pointer register 9 with a 1st shifter 2, an output signal S2 of the 1st shifter 2 for the variable length code decoded at present is shifted left to allow a variable length code to be decoded next to come to a head and the result is outputted to a code register 4. The code register 4 latches the code at a rising of a clock CLK to provide an output to a ROM circuit 5. The ROM circuit 5 uses an address outputted from the code register 4 to provide an output of a variable length code and a parameter. A parameter register 6 provides an output of a parameter 6 to an output terminal OUT. Sets of variable length code length are summed up by an adder 8 and the address of a current variable length code string IN is outputted to a pointer register 9. |
