decoder.vhd

用于视频运动图像编码的HUFFMAN编码

---------      电子系                 学号：J02301                姓名：张宗旺----

library ieee;
use ieee.std_logic_1164.all;
entity TWO_TO_4_DEC is
	
	
	port(I:in Std_logic_vector(1 downto 0);
	 	O:out Std_logic_vector(3 downto 0));
end TWO_TO_4_DEC;

architecture ALG of TWO_TO_4_DEC is
	begin
		DECODER: process(I)
		begin 
			case I is
			when "00"=>O<="0001" ;
			when "01"=>O<="0010" ;
			when "10"=>O<="0100" ;
			when "11"=>O<="1000" ;
			when others =>NULL;
		end case;
	end process DECODER;
end ALG;