romt.vhd

用于视频运动图像编码的HUFFMAN编码

library ieee;
use ieee.std_logic_1164.all;
package ROMS is
	--declare a 171*21 ROM called ROM
	constant ROM_WIDTH:integer:=8;
	subtype ROM_WORD is std_logic_vector(ROM_WIDTH-1 downto 0);
	subtype ROM_RENGE is integer range 0 to 7;
	type ROM_TABLE is array(0 to 7) of ROM_WORD;
	constant ROM:ROM_TABLE:=ROM_TABLE'(
		("00100101"),("01010000"),	--0/0 0/1
		("00010010"),("00011100"),	--0/2 0/3
		("00100101"),("00101110"),	--0/4 0/5
		("00111110"),("01000111"));	--0/6 0/7
		
		
end ROMS;