FPGA dither算法代码
时间: 2024-05-04 10:22:23 浏览: 95
以下是一个简单的FPGA dither算法代码示例,使用VHDL语言实现:
```vhdl
library ieee;
use ieee.std_logic_1164.all;
entity dither is
port (
clk: in std_logic;
data_in: in std_logic_vector(7 downto 0);
data_out: out std_logic_vector(7 downto 0)
);
end entity dither;
architecture rtl of dither is
signal quant_error: std_logic_vector(7 downto 0);
begin
process(clk)
begin
if rising_edge(clk) then
--计算量化误差
quant_error <= data_in - data_out;
--执行dither算法
if quant_error > "10000000" then
data_out <= data_out + "00000001";
elsif quant_error > "01000000" then
data_out <= data_out + "00000010";
elsif quant_error > "00100000" then
data_out <= data_out + "00000100";
elsif quant_error > "00010000" then
data_out <= data_out + "00001000";
elsif quant_error > "00001000" then
data_out <= data_out + "00010000";
elsif quant_error > "00000100" then
data_out <= data_out + "00100000";
elsif quant_error > "00000010" then
data_out <= data_out + "01000000";
elsif quant_error > "00000001" then
data_out <= data_out + "10000000";
else
data_out <= data_out;
end if;
end if;
end process;
end architecture rtl;
```
该代码实现了一个简单的8位dither算法,将输入数据data_in与输出数据data_out之间的量化误差计算并根据该误差添加适当的dither。其中,dither值的选择是硬编码在代码中的,可以根据具体应用进行调整。
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