DI831 3BSE013212R1 ABB

【厦门莫格电气自动化有限公司】

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一、 滤波器
这是个128抽头的滤波器，使用线性插值算法来对水平方向的像素数据进行*步的缩小操作，系数可选：1/2,1/3,1/4……. ,1/128。
二、 1024x24 行缓冲区
该行缓冲区来存储被滤波器处理过的一行数据。
三、 1024x24 行缓冲区控制器
该控制器控制着缓冲区数据的访问。缓冲区中被读出的数据会反馈到输入端口，跟第二行的像素数据进行线性插值，也就是垂直插值的处理。
四、 2048x24 行缓冲区
这个行缓冲区是一个乒乓结构的存储器，它由两个1024x24位的单端口SRAM组成。因为我们放大的处理是基于双线性算法，所以垂直放大系数被限制在2，乒乓结构可以提供同时进行读/写操作的机制，使得我们能够把行缓冲区存储器的大小压缩到仅仅一行像素数据的规模。
五、 2048x24 行缓冲区控制器
该控制器提供必需的地址线和控制信号给乒乓结构的行缓冲区，以确保RGB像素数据能够同时正确的被写入和读出。除了这个基本的控制功能以外，它也提供了一个可靠的外部LCD控制器访问接口。
六、 垂直Scalar滤波器
该垂直Scalar滤波器是2抽头，它执行一个“加-乘”混合计算(y[n] = a * x[n] + (1-a) * x[n-1])。x[n]是当前行的像素数据，x[n-1]是上一行的像素数据，y[n]是滤波器的输出。a和(1-a)都是滤波器因子。由于R/G/B各数据是独立进行处理的，所以每一种色彩像素数据处理需要两个8x9位的乘法器和一个17位的加法器。
七、 垂直Scalar系数产生器
该发生器分为放大系数产生器和缩小系数产生器。他们都会产生一个9位的系数，MSB代表整数部分，其余的都是小数部分。这个系数为输入图像垂直分辨率和输出图像垂直分辨率的比值。
八、 Scalar数据FIFO
该数据FIFO的存储深度为8，垂直缩放模块输入数据到FIFO，水平缩放模块读出数据用来处理后续的水平像素数据。
九、 水平Scalar滤波器
该滤波器也是2抽头，它执行一个“加-乘”混合计算(y[n] = a * x[n] + (1-a) * x[n-1])，x[n]是当前的像素数据，x[n-1]是上一个的像素数据，y[n]是滤波器的输出。a和(1-a)都是滤波器因子。由于R/G/B各数据是独立进行处理的，所以每一种色彩像素数据处理需要两个8x9位的乘法器和一个17位的加法器。
 
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