关于视频隔行扫描

OSTnm

关于视频隔行扫描 [复制链接]

BT656视频格式，一帧大小为576*720；
采用隔行扫描，那么是不是奇数场存储于前面288*720字节，偶数场存于后面288*720字节？

问这个问题的原因是，看了个中值滤波的例程

程序把
      /*屏幕上奇数行进行处理*/
      aValue[0] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i-1)*numPixels + (j-1)));
      aValue[1] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i-1)*numPixels + j));
      aValue[2] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i-1)*numPixels + (j+1)));
      aValue[3] = (*(Uint8 *)(tempSrcYbuffer + i*numPixels + (j-1)));
      aValue[4] = (*(Uint8 *)(tempSrcYbuffer + i*numPixels + j));
      aValue[5] = (*(Uint8 *)(tempSrcYbuffer + i*numPixels + (j+1)));
      aValue[6] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i)*numPixels + (j-1)));
      aValue[7] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i)*numPixels + j));
      aValue[8] = (*(Uint8 *)(tempSrcYbuffer + (numLines/2+i)*numPixels + (j+1)));

这9个像素点进行中值最后赋给第i行第j列的像素点