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关于 vpfe_init函数



您好,我想问下 我在用DM6437做图像处理。由于要自己加图像算法,所以研究了vpfe_init函数,这个函数里面有句话 sph = 1, nph = 1440, according to page 32-33 of the CCDC spec for BT.656 mode, this setting captures only the 720x480 of the active NTSV video window 。我想问下,一行是720个像素点,但NPH为什么是1440呢?NPH不是水平像素的个数吗?我在看TMS320DM643x DMP Video Processing Front End (VPFE) User's Guide里面也没找出个所以然。