spatial scalability造句

例句与造句

1. in fact, scaling technology is an essential component in many image / video processing such as to magnify / minify still image, to achieve special effect like picture-in-picture, to compress or transform digital video with spatial scalability etc . in this thesis we mainly employ this technology in video transcoding, which is a powerful but computationally intensive tools to convert one kind of video format into another, meeting different demand such as lower bitrates or various display terminals . in sum, there are two kinds of scaling schemes : one is in spatial domain and the other in transform domain . the scheme in transform domain can provide very good performance, that is, efficient computation and desirable image quality, whereas it has some disadvantage which is impossible or hardly to o vercome, especially some scenarios require arbitrary ratio zoom in horizontal and vertical, and excellent visual effect
   两种方法都各有其利弊：变换域的方法是利用现有常用的视频压缩方案都是基于dct这个特点，所以可以直接在变换域做处理，这样可以节省大量的计算，但其缺点是由于dct是基于块的变换，如88，所以很难找到一种方案可以进行任意比例的缩放，尤其是在纵横缩放比例不一致的情形，但这对诸如hd缩放到sd和空域分级的压缩方案来说尤为重要，基于空域滤波的方法却没有这样的限制，同时可以保证缩放后的图像的质量远高于基于变换域的方法，为了达到高的缩放质量，就不可避免导致计算量过大。
2. It's difficult to find spatial scalability in a sentence. 用spatial scalability造句挺难的