首页>
外国专利>
Reversible transform for lossy and lossless 2-D data compression
Reversible transform for lossy and lossless 2-D data compression
展开▼
机译:可逆转换,实现有损和无损二维数据压缩
展开▼
页面导航
摘要
著录项
相似文献
摘要
A 2D transform and its inverse have an implementation as a sequence of lifting steps arranged for reduced computational complexity (i.e., reducing a number of non-trivial operations). This transform pair has energy compaction properties similar to the discrete cosine transform (DCT), and is also lossless and scale-free. As compared to a separable DCT transform implemented as 1D DCT transforms applied separably to rows and columns of a 2D data block, the transforms operations are re-arranged into a cascade of elementary transforms, including the 2x2 Hadamard transform, and 2x2 transforms incorporating lifting rotations. These elementary transforms have implementations as a sequence of lifting operations.
展开▼