New Approaches and Methods of Adaptive Image Encoding

The author analyses new methods, approaches, and ideas for further development of image encoding to increase informativeness and reduce computational complexity. An architecture (a set of adaptive encoding modes with minimal computational expenses for selecting and switching between them) for a simplified high-speed codec is developed. Simple universal algorithms for predicting pixel values based on external data and using values of neighboring blocks are provided. A modification of MSE (shifted MSE) is proposed. A one-norm simplified cosine transform of order 16 with low computational complexity is proposed. A new algorithm for adaptive use of transforms of different types and orders depending on the compression coefficient is given.