Patent ID: 6408025
Filing Date: 2002-06-18
Classification: H04N

Abstract:
Method of coding a digitized picture having picture objects with an arbitrary number of pixels, which comprises:coding pixels with shape-adaptive transform coding; forming transform coefficients of the transformed pixels in accordance with: cj={square root over ({fraction (2+L /N)})}Â·DCTâˆ’N(p, k)Â·xj, where cj are the transform coefficients and xj are the transformed pixels, N represents a magnitude of a picture vector to be transformed and in which the transformed pixels are contained, DCTâˆ’N designates a transform matrix having the size NÃ—N, and p, k designate indices, whereby p, k &egr;[0, Nâˆ’1]; and carrying out the shape-adaptive transform coding such that a signal energy of pixels to be transformed in a space domain is substantially identical to a signal energy of transformed pixels in a frequency domain.