Patent ID: 7006572
Filing Date: 2006-02-28
Classification: H04N

Abstract:
1. A method for decoding a video encoded as a compressed bitstream encoded as a plurality of blocks, comprising: variable length decoding and inverse quantizing the bitstream to determine motion vectors and DCT coefficients of the blocks of the bitstream; inverse discrete cosine transforming the DCT coefficients to produce reconstructed blocks; generating, for each reconstructed block, a low-resolution block of the DCT coefficients constructed according to an ordered pattern determined by a shape function, wherein a number of DCT coefficients of the low-resolution blocks is less than a number of the DCT coefficients of the reconstructed blocks; and motion compensating the reconstructed blocks with the low-resolution blocks to decode the video, wherein each reconstructed block includes a plurality of pixels, and the shape function partitions the reconstructed block into covered pixels and uncovered pixels.