Patent ID: 6108448
Filing Date: 2000-08-22
Classification: G06T

Abstract:
A system for extracting spatially reduced image sequences in a motion compensated compressed format that supports the coding of interlaced frames, comprising:a sequence of motion compensated compressed video frames each with a plurality of pixels, the sequence defined by a bit stream, stored in a memory, each frame coded in an intraframe format and each frame having one or more intra-coded blocks containing one or more frequency components created by a Discrete Cosine Transform (DCT) of the pixels in the frame, a plurality of said intra-coded blocks forming a macroblock;an extractor, executed by a processor, that performs one of an interlacing and a deinterlacing operation on said macroblock and traverses the bit stream and selects a subset of the frequency components from one or more of the intra-coded blocks within said macroblock; anda constructor, executed by the processor, creates combinations of the frequency components in the subset to construct one or more spatially reduced images in a second sequence, each spatially reduced image having a plurality of second pixels.