Patent ID: 6222886
Filing Date: 2001-04-24
Classification: H04N

Abstract:
A method for decoding compressed video data, comprising the steps of:receiving compressed video data in a channel buffer, said compressed video data including a quantization matrix, a quantizer scale, and a field/frame coding type;decompressing said compressed video data and transferring said decompressed video data to a display memory;recompressing a portion of said decompressed video data as intraframe data, to be used as an anchor frame, using a discrete cosine transform, said quantization matrix, said quantizer scale, and said field/frame coding type for the recompression, and storing said intraframe data, said quantization matrix, said quantizer scale, and said field/frame coding type in a compressed anchor frame storage;motion compensating said intraframe data;selecting a reference picture from said intraframe data; anddecompressing a region of interest of said reference picture.