Patent ID: 6665344
Filing Date: 2003-12-16
Classification: H04N

Abstract:
A method of downconverting received frame and field coded DCT coefficient blocks to reconstructed pixel field blocks, wherein the frame and field coded DCT coefficient blocks have motion vectors associated therewith, the method comprising the following steps:a) converting the received frame coded DCT coefficient blocks to converted field coded DCT coefficient blocks and performing an IDCT on the converted field coded DCT coefficient blocks to produce residual or pixel field blocks; b) directly performing an IDCT on the received field coded DCT coefficient blocks to produce residual or pixel field blocks; c) selecting reference pixel blocks based upon the motion vectors, upsampling the reference pixel blocks, and downsampling at least a portion of the upsampled reference blocks to form a prediction; and, d) adding the prediction to the residual field blocks to form reconstructed field blocks.