Patent ID: 6671320
Filing Date: 2003-12-30
Classification: H04N

Abstract:
A method for converting a CIF compressed video to a QCIF video bitstream, the method comprising the steps of:selecting a coding mode for a macroblock in a QCIF video sequence without motion estimation; selecting a motion vector for a macroblock in a QCIF video sequence without motion estimation; wherein said selected coding mode and said selected motion vector correspond to a QCIF video sequence and said selected motion vector is represented by a horizontal component NMVH that is proportional to a first summation of a horizontal component MVH[i] and a vertical component NMVV that is proportional to a second summation of a vertical component MVV[i], said horizontal and vertical components MVH[i], MVV[i], representing a horizontal and a vertical component of a motion vector associated with a coding mode i and said first and second summations are carried out over a plurality of coding modes indexed by i; and performing DCT-MC and accessing six DCT prediction error blocks without MC based on determining if at least one of said NMVH and said NMVV have a non-zero value.