Method and apparatus for computing MPEG video reconstructed DCT coefficients

摘要

A novel apparatus and method is disclosed to perform discrete cosine transform (DCT) coefficient reconstruction more efficiently and using less hardware resources than prior art techniques. The invention comprises a correction factor generator apparatus which computes a correction factor which is used in the DCT coefficient reconstruction process. Use of the correction factor enables DCT coefficient reconstruction to be performed using lesser computations and lesser hardware resources than prior art techniques. The apparatus and method can be used to perform DCT coefficient reconstruction for both MPEG-1 and MPEG-2 encoded video data streams.