Method and apparatus for computing MPEG video reconstructed DCT

Details Method and apparatus for computing MPEG video reconstructed DCT Method and apparatus for computing MPEG video reconstructed DCT

1997-04-11

1999-11-09

Mancuso, Joseph

Image analysis

Image compression or coding

Including details of decompression

382250, 358433, G06K 936, G06K 946, H04N 1415

Patent

active

059829354

ABSTRACT:
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.

REFERENCES:
patent: 5768429 (1998-06-01), Jabbi et al.
patent: 5778143 (1998-07-01), Boyce

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