The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1998
Filed:
Jun. 20, 1996
Applicant:
Inventors:
Venkat Mattela, Sunnyvale, CA (US);
Srinivasa Malladi, San Jose, CA (US);
Assignee:
LSI Logic Corporation, Milpitas, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348415 ; 348400 ; 348403 ; 348416 ; 348417 ; 348423 ; 348699 ; 358433 ; 36472502 ;
Abstract
An MPEG decoder system and method an MPEG decoder system and method for decoding frames of a video sequence. The MPEG decoder includes IDCT computation logic which computes the IDCT with improved performance. The IDCT logic performs the inverse DCT based on the Chen algorithm for IDCT computation. The system and method of the present invention efficiently utilizes properties of the coefficients in optimizing the matrix multiply functions, thus providing improved performance. Chen's algorithm is commonly used to perform the two-dimensional IDCT. According to the Chen algorithm, the transform matrix I is defined as: