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:
Jan. 21, 1997
Filed:
Feb. 16, 1995
Applicant:
Inventor:
Bradley Howe, San Jose, CA (US);
Assignee:
C-Cube Microsystems, Inc., Milpitas, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348718 ; 348716 ;
Abstract
A structure and a method for providing a video signal encoder under the MPEG-1 and MPEG-2 standards are provided. In one embodiment, a novel scheme for mapping an image to an external memory allows fetching of video data by either field of frame. In addition, an automatic reload of a DMA channel memory allows automatic fetching of an entire 20.times.20 luma reference picture area, or a 12.times.12 chroma reference picture area, while crossing the minimal number of DRAM page boundaries. A novel dequantization instruction in the CPU of the video signal encoder allows efficient oddification of DCT coefficients according to MPEG-1 and MPEG-2 standards.