Structure and method for a multistandard video encoder

Details Structure and method for a multistandard video encoder Structure and method for a multistandard video encoder

1995-10-24

1997-02-18

Kostak, Victor R.

Television

Bandwidth reduction system

Data rate reduction

348441, H04N 1104

Patent

active

056045409

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.

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