Enhanced video data compression in intelligent video information

Details Enhanced video data compression in intelligent video information Enhanced video data compression in intelligent video information

1998-04-29

1999-12-21

Peeso, Thomas R.

Electrical computers and digital processing systems: multicomput

Bused computer networking

709266, H04N 979

Patent

active

060062762

ABSTRACT:
A video image data field to be compression-encoded is divided into rectangular blocks. Each of the rectangular blocks is compared with a corresponding block of a reference image to generate comparison data. The block of the image to be encoded is selected for representation if the comparison data for the block meets a selection criterion. The comparison data is generated on the basis of coefficients formed by applying an orthogonal transform to the blocks of the reference image and to the blocks of the image to be encoded. Mapping data is generated which is indicative of locations in the image plane corresponding to the selected blocks. The image to be encoded is represented in compressed form by header data, the mapping data and image data representative of the selected blocks. When the reference image is compression encoded, the blocks may be expanded in areas of the reference image which correspond to a low information density.

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