Hierarchical encoding method and apparatus employing...

Details Hierarchical encoding method and apparatus employing... Hierarchical encoding method and apparatus employing...

H - Electricity

04

N

H04N 7/26 (2006.01) G06T 3/00 (2006.01) H04N 7/36 (2006.01) H04N 7/46 (2006.01) H04N 7/13 (1990.01)

Patent

CA 2082640

2082640 9118478 PCTABS00008 To improve reproduction of images transmitted over a narrow-band channel (20), image frames are first arranged in a hierarchy of decimation levels. A first error signal is generated by comparing corresponding levels of decimated background data with current image data, and second error data is generated by comparing corresponding levels of frame-predicted warped data also with the current image data. These two error signals are then compared to determine which data more closely represents the current image data. In another embodiment, motion compensation is used.

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