Block transform coder for arbitrarily shaped image segments

Details Block transform coder for arbitrarily shaped image segments Block transform coder for arbitrarily shaped image segments

G - Physics

06

F

G06F 1/00 (2006.01) H04N 7/26 (2006.01) H04N 7/30 (2006.01)

Patent

CA 2124712

The present invention is directed at a Transform Coder Unit (TCU) to transform an arbitrarily shaped image into optimal transform coefficients (OTC) for data transmission. The TCU comprises a forward transform which transforms the image to transform coefficients, and a TCS generator which generates a transform coefficient set (TCS) from the transform coefficients. The TCU also contains an inverse transform which transforms the TCS to a computed region block having computed pel values. Finally, the TCU comprises a replacer which replaces those computed pel values corresponding to the interior pel set with the original pel values to form a modified computed region block which is re-iterated until optimal transform coefficients are determined. The present invention is also directed at a process for determining optimal transform coefficients using the aforementioned device.

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