Method of computing wavelets temporal coefficients of a...

Details Method of computing wavelets temporal coefficients of a... Method of computing wavelets temporal coefficients of a...

H - Electricity

04

N

H04N 7/30 (2006.01) G06T 9/00 (2006.01)

Patent

CA 2446271

The invention relates to a method of computing wavelets temporal coefficients of a GOP (Group Of Pictures) the length of which is 2n. A controlled temporal transform is applied recursively generating n decomposition levels. Each decomposition level comprises the mean and the mean difference of each couple of input signals. During the last n-1 decomposition levels each decomposition level transform block is controlled by a control signal corresponding to the sum of two temporal mean differences outputted from the previous decomposition level. The corresponding temporal means of said previous decomposition level are the input signals for said transform block. When the said control signal is equal to zero the output values of said transform block is the temporal mean value and the temporal mean difference of the input signals. When the control signal is different from zero, the output signals are the said input signals.

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