Method and apparatus for processing video signal using reduced quadratic transformation

摘要

The present invention relates toBased on reduced quadratic transformationIn a method of restoring a video signalThe step of deriving the secondary conversion index from the video signal and the second order conversion corresponding to the second conversion index, andThe secondary conversion isIt means reduced secondary conversion;The reduced quadratic transformation isN register data (NX1 register) input L (L The conversion coefficient data (LX1 transform coefficient vector) of n is output.Currently performing entropy decoding and inverse quantization for blocks (NxN);Obtaining the transform coefficient block andPerforming the reverse quadratic transformation for the transform coefficient block using the reduced quadratic transformation andThe reverse conversion of the block in which the reverse quadratic transformation has been executed is performed andA method is disclosed which includes the step of restoring the present block using a block in which the reverse first order conversion is performed.Selection diagram