Patent ID: 8648967

Claim:
A video signal processing device comprising: an N line buffer configured to delay input video data such that lines are delayed from 1 line to N lines respectively to create delayed input video data, where N is an integer of 2 or greater; a first multiband signal generator configured to generate first multiband signals that are obtained by dividing the delayed input video data output from the N line buffer into a first plurality of frequency bands, each having data lines delayed from 1 line to X lines respectively, where X is an integer of 2 or greater and smaller than N; M line buffers configured to delay each of the data in the first plurality of frequency bands output from the first multiband signal generator such that lines are delayed from 1 line to M lines respectively, where M is an integer; an analyzer configured to analyze characteristics of the input video data by selecting regions with a maximum of M horizontal pixels and M vertical lines in the data in the first plurality of frequency bands which is output from the M line buffers such that lines are delayed from 1 line to M lines respectively, and to detect correlations in each of the regions, between source data that is equivalent to the input video data, and the data in the first plurality of frequency bands; a second multiband signal generator configured to set a cutoff frequency based on a result of the analysis by the analyzer, and generate second multiband signals which are obtained by dividing the delayed input video data output from the N line buffer into a second plurality of frequency bands; and an amplitude adjuster and synthesizer configured to adjust respective amplitudes of the data in the second plurality of frequency bands output from the second multiband signal generator, based on the result of the analysis by the analyzer, and to synthesize and output the data in the second plurality of frequency bands.